Fluke 1595A Thermometer User Manual

1594A/1595A
Super-Thermometer
Technical Guide
159X____tgeng0000
Limited Warranty & Limitation of Liability
Each product from Fluke Corporation (“Fluke”) is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year(s) for the thermometer. The warranty
period begins on the date of the shipment. Parts, product repairs, and services are warranted for 90 days. The
warranty extends only to the original buyer or end-user customer of a Fluke authorized reseller, and does
not apply to fuses, disposable batteries or to any other product, which in Fluke’s opinion, has been misused,
altered, neglected, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants
that software will operate substantially in accordance with its functional specifications for 90 days and that it
has been properly recorded on non-defective media. Fluke does not warrant that software will be error free or
operate without interruption. Fluke does not warrant calibrations on the Super-Thermometer.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only
but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for importation costs of repairs/replacement parts when
product purchased in one country is submitted for repair in another country.
Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price, free of charge repair,
or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center or send the product, with a
description of the difficulty, postage, and insurance prepaid (FOB Destination), to the nearest Fluke authorized
service center. Fluke assumes no risk for damage in transit. Following warranty repair, the product will be
returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that the failure was caused
by misuse, alteration, accident or abnormal condition or operation or handling, Fluke will provide an estimate
or repair costs and obtain authorization before commencing the work. Following repair, the product will be
returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY
SPECIAL, INDIRECT, INCIDENTAL. OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF
Fluke Corporation
799 E. Utah Valley Drive • American Fork, UT 84003-9775 • USA
Phone: +1.801.763.1600 • Telefax: +1.801.763.1010
E-mail: support@hartscientific.com
www.hartscientific.com
Specifications subject to change without notice. • Copyright © 2008 • Printed in USA


Table of Contents
1
Before You Start..................................................................................... 1
1.1 Symbols Used.............................................................................................................1
1.2 Safety Information.......................................................................................................1
1.2.1WARNINGS........................................................................................................................1
1.2.2CAUTIONS.........................................................................................................................2
1.3 Authorized Service Centers........................................................................................2
2
Introduction and Specifications........................................................... 5
2.1Introduction.................................................................................................................5
2.2Specifications.............................................................................................................5
2.2.1General...............................................................................................................................5
2.2.2 Primary Specifications.......................................................................................................6
2.2.2.1
2.2.2.2
2.2.2.3
2.2.2.4
Resistance Ratio Accuracy.......................................................................................................6
Resistor Stability........................................................................................................................6
Absolute Resistance Accuracy.................................................................................................7
Measurement Current Accuracy................................................................................................7
2.2.3 Ancillary Specifications......................................................................................................8
2.2.3.1
2.2.3.2
Temperature Measurement Noise..............................................................................................8
Relative Measurement Current Accuracy..................................................................................8
2.2.4 General Specifications.......................................................................................................9
2.2.5 Applying the Specifications...............................................................................................9
2.2.5.1Introduction................................................................................................................................9
2.2.5.2
How the Super-Thermometer Measures....................................................................................9
2.2.5.3
Example 1: Measuring an SPRT..............................................................................................10
2.2.5.4
Example 2: Calibrating an SPRT..............................................................................................12
2.2.5.5
Example 4: Measuring a 100 Ω PRT........................................................................................13
2.2.5.6
Example 5: Measuring a 10 kΩ Thermistor.............................................................................14
3
Preparation for Operation.................................................................... 15
3.1
3.2
3.3
3.4
3.5
4
Unpacking and Inspection.......................................................................................15
Instruction Manuals...................................................................................................15
Line Voltage and Fuses............................................................................................15
Connecting to Line Power.........................................................................................16
Placement and Rack Mounting.................................................................................16
Front and Rear Panel Features........................................................... 17
4.1Introduction...............................................................................................................17
4.2 Front Panel Features.................................................................................................17
4.2.1 Measurement Inputs........................................................................................................17
4.2.2 USB Connection...............................................................................................................17
4.2.3 Front Panel Keys..............................................................................................................18
4.2.3.1
Front Panel Display..................................................................................................................19
4.3 Rear Panel Features.................................................................................................20
4.3.3.1
4.3.1
4.3.2
4.3.3
4.3.4
External Resistor Inputs...........................................................................................................20
Scanner Connection.........................................................................................................20
Future Peripheral Connection..........................................................................................21
Remote Operation Connections.......................................................................................21
Line Voltage Connection..................................................................................................22
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1594A/1595A Super-Thermometer

4.3.5 Earth Ground Connection................................................................................................22
5
Menus and Screens............................................................................. 23
5.1Introduction...............................................................................................................23
5.2 Changing Settings....................................................................................................23
5.3 Password Protection.................................................................................................24
5.4 Menu Navigation.......................................................................................................24
5.5 Menu System............................................................................................................24
5.6 Measurement Screen................................................................................................25
5.6.1
5.6.2
5.6.3
5.6.4
5.6.5
5.6.6
5.6.7
5.6.8
5.6.9
5.6.10
Channel Measurement Display........................................................................................26
Channel Summary Section...............................................................................................26
Statistics Fields................................................................................................................27
Data/Graph Section..........................................................................................................27
Status and Alert Section...................................................................................................27
START/STOP MEASUREMENT (F1).................................................................................28
SHOW TABLE/GRAPH (F2)..............................................................................................28
RESET STATISTICS (F3)...................................................................................................28
CLEAR GRAPH/CLEAR MESSAGE (F4)..........................................................................28
START/STOP RECORD (F5) ............................................................................................28
5.7 Main Menu................................................................................................................28
5.7.1 CHANNEL SETUP (F1).....................................................................................................29
5.7.1.1
5.7.1.2
ASSIGN PROBE (F1)...............................................................................................................29
CHANNEL SETTINGS (F2)......................................................................................................30
5.7.2 PROBE MENU (F2)...........................................................................................................34
5.7.2.1
5.7.2.2
5.7.2.3
5.7.2.4
5.7.2.5
ADD PROBE (F1) ....................................................................................................................34
COPY PROBE (F2)...................................................................................................................36
EDIT PROBE (F3).....................................................................................................................36
READ PROBE (F4)...................................................................................................................37
MANAGE PROBES (F5) ..........................................................................................................37
5.7.3 MEASURE MENU (F3)......................................................................................................38
5.7.3.1
5.7.3.2
5.7.3.3
5.7.3.4
5.7.3.5
SCAN SETTINGS (F1)..............................................................................................................39
TIMING SETTINGS (F2)...........................................................................................................39
DIGITAL FILTER (F3)................................................................................................................41
RECORDING MENU (F4).........................................................................................................41
ZERO-POWER MEASUREMENT (F5)......................................................................................43
5.7.4 DISPLAY MENU (F4)........................................................................................................46
5.7.4.1
5.7.4.2
5.7.4.3
5.7.4.4
5.7.4.5
USER SETTINGS (F1)..............................................................................................................47
FIELD SETTINGS (F2) .............................................................................................................48
STATISTICS SETTINGS (F3).....................................................................................................49
GRAPH SETTINGS (F4)...........................................................................................................49
TEMPERATURE UNIT (F5).......................................................................................................50
5.7.5 SYSTEM MENU (F5).........................................................................................................50
5.7.5.1
5.7.5.2
5.7.5.3
TIME DATE (F1).......................................................................................................................50
REMOTE INTERFACE (F2).......................................................................................................51
CONFIG (F3)............................................................................................................................52
5.7.6 RECALL CONFIG (F2)......................................................................................................53
5.7.7 DELETE CONFIG (F3)......................................................................................................54
5.7.7.1
5.7.7.2
6
PASSWORD (F4)......................................................................................................................54
CALIBRATION (F5)..................................................................................................................55
Getting Started..................................................................................... 57
6.1 Powering on the Super-Thermometer.......................................................................57
iv


6.2 User Settings Screen................................................................................................57
6.3 Connecting a Probe or Resistor................................................................................58
7
Making Measurements........................................................................ 61
7.1Introduction...............................................................................................................61
7.2 Measuring a Temperature Probe..............................................................................61
7.3 Scanning Multiple Temperature Probes....................................................................62
7.4 Measuring Resistance Ratio.....................................................................................62
7.5 Configuring an External Reference Resistor.............................................................62
7.6 Making A Zero-Power Measurement........................................................................63
8
Remote Operation................................................................................ 65
8.1Introduction...............................................................................................................65
8.2 Configuring the Network (LAN) Port.........................................................................65
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.2.6
8.3
8.4
8.5
8.6
8.7
Hardware Mac Address...................................................................................................66
Selecting Dynamic Host Configuration Protocol (DHCP).................................................66
Setting a Static Internet Protocol (IP) Address.................................................................66
Setting the LAN Gateway Address..................................................................................67
Setting the LAN Subnet Mask..........................................................................................67
Setting the Host Name.....................................................................................................67
Using the Web Interface...........................................................................................68
Configuring the USB Port.........................................................................................68
Configuring the RS-232 Serial Port...........................................................................69
Configuring the IEEE-488 Port..................................................................................69
Interface Commands................................................................................................70
8.7.1 Command Syntax.............................................................................................................70
8.7.2 List of Commands............................................................................................................70
8.7.3 Descriptions of Commands..............................................................................................74
8.7.3.1*CLS.........................................................................................................................................74
8.7.3.2
*ESE <value>...........................................................................................................................74
8.7.3.3*ESR?.......................................................................................................................................74
8.7.3.4*IDN?.......................................................................................................................................75
8.7.3.5*RST.........................................................................................................................................75
8.7.3.6
*SRE <value>..........................................................................................................................75
8.7.3.7*STB?.......................................................................................................................................76
8.7.3.8
CAL:DATE <year>,<month>,<day>........................................................................................76
8.7.3.9
CAL:PAR:LIN<n> <value>......................................................................................................76
8.7.3.10 CAL:PAR:RES<n> <value>.....................................................................................................76
8.7.3.11 CAL:PAR:ZERO <value>.........................................................................................................76
8.7.3.12CALC<n>:AVER:ALL?.............................................................................................................77
8.7.3.13CALC<n>:AVER:AVER?...........................................................................................................77
8.7.3.14CALC[<n>]:AVER:CLEA..........................................................................................................77
8.7.3.15 CALC:AVER:COUN <value>...................................................................................................77
8.7.3.16CALC<n>:AVER:MAX?............................................................................................................78
8.7.3.17CALC<n>:AVER:MIN?.............................................................................................................78
8.7.3.18CALC<n>:AVER:SDEV?...........................................................................................................78
8.7.3.19CALC<n>:AVER:SEM?............................................................................................................79
8.7.3.20CALC<n>:AVER:SPR?.............................................................................................................79
8.7.3.21CALC<n>:AVER:SSIZ?............................................................................................................79
8.7.3.22 CALC:AVER:TCON NORM|MOV..............................................................................................79
8.7.3.23 CALC:DELT:CHAN <channel>................................................................................................79
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1594A/1595A Super-Thermometer

8.7.3.24CALC<n>:DELT:DATA?............................................................................................................80
8.7.3.25 CALC:DELT:MODE OFFS|CHAN..............................................................................................80
8.7.3.26 CALC:DELT:OFFS <value>......................................................................................................80
8.7.3.27 CALC<n>:TYPE TEMP|RES|RAT..............................................................................................80
8.7.3.28 DATA:REC:ALL <boolean>......................................................................................................80
8.7.3.29 DATA:REC:FILE <name>.........................................................................................................81
8.7.3.30 DATA:REC:MEM INT|USB|BOTH..............................................................................................81
8.7.3.31 DATA:REC[:STAT] <boolean>..................................................................................................81
8.7.3.32DISP:ALER:CLEA.....................................................................................................................81
8.7.3.33DISP:ALER[:READ]?................................................................................................................81
8.7.3.34 DISP:DATE:FORM YMD|DMY|MDY..........................................................................................81
8.7.3.35 DISP:DEC:FORM PER|COMM.................................................................................................81
8.7.3.36DISP:FIEL:FEED<n>? .............................................................................................................81
8.7.3.37 DISP:FIEL:MEM <n> ...............................................................................................................82
8.7.3.38 DISP:FIEL:MEM<n1>:FEED<n2> <feed> ..............................................................................82
8.7.3.39 DISP:HELP <boolean>............................................................................................................82
8.7.3.40 DISP:LANG ENGLISH|CHINESE|JAPANESE|SPANISH|GERMAN|FRENCH|RUSSIAN............82
8.7.3.41 DISP:TEMP:DIG <digits>.........................................................................................................82
8.7.3.42 DISP:WARN:DUE <boolean>..................................................................................................82
8.7.3.43 DISP:WARN:ITS <boolean>....................................................................................................83
8.7.3.44 FETC? <channel>....................................................................................................................83
8.7.3.45 INIT:CONT <boolean>.............................................................................................................83
8.7.3.46 INIT:STOP:BEEP <boolean>....................................................................................................83
8.7.3.47 INIT:STOP:DUR <value>..........................................................................................................83
8.7.3.48 INIT:STOP[:STAT] <boolean>..................................................................................................84
8.7.3.49INIT:STOP:TIME?.....................................................................................................................84
8.7.3.50 INP<n>:CURR <current>........................................................................................................84
8.7.3.51INP<n>:CURR:DATA?..............................................................................................................84
8.7.3.52 INP<n>:CURR:STAN <boolean>.............................................................................................84
8.7.3.53 INP:PROB:ADD <id>...............................................................................................................84
8.7.3.54INP:PROB:COUN?...................................................................................................................85
8.7.3.55 INP:PROB:DEL <id>................................................................................................................85
8.7.3.56INP:PROB:FIRS?......................................................................................................................85
8.7.3.57 INP<n>:PROB:IDEN <id>.......................................................................................................85
8.7.3.58INP:PROB:NEXT?....................................................................................................................85
8.7.3.59 INP:PROB:PAR <id>,<name>,<value>...................................................................................86
8.7.3.60 INP:PROB:TEST? <id>,<resistance>......................................................................................87
8.7.3.61 INP:REAR<n>:RS:IDEN <id>|VAR|NONE................................................................................87
8.7.3.62 INP:RS:ADD <id>....................................................................................................................88
8.7.3.63INP:RS:COUN?........................................................................................................................88
8.7.3.64 INP:RS:DEL <id>.....................................................................................................................88
8.7.3.65INP:RS:FIRS?...........................................................................................................................88
8.7.3.66 INP<n>:RS:IDEN <id>|VAR|NONE..........................................................................................88
8.7.3.67INP:RS:NEXT?..........................................................................................................................89
8.7.3.68INP:RS:OVEN:STAB?...............................................................................................................89
8.7.3.69 INP:RS:PAR <id>,<name>,<value>........................................................................................89
8.7.3.70 INP<n>:RS:ROUT <source>...................................................................................................89
8.7.3.71 ROUT:CLOS <channel>..........................................................................................................90
8.7.3.72ROUT:CLOS:STAT?..................................................................................................................90
8.7.3.73 ROUT:SCAN <channel list>.....................................................................................................90
8.7.3.74 ROUT:SCAN:ADD <channel list>............................................................................................91
8.7.3.75 ROUT:SCAN:ALT <boolean>...................................................................................................91
8.7.3.76 ROUT:SCAN:DEL <channel list>.............................................................................................91
8.7.3.77 ROUT:SCAN:REF <channel>...................................................................................................91
8.7.3.78 ROUT:SCAN:REP <value>.......................................................................................................91
8.7.3.79 ROUT:SCAN:STAT <boolean>.................................................................................................92
vi


8.7.3.80 SENS:APER[:DISP] <time>......................................................................................................92
8.7.3.81 SENS:APER:PRES NORM|PREC|FAST|LONG.........................................................................92
8.7.3.82 SENS:APER:SAMP <time>......................................................................................................92
8.7.3.83 SENS:AVER1[:STAT] <boolean>..............................................................................................92
8.7.3.84 SENS:AVER2[:STAT] <boolean>..............................................................................................93
8.7.3.85 SENS:AVER2:COUN <count>.................................................................................................93
8.7.3.86SENS:AVER2:CLEA..................................................................................................................93
8.7.3.87SENS[<n>][:FRES]:DATA?.......................................................................................................93
8.7.3.88SENS[<n>]:RRAT:DATA?..........................................................................................................93
8.7.3.89STAT:OPER?.............................................................................................................................94
8.7.3.90STAT:OPER:COND?.................................................................................................................94
8.7.3.91 STAT:OPER:ENAB <value>......................................................................................................94
8.7.3.92STAT:QUES?.............................................................................................................................94
8.7.3.93STAT:QUES:COND?.................................................................................................................94
8.7.3.94 STAT:QUES:ENAB <value>......................................................................................................94
8.7.3.95SYST:BEEP[:IMM]....................................................................................................................95
8.7.3.96 SYST:BEEP:KEY <boolean>....................................................................................................95
8.7.3.97 SYST:BEEP:ALER <boolean>..................................................................................................95
8.7.3.98SYST:CODE:VERS?..................................................................................................................95
8.7.3.99 SYST:COMM:GPIB:ADDR <value>..........................................................................................95
8.7.3.100 SYST:COMM:GPIB[:STAT] <boolean>.....................................................................................95
8.7.3.101 SYST:COMM:GPIB:TERM LIN|RET..........................................................................................95
8.7.3.102 SYST:COMM:SER:BAUD <value>...........................................................................................95
8.7.3.103 SYST:COMM:SER:LIN <boolean>...........................................................................................95
8.7.3.104 SYST:COMM:SOCK:ADDR <IP address>...............................................................................95
8.7.3.105 SYST:COMM:SOCK:CONT OFF|ON|QUER.............................................................................96
8.7.3.106 SYST:COMM:SOCK:DHCP <boolean>....................................................................................96
8.7.3.107 SYST:COMM:SOCK:GAT <IP address>..................................................................................96
8.7.3.108 SYST:COMM:SOCK:KEEP <seconds>....................................................................................96
8.7.3.109SYST:COMM:SOCK:MAC?......................................................................................................97
8.7.3.110 SYST:COMM:SOCK:MASK <IP address>...............................................................................97
8.7.3.111 SYST:COMM:SOCK:NAME <name>.......................................................................................97
8.7.3.112 SYST:COMM:USB[:STAT] <boolean>......................................................................................97
8.7.3.113SYST:CONF:CHAN?.................................................................................................................97
8.7.3.114SYST:CONF:SCAN?.................................................................................................................97
8.7.3.115 SYST:DATE <year>,<month>,<day>.......................................................................................97
8.7.3.116SYST:ERR?...............................................................................................................................98
8.7.3.117 SYST:KLOC <boolean>...........................................................................................................98
8.7.3.118SYST:PASS:CDIS......................................................................................................................98
8.7.3.119 SYST:PASS:CEN <password>.................................................................................................98
8.7.3.120SYST:PASS:CEN:STAT?............................................................................................................99
8.7.3.121 SYST:PASS:GROU:MEAS <boolean>......................................................................................99
8.7.3.122 SYST:PASS:GROU:PROB <boolean>......................................................................................99
8.7.3.123 SYST:PASS:GROU:RES <boolean>.........................................................................................99
8.7.3.124 SYST:PASS:GROU:TIME <boolean>.......................................................................................99
8.7.3.125 SYST:PASS:NEW <current password>,<new password>.......................................................99
8.7.3.126SYST:PON:MIN?.......................................................................................................................99
8.7.3.127 SYST:TIME <hour>,<minute>,<second>................................................................................99
8.7.3.128 SYST:TIME:DAYL OFF|NAM|EUR.............................................................................................99
8.7.3.129 TEST:CURR:CONF <channel>,<current>,<polarity>............................................................100
8.7.3.130 TEST:CURR[:STAT] <boolean>..............................................................................................100
8.7.3.131TEST:LIN:ABOR.....................................................................................................................100
8.7.3.132TEST:LIN:PAR?.......................................................................................................................100
8.7.3.133TEST:LIN:INIT.........................................................................................................................100
8.7.3.134TEST:LIN:REP<n>?................................................................................................................101
8.7.3.135TEST:LIN:REP:TIME?.............................................................................................................101
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1594A/1595A Super-Thermometer

8.7.3.136TEST:LIN[:STAT]?...................................................................................................................101
8.7.3.137TEST:LIN:TIME?.....................................................................................................................101
8.7.3.138TEST:LIN:TOL<n>?................................................................................................................102
8.7.3.139TEST:SYST:ABOR...................................................................................................................102
8.7.3.140TEST:SYST:INIT......................................................................................................................102
8.7.3.141TEST:SYST:REP[<n>]?...........................................................................................................102
8.7.3.142TEST:SYST:STAT?...................................................................................................................102
8.7.3.143 UNIT:TEMP C|K|F...................................................................................................................102
9Calibration.......................................................................................... 103
9.1Introduction.............................................................................................................103
9.2 SYSTEM TEST (F1).................................................................................................103
9.3 CURRENT TEST (F2)..............................................................................................103
9.4 RATIO CALIBRATION (F3)......................................................................................104
9.4.1 WRITE FILE (F1).............................................................................................................106
9.4.2 ADJUST PARAMETERS (F2)..........................................................................................106
9.5 RESISTANCE CALIBRATION (F4)...........................................................................106
9.5.1 WRITE FILE (F1).............................................................................................................107
9.5.2 ADJUST RESISTOR (F2)................................................................................................108
9.6 CALIBRATION PARAMETERS (F5).........................................................................108
9.6.1 Calibration Interval.........................................................................................................108
9.6.2 Standby Current Check..................................................................................................109
10Maintenance........................................................................................ 111
11Troubleshooting..................................................................................113
Index............................................................................................................115
viii


Figures
Figure 1 PEM (Power Entry Module)..................................................................................16
Figure 2 Front view............................................................................................................17
Figure 3 Front Panel Display..............................................................................................19
Figure 4 Rear view.............................................................................................................20
Figure 5 External Resistor Inputs.......................................................................................20
Figure 6 Power Entry Module............................................................................................22
Figure 7 Location Descriptor Example..............................................................................23
Figure 8 Alpha-Numeric Interface.....................................................................................23
Figure 9 Measurement Screen...........................................................................................26
Figure 10 Channel Setup Screen.......................................................................................29
Figure 11 Probe Menu Screen...........................................................................................34
Figure 12 Measure Menu Screen.......................................................................................38
Figure 13 Measurement Process Block Diagram..............................................................39
Figure 14 Display Menu Screen........................................................................................46
Figure 15 System Menu Screen.........................................................................................50
Figure 16 Input Wiring.......................................................................................................58
Figure 17 Super-Thermometer Web Interface...................................................................68
Figure 18 Current meter connection diagram.................................................................103
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1594A/1595A Super-Thermometer

Tables
Table 1 Symbols...................................................................................................................1
Table 2 Resistance Ratio Accuracy Specifications.............................................................6
Table 3 Resistor Stability Specifications..............................................................................7
Table 4 Absolute Resistance Accuracy Specifications.......................................................7
Table 5 Measurement Current Accuracy Specifications.....................................................8
Table 6 Temperature Measurement Noise Specifications...................................................8
Table 7 Relative Measurement Current Specifications........................................................8
Table 8 General Specifications............................................................................................9
Table 9 Optional Accessories............................................................................................15
Table 10 Front panel key descriptions...............................................................................18
Table 11 Remote Operation Connections..........................................................................21
Table 12 Alert Messages...................................................................................................27
Table 13 Recommended Reference Resistor for Various Probe Types.............................30
Table 14 Probe Conversion Information.............................................................................35
Table 15 Default Statistical Fields......................................................................................48
Table 16 Statistical Field Descriptions...............................................................................48
Table 17 Recommended Reference Resistors and Sensing Current................................62
Table 18 Remote Operation Ports......................................................................................65
Table 19 Report Operation Commands.............................................................................70
Table 20 Recommended Resistors For Testing The Current...........................................104
x
Before You Start
Safety Information
1 Before You Start
1.1 Symbols Used
Table 1 lists the symbols that may be used on the instrument or in this manual and the meaning of each
symbol.
Table 1 Symbols
Symbol
Description
Symbol
Description
AC (Alternating Current)
PE Ground
AC-DC
Hot Surface (Burn Hazard)
Battery
Read the User’s Guide
(Important Information)
Complies with European Union
directives
Off
DC
On
Double Insulated
Standby Indication
Electric Shock
Canadian Standards
Association
Fuse
C-TICK Australian EMC mark
Ground
The European Waste Electrical
and Electronic Equipment
(WEEE) Directive (2002/96/EC)
mark.
1.2 Safety Information
This instrument is compliant to EN 61010-1 {2nd Edition}, and CAN/CSA 22.2 No 61010.1-04, Pollution
Degree 2. This instrument is designed for indoor use only. Use this instrument only as specified in this manual.
Otherwise, the protection provided by the instrument may be impaired.
The following definitions apply to the terms “Warning” and “Caution”.
●●
●●
“WARNING” identifies conditions and actions that may pose hazards to the user.
“CAUTION” identifies conditions and actions that may damage the instrument being used.
1.2.1 WARNINGS
●● DO NOT use this unit in environments other than those listed in the User’s Guide.
●● Follow all safety guidelines listed in the User’s Guide.
●● Calibration equipment should only be used by trained personnel.
●● This instrument can measure extreme temperatures. Precautions must be taken to prevent personal
injury or damage to objects. Probes may be extremely hot or cold. Cautiously handle probes to prevent
personal injury. Carefully place probes on a heat/cold resistant surface or rack until they reach room
temperature.
●● DO NOT operate near flammable materials.
●● Use only a grounded AC mains supply of the appropriate voltage to power the instrument.
1
1594A/1595A Super-Thermometer
Authorized Service Centers
●●
●●
●●
DO NOT connect an AC mains supply that does not match the voltage setting on the back of the unit.
DO NOT use this instrument in combination with any probe ( PRT or thermistor) to measure the
temperature or resistance of any device where the probe might come in contact with a conductor that is
electrically energized. Severe electric shock, personal injury, or death may occur.
DO NOT position this instrument in a manner where it is difficult to reach the power cord or power
entry module mains switch. When rack mounting the instrument, ensure the rack power cord and mains
supply switch are accessible.
1.2.2 CAUTIONS
●● If the instrument is dropped, struck, or handled in a way that causes internal or external physical
damage, immediately unplug the instrument, discontinue use, and contact a Fluke Authorized Service
Center for repair. Do not attempt to disassemble or repair the instrument. Refer repairs or replacement
of components to a Fluke Authorized Service Center.
●● DO NOT connect AC voltage to any input terminal on the instrument. Permanent damage to the
instrument will result.
1.3 Authorized Service Centers
Please contact one of the following authorized Service Centers to coordinate service on your Fluke product:
Fluke Corporation
799 E. Utah Valley Drive
American Fork, UT 84003-9775
USA
Phone: +1.801.763.1600
Telefax: +1.801.763.1010
E-mail: support@hartscientific.com
Fluke Nederland B.V.
Customer Support Services
Science Park Eindhoven 5108
5692 EC Son
NETHERLANDS
Phone: +31-402-675300
Telefax: +31-402-675321
E-mail: ServiceDesk@fluke.nl
Fluke Int’l Corporation
Service Center - Instrimpex
Room 2301 Sciteck Tower
22 Jianguomenwai Dajie
Chao Yang District
Beijing 100004, PRC
CHINA
Phone: +86-10-6-512-3436
Telefax: +86-10-6-512-3437
E-mail: xingye.han@fluke.com.cn
2
Before You Start
Authorized Service Centers
Fluke South East Asia Pte Ltd.
Fluke ASEAN Regional Office
Service Center
60 Alexandra Terrace #03-16
The Comtech (Lobby D)
118502
SINGAPORE
Phone: +65 6799-5588
Telefax: +65 6799-5588
E-mail: antng@singa.fluke.com
When contacting these Service Centers for support, please have the following information available:
●●
●●
●●
●●
Model Number
Serial Number
Voltage
Complete description of the problem
3
Introduction and Specifications
Specifications
2 Introduction and Specifications
2.1 Introduction
The Fluke family of Hart Super-Thermometers long ago established the standard for easy-to-use, precision
temperature measurement instrumentation. Laboratories worldwide have selected the Super-Thermometer
not only for the assurance of achieving high-quality results, but also for the innovative features that increase
productivity in the lab. The Fluke 1594A and 1595A Hart Super-Thermometers continue this legacy adding
new patent pending measurement technology and features that truly are best in class. Below is a summary of
key capabilities and features.
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Typical 1595A accuracy 0.2 ppm (0.05 mK), 1594A accuracy 0.8 ppm (0.2 mK)
Sample rates as fast as 1 second
Measures SPRTs, HTPRTs, PRTs, and thermistors
Four input channels on the front panel accept most probe terminations with the patented DWF, goldplated, tellurium-copper, quick-connect terminals
Configurable standby current for each input channel minimizes self-heating transients when scanning
between channels
Two input channels on the back panel, dedicated for external standard resistors, keep the front panel
inputs free for Reference Thermometers or Standard Resistors and UUTs
Channel Select Keys above each input channel change color to indicate whether a channel is actively
measuring, in standby, or inactive—pressing a channel key activates the selected channel
Temperature-controlled internal reference resistors allow for traceable temperature and absolute
resistance measurements in ambient conditions from 15 °C to 30 °C
Patent pending, Ratio Self-Calibration performs a linearity check or calibration of the SuperThermometer ratio accuracy without the need of any external equipment
Automated Zero-Power Measurement allows for determination and/or cancellation of a thermometer’s
self-heating error
Updated computer interface with USB control, RS-232, and IEEE-488 included as standard
Ethernet connection allows for remote view of the Super-Thermometer’s display from a web browser
USB memory device on the front panel to accommodate data logging, transfer of probe parameters, and
storage and retrieval of Super-Thermometer user configurations
VGA output allows the Super-Thermometer’s screen to be displayed on a VGA monitor
Selectable operating language: English, Chinese, Japanese, Spanish, French, German, or Russian
Intuitive User Interface makes the Super-Thermometer easy to configure and use right out of the box
2.2 Specifications
2.2.1 General
Current best practices in metrology require uncertainty analyses to be in compliance with the ISO Guide to the
Expression of Uncertainty in Measurement (often referred to as the “GUM”). For convenience, the specifications in this section are listed in k = 2 (95%) coverage and in k = 3 (99%) coverage to allow the user to easily
apply the specifications in an uncertainty analysis.
The following specifications apply after the standard warm-up period of 30 minutes. The Super-Thermometer
is designed to measure with accuracy and stability without the need for internal auto-cal or zeroing routines.
To realize the full potential of measurement ability, accepted metrology practices such as the use of proper
wiring should be adhered to. In addition, it is important to ensure that the instrument is correctly set up.
The specifications are divided into three categories: primary specifications, ancillary specifications, and general specifications.
5
1594A/1595A Super-Thermometer
Specifications
Primary Specifications: the core set of measurement accuracy specifications of the Super-Thermometer. They
are guaranteed for performance verification at the 99% confidence level.
Ancillary Specifications: additional specifications that help the user understand more of the uncertainties
involved in measurement. Since they may be subject to the application and setting in which the Super-Thermometer is used, they are not guaranteed for performance verification but should be considered typical.
General specifications: general specifications such as measurement range, environmental operating range,
dimensions, etc.
2.2.2 Primary Specifications
2.2.2.1
Resistance Ratio Accuracy
Resistance ratio accuracy is the ability of the Super-Thermometer to measure the ratio of two resistances, Rx/
Rs. It is determined primarily by the linearity of the measurement circuit. The following specifications apply
for resistance ratios measured with a reference resistor of 25 Ω or 100 Ω using a measurement current of 0.5
mA to 2.0 mA. Other reference resistors are specified using a factor as explained in the following specification table. Performance verification is guaranteed for 99% confidence level specifications within the specified
operating temperature range of 15°C to 30°C. The listed uncertainties are in terms of parts-per-million (ppm)
of reading unless stated otherwise.
Table 2 Resistance Ratio Accuracy Specifications
1594A Accuracy
(ppm of reading)
1595A Accuracy
(ppm of reading)
0.95 to 1.05
0.24 ppm
0.06 ppm
0.5 to 0.95, 1.05 to 2.0
0.64 ppm
0.16 ppm
0.25 to 0.5, 2.0 to 4.0
0.8 ppm
0.2 ppm
0.0 to 0.25
2.0 x 10–07 †
5.0 x 10–8 †
4.0 to 10.0
2.0 ppm
0.5 ppm
0.95 to 1.05
0.3 ppm
0.075 ppm
0.5 to 0.95, 1.05 to 2.0
0.8 ppm
0.2 ppm
Ratio Range
95% confidence level, 1-year
99% confidence level, 1-year
0.25 to 0.5, 2.0 to 4.0
1.0 ppm
0.25 ppm
0.0 to 0.25
2.5 x 10–7 †
6.3 x 10–8 †
4.0 to 10.0
2.5 ppm
0.63 ppm
†
Specifications are in terms of absolute ratio
All specifications listed in this table apply when using a 25 W or 100 W
reference resistor. Multiply stated specifications by a factor of 2 when using a
10 W reference resistor with sensing current between 1 and 5 mA, and a factor
of 10 when using a 1 W reference resistor with sensing current between 5 and
20 mA. When using a 10 kohm reference resistor, internal or external, use the
Absolute Resistance Accuracy specification in Table 4.
2.2.2.2
Resistor Stability
Resistor stability characterizes the ability of the instrument to accurately compare two similar resistances
within some time period using the internal resistors as references. The following specifications apply using the
given reference resistor over a one-minute average. The specifications assume typical laboratory conditions,
which do not include transportation and large ambient temperature fluctuations.
Resistance stability is determined by the short-term stability of the internal reference resistors and control
stability of the temperature stabilizing block. It does not include measurement noise.
6
Introduction and Specifications
Specifications
Table 3 Resistor Stability Specifications
Resistor (Rs)
2.2.2.3
Accuracy (ppm of reading),
95 % confidence level
24 hours
30 days
1 W
5 ppm
10 ppm
10 W
0.5 ppm
2 ppm
25 W
0.25 ppm
1 ppm
100 W
0.2 ppm
1 ppm
10 kW
0.25 ppm
1 ppm
Absolute Resistance Accuracy
Absolute resistance accuracy is the ability of the instrument to measure absolute resistance, Rx, using the
internal reference resistors. The following specifications apply using the given reference resistor, Rs, and
excitation current.
The 1-year specifications include calibration uncertainty, reference resistor drift, ambient temperature sensitivity, resistance ratio uncertainty, and measurement noise using 1-minute average and a 2-second sample period
(n = 30).
Performance verification is guaranteed for 99% confidence level, 1-year specifications within the specified
operating temperature range of 15°C to 30°C, maintaining a calibration interval of 6 months for the first year
and 1 year thereafter.
Table 4 Absolute Resistance Accuracy Specifications
Resistance range (Rs, current)
Accuracy (ppm of reading)
95% confidence level, 1-year
0 W to 1.2 W (1 W, 10 mA)
Greater of 40 ppm or 0.000012 W
0 W to 12 W (10 W, 3 mA)
Greater of 10 ppm or 0.000024 W
0 W to 120 W (25 W, 1 mA)
Greater of 5 ppm or 0.000024 W
0 W to 400 W (100 W, 1 mA)
Greater of 4 ppm or 0.00008 W
0 W to 10 kW (10 kW, 10 mA)
Greater of 5 ppm or 0.000012 kW
10 kW to 40 kW (10 kW, 10 mA)
8 ppm
40 kW to 100 kW (10 kW, 2 mA)
20 ppm
100 kW to 500 kW (10 kW, 1 mA)
80 ppm
99% confidence level, 1-year
2.2.2.4
0 W to 1.2 W (1 W, 10 mA)
Greater of 50 ppm or 0.000015 W
0 W to 12 W (10 W, 3 mA)
Greater of 13 ppm or 0.00003 W
0 W to 120 W (25 W, 1 mA)
Greater of 6.3 ppm or 0.00003 W
0 W to 400 W (100 W, 1 mA)
Greater of 5 ppm or 0.0001 W
0 kW to 10 kW (10 kW, 10 mA)
Greater of 6.3 ppm or 0.000015 kW
10 kW to 40 kW (10 kW, 10 mA)
10 ppm
40 kW to 100 kW (10 kW, 2 mA)
25 ppm
100 kW to 500 kW (10 kW, 1 mA)
100 ppm
Measurement Current Accuracy
Measurement current accuracy is guaranteed to meet the following specifications. The specifications are stated
as percent of selected current or in absolute mA.
7
1594A/1595A Super-Thermometer
Specifications
Table 5 Measurement Current Accuracy Specifications
Current Range
Accuracy
99% confidence level, 1-year
0.001 mA to 0.005 mA
0.00005 mA
0.005 mA to 0.02 mA
1%
0.02 mA to 0.2 mA
0.5 %
0.2 mA to 2 mA
0.2 %
2 mA to 20 mA
0.5 %
2.2.3 Ancillary Specifications
2.2.3.1
Temperature Measurement Noise
Temperature measurement noise indicates typical measurement noise in temperature measurements. The specifications below are given for averages taken over a period of 1 minute with a 2-second sample rate. The effect
of noise may be reduced for longer averages or may be greater for shorter averages.
Noise performance is dependent upon many conditions. Some of the most important things to consider are the
type of thermometer, setup, and environmental conditions such as electromagnetic interference.
Due to the subjective nature of measurement noise, it is not a guaranteed specification. The specifications
listed in the table below are obtainable in a typical laboratory environment. It is important that the user make
their own evaluation of measurement noise in the application and environment where the Super-Thermometer
is used.
Table 6 Temperature Measurement Noise Specifications
Conditions (Rs, Current)
Standard Error
of the Mean, °C
Typical performance
2.2.3.2
25 W SPRT at 0°C (25 W, 1.0 mA)
0.00002
25 W SPRT at 420°C (25 W, 1.0 mA)
0.00006
100 W PRT at 0°C (100 W, 1.0 mA)
0.00001
100 W PRT at 420°C (100 W, 1.0 mA)
0.00003
10 kW Thermistor at 25°C (10 kW, 10 mA)
0.000003
Relative Measurement Current Accuracy
Zero-Power resistance values are calculated based on measurements taken at two levels of excitation current
that differ by a factor of 1.4142. Only the portions of the errors in the currents that are uncorrelated contribute
to error in the zero-power resistance value.
The following specifications may be used to estimate the contribution of current error in zero-power resistance
measurements.
Table 7 Relative Measurement Current Specifications
Range
Relative Accuracy, mA
99% confidence level
8
0.001 mA to 0.1 mA
0.0008
0.1 mA to 2 mA
0.003
2 mA to 20 mA
0.03
Introduction and Specifications
Specifications
2.2.4 General Specifications
Table 8 General Specifications
Warm-up period
30 minutes
Measurement range
0 W to 500 kW
Measurement current range
0.001 mA to 20 mA
Measurement current reversal interval:
Sample period of 1 second or 2 seconds
Sample period of 5 second or 10 seconds
0.2 second
1.2 second
Standby current range
0.001 mA to 2 mA
AC power
100 V to 230 V (± 10 %)
50 or 60 Hz
Fuse Rating
2 A – T – 250 V
Specified operating temperature
15 °C to 30 °C
Absolute operating temperature
5 °C to 40 °C
Storage temperature
0 °C to 40 °C
Operating relative humidity, 5°C to 30°C
10 % to 70 %
Operating relative humidity, 30°C to 40°C
10 % to 50 %
Storage relative humidity
0 % to 95 %, non-condensing
Maximum operating altitude
3000 m
Dimensions:
Height
Width
Depth (with handles)
Depth (without handles)
Weight
147 mm (5.8 in)
439 mm (17.3 in)
447 mm (17.6 in)
406 mm (16.0 in)
7.3 kg (16.0 lb)
2.2.5 Applying the Specifications
2.2.5.1
Introduction
The purpose of this section is to help the user apply the specifications in measurement scenarios for which
the Super-Thermometer was designed. The following uncertainty calculation examples may not include all
uncertainties that are present in a measurement. Be sure to follow current best practices in uncertainty analysis
to correctly calculate measurement uncertainty.
2.2.5.2
How the Super-Thermometer Measures
In order to understand how to apply the specifications, it is important to know how the Super-Thermometer
measures. The fundamental measurement of the Super-Thermometer is the resistance ratio. It is the ratio
between an unknown resistance (Rx) and a reference resistor (Rs) – either internal or external. If a resistance
measurement is needed, the ratio is multiplied by the value of the reference resistor to calculate the resistance
of the Rx resistor (for more information refer to Measurement Timing in the Menus and Screens section).
If a temperature reading is required, the Rx resistance value is used to calculate the temperature using the calibration coefficients entered into the Probe Library. When ITS-90 is selected as the temperature conversion, the
Rx resistance is divided by the RTPW (resistance at the triple-point of water) value that is entered in the probe
definition. The resulting value is called WT90. The probe calibration coefficients and the ITS-90 equations are
then applied to WT90 to calculate the temperature reading of the probe.
Since WT90 is a ratio between a probe’s resistance at temperature (RT90) and its RTPW, WT90 measurement accuracy relies primarily on ratio accuracy if both RT90 (Rx) and RTPW are measured in close proximity in time.
Also, this only applies if the RTPW was measured by the Super-Thermometer and entered into the probe
definition.
9
1594A/1595A Super-Thermometer
Specifications
When calibrating an SPRT on the ITS-90, the WT90 value is measured at required fixed-point temperatures.
This is done by measuring the resistance of the SPRT at a fixed-point temperature followed immediately by
measurement of the RTPW. This is repeated for each temperature point. Once again the ratio accuracy of the
Super-Thermometer, applied to each measured resistance, determines the accuracy of the resulting WT90value.
2.2.5.3
Example 1: Measuring an SPRT
This section explains how to calculate the uncertainty of a temperature measurement when measuring a
calibrated 25.5 Ω SPRT at 157 °C, using the internal 25 Ω reference resistor in a 1595A. Since the SuperThermometer measurement accuracy is directly related to other sources of uncertainty, additional uncertainties
will be included in the calculation for completeness.
Since an SPRT can be measured with different techniques, two different calculations will be presented to represent the most common and recommended techniques.
2.2.5.3.1
Measuring With Updated RTPW
In this example, the RTPW of the SPRT is measured by a 1595A and entered into the SPRT’s probe definition
in the 1595A. Then the SPRT is measured at 157 °C, in temperature mode, using the coefficients entered in the
SPRT probe definition.
As explained above, this measurement technique primarily uses the ratio accuracy of the Super-Thermometer.
It is equivalent to measuring the ITS-90 WT90 value and using it to calculate temperature.
The total uncertainty of this measurement is based on six uncorrelated uncertainties. These uncertainties are:
Resistance ratio accuracy of the 1595A at 157 °C
Measurement noise at 157 °C
●● Resistance ratio accuracy of the 1595A at 0.01 °C (triple-point of water)
●● Measurement noise at 0.01 °C
●● Reference resistor drift
●● Uncertainty of the triple-point of water cell
The following demonstrate how to calculate and combine the listed uncertainties.
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2.2.5.3.2
Resistance Ratio Accuracy at 157 °C
The resistance of the SPRT, when measuring at 157 °C, is 41.1 Ω. The ratio of this resistance against the 25
Ω reference resistor is 1.644. From the resistance ratio accuracy specifications of the 1595A, the standard
uncertainty (k = 1) when measuring a resistance ratio of 1.644 is 0.08 ppm. This is converted to temperature
by dividing 0.08 ppm by 1.0 × 106 and then multiplying by 1.644. The result is then divided by WT90 sensitivity (dW/dT) at 157 °C which is 0.0038 (found on the SPRT calibration report, see tip below). The final result is
0.000035 °C.
2.2.5.3.3
Measurement Noise at 157 °C
Random error due to measurement noise must be included as an uncertainty. During measurement at 157 °C, it
is observed that the standard error of the mean is 0.000040 °C.
Note: The user must monitor measurement noise and use the actual measured measurement noise in the
uncertainty calculations.
2.2.5.3.4
Resistance Ratio Accuracy at 0.01 °C
Uncertainties related to measuring the RTPW of the SPRT must be included in the analysis. However, RTPW
uncertainties are magnified when applied to uncertainties of temperatures that are above 0 °C. At 157 °C this
magnification is estimated by multiplying RTPW uncertainties by the WT90 value at 157 °C (1.612 in this
example).
The resistance of the SPRT at the triple-point of water is approximately 25.5 Ω. The resistance ratio against the
25 Ω reference resistor is then about 1.02. From the resistance ratio accuracy specifications of the 1595A, the
standard uncertainty due to linearity while measuring a resistance ratio of 1.02 is 0.03 ppm. This specification
10
Introduction and Specifications
Specifications
is converted to temperature by dividing 0.03 ppm by 1.0 × 106 and then multiplying by 1.02. The result is then
divided by WT90 sensitivity, dW/dT, at 0.01 °C, which is 0.004. The final result is 0.000008 °C. After multiplying by WT90 (1.612), the uncertainty of the RTPW resistance ratio, when applied to 157 °C, is 0.000013 °C.
2.2.5.3.5
Measurement Noise at 0.01 °C
During measurement of the RTPW, it is observed that the standard error of the mean is 0.0000018 Ω. To
convert this value into temperature, divide by the resistance sensitivity (dR/dT) of the SPRT at 0.01 °C. dR/dT
at 0.01 °C is 0.1 Ω/°C (see tip below). The result is 0.000018 °C. Multiplying by WT90 (1.612) yields 0.000029
°C.
Tip: Most SPRT calibration reports list the Temperature versus W values of the SPRT in a table.
Typically, the dT/dW value at each temperature will be included in the same table. dR/dT can be
calculated by inverting dT/dW and multiplying by the RTPW of the SPRT. Also, dW/dT can be calculated
by simply inverting dT/dW.
2.2.5.3.6
Uncertainty of the TPW Cell
Uncertainty of the temperature of the triple-point of water cell must also be included. For this example, the
standard uncertainty of the triple-point of water cell is 0.000050 °C. Multiplying by WT90 (1.612) results in
0.000081 °C.
2.2.5.3.7
Reference Resistor Drift
Possible drift of the 25 Ω reference resistor between the TPW measurement and the 157 °C measurement must
be accounted for. To reduce the possible error, both measurements should be taken in close proximity in time.
For this example, the 24-hour stability specification will be used. This requires that both measurements are
taken within the same 24-hour period. The standard uncertainty due to drift of the reference resistor is 0.125
ppm. This is converted to temperature by dividing 0.125 ppm by 1.0 × 106 and then multiplying by 1.612. The
result is then divided by WT90 sensitivity (dW/dT) at 157 °C which is 0.0038. The result is 0.000053 °C.
2.2.5.3.8
Combining the Uncertainties
At this point, all of the uncertainties can be combined by root-sum-square (RSS) since they are uncorrelated.
Even though the 1595A resistance ratio accuracy is used twice in the calculation, both measurements are considered uncorrelated.
This RSS sum produces a combined standard uncertainty of 0.000115 °C. Multiplying by the coverage factor
(k = 2) results in a total expanded uncertainty of 0.000230 °C.
In this example, it is assumed the SPRT did not drift between the measurements at the TPW and 157 °C. It
may be necessary to add an additional uncertainty that accounts for SPRT drift.
2.2.5.3.9
Measuring With Calibration Report RTPW
In this example, the SPRT is monitored by periodically measuring its RTPW in a TPW cell but the original
RTPW from the SPRT calibration report is entered in the 1595A, not the measured RTPW. This requires a different set of specifications to be used in the measurement uncertainty.
The uncertainty of this measurement is based on four uncorrelated uncertainties. These uncertainties are:
●●
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●●
2.2.5.3.10
Resistance accuracy of the 1595A when measuring the SPRT at 157 °C
Measurement noise at 157 °C
Uncertainty of the SPRT resistance at the triple-point of water
Drift of the RTPW of the SPRT
Resistance Accuracy at 157 °C
The resistance of the SPRT at 157 °C is 41.1 Ω. Using the 25 Ω internal reference resistor, the 1595A oneyear resistance standard uncertainty is 2.5 ppm. This uncertainty, in terms of temperature, is calculated by first
dividing 2.5 ppm by 1.0 × 106 then multiplying by 41.1 Ω. The result is then divided by the sensitivity (dR/dT)
11
1594A/1595A Super-Thermometer
Specifications
of the SPRT at 157 °C which is 0.1 Ω/°C (see tip above). This results in a standard temperature uncertainty of
0.001028 °C.
2.2.5.3.11
Measurement Noise at 157 °C
During measurement at 157 °C, the standard error of the mean (as reported by the 1595A) is observed to be
0.00004 °C.
Note: The user must monitor measurement noise and use the actual measured measurement noise in the uncertainty calculations.
2.2.5.3.12
Uncertainty of the Calibration Report RTPW
In this example, the RTPW is not measured and entered into the 1595A. The RTPW from the SPRT calibration
report is entered into the 1595A. The standard (k = 1) uncertainty of the RTPW value listed on the calibration
report must be included. In this example, it is 0.0001 °C. As explained in the previous example, all uncertainties related to RTPW must be multiplied by WT90 of the measured temperature. Multiplying by 1.612 yields
0.000161 °C.
2.2.5.3.13
Drift of the RTPW of the SPRT
Since an SPRT tends to drift, the long-term drift should be included as a source of uncertainty. In this example
the SPRT is allowed to drift 0.002 °C. The assumed distribution of this uncertainty is rectangular. To convert
to a standard uncertainty divide by 1.732 (square root of 3). The result, 0.001155 °C, multiplied by 1.612
yields a standard uncertainty of 0.001861 °C.
2.2.5.3.14
Combining the Uncertainties
At this point, all of the uncertainties can be combined by root-sum-square (RSS) since they are uncorrelated.
The RSS sum produces a combined standard uncertainty of 0.002133 °C. Multiplying by the coverage factor
(k = 2), and rounding, results in a total expanded uncertainty of 0.0043 °C.
2.2.5.4
Example 2: Calibrating an SPRT
As explained in “How the Super-Thermometer Measures” at the beginning of this section, the calibration of an
SPRT is performed by measuring the resistance at some required fixed-point temperature and then at the triplepoint of water. The two measurements are combined by division to get a WT90 value. The uncertainty of WT90 is
based primarily on the ratio accuracy of the Super-Thermometer.
In this example, an SPRT is calibrated at 419.527 °C (FP of Zinc). The RTPW is measured directly afterward.
The uncertainties resulting from the 1595A in this example are:
Resistance ratio accuracy of the 1595A at 419.527 °C
Measurement noise at 419.527 °C
●● Resistance ratio accuracy of the 1595A at 0.01°C (triple-point of water)
●● Measurement noise at 0.01°C
●● Reference resistor drift
The uncertainties in this example are calculated and combined as described in Example 1. However, there is a
slight difference in the reference resistor drift component.
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●●
2.2.5.4.1
Reference Resistor Drift
In Example 1, the 24-hour stability specification of the internal 25 Ω is used. This may not be necessary when
calibrating an SPRT. When calibrating an SPRT typically both measurements of WT90 are taken in close proximity of time (< 8 hours elapsed time). It is possible for the reference resistor drift to be negligible, especially
if the Super-Thermometer is in a stable temperature environment.
To be sure reference resistor drift is correctly estimated, the user should perform a test to determine actual
reference resistor drift over the elapsed time. One way to perform this test is to measure a very stable external reference resistor over the actual time period using the internal reference resistor. If it is not possible to
measure the reference resistor drift, it may be necessary to use the 24-hour stability specification resulting in a
slightly larger total uncertainty. Another alternative is to use an external reference resistor of very low drift.
12
Introduction and Specifications
Specifications
2.2.5.4.2
Example 3: Measuring Zero-Power Resistance
The purpose of this example is to demonstrate how the Relative Current specification applies when performing
a zero-power measurement. The zero-power uncertainty calculated in this example would be added to the rest
of the uncertainties involved in the measurement as explained in previous examples. The intention of the zeropower measurement is to remove measurement errors due to self-heating of the SPRT.
In this example a 1595A is used to measure a 25 Ω SPRT at the triple-point of water using the Zero-Power
function. The SPRT is measured at nominal current, 1.0 mA and 1.4142 mA (double-power current). In this
example, the self-heating sensitivity of the SPRT in a triple-point of water cell is 0.0024 °C/mA. This was
found by using the Zero-Power function and reading the SELF-HEATING field in the Zero-Power results
screen. This value will vary significantly depending on temperature, measurement medium, and probe
construction.
The uncertainties used to calculate zero-power uncertainty are:
●●
●●
●●
●●
2.2.5.4.3
Ratio accuracy of the 1595A
Measurement noise
Relative current accuracy of the 1595A
Reference resistor stability
Resistance Ratio Accuracy at 0.01 °C
The ratio accuracy at 0.01 °C is based on using the internal 25 Ω resistor to measure a resistance of 25.5 Ω.
The 1595A standard uncertainty of resistance ratio is 0.03 ppm. To convert this value to temperature divide by
1.0 × 106 and multiply by 1.02 (Rx/Rs). The result is then divided by 0.004 (WT90 sensitivity, dW/dT, at 0.01
°C, see above). The final result is 0.000008 °C.
2.2.5.4.4
Measurement Noise
The Zero-Power function reports the standard error of the mean of the zero-power value in the STANDARD
ERROR field. In this example, the standard error of the mean is 0.0000018 Ω. To convert this value into temperature, divide by the resistance sensitivity (dR/dT) of the SPRT at 0.01 °C. dR/dT at 0.01 °C is 0.1 Ω/°C (see
tip above). The result is 0.000018 °C.
2.2.5.4.5
Relative Current Accuracy
The relative measurement current specifications are listed in Table 7 of the Specifications section. The standard uncertainty of the measurement current over the range 1.0 mA to 1.4142 mA is 0.0015 mA. This is
converted to temperature by multiplying by the SPRT self-heating sensitivity at 0.01 °C which is 0.0024 °C/
mA. The result is 0.0000036 °C.
2.2.5.4.6
Reference Resistor Stability
Since the individual measurements of the zero-power measurement are taken in close proximity in time, the
drift of the reference resistor is considered negligible.
2.2.5.4.7
Combining the Uncertainties
The uncertainties of the zero-power measurement are combined by RSS with the rest of the uncertainties
involved in the measurement. See the previous examples for the other uncertainties.
2.2.5.5
Example 4: Measuring a 100 Ω PRT
In this example the temperature of a typical 100 Ω PRT is measured at 420 °C with a 1595A. The uncertainties
in the measurement associated with the 1595A are as follows:
●●
●●
2.2.5.5.1
Resistance accuracy of the 1595A
Measurement noise at 420 °C
Resistance Accuracy at 420 °C
First, calculate the 1595A absolute resistance accuracy at 257 Ω (the resistance of the 100 Ω PRT at 420 °C).
The one-year absolute resistance standard uncertainty (k = 1) of the 1594A, using the internal 100 Ω resistor,
is 2.0 ppm. To convert this to an uncertainty in temperature, multiply 2.0 ppm by 1.0 × 106 then multiply by
13
1594A/1595A Super-Thermometer
Specifications
257 Ω. Divide the result by the sensitivity of the PRT (dR/dT) at 420 °C. This can be found in the PRT calibration report. For this example, 0.4 Ω/°C is used. The resulting uncertainty is 0.0013°C.
2.2.5.5.2
Measurement Noise at 420 °C
The noise of the measurement at 420 °C is observed using the Standard Error of the Mean statistic field of the
1595A. In this example it is 0.00003 °C.
2.2.5.5.3
Combining the Uncertainties
To calculate the entire uncertainty of the measurement, the standard uncertainties from the 1595A should be
combined with the (k = 1) PRT calibration uncertainty at 420 °C. The standard uncertainties are combined by
RSS and then multiplied by the required coverage factor.
2.2.5.6
Example 5: Measuring a 10 kΩ Thermistor
In this example, a 1595A is used to measure a 10 kΩ thermistor probe at 0 °C. The 1595A accuracy, when
measuring the thermistor probe is based on the following:
●●
●●
2.2.5.6.1
Resistance accuracy of the 1595A
Measurement noise
Resistance Accuracy
First, calculate the 1595A absolute resistance accuracy at 26839.94 (the resistance of the 10-k Ω thermistor
probe at 0 °C) when using the 10 k Ω internal reference resistor. The one-year absolute resistance accuracy
is 4 ppm of reading (k = 1). This is converted to temperature by dividing 4 ppm by 1.0 × 106 and multiplying
by 26839.94 Ω. The result is then divided by dR/dt of the thermistor probe at 0 °C which, in this example, is
1244.9 Ω/°C. The final result is 0.000085 °C.
2.2.5.6.2
Measurement Noise
Measurement noise is best observed by using the Standard Error of the Mean statistics field of the Super-Thermometer. In this example, the standard error of the mean is 0.000004 °C.
2.2.5.6.3
Combining the Uncertainties
If the thermistor probe is being measured in temperature mode with calibration coefficients, the standard
uncertainty of the calibration (listed on the calibration report) would be combined by RSS with the resistance
accuracy and measurement noise uncertainties.
14
Preparation for Operation
Line Voltage and Fuses
3 Preparation for Operation
3.1 Unpacking and Inspection
The Super-Thermometer is shipped in a container designed to prevent damage during shipping. Inspect the
contents of the container for damage and immediately report any damage to the shipping company. Instructions for inspection are included in the shipping container.
Table 9 Optional Accessories
Item
Rack Mount Kit
2590 Scanner
Case
Carry-handle Kit
Extended range test report
Model or part number
1594-RMKT
2590
1594-CASE
1594-HNDL
1994 (1594A), 1995 (1595A)
3.2 Instruction Manuals
The Super-Thermometer instruction manual set is shipped on DVD. The set includes:
1594A/1595A Super-Thermometer User’s Guide
1594A/1595A Super-Thermometer Technical Guide
The 1594A/1595A Super-Thermometer User’s Guide contains instructions for unpacking and setting up the
instrument. Specifications and an overview of Super-Thermometer operation are also included. The User’s
Guide is available in the following languages: English, Chinese, Spanish, Japanese, German, French, and
Russian.
●●
●●
The 1594A/1595A Super-Thermometer Technical Guide contains complete information for setting up and
operating the Super-Thermometer. It also includes instructions for remote operation, calibration and maintenance. The Technical Guide is available in English only.
For ordering a replacement instruction manual DVD contact your local Fluke representative or service center.
All manuals are available online for download in PDF format.
3.3 Line Voltage and Fuses
CAUTION: To prevent possible damage to the instrument, verify the correct fuse is installed for the
selected line voltage setting.
The correct line power fuse and line voltage range was installed at the factory per the configuration that was
ordered. However, it is important to verify the correct fuse value and line voltage setting. The fuse is accessible on the rear panel in the PEM (Power Entry Module). The line voltage setting is shown in the PEM window
(see Figure 1 on page 16) and see Section 2.2, Specifications, on page 5 for the fuse rating.
To check or replace the fuse and to verify or change the line voltage setting, refer to Figure 1 on page 16
and proceed as follows:
15
1594A/1595A Super-Thermometer
Connecting to Line Power
1. Disconnect line power.
2. Observe what line voltage setting is displayed in the PEM window. If it is correct, the fuse assembly
will be re-inserted in the same orientation it is removed. Otherwise, it will need to be rotated 180°
before re-insertion.
3. Open the fuse compartment by inserting a screwdriver blade in the slot located at the top of the fuse
compartment and open the PEM door.
4. Use the screwdriver blade to pry out the fuse block by inserting the blade in the slot located at the top of
the fuse block.
5. Remove the fuses from the assembly for replacement or verification. Be sure the correct fuses are
installed.
6. Reinstall the fuse assembly by pushing it back into the PEM while ensuring that the correct line voltage
label is shown in the PEM window. Close the PEM door so it locks in place.
Figure 1 PEM (Power Entry Module)
3.4 Connecting to Line Power
WARNING: To avoid electrical shock, connect the factory supplied three-prong line power cord to a
properly grounded power outlet. Do not use a two-prong adapter or extension cord that will break the
ground connection.
After the line voltage setting and correct fuse are verified, connect the instrument to a properly grounded
three-prong outlet using the provided line voltage cord.
3.5 Placement and Rack Mounting
In general, place the Super-Thermometer in an area free of drafts and excessive electrical noise. Refer to the
specifications for environmental requirements.
The Super-Thermometer is designed to be used on a bench-top or installed in a standard width rack with the
optional rack mount kit. For bench-top use it is equipped with hinged, non-slip feet. For rack mount instructions, refer to the rack mount kit instruction manual.
16
Front and Rear Panel Features
Front Panel Features
4 Front and Rear Panel Features
4.1 Introduction
The Super-Thermometer has been designed with several features that help make setup and operation as simple
as possible while still providing many measurement capabilities. This section describes the front and rear
panel features as well as the menu system. Please read this section before operating the instrument.
4.2 Front Panel Features
Figure 2 Front view
4.2.1 Measurement Inputs
Four measurement inputs, channels 1 through 4, are located on the front panel. Some key points concerning
the measurement inputs are:
●●
●●
Current (C1, C2), Potential (P1, P2), and Guard (G) terminals are labeled to facilitate correct connection
(Figure 16 on page 58).
Channels 2 and 4 can also be used as reference resistor (Rs) inputs.
4.2.2 USB Connection
The USB port on the front panel allows a formatted USB memory device to be connected to the Super-Thermometer for saving measurements and settings. The memory device must be Linux compatible and formatted
with the FAT32 file system.
Important: When inserting a USB memory device into the front panel USB port, wait for about 10
seconds to allow the system to recognize the memory device before attempting to write to or read from it.
17
1594A/1595A Super-Thermometer
Front Panel Features
4.2.3 Front Panel Keys
Table 10 Front panel key descriptions
The Power Standby key turns off the display and disables the front panel keys,
sending the system into standby. Power remains applied to some internal
components such as the resistor oven.
When the system is brought out of standby by pressing the Power Standby Key, it
is not necessary to wait the 30-minute warm-up period.
The numeric keys consist of the digits 0 through 9, sign (+/-), and decimal point
(.). These keys are used for entering numeric values.
The arrow keys are used to move the cursor on the display and to navigate lists
The SETUP key is used to directly access the Channel Setup menu for quick
and easy measurement configuration.
The DELETE key is used to delete alpha-numeric characters
The EXP key is used when entering an exponential number for example: 1.0
E-04
The ENTER key is used to save a change or to select an item. When an item is
changed, ENTER must be pressed otherwise the item reverts to its original value
upon exiting.
The MENU key is used to go directly to the Main Menu screen.
The EXIT key is used to exit from a menu or setting. Pressing EXIT will leave an
edit without saving the changes. When entering a number, if EXIT is pressed and
held, the entire number is deleted and the cursor is moved to the leftmost place
in the number field.
The Function Keys are located below the display and are used to execute the
function displayed directly above them. Function keys are used to select menu
options and in certain cases they are used to toggle a setting shown on the
display.
Pressing any of the four Channel Select Keys will automatically activate the
selected channel and illuminate the Channel Select Key in green. If a channel is
in standby mode, the Channel Select Key is illuminated in amber. If a channel is
inactive,the Channel Select Key is clear.
18
Front and Rear Panel Features
Front Panel Features
4.2.3.1
Front Panel Display
The Front Panel Display is shown in Figure 3. The display screen is used to show all measurements, menus
and configuration information.
Figure 3 Front Panel Display
The default display language is English. The display can be shown in the following language options: English,
Chinese, Spanish, Japanese, German, French, and Russian.
The display language can be changed in the User Settings screen. The User settings screen is displayed, in
English (regardless of language setting), when using a shortcut key sequence that is entered from the Measurement screen. In the Measurement screen (press and hold the EXIT key to return to the Measurement screen),
press and release the ENTER key and then press the SETUP key. Use the Up/Down arrow keys to select the
LANGUAGE configuration field and then use the Left/Right arrow keys to choose the intended language.
Pressing the ENTER key saves the new selection.
For all other display configuration settings, see Section 5.7.4, DISPLAY MENU (F4), on page 46.
19
1594A/1595A Super-Thermometer
Rear Panel Features
4.3 Rear Panel Features
Figure 4 Rear view
4.3.3.1
External Resistor Inputs
Figure 5 External Resistor Inputs
The Rs1 and Rs2 external reference resistor connections are located on the rear panel. The Current (C1, C2),
Potential (P1, P2) and Guard (G) terminals are labeled to facilitate proper connection (see Figure 16 on page
58).
4.3.1 Scanner Connection
The 2590 Scanner connection is a 15-pin socket located on the back panel. It is used to control an optional
scanner. Refer to the scanner manual for connection and setup instructions.
20
Front and Rear Panel Features
Rear Panel Features
4.3.2 Future Peripheral Connection
A USB peripheral port is intended for future peripheral control.
Note: This port is NOT used for external memory connection. For external memory via USB see Section
4.2.2, USB Connection, on page 17 and Figure 2 on page 17.
4.3.3 Remote Operation Connections
The Super-Thermometer comes equipped with several remote operation connections. See Table 11 for the
remote operation connection descriptions.
Using the LAN connection and a web browser, the user is able to operate the Super-Thermometer remotely via
the provided web interface. The Super-Thermometer serves a page that allows the user to view the display and
control the Super-Thermometer through the web browser. For more information, refer to the Remote Operation section.
Table 11 Remote Operation Connections
Connection
Description
Ethernet connector that allows connection to a
network for controlling the instrument and transmitting
measurements
USB port that allows the instrument to be controlled as a
USB peripheral from a computer
9-pin subminiature D type serial port that can be used to
control the instrument via RS-232
IEEE-488 Input/Output that is compatible with IEEE488 interface and the IEC 625 Bus for controlling the
instrument
21
1594A/1595A Super-Thermometer
Rear Panel Features
4.3.4 Line Voltage Connection
Figure 6 Power Entry Module
The PEM (Power Entry Module) located on the rear panel connects the Super-Thermometer to line voltage. It
contains the Line Voltage Power Switch, the Line Voltage Fuses, and the Line Voltage Selector. See the Line
Voltage and Fuses section for configuration and connection instructions.
4.3.5 Earth Ground Connection
The Earth Ground Connection is provided to allow connection to earth ground. This connection can help improve measurement noise. It is not intended to replace the ground connection provided through the line voltage
cord.
22
Menus and Screens
Changing Settings
5 Menus and Screens
5.1 Introduction
This section provides detailed description of the Super-Thermometer menus and screens. The menus and
screens are designed to allow the user to quickly and easily set up the instrument for measurement while also
providing many configuration options. Note that some function keys are located in multiple locations in the
menu system for convenience.
Since the Super-Thermometer menu system is several layers deep, this section uses a location descriptor at the
introduction of menu function keys. This helps the user identify where the function key resides in the menu
system. Below is a location descriptor example.
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS
Figure 7 Location Descriptor Example
5.2 Changing Settings
Most screens within the menu system contain configuration fields used for changing settings. Whenever a
configuration field is changed the ENTER key must be pressed to save and apply the new value. To change a
setting, the field must be highlighted. The highlight can be moved through the fields using the Up/Down arrow
keys.
Configuration fields that have selection options are changed by pressing the Left/Right arrow keys to the
desired setting and pressing ENTER.
Numeric type fields are used for setting numeric settings, which include probe coefficients, time, and date, for
example. Values are set using the digit keys. The left and right arrow keys move among the digits to change a
digit in the number. The sign key and EXP key are necessary for signed and exponential values. The DEL key
may be used to delete a digit in the number. ENTER must be pressed to save a new value.
Some configuration fields allow entry of alpha and numeric characters. For these fields, the Alpha-Numeric
Interface is used. It automatically opens by pressing the ENTER key when a text field is highlighted.
Figure 8 Alpha-Numeric Interface
23
1594A/1595A Super-Thermometer
Password Protection
In the Alpha-Numeric Interface, use the front panel arrow keys to move the cursor to the desired character.
Press the ENTER key to enter the selected character in the text edit box. Numeric characters can be entered
using the Alpha-Numeric Interface or the front panel digit keys.
If a mistake is made, pressing the DELETE key will backspace over the character to the left of the cursor.
When the cursor is placed over a character in the text edit box, the DELETE key will delete the character
where it is located.
Use function keys MOVE BACK (F1) and MOVE FORWARD (F2) to move the cursor left or right in the text
edit box. Use function keys SAVE (F3) and CANCEL (F5) to save or cancel the changes that have been made
to the text field. The EXIT key will also exit the Alpha-Numeric Interface with no changes saved.
5.3 Password Protection
Some screens by default are password protected while others may be password protected depending on configuration settings. A screen that is password protected will open with edit ability only if a four-digit password
is entered. Otherwise, the screen will open with view only. (see Section 5.7.7.1, PASSWORD (F4), on page
54).
5.4 Menu Navigation
The following are important items to help the user understand how to navigate the menu system:
●●
●●
●●
●●
●●
●●
●●
●●
●●
●●
The Main Menu of the menu system may be accessed from the Measurement Screen (and most other
screens) by pressing the MENU key.
Function Keys (F1, F2, F3, F4, F5) are used to select menus, functions, and in some cases, to toggle
settings.
The EXIT key is used to exit a screen or menu and return to the parent screen. In most screens, pressing
and holding the EXIT key for a moment returns directly to the Measurement Screen.
Menus and screens contain help text that clarify the purpose of the menu or screen.
When any setting is changed in a screen, the ENTER key must be pressed to save the change.
When a field requires alpha-numeric character input, the Alpha-Numeric Interface opens automatically
upon pressing ENTER when the field is highlighted.
Some screens may be password protected. If the password is required, a special password screen will
appear. More information concerning password protection is found in the System Menu section.
The SETUP key provides a shortcut to the Channel Setup screen, Section 5.7.1, CHANNEL SETUP
(F1), on page 29.
Pressing ENTER, then SETUP provides a shortcut to the User Settings screen, Section 5.7.4.1, USER
SETTINGS (F1), on page 47, where the language setting and other user settings are located.
The User Settings screen will appear as the initial screen if the Start-Up Help setting is enabled
(see Section 5.7.4.1, USER SETTINGS (F1), on page 47). This assists a first-time user in setting
preferences and the system clock.
5.5 Menu System
The following is an outline of the menu system:
Measurement Screen
|
MAIN MENU (MENU key)
CHANNEL SETUP (SETUP key)
|
ASSIGN PROBE (see PROBE MENU below)
|
CHANNEL SETTINGS
|
|
SET UP Rs
|
|
ASSIGN RESISTOR
|
|
DEFINE RESISTOR
|
|
|
ADD RESISTOR
|
|
|
EDIT RESISTOR
24
Menus and Screens
Measurement Screen
|
|
|
READ RESISTOR
|
|
MANAGE RESISTORS
|
|
READ FILE
|
|
WRITE FILE
|
|
MOVE UP
|
|
MOVE DOWN
|
|
DELETE RESISTOR
|
ON/OFF
|
MEASURE MENU (see MEASURE MENU below)
PROBE MENU
|
ADD PROBE
|
COPY PROBE
|
EDIT PROBE
|
|
TEST CALCULATION
|
READ PROBE
|
MANAGE PROBES
|
READ FILE
|
WRITE FILE
|
MOVE UP
|
MOVE DOWN
|
DELETE PROBE
MEASURE MENU
|
SCAN SETTINGS
|
TIMING SETTINGS
|
DIGITAL FILTER
||CLEAR FILTER
|
RECORDING MENU
|
|
RECORDING SETTINGS
|
|
VIEW DATA
|
|
READ FILE
|
|
WRITE FILE
|
|
ERASE DATA
|
ZERO-POWER MEASUREMENT
DISPLAY MENU
|
USER SETTINGS
|
FIELD SETTINGS
|
STATISTICS SETTINGS
|
GRAPH SETTINGS
|
TEMPERATURE UNIT
SYSTEM MENU
TIME DATE
REMOTE INTERFACE
|
SERIAL
|
USB
|
NETWORK
|
IEEE-488
|
ERRORS
CONFIG
|
STORE CONFIG
|
RECALL CONFIG
|
DELETE CONFIG
|
RESTORE DEFAULT
|
UPDATE FIRMWARE
PASSWORD
CALIBRATION
SYSTEM TEST
CURRENT TEST
RATIO CALIBRATION
RESISTANCE CALIBRATION
CALIBRATION PARAMETERS
5.6
Measurement Screen
The Measurement Screen contains the function keys and display fields needed for typical measurement operation. It is the screen displayed after power-up unless the Start-Up Help setting is enabled (see Section 5.7.4.1,
USER SETTINGS (F1), on page 47). It may be recalled other screens by pressing and holding the EXIT key
25
1594A/1595A Super-Thermometer
Measurement Screen
or by pressing and releasing the MENU key then pressing the EXIT key. The following describe each section
of the Measurement Screen.
A
C
B
D
E
Figure 9 Measurement Screen
The following are the different sections of the Measurement Screen (see Figure 9) followed by detailed descriptions of each section:
A.
B.
C.
D.
E.
Channel Measurement Display
Channel Summary Section
Statistics Fields
Data/Graph Section
Status and Alert Section
5.6.1 Channel Measurement Display
The Channel Measurement Display is located at the top of the screen and shows the most recently completed
measurement and the channel from where the measurement came. This portion of the screen is always visible,
even when other screens and menus are open.
5.6.2 Channel Summary Section
The Channel Summary Section, directly below the Channel Measurement Display, on the left, shows channel
configuration information with the following four fields.
PROBE ID – shows the identification of the probe definition assigned to the channel being measured (see
Section 5.7.2, PROBE MENU (F2), on page 34)
CURRENT – shows the excitation current used in measuring the probe (see Sensing Current under Section
5.7.1.2, CHANNEL SETTINGS (F2), on page 30
RS – shows the reference resistor used for the measurement (see Section 5.7.1.2, CHANNEL SETTINGS
(F2), on page 30).
26
Menus and Screens
Measurement Screen
OVEN - indicates whether the resistor oven is stable and ready for measurement. After power up, the OVEN
field will first indicate “SETTLING” while the oven warms up and settles to the proper temperature. When the
oven temperature is stable, the field will display “READY” to indicate that the Super-Thermometer is ready
for measurement. It typically takes about 30 minutes for the temperature to settle and the indication to change
to “READY.” If only external reference resistors are used, it is not necessary to wait for the oven to settle.
5.6.3 Statistics Fields
The Statistics Fields section of the display contains user-selectable statistics fields associated with the currently displayed measurement (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48)
The Statistics Fields are displayed during measurement regardless whether Graph or Data display mode is
selected. The fields are reset when the RESET STATISTICS (F3) function key is selected.
5.6.4 Data/Graph Section
The Data/Graph section displays either a data table for each active channel as it is measured or a graph of each
channel’s measurement trend. The display is toggled from Data to Graph mode by pressing the SHOW DATA/
GRAPH (F2) function.
When the data table is selected, the Up/Down arrow keys are used to scroll through the data table to view
channels off the screen. The data fields are reset when the RESET STATISTICS (F3) function key is selected.
The graph settings are configured in the Graph Settings Screen, see Section 5.7.4.4, GRAPH SETTINGS (F4),
on page 49. The graph window can be configured to display a separate graph for each channel or all channels on one graph.
5.6.5 Status and Alert Section
The Status and Alert section resides at the bottom of the display above the function keys. Depending on the
situation, the following are displayed in the Status and Alert section:
Measurement Progress Bar- indicates the progress of the current measurement
Countdown Timer- shows the time remaining before measurement stops. The timer is set in the Timing Settings screen of the Measure menu see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39. If measurement is stopped and restarted, the timer starts over again.
Active Channel- indicates the channel currently being measured. When the measurement is completed, the
measurement value and channel number will appear in the channel measurement display.
Recording Status- indicates whether recording is in progress.
Alert Messages- displays alert messages. Alert messages only appear when the Measurement Screen is displayed. See the following table for a list of alert messages. When an alert message is displayed, the CLEAR
MESSAGE (F4) function key may be pressed to clear the message.
Table 12 Alert Messages
Priority
Message
Description
1
RECORDING ERROR
A recording error occurred, such as memory full or USB device was
removed, that prevents further recording.
2
MAXIMUM TEMPERATURE
EXCEEDED
The measured temperature exceeds the Maximum Temperature
setting specified in the probe definition.
3
ITS-90 SUBRANGE EXCEEDED
The measured temperature is outside either of the selected ITS-90
subranges in the probe definition.
4
RESISTOR DUE FOR CALIBRATION
The Rs resistor used for the measurement is due for calibration; as
specified by the Due Date setting in the resistor definition.
The following function keys are located in the Measurement screen:
27
1594A/1595A Super-Thermometer
Main Menu
5.6.6 START/STOP MEASUREMENT (F1)
The Start/Stop Measurement function key is a toggling function key that starts and stops measurement
sampling.
5.6.7 SHOW TABLE/GRAPH (F2)
The Show Table/Graph function key toggles the display between Graph mode and Data mode.
5.6.8 RESET STATISTICS (F3)
The Reset Statistics function key resets all statistics fields and sample counts.
5.6.9 CLEAR GRAPH/CLEAR MESSAGE (F4)
The Clear Graph/Clear Message function key clears the measurement trend graph. When an alert message is
displayed, this function key changes to Clear Message, which may be used to clear the alert message.
5.6.10 START/STOP RECORD (F5)
The Start/Stop Record function key is a toggling function key that starts and stops recording of measurements
to memory (see Section 5.7.3.4, RECORDING MENU (F4), on page 41).
5.7 Main Menu
The Main Menu is accessed by pressing the MENU key. The Main Menu contains the submenus used for
Super-Thermometer configuration and setup.
Figure 6- Main Menu Screen
The submenus located in the Main Menu screen are as follows:
CHANNEL SETUP - for configuring measurement channels and reference resistor settings
PROBE MENU - for assigning probe definitions to measurement channels and managing the Probe Library
MEASURE MENU - for configuring channel scanning, setting measurement timing, configuring the digital
filter and turning recording on and off
28
Menus and Screens
Main Menu
DISPLAY MENU - used to configure display settings, and statistics settings as well as selecting temperature
measurement units
SYSTEM MENU - used to configure the remote interface ports, set the system date and time, configure password settings and calibrate the Super-Thermometer
The following are detailed descriptions of each submenu and its contents.
5.7.1 CHANNEL SETUP (F1)
MAIN MENU |
The Channel Setup menu is used for configuring measurement channels and reference resistor settings. The
Channel Setups screen shows each channel and its settings. Pressing the SETUP key on the front panel will
access the Channel Setup screen directly from any other screen or menu.
For convenience, the MEASURE MENU (F4) function key is included in this menu as well as the Main
Menu. The Measure Menu is described in full detail after the Probe Menu section.
Figure 10 Channel Setup Screen
Using the Up/Down arrow keys, the user selects the channel to be configured. Pressing the ON/OFF (F3) function key enables (ON) or disables (OFF) the selected channel. Only one channel can be enabled unless SCAN
ENABLE is set to ON (see Section 5.7.3.1, SCAN SETTINGS (F1), on page 39). A channel that is disabled
will be skipped when SCAN ENABLE is set to ON. A channel can also be enabled by pressing the corresponding Channel Select Key on the front panel.
The following function keys are used to configure the channels.
5.7.1.1
ASSIGN PROBE (F1)
MAIN MENU | CHANNEL SETUP |
The Assign Probe function key allows the user to assign a predefined probe definition to the selected channel.
Upon pressing the Assign Probe function key, the Probe Library is displayed. Using the Up/Down arrow keys,
the desired probe definition is highlighted. Pressing ENTER assigns the probe definition to the previously
selected channel. For convenience, the function keys needed for editing the Probe Library are included in the
Assign Probe screen. These function keys are described in detail in the Probe Menu section.
29
1594A/1595A Super-Thermometer
Main Menu
5.7.1.2
CHANNEL SETTINGS (F2)
MAIN MENU | CHANNEL SETUP |
With the desired channel selected in the Channel Setup screen, pressing the Channel Settings function key
opens a screen that allows the user to configure the channel settings. The channel that is being configured is
identified at the top of the Channel Settings screen.
The channel configuration fields are as follows:
REFERENCE RESISTOR (Rs) - identifies the reference resistor to be used for measurement. The options
are any of the four internal resistors (1Ω, 10Ω, 25Ω, 100Ω, 10 kΩ) and any user-configured external resistor.
See Table 13 for the recommended reference resistor.
Table 13 Recommended Reference Resistor for Various Probe Types
Probe Type
Reference Resistance
Sensing Current
25 Ω SPRT
25 Ω
1.0 mA
100 Ω PRT or RTD
100 Ω
1.0 mA
2.5 Ω SPRT
10 Ω
5.0 mA
0.25 Ω SPRT
1Ω
14.14 mA
1000 Ω PRT or RTD
10 kΩ
0.05 mA
Thermistors, 2 kΩ to 20 kΩ
10 kΩ
0.01 mA
Thermistors, 20 kΩ to 100 kΩ
10 kΩ
0.002 mA
SENSING CURRENT - the excitation current used for measurement. By default, it is set to the nominal
current value entered in the probe’s definition. However, if the user enters a different sensing current, the new
value will supersede the probe definition.
The 1 x POWER (F2) function key automatically sets Sensing Current to the Nominal Current value established in the probe definition. 2 x POWER (F3) sets Sensing Current to 1.4142 times the nominal current. In
order to protect the device being measured, the current is limited by the Maximum Current setting in the probe
definition.
STANDBY CURRENT- allows current to pass through a probe or resistor even when it is not being actively
measured. This is useful for keeping the probe self-heated so it will need less time to settle when measured.
The magnitude of the standby current is the same as the Sensing Current as long as the Sensing Current is no
greater than 2 mA. If the Sensing Current is greater than 2 mA, the channel’s standby current will remain off
regardless of the Standby Current setting.
Important: All currents are switched off when Measurement is stopped. Also, when Scan Enable is on
(see Scan Enable in Section 5.7.3.1, SCAN SETTINGS (F1), on page 39), only those channels that are
enabled for measurement will have standby current on, depending on the Sensing Current and Standby
Current settings.
Tip: A probe’s sensing element is heated as current passes through it. This effect is called self-heating.
Self-heating causes a probe’s measured temperature to change slightly due to the heat being dissipated.
The measurement error associated with self-heating depends on probe design and the level of
measurement current. To measure the effect of self-heating, use the Zero-Power function in the Measure
Menu, see Section 5.7.3.5, ZERO-POWER MEASUREMENT (F5), on page 43 .
CALCULATION - determines the type of reading the channel measurement will display. The options are
RESISTANCE, RATIO and TEMPERATURE. The TEMPERATURE option is available only if a probe definition, configured for temperature measurement, has been assigned to the channel (see Section 5.7.2, PROBE
MENU (F2), on page 34). The Resistance option is not available if the channel’s Reference Resistor (Rs)
setting is set to Variable Resistance.
30
Menus and Screens
Main Menu
5.7.1.2.1
SET UP Rs (F1)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS |
Pressing the Set Up Rs function key displays the Rs definition assigned to each Rs input. The Up/Down arrow
keys are used to scroll through the list to select an Rs input for configuration. The following function keys allow the user to configure the Rs input.
5.7.1.2.1.1
ASSIGN RESISTOR (F1)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs |
The Assign Resistor function key opens the resistor definition library. This is a list of Rs configurations that
have been created by the user. The resistor definition library may contain up to 50 resistor definitions. Every
definition in the library must have a unique ID.
Also displayed in the resistor definition library, at the end of the list, are factory default options VARIABLE
RESISTANCE and NO RESISTOR.
The VARIABLE RESISTANCE option is used when the Rs resistance will vary such as when a SPRT is being
used as a reference resistor. When in this mode, measurement output will be in ratio only.
If the NO RESISTOR option is chosen, the Rs Input cannot be used as a reference resistor connection.
5.7.1.2.1.1.1
DEFINE RESISTOR (F2)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs |
The Define Resistor function key displays the resistor definition library. The displayed function keys are used
to create new Rs resistor definitions or edit definitions stored in the resistor definition library. The following
describe each function key.
5.7.1.2.1.1.2
ADD RESISTOR (F1)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | DEFINE RESISTOR |
The Add Resistor screen is used to create a new Rs definition using the following configuration fields and
function key.
RESISTOR ID - used to identify the reference resistor. Pressing the ENTER key while the RESISTOR ID
field is highlighted will open the Alpha-Numeric Interface to allow entry of a unique ID.
RESISTANCE VALUE - the resistance value of the Rs reference resistor. This resistance value is used to
calculate UUT resistance so it is important that it is entered correctly.
MAXIMUM CURRENT - establishes the maximum current allowed to be applied during measurement. This
prevents excessive current from being applied to the reference resistor.
CALIBRATION DATE - used to define when the reference resistor was calibrated. If not used, the digits can
all be set to zeros.
DUE DATE - used to alert the user when the reference resistor is due for calibration. This is only applicable if
Rs DUE ALERT is enabled in the User Settings screen, see Section 5.7.4.1, USER SETTINGS (F1), on page
47.
SAVE (F1)
The Save function key saves the settings.
CANCEL (F5)
The Cancel function key exits Add Resistor without saving changes.
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1594A/1595A Super-Thermometer
Main Menu
5.7.1.2.1.1.3
EDIT RESISTOR (F2)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | DEFINE RESISTOR |
The Edit Resistor function key opens the highlighted Rs definition for editing. The configuration fields are
explained in the Add Resistor section above.
5.7.1.2.1.2
READ RESISTOR (F3)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | DEFINE RESISTOR |
Read Resistor allows the user to load a pre-configured reference resistor definition from a USB memory
device.
To load a resistor definition, insert a USB memory device that contains a resistor configuration into the front
panel. Allow about 10 seconds for the system to recognize the USB device and then press OK (F5). A list of
resistor definition files stored on the memory device appears on the screen. Scroll through the list using the
Up/Down arrow keys and select the file to be loaded. Press OK (F5) to begin the file transfer. A message will
prompt the user to continue.
Tip: Resistor definition files must be located in a folder named “\159x\resistor” on the USB memory
device. The files must have the extension “.res” and contain resistor definition data in the proper format.
This type of file can be created by using the Write File function, see Section 5.7.1.2.1.3.2, WRITE FILE
(F2), on page 32 in the Manage Resistors menu.
5.7.1.2.1.3
MANAGE RESISTORS (F3)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs |
Rs resistor definitions in the resistor definition library may be added, deleted, or prioritized in the Manage
Resistors menu using the following function keys.
5.7.1.2.1.3.1
READ FILE (F1)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Read File function key allows the user to import an entire set of resistor definitions from a file on a USB
memory device.
Every resistor definition in the resistor definition library must have a unique ID. If a resistor definition in the
library has the same ID as one read from the USB memory device, it will be replaced.
Tip: Resistor definition files must be located in a folder named “\159x\resistor” on the USB memory
device. The files must have the extension “.res” and contain resistor definition data in the proper format.
This type of file can be created by using the Write File function, see Section 5.7.1.2.1.3.2, WRITE FILE
(F2), on page 32 in the Manage Resistors menu.
5.7.1.2.1.3.2
WRITE FILE (F2)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Write File function key in the Manage Resistors menu allows the user to export one resistor definition or
the entire library to a file on a USB memory device.
If a resistor was selected in the Manage Resistors screen, that resistor definition will be written to a file. If ALL
RESISTORS was selected, the entire Resistor Library will be written to a file.
The screen shows the name of the file to be written. The user may change the name of the file by pressing
ENTER to open the alpha-numeric editing screen. Finally, the user presses the CONTINUE function key to
32
Menus and Screens
Main Menu
write the file. If a USB memory device has not yet been inserted, the user is instructed to do so. Allow about
10 seconds for the system to recognize the USB device before continuning.
Resistor definition files are written to a folder named “\159x\resistor” on the USB memory device and have
the extension “.res”. If the file does not exist, it will be created. If the file already exists and one resistor was
selected, its resistor definition will be appended to the data in the file. If ALL RESISTORS was selected, the
contents of the existing file will be replaced with the resistor definitions in the resistor definition library.
5.7.1.2.1.3.3
MOVE UP (F3)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Move Up function key changes the arrangement of the reference resistors in the resistor definition library
by moving the selected resistor up one position. If the first resistor is selected or if ALL RESISTORS is selected, there is no action.
5.7.1.2.1.3.4
MOVE DOWN (F4)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Move Down function changes the arrangement of the reference resistors in the resistor definition library
by moving the selected resistor down one position. If the last resistor is selected or if ALL RESISTORS is
selected, there is no action.
5.7.1.2.1.3.5
DELETE RESISTOR (F5)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Delete Resistor function key may be used to delete a resistor definition from the resistor definition library.
If a resistor was selected in the Manage Resistors screen, that resistor will be deleted. If ALL RESISTORS
was selected, the entire library will be erased.
A message appears prompting the user to confirm the delete operation. The user may press the YES function key to confirm and proceed with deleting the resistor definition or library. Pressing the NO function key
cancels the operation and returns to the Manage Resistors menu. Pressing the EXIT key will also cancel the
operation with no change.
33
1594A/1595A Super-Thermometer
Main Menu
5.7.2 PROBE MENU (F2)
MAIN MENU |
Figure 11 Probe Menu Screen
The Probe Menu contains the function keys needed for editing and managing probe definitions stored in the
Probe Library.
The Probe Library is non-volatile memory inside the Super-Thermometer which contains probe configuration information that is configured and stored by the user. A user can easily program probe parameters into the
Probe Library and quickly assign the parameters to any of the measurement channels.
Tip: Once the probe definitions are programmed into the Probe Library, they can be conveniently copied
to a USB memory device (see Section 5.7.2.5, MANAGE PROBES (F5), on page 37) so they can be
backed up and easily reloaded if needed.
The following are descriptions of each function key in the Probe Menu.
5.7.2.1
ADD PROBE (F1)
MAIN MENU | PROBE MENU |
The Add Probe screen is used to add a new probe definition to the Probe Library. Up to 100 definitions can
be stored in the Probe Library. If the limit has been reached, the user will not be allowed to add more probe
definitions.
The following fields are used to define a probe configuration:
ID - is the probe ID field. The user may enter alpha or numeric characters to enter a unique probe ID up to 24
characters in length. Duplicate probe IDs cannot be saved. With the ID field selected, pressing ENTER will
open the Alpha-Numeric Interface allowing the user to enter the probe ID.
TYPE - defines the type of probe. The options are PRT, THERMISTOR, and RESISTOR. The type selected
will determine what other probe configuration fields appear.
34
Menus and Screens
Main Menu
CALIBRATION DATE - the calibration date of the probe. The digits may be set to zero if the date is
undefined.
NOMINAL CURRENT - the sensing current used for measuring the probe. The value entered is the current
used to measure the probe when 1 x Power is selected in the Channel Settings screen. Typical current settings
are 1.0 mA for a 25.5 Ω or 100 Ω PRTs and 0.010 mA for 10 kΩ thermistors (see “Table 13 Recommended
Reference Resistor for Various Probe Types” on page 30).
Caution: Sensing current must be carefully selected. Current that is too high can overheat and possibly
damage a sensor. Refer to the sensor’s manufacturer recommendations when setting the current.
MAXIMUM CURRENT - the maximum allowed sensing current. This setting is used to prevent excessive
current from damaging the sensor. This setting supersedes the Nominal Current setting.
MAXIMUM TEMPERATURE - sets the temperature limit for the probe. When a probe’s measured temperature exceeds this setting, a warning message is indicated on the Measurement screen and an audio alarm is
sounded if the Alert Beep setting is set to ON (see Section 5.7.4.1, USER SETTINGS (F1), on page 47).
CONVERSION - the type of calibration coefficients or characterization used for the probe. The characterization defines how temperature is calculated for a probe. When conversion is set to NONE, measurements will
be in resistance. See the following Probe Conversion Information table for more information.
Table 14 Probe Conversion Information
Type
Conversion
Coefficients
Equations
PRT
ITS-90
High Subrange 5 (-38 to 29 °C)
RTPW,a5, b5
High Subrange 6 (0 to 962 °C)
RTPW,a6, b6, c6, d
High Subrange 7 (0 to 660 °C)
RTPW,a7, b7, c7
High Subrange 8 (0 to 420 °C)
RTPW,a8, b8
High Subrange 9 (0 to 232 °C)
RTPW,a9, b9
High Subrange 10 (0 to 157 °C)
RTPW,a10
High Subrange 11 (0 to 30 °C)
RTPW,a11
See ITS-90 literature
Low Subrange 1 (13 to 273 K)
RTPW,a1, b1,c1,c2,c3
Low Subrange 2 (24 to 273 K)
RTPW,a2, b2,c1,c2,c3
Low Subrange 3 (54 to 273 K)
RTPW,a3, b3,c1,c2,c3
Low Subrange 4 (-189 to 0 °C)
RTPW,a4, b4
Low Subrange 5 (-38 to 0 °C)
RTPW,a5,b5
PT-100
R0
Use R0 = 100.0 for standard IEC751, ASTM-E-1137 or enter actual
probe R0 for improved accuracy
See IEC-751 or ASTM-E-1137 literature
CVD-ABC
R0, A, B, C
See CVD literature
CVD-ALPHA
R0, ALPHA, DELTA, BETA
See CVD literature
POLYNOMIAL
C0, C1,….C7
7
t[°C] = ∑ Ci R[Ω]i
i=0
35
1594A/1595A Super-Thermometer
Main Menu
Type
Conversion
Coefficients
THERMISTOR
R(T) POLYNOMIAL
B0, B1, B2, B3
T(R) POLYNOMIAL
A0, A1, A2, A3
Equations
i
 3


1
R[Ω] = exp  ∑ Bi 

 i = 0  t[°C] + 273.15  
t[°C ] =
1
∑
3
i=0
A1[ln R[Ω]]i
− 273.15
Note: With ITS-90 conversion, where subranges overlap, the high subrange supersedes the low subrange. If only subrange
5 is used in a probe definition, select subrange 5 for both High Subrange and Low Subrange. If a subrange is set to NONE,
all temperatures will be based on the programmed subrange (alerts in measurement screen inform the user when a defined
ITS-90 subrange is exceeded, see Display Settings submenu in Display Menu).
The following are the Add Probe Screen function keys.
5.7.2.1.1
TEST CALCULATION (F1)
MAIN MENU | PROBE MENU | ADD PROBE |
The Test Calculation function key helps the user verify the probe calibration coefficients were entered correctly. A resistance is entered and a temperature is calculated based on the calibration coefficients. The calculated
temperature is compared with the probe’s calibration report to verify correct coefficient entry.
5.7.2.1.2
SAVE (F2)
MAIN MENU | PROBE MENU | ADD PROBE |
The Save function key saves the newly entered probe information into the Probe Library. Exiting without
selecting SAVE cancels all changes.
5.7.2.1.3
CANCEL (F5)
MAIN MENU | PROBE MENU | ADD PROBE
The Cancel function key exits the Add Probe screen without saving changes.
5.7.2.2
COPY PROBE (F2)
MAIN MENU | PROBE MENU |
The Copy Probe function key allows the user to create a new probe definition based on an existing definition.
In the Probe Menu screen, select the probe definition to be copied. Press the COPY PROBE (F2) function
key. Update the PROBE ID field with a unique probe ID. Press the SAVE (F2) function key to save the copied
definition. If a unique ID is not entered, the ID will be appended with a _1 automatically.
5.7.2.3
EDIT PROBE (F3)
MAIN MENU | PROBE MENU |
The Edit Probe screen is used to edit probe definitions that have been entered into the Probe Library. When
Edit Probe is selected, the same probe definition fields found in the Add Probe screen are shown. Refer to Section 5.7.2.1, ADD PROBE (F1), on page 34 for a full description of each field.
Changes made in the Edit Probe screen are not saved until the SAVE (F2) function key is selected. The EXIT
key or CANCEL (F5) can be selected at any time to exit without saving changes.
36
Menus and Screens
Main Menu
5.7.2.4
READ PROBE (F4)
MAIN MENU | PROBE MENU |
The Read Probe function key allows the user to read a probe definition from the USB memory device into the
Probe Library.
When a USB memory device, that contains a probe definition file, is inserted in the front panel, the Read
Probe screen displays a list of probe definition files (*.prb) found on the memory device. By scrolling up and
down the list using the arrow keys, the user can select the desired probe definition file. Pressing the ENTER
key (with the file selected) will open the file and display the probe definitions it contains. At this point a probe
definition can be selected and read into the Probe Library by pressing the ENTER key again.
If the selected probe definition in the USB memory device has the same ID as a probe definition that already
exists in the Probe Library, a warning message appears warning that the probe definition in the library will be
replaced. The user may press the YES function key to update the probe definition and exit, or press NO (or the
EXIT key) to return to the Assign Probe screen.
Tip: Probe definition files must be located in a folder named “\159x\probe\” on the USB memory device.
The files must have the extension “.prb” and contain probe definition data in the proper format. This
type of file can be created by using the Write File function in the Manage Probes menu.
5.7.2.5
MANAGE PROBES (F5)
MAIN MENU | PROBE MENU |
The Manage Probes screen is used for reading probe definition files from memory, writing definition files to
memory, moving probe definition locations in the Probe Library and deleting probe definitions.
In the Manage Probe screen, the Probe Library is displayed as well as the following function keys.
5.7.2.5.1
READ FILE (F1)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Read File function key allows the user to read a probe definition file (.prb) from the USB memory device.
A probe definition file may contain multiple probe definition files. The files have to be located in the folder
\159x\probe\ in the memory device and have the extension .prb.
A file is read by inserting a memory device containing a valid probe definition file into the front panel. When
READ FILE (F1) is pressed, a list of all probe files that reside on the memory device is shown. The file is selected by using the using the arrow keys. The file is transferred to the Probe Library upon pressing the ENTER
key and confirming the action.
Important: Any probe definition in the Probe Library that has the same ID as any probe definition in the
memory device will be overwritten.
5.7.2.5.2
WRITE FILE (F2)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Write File function key exports one probe definition file or the entire Probe Library from the Super-Thermometer to the USB memory device.
When in the Manage Probes screen, select either a single probe definition or ALL PROBES (at the end of
the list). When WRITE FILE (F2) is selected, the name of the file to which the definitions will be written is
displayed. Pressing the ENTER key will open the Alpha-Numeric Interface so the file name can be entered.
Pressing CONTINUE (F1) writes the file to memory.
37
1594A/1595A Super-Thermometer
Main Menu
If the \159x\probe\ folder and .prb file have not been created previously, they will be created automatically
when the file is written. If the .prb file already exists, a newly written probe definition will be appended
into the file. However, if the .prb file already exists and all files are written to memory, the .prb file will be
overwritten.
5.7.2.5.3
MOVE UP (F3)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Move Up function key changes the order of the probe definitions in the Probe Library by moving the
selected definition up one position until it reaches the top of the list.
5.7.2.5.4
MOVE DOWN (F4)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Move Down function key changes the order of the probe definitions in the Probe Library by moving the
selected definition down one position until it reaches the bottom of the list (before ALL PROBES).
5.7.2.5.5
DELETE PROBE (F5)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Delete Probe function key allows the user to delete probe definitions from the Probe Library. If the Probe
Library capacity of 100 definitions has been reached, a probe definition has to be deleted before adding another definition.
A single highlighted probe definition can be highlighted and then deleted or all probe definitions can be deleted if ALL PROBES is selected. A message prompts the user to confirm the delete action before it takes place.
5.7.3 MEASURE MENU (F3)
MAIN MENU |
Figure 12 Measure Menu Screen
The Measure Menu contains the function keys needed for setting up channel scanning, measurement timing,
digital filter settings, controlling measurement recording, and performing zero-power measurements.
38
Menus and Screens
Main Menu
The following are complete descriptions of each function key.
5.7.3.1
SCAN SETTINGS (F1)
MAIN MENU | MEASURE MENU |
Scan Settings is used to set up channel scanning. The Super-Thermometer has several scan options that are
configured using the following fields.
SCAN ENABLE- turns scanning on or off by using the Left/Right Arrow Keys and pressing the ENTER key.
ON enables automatic sequencing through all enabled channels. OFF disables scanning so only one channel is
measured as selected by the user.
REPEAT COUNT- determines how many times a channel is measured before the Super-Thermometer continues to the next channel in the scan sequence. The setting has a range of 1 to 100.
ALTERNATE REFERENCE- automatically measures the reference channel after each individual channel is
measured in the scan sequence. This feature is useful in comparison type calibrations when the heat source is
not very stable.
REFERENCE CHANNEL- the setting that determines which channel is the reference channel for Alternate
Reference. The channel chosen for REFERENCE CHANNEL must be enabled (Section 5.7.1, CHANNEL
SETUP (F1), on page 29).
5.7.3.2
TIMING SETTINGS (F2)
MAIN MENU | MEASURE MENU |
The Timing Settings screen contains the settings and function keys needed for the configuration of measurement timing. The timing settings control the measurement process and the length of time it takes to produce
and display a measurement.
Measurement Timing Description
The measurement timing settings allow the user to be in control of each phase of the measurement process.
These settings enable the user to optimize timing for different applications.
To help describe the measurement process, it is broken into the following five steps.
Step 1
Step 2
Step 3
Step 4
Step 5
Sampling
Averaging
Filtering
Conversion
Display
Defined by:
Sample Period
Enabled with:
Average Enable
Enabled with:
Digital Filter
Enable
Defined by:
Probe Conversion
Defined by:
Display Interval
Figure 13 Measurement Process Block Diagram
1. Sampling - the fundamental measurement of the Super-Thermometer is the resistance ratio. The
fundamental ratio measurement is sampled once per Sample Period.
2. Averaging - the fundamental ratio measurements can be averaged (see Average Enable below) or
passed directly to Filtering. The number averaged is the number of measurement samples taken during
one Display Interval (how often the measurement display is updated). For example, if Sample Period
is set to 2 seconds and Display Interval is set to 10 seconds, 5 ratio measurement samples are averaged
per Display Interval. The display is updated with the statistical mean of the 5 measurement samples.
If AVERAGE ENABLE is OFF, only the most recent ratio measurement sample will be passed to
Filtering.
3. Filtering - after Averaging, the measurement samples can also be processed with a digital filter
(configured by using the Digital Filter function key, Section 5.7.3.3, DIGITAL FILTER (F3), on page
39
1594A/1595A Super-Thermometer
Main Menu
41) if the digital filter is ON. If the digital filter is OFF, measurement samples are passed directly to
Conversion.
4. Conversion - after filtering, the fundamental ratio measurement can be converted to the selected unit
of measure such as Temperature (Section 5.7.2.3, EDIT PROBE (F3), on page 36). If RATIO is the
selected unit of conversion, the measurement is passed directly to Display.
5. Display - after conversion, the measurement is sent to the display, remote interface, statistics
calculations, and memory at a rate of once per Display Interval. The statistical mean that is displayed in
the Measurement screen is based on n number of displayed measurements, not number of samples.
The Timing Settings screen contains the following measurement timing fields.
SAMPLE PERIOD - sets the length of time required to obtain a fundamental ratio measurement sample. The
options are 1, 2, 5, and 10 seconds. The default option is 2 seconds.
Note: When the sample period is changed, measurement will stop. It must be restarted by the user.
The 1 second option is useful for applications that require measurements at the highest possible speed, such
as thermal response tests. However, it can be expected to observe greater measurement noise will be greater
when using a 1 second sample period. The 2 seconds option provides good stable measurements for most types
of thermometer probes. The 10 seconds option may yield better results for very high resistances or with probes
that have unusually large settling effects which may be caused by electrical leakage or dielectric absorption.
A probe may be tested for electrical settling by comparing measurements made with the 2 seconds and 10
seconds sample periods.
With the 1 second and 2 seconds options the sensing current is reversed at a basic interval of 0.2 second. With
the 5 seconds and 10 seconds options the current is reversed at a basic interval of 1.2 seconds.
Sample Period cannot be larger than the Display Interval setting.
DISPLAY INTERVAL - determines how often measurements are passed to the display, statistics fields,
memory, and remote interface ports. Possible options are 1, 2, 10, 30, and 60 seconds. The default option is 2
seconds. Changing the Display Interval setting may affect the Sample Period setting, as Sample Period cannot
be greater than Display Interval.
AVERAGE ENABLE - determines whether fundamental measurement samples are averaged before being
passed to the digital filter step. If Average Enable is ON, all fundamental measurements acquired during the
Display Interval are combined by averaging. If Average Enable is OFF, or if Sample Period is the same as
Display Interval, only a single sample, the most recent, is passed to the next step in the measurement process.
The default option is ON.
STOP TIMER ENABLE - enables or disables the stop timer, which stops measurement after a specified
length of time. If Stop Timer Enable is ON, the stop timer begins counting down when measurement is started
using the START MEASUREMENT (F1) function key in the Measurement screen, and stops measurement automatically when the timer elapses. If STOP TIMER ENABLE is OFF (default setting is OFF), measurement
continues indefinitely until the user stops measurement.
When the stop timer is enabled and measurement is enabled, an hourglass symbol and the time remaining, in
hours, minutes, and seconds appears at the bottom of the Measurement screen.
TIMER DURATION - sets the stop timer duration. The value is a number of hours, minutes, and seconds,
ranging from 00:00:01 to 23:59:59. The default value is 01:00:00. This setting is only relevant when Stop
Timer Enable is ON.
AUDIO INDICATION - enables or disables the audio alert that tells the user when the stop timer elapses and
measurement stops. The default option is ON.
The Sample Period, Display Interval and Average Enable settings in the Timing Settings menu can be automatically configured by selecting one of the following preset function keys (a full description of each field can
be found later in this section):
PRESET NORMAL (F1) - is used for most applications. This setting provides a balance between speed and
precision. Sample Period and Display Interval are both set to 2 seconds and Average Enable is set to ON.
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Main Menu
PRESET PRECISION (F2) - sets the timing settings for minimal measurement noise and settling error with
most thermometer probes. Sample Period is set to 2 seconds, Display Interval is set to 10 seconds, and Average Enable is set to ON.
PRESET FAST (F3) - is used to configure the Super-Thermometer for the fastest possible measurements.
Sample Period and Display Interval are both set to 1 second. Measurement noise and electrical settling errors
may be greater in Fast mode. Fast mode is useful for certain applications such as probe response time testing.
PRESET LONG (F4) - sets the timings settings for better results with probes that exhibit long electrical settling times. Measurement noise might be slightly higher. Sample period is set to 10 seconds, Display Interval
is set to 10 seconds and Average is set to ON.
5.7.3.3
DIGITAL FILTER (F3)
MAIN MENU | MEASURE MENU |
The Digital Filter screen is used to change the digital filter settings and clear the digital filter buffer.
Digital Filter Description
The digital filter is a moving average filter that computes the arithmetic mean of display measurements stored
in a buffer. The size of the buffer is user-defined via the Average Count setting. If the buffer is full, the oldest
measurement in the buffer is discarded when a new measurement enters the buffer. If the buffer is only partly
filled, the mean is still computed using the limited number of stored measurements.
If the digital filter is enabled, the most recent measurement coming from Averaging (see Measurement Sequence Diagram in the previous section) is averaged with the previous display measurements stored in the
digital filter buffer. For example, if Display Interval is set to 10 seconds, and the digital filter average count is
20, a new display measurement is averaged with the previous 19 display measurements for a window size of
200 seconds (n = 20).
The buffer is cleared when measurement is started or if a measurement is out-of-range. This may occur, for
example, if a probe is disconnected from a channel. It may also be cleared by the user at any time using the
CLEAR FILTER (F1) function. This clears the filter for all channels at once.
The Digital Filter configuration settings and function key are as follows:
FILTER ENABLE - enables or disables the digital filter. The default option is ON.
AVERAGE COUNT - sets the number of Display Interval measurements that are averaged by the digital
filter. The setting has a range of 2 through 100. The default value is 30. This setting is only meaningful when
Filter Enable is ON.
5.7.3.3.1
CLEAR FILTER (F1) - clears
the filter buffer.
Tip: It is useful to use Clear Filter to clear the digital filter buffer when an abrupt change to the data
has occurred. This allows the filtered measurements to settle more quickly.
5.7.3.4
RECORDING MENU (F4)
MAIN MENU | MEASURE MENU |
In the Recording Menu, the user can control how measurements are recorded to a memory device (external or
internal). This menu is also used for manipulating data files including exporting of data and erasing data.
Measurements may be stored in either of two possible memory devices; Internal Memory or a external USB
Memory Device. Internal memory can store up to approximately 80,000 individual measurements. A USB
flash memory device can typically store an even greater quantity of data, depending on the memory size. Both
types of memory devices are non-volatile, meaning the data is preserved even when the power is switched off.
However, some data may be lost if the power is switched off as data is being written.
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Important: Avoid switching power off to the Super-Thermometer while measurement and recording are
in progress or recorded data may be lost.
Measurements are recorded when the START RECORD (F5) function key in the Measurement screen has
been pressed. The Status Bar at the bottom of the Measurement screen indicates if recording is ON or OFF.
Each recorded measurement includes the date and time of the measurement, channel, measured value, and
unit. Additional statistical data is also recorded when the Record Statistics setting is ON.
The data written into internal memory is organized into data sets and each data set is identified by the date and
time of the first measurement in the set. A new data set is started each time the START RECORDING (F5)
function key is selected if measurement is on. Likewise, a new data set is started each time the START MEASUREMENT (F1) function key is selected if recording is on.
Data is recorded to the USB file in ASCII text, comma separated values (CSV) format, one measurement per
line. Each line is terminated with a carriage return and linefeed. The format of a line of data when the Record
Statistics setting is OFF is as follows:
<measurement value>,<unit>,<channel number>,<date and time>
Example: 231.927562,C,4,2010-01-10 14:23:10
When RECORD STATISTICS is ON, the format is as follows:
<measurement value>,<unit>,<channel number>,<date and time>,<ratio>,<resistance>,<mean>,<std dev>
Example: 231.927562,C,4,2010-01-10 14:23:10,1.89280433,47.318163,231.927848,0.000231
USB files are written to a folder named “\159x\data” on the USB memory device and have the extension
“.txt”. If the file does not exist, it will be created. If the file already exists, new data will be appended to the
data already in the file. For data to be recorded to external memory, a Linux compatible USB memory device
formatted with a FAT32 file system must be inserted into the USB Connection on the front panel.
The following are the Recording Menu function keys.
5.7.3.4.1
RECORDING SETTINGS (F1)
MAIN MENU | MEASURE MENU | RECORDING MENU |
The Recording Settings function key opens a screen that allows the user to view and change settings related to
measurement recording. The configuration fields in the Recording Settings screen are as follows:
MEMORY DEVICE - allows the user to choose which memory device to be written to. The options are
Internal, USB or Both.
USB FILE - is a user-selectable file name to which data is stored on the USB memory device. Upon pressing
Enter, the Alpha-Numeric Interface opens allowing the user to input a file name. The file name extension “.txt”
is automatically appended to the file name.
RECORD STATISTICS - determines whether statistics data is recorded to the memory device along with the
measurement. Additional data recorded when Record Statistics is ON include Resistance Ratio, Resistance,
Statistical Mean, and Standard Deviation. When Record Statistics is ON, the capacity of the memory device,
in terms of number of measurements, is reduced by about a factor of two.
The function key used to Start and Stop Recording is located in the Measurement Menu, Section 5.6.10,
START/STOP RECORD (F5), on page 28.
5.7.3.4.2
VIEW DATA (F2)
MAIN MENU | MEASURE MENU | RECORDING MENU |
The View Data function key is used to view measurements that have been recorded into internal memory. The
View Data screen displays the list of datasets recorded in memory. The user pages through the datasets using
the Left/Right Arrow Keys and views data in a dataset using the Up/Down Arrow Keys.
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5.7.3.4.3
READ FILE (F3)
MAIN MENU | MEASURE MENU | RECORDING MENU |
The Read File function key allows the user to view measurements that have been recorded in a file on the USB
memory device. If a USB device has not been inserted in the front panel, the user will be prompted to do so.
A list of files appears on the screen and the user selects the file to be opened using the arrow keys and then
opens the file by pressing the ENTER key. When the file is opened, the contents are displayed and the arrow
keys are used to move through the file to view the data.
5.7.3.4.4
WRITE FILE (F4)
MAIN MENU | MEASURE MENU | RECORDING MENU |
The Write File function key is used to copy data from internal memory onto the USB memory device.
The user may select a dataset using the Left and Right arrow keys. ALL DATA (in the DATA SET field) can be
used to transfer all datasets to the USB device. The USB device filename can be entered by moving the cursor
to the USB FILE field and pressing the ENTER key to display the Alpha-Numeric Interface.
If the data set and filename have been selected, the user presses CONTINUE (F1) to start the transfer. If the
file already exists, the user will be prompted to continue and append the data to the existing file.
5.7.3.4.5
ERASE DATA (F5)
MAIN MENU | MEASURE MENU | RECORDING MENU |
The Erase Data function key is used to erase a selected data set or all data sets, using ALL DATA at the end of
the list, from internal memory. The user may select a data set using the Up/Down arrow keys and pressing the
ENTER key. Upon pressing CONTINUE (F1), a warning message will appear and the user must confirm the
action to continue. Pressing the EXIT key or CANCEL (F2) function key at any point during this process exits
the menu without deleting data.
Important: Do not turn power off while data is being erased because the internal memory files may be
lost.
5.7.3.5
ZERO-POWER MEASUREMENT (F5)
MAIN MENU | MEASURE MENU |
The Zero-Power function key is used for configuring and performing zero-power measurements.
Zero-Power Measurement Description
When measurement current is passed through a temperature probe sensor, the sensor self-heats and creates a
measurement error. Probe self-heating errors vary by probe construction, current levels, and ability of the measurement medium to dissipate heat from the probe. Measurements in air are especially prone to self-heating.
The Zero-Power Measurement function can be used to remove measurement error caused by self-heating. It
can also be used to measure the error due to self-heating.
The Zero-Power Measurement function automatically acquires the measurements necessary to determine a
probe’s zero-power resistance, temperature or ratio. This is done by measuring the probe at two levels of current (nominal current and 1.4142 times nominal) and then using these measurements to calculate the value at
zero-power.
While the Super-Thermometer is performing a zero-power measurement, the timing is set to produce a
measurement every two seconds and the digital filter is disabled. The statistical average is calculated from all
measurements acquired during the Measure Time.
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Tip: Zero-Power measurements must be performed in a very stable heat source so temperature drift does
not interfere with the calculation.
Zero-power measurement is performed by first measuring the probe at nominal current. Then the excitation current is automatically changed to 1.4142 times the nominal current. 1.4142x of the nominal current is
referred to as double power excitation current since the power dissipated is twice that of nominal current. The
zero-power value is then calculated with the following equation:
where is the zero-power value, is the nominal current value, and is the double-power value.
Important: The probe definition must be configured so that the Maximum Current setting is at least
1.4142x the nominal current setting.
An alternative method of zero-power measurement, enabled by the Repeat Nominal setting, adds an additional
nominal current measurement taken after the 1.414x reading. The zero-power value derived from this technique is calculated with the following:
where is the zero-power value, is the first nominal current value, is the double-power value, and is the final
nominal current value.
The difference between the first and final nominal current readings indicates whether the probe’s temperature
has changed during zero-power measurement. This is important since a change in temperature could introduce
error into the zero-power calculation. When Repeat Nominal is enabled, the Super-Thermometer reports the
difference between the two nominal current values as Drift.
When a zero-power measurement is completed, the results are displayed on the screen and written to memory.
The values displayed are Channel Number, Probe ID, Zero-Power Measurement, Sensing Current, Mean, and
Standard Deviation for each step and the Nominal Current Self-Heating Offset.
The configuration fields and function keys in the Zero-Power Measurement screen are as follows:
CHANNEL - specifies the channel on which the measurement will be done. Only one channel at a time can be
measured in zero-power mode.
SETTLE TIME - sets the time allowed for measurement settling after a change in current. The value (00:00)
is in minutes and seconds. The settle time needed varies by probe construction and measurement medium. The
default value is 01:00 (1 minute). Measurements taken during Settle Time are discarded.
Tip: Settle time is important since it takes some time for a probe’s temperature to stabilize when the
current level changes. Therefore, it is important to choose a settle time appropriate for the probe and the
measurement environment.
MEASURE TIME - sets the time period over which measurements are averaged for each portion of the zeropower sequence. For example, if a Measure Time of 1 minute is selected, measurements will be taken at each
current level over a 1 minute span and the resulting average will be used in the zero-power calculation. The
number of samples included in the average is based on the Measure Time and the Display Interval setting.
The Measure Time setting is in minutes and seconds. The setting has a range of 00:10 to 10:00. The default
value is 01:00.
REPEAT NOMINAL - enables or disables the Repeat Nominal option mentioned above. When enabled, the
nominal current measurement will be repeated after the 1.4142x measurement.
AUDIO INDICATION - enables or disables the Audio Alert feature that alerts the user when the zero-power
measurement sequence is completed.
START (F1) - starts the zero-power measurement sequence
When the START (F1) function key is selected, the zero-power measurement sequence begins and the screen
displays the following fields and function key:
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CHANNEL - the measurement channel
PROBE - the ID of the probe
TIME REMAINING - the amount of time left to complete the zero-power sequence of measurements in
minutes and seconds (00:00)
STEP - indicates the current measurement step of the sequence
SENSING CURRENT - the sensing current implemented in the measurement step
PHASE - indicates whether measurement is in SETTLING or MEASURING mode
MEAN - the arithmetic mean of the measurements taken in the current step
STD DEV - the standard deviation of the measurements used to calculate the mean
CANCEL (F1) - terminates the zero-power measurement sequence
Once the Zero-Power Measurement sequence is complete, the following results are reported on the screen.
DATE - the date of the measurement
TIME - the time when the measurement finished
CHANNEL - the channel measured
PROBE - the ID of the probe configuration
ZERO-POWER RESULT - the calculated zero-power value
SELF-HEATING - the amount the probe measurement changes due to self-heating
STANDARD ERROR - the resulting standard error of the mean of the zero-power result
DRIFT - indicates the difference between the nominal current measurements (applies only if Repeat Nominal
is enabled)
SENSING CURRENT 1 - the measurement current used in the first step of the sequence
MEAN 1 - the mean of the measurements in the first step
STD DEV 1 - the standard deviation of the measurements in the first step
SENSING CURRENT 2 - the measurement current used in the second step of the sequence
MEAN 2 - the mean of the measurements in the second step
STD DEV 2 - the standard deviation of the measurements in the second step
(the following apply if Repeat Nominal is enabled)
SENSING CURRENT 3 - the measurement current used in the third step of the sequence
MEAN 3 - the mean of the measurements in the third step
STD DEV 3 - the standard deviation of the measurements in the third step
The measurement results can be written to memory by pressing the WRITE FILE (F1) function key. The user
may change the file name by pressing the ENTER key and using the alpha-numeric interface. Once the file
name is set, and after the USB memory device is inserted into the front USB port, the user presses the CONTINUE (F1) function key to proceed to write the file. The file is stored in a folder named “\159x\zero”. If the
file already exists, the new test results are added to the file.
The results of the zero-power measurement are written to the file as follows:
DATE,<date>
TIME,<time>
CHAN,<channel number>
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1594A/1595A Super-Thermometer
Main Menu
PROBE,<probe ID>
ZERO_MEAS,<corrected measurement>,<unit>
SELF_HEAT,<self heating>,<unit>
STAN_ERR,<standard error>,<unit>
DRIFT,<drift>,<unit>
CURR_1,<current 1>,mA
MEAN_1,<mean 1>,<unit>
SDEV_1,<standard deviation 1>,<unit>
CURR_2,<current 2>,mA
MEAN_2,<mean 2>,<unit>
SDEV_2,<standard deviation 2>,<unit>
CURR_3,<current 3>,mA
MEAN_3,<mean 3>,<unit>
SDEV_3,<standard deviation 3>,<unit>
Note: DRIFT is recorded only if Repeat Nominal is enabled.
VIEW PREVIOUS (F2) - displays the most recent set of zero-power measurement data results
5.7.4 DISPLAY MENU (F4)
MAIN MENU |
Figure 14 Display Menu Screen
The Display Menu is used for configuring the display settings, selecting statistics settings and choosing the
displayed temperature measurement units.
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Main Menu
5.7.4.1
USER SETTINGS (F1)
MAIN MENU | DISPLAY MENU |
The User Settings screen allows the user to set preferences such as language, temperature measurement resolution, screen saver settings and alert messages.
The User Settings screen will automatically appear as the initial screen if the Start-up Help setting is enabled
(see below). This assists a first-time user in setting preferences and setting the clock to the local time. The User
Settings screen can also be conveniently reached directly from the Measurement Screen at any time by pressing and releasing the ENTER key and then pressing the SETUP key. When reached this way, it will appear in
English regardless of the language setting.
The following configuration fields are displayed in the User Settings screen.
LANGUAGE - sets the language in which the menus and screens are displayed. The options are ENGLISH,
CHINESE, JAPANESE, SPANISH, GERMAN, FRENCH, and RUSSIAN. ENGLISH is the default option.
DATE FORMAT - sets the format used to display dates on the screen. Available options are YYYY-MM-DD,
MM-DD-YYYY, and DD/MM/YYYY. The default format is YYYY-MM-DD. This setting has no effect on
communications commands and responses, recorded data, or library files.
DECIMAL FORMAT - sets the decimal character used in decimal numbers on the display. Available options
are period (.) and comma (,). The default option is (.). This setting has no effect on communications commands
and responses, recorded data, or library files.
TEMPERATURE RESOLUTION - sets the desired number of decimal places that appear in displayed temperature measurements. Available options are 0.1 through 0.000001. The default option is 0.00001. The actual
number of decimal places of displayed temperatures may be reduced for large numbers. This setting has no
effect on communications commands and responses, recorded data, or library files. The resolution of displayed
resistances and resistance ratios is fixed at the maximum practical resolution.
SCREEN SAVER ENABLE - enables or disables the screen saver. When the screen saver is enabled (ON),
the display backlight is switched off after the screen saver wait time specified by the Screen Saver Wait setting if no keys are pressed. Pressing any key resets the screen saver wait time and, if the display was blanked,
switches the display on. If Screen Saver Enable is OFF, the display will remain on indefinitely. Enabling the
screen saver saves power and extends the lifetime of the display. The default option is OFF.
SCREEN SAVER DELAY - sets the screen saver delay time. Available options are 5 min, 10 min, 15 min, 30
min, 45 min, 1 hr, and 2 hr. The default option is 1 hr. This setting is only relevant when Screen Saver Enable
is ON.
DISPLAY BRIGHTNESS - sets the brightness of the display backlight. Available options are 50 %, 60 %,
70 %, 80 %, 90 %, and 100 %. The default option is 100 %. Reducing the display brightness saves power and
extends the lifetime of the display. In brightly lit environments, the screen may be easier to read when Display
Brightness is set to a higher value.
ITS-90 SUBRANGE ALERT - enables (ON) or disables (OFF) the alert message that appears at the bottom
of the Measurement screen when a temperature measurement from a probe using the ITS-90 Conversion is
more than 10°C outside the range covered by the selected subranges. The default option is ON.
Rs DUE ALERT - enables (ON) or disables (OFF) the alert message that appears at the bottom of the Main
Screen when the due date of a resistor in the Resistor Library is past. The default option is OFF.
ALERT BEEP - enables (ON) or disables (OFF) the audio indication that accompanies alert messages. The
default option is ON.
KEYPAD BEEP - enables (ON) or disables (OFF) the audio indication that accompanies each key-press. The
default option is ON.
START-UP HELP - determines whether the User Settings screen appears automatically after power-on.
When set to ON, the User Settings screen will appear as the first screen. If the setting is OFF the Measurement
Screen will appear instead. The default option is ON.
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1594A/1595A Super-Thermometer
Main Menu
When the User Settings screen appears after power-on, when the Start-Up Help setting is ON, the User Settings screen includes function key NEXT (F1). This key leads to the Time and Date Settings screen (see Section 5.7.5.1, TIME DATE (F1), on page 50), where the clock may be set to the local time.
5.7.4.2
FIELD SETTINGS (F2)
MAIN MENU | DISPLAY MENU |
The Field Settings function key is used for selecting statistical fields to display in the Measurement Screen. A
particular set of statistical fields can be stored as a set and recalled using the RECALL MEMORY selection.
Four different sets can be stored in Recall Memory, any of which can be restored to factory defaults using the
RESTORE DEFAULT (F1) function key (see Default Statistical Fields table below). Restore Default only affects the Recall Memory selection that is currently display.
Individual statistical fields in any of the Recall Memory sets can be changed by first selecting the RECALL
MEMORY set number, pressing the ENTER key, arrowing down to the field to be changed, changing the field
with the Left/Right arrow keys and pressing the ENTER key save the change. The available data field options
and their descriptions are listed in the tables below.
Table 15 Default Statistical Fields
Field
Memory 1
Memory 2
Memory 3
Memory 4
1
MEAN
MEAN
MAXIMUM
MEAN
2
STD DEV
STD DEV
MINIMUM
STD DEV
3
SE OF MEAN
N
DELTA
TIME
4
RESISTANCE
RESISTANCE
RESISTANCE
DATE
Table 16 Statistical Field Descriptions
Option
Description
Equation
MEAN
arithmetic mean of measurements
Mean =
STD DEV
sample standard deviation of measurements
Std Dev =
SE OF MEAN
standard error (estimated standard deviation) of the
mean
SE of Mean =
MAXIMUM
maximum measurement
MINIMUM
minimum measurement
SPREAD
difference between maximum and minimum
N
number of measurements (sample size)
DELTA
difference relative to a delta channel or offset
RESISTANCE
resistance measurement
RATIO
resistance ratio measurement
TIME
time from the system clock
DATE
date from the system clock
1 n
∑ yi
n i =1

1  n 2
yi − n • Mean 2 
∑


n − 1  i =1
( std dev)
n
Spread = Maximum − Minimum
As a note of further explanation, SE OF MEAN provides an estimate of the uncertainty (k = 1) of the MEAN
value. SE OF MEAN is calculated from the sample standard deviation of unfiltered measurements (not the
same as the displayed standard deviation of filtered measurements) and the sample size. The method used to
calculate SE OF MEAN disregards the effect of the digital filter since it causes correlation among displayed
measurements. Otherwise the result of the formula for SE OF MEAN would produce an erroneously low
value.
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Main Menu
5.7.4.3
STATISTICS SETTINGS (F3)
MAIN MENU | DISPLAY MENU |
The Statistics Settings screen allows the user to set statistics related settings such as the statistics mode to be
used.
STATISTICS MODE – determines the mode in which statistics are used. The options are LIMITED and
UNLIMITED.
In Limited mode, statistics are calculated using a sliding window that is limited in width by the number of
samples defined in the Sample Count setting. The oldest measurement leaves the sliding window buffer when
a new measurement enters.
Unlimited mode allows the number of samples to grow indefinitely until the user resets the statistics or stops
measurement.
SAMPLE COUNT - defines the number of samples on which the statistics are based. In LIMITED mode, this
setting defines the width of the sliding window. A maximum of 100 can be selected.
DELTA MODE - determines whether the Delta statistics field is based on a measurement from a channel or an
offset entered by the user. The options are CHANNEL or OFFSET.
DELTA OFFSET - sets the offset value used for calculating Delta. This setting applies when Delta Mode is
set to OFFSET.
When the Delta Offset value is subtracted from a measurement, it assumes the same units as the measurement.
The setting has a range of -1.0E06 to 1.0E06.
Tip: Delta Mode is useful for automatically subtracting an offset from a measurement such as the lead
resistance offset used when making 3-wire measurements.
DELTA CHANNEL- specifies the channel to be used as the reference for the Delta calculation. This setting is
applicable when Delta Mode is set to CHANNEL. Possible options are channels 1 through 4 when no scanner
is attached. If a scanner is attached, channel 1 is not available but the scanner channels are.
5.7.4.4
GRAPH SETTINGS (F4)
MAIN MENU | DISPLAY MENU |
The Graph Settings function key opens a screen that contains settings for controlling how data graphs appear
in the Measurement Screen in Show Graph mode. The configuration fields in the Graph Settings screen are as
follows:
COMBINED GRAPH - determines if all enabled channels are plotted on the same graph or on separate
graphs. ON plots all channels on the same graph.
TIME SPAN - configures the horizontal time scale or width of the graph window. The options are 5 min, 10
min, 15 min, 30 min, 1 hr, 2 hr, 4 hr, and 8 hr. The default is 10 min.
AUTOMATIC CENTERING - determines whether the center of the vertical axis is set automatically based
on the data in the graph (ON) or if the center is fixed at the Vertical Center value (OFF). The default value is
ON.
VERTICAL CENTER - sets the center of the vertical axis of the combined graph when Automatic Centering
is ON. The setting has a range of -1.0E6 to 1.0E6. The default value is 0.0.
AUTOMATIC SCALING - determines whether the scale of the vertical axis is set automatically based on the
data in the graph (ON) or if the scale is fixed at the Vertical Scale value (OFF). The default value is ON.
VERTICAL SPAN - sets the scale of the vertical axis of the combined graph when Automatic Scaling is OFF.
The setting has a range of 1.0E-6 to 1.0E6. The default value is 0.1.
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TRACE - controls whether a measurement point is plotted with a line that connects to the previous point or as
a separate dot. The options are LINE and DOT. The default value is DOT.
Important: When Time Span is large, multiple points may be combined and drawn as a vertical line to
conserve memory.
5.7.4.5
TEMPERATURE UNIT (F5)
MAIN MENU | DISPLAY MENU |
The Temperature Unit screen allows the user to select the unit for displayed temperature measurements. The
options are °C, K, and °F. °F will not be available if SI Unit Lock is set to ON in the Calibration Parameters
screen of the Calibration menu (see Section 5.7.7.2, CALIBRATION (F5), on page 55). The default value is
°C.
5.7.5 SYSTEM MENU (F5)
MAIN MENU |
Figure 15 System Menu Screen
The System Menu contains general system settings such as time and date, remote interface, password, and
calibration.
The System Menu screen displays the following product information: Manufacturer, Model, Serial Number,
Firmware Version, and Calibration Date.
The following are the System Menu function keys:
5.7.5.1
TIME DATE (F1)
MAIN MENU | SYSTEM MENU |
The Time and Date function key allows the user to enter the system Time and Date using the following fields:
TIME - time of the system clock. It is always in 24-hour format.
DATE - date of the system clock. It appears in the format determined by the Date Format setting (see Section
5.7.4.1, USER SETTINGS (F1), on page 47).
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DAYLIGHT SAVING - determines whether the clock is automatically adjusted at the beginning and end of
the Daylight Saving period. Options are OFF, NORTH AMERICA, and EUROPE. The default option is OFF.
5.7.5.2
REMOTE INTERFACE (F2)
MAIN MENU | SYSTEM MENU |
The Remote Interface screen contains the function keys used for configuring and monitoring the remote interface ports. For more information on the Remote Interface ports and a list of remote operation commands, see
Section 8, Remote Operation, on page 65.
The following are the function keys located in the Remote Interface menu.
5.7.5.2.1
SERIAL (F1)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The Serial function key is used to configure the RS-232 serial port with the following configuration fields:
BAUD RATE - baud rate setting of the serial port. It may be set to 1200, 2400, 4800, 9600, 19200, or 38400.
The default setting is 9600.
LINEFEED - determines whether a linefeed character (ASCII code 10) is transmitted at the end of every
message.
5.7.5.2.2
USB (F2)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The USB function key displays the following configuration field:
PORT ENABLE – enables and disables the rear USB port for remote communications with a computer (The
front USB port, used for an external USB memory device, is always enabled).
5.7.5.2.3
NETWORK (F3)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The Network function key opens a screen allowing the user to configure the Network port settings.
The network port implements a 10/100 Base T Ethernet network interface. It supports the protocols TCP/IP,
DHCP, and HTML. The port is disabled by default and must be enabled to be used. The user may select DHCP
or specify a static network address.
The network port may be used for remote control of the Super-Thermometer by a PC and interface to network
software such as Telnet or a COM port redirector driver. In this mode, the network port accepts a raw TCP
connection on TCP port number 5025.
The network port also provides a simple HTML web page interface to the Super-Thermometer to allow remote
monitoring via a web browser.
The following are the configuration fields:
HARDWARE MAC - shows the hardware MAC address of the network port. It cannot be changed.
DHCP ENABLE - determines whether the static IP address is used or is assigned dynamically by a server.
The default option is ON (dynamic).
CAUTION: When DHCP is enabled, do not remove the Ethernet cable and turn the power off. The cable
needs to remain plugged into the unit while cycling the power.
IP ADDRESS - specifies the network port’s IP address when DHCP is OFF, or shows the dynamically assigned IP address when DHCP is set to ON.
GATEWAY - specifies the gateway server’s IP address to be used when DHCP is OFF.,
51
1594A/1595A Super-Thermometer
Main Menu
SUBNET MASK - specifies the network’s subnet mask when DHCP is OFF. Gateway and Subnet Mask are
not available when DHCP is set to ON.
HOST NAME - is a name that may be used to identify the Super-Thermometer on the network. It may consist
of a combination of letters and digits, up to 16 characters in length. The first character must be a letter. Hyphen
characters are allowed within the Host Name string. The default Host Name is “F159X-<serial number>”,
where <serial number> is the unique serial number of the Super-Thermometer.
CONTROL ENABLE - determines whether remote interface commands are accepted via the network port.
The options for this setting are OFF, ON, and QUERY ONLY. When the setting is OFF, the Super-Thermometer will not accept or respond to any commands received from the network port. When the option is ON all
commands are allowed, though some may be password protected. The QUERY ONLY option allows data and
settings to be read but not changed. The default is ON.
Important: When Control Enable is either OFF or QUERY ONLY, the web page will not be fully
functional.
5.7.5.2.4
IEEE-488 (F4)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The IEEE-488 function key opens the IEEE-488 configuration screen with the following configuration fields:
PORT ENABLE - determines whether the IEEE-488 port is enabled (ON). When the port is disabled, no
communications can occur. The default option is OFF.
ADDRESS - is the IEEE-488 address assigned to the Super-Thermometer. It must be different than all other
equipment on the IEEE-488 bus. The address may be set to any number between 1 and 30 inclusive. The
default setting is 22.
TERMINATION - determines whether a carriage return character (ASCII code 13) or linefeed character
(ASCII code 10) terminates a response. The default option is LINEFEED. An IEEE-488 EOI message also accompanies the final character of every transmission.
The IEEE-488 port accepts either, or any combination of, a linefeed, carriage return, or EOI as a terminator.
The CLEAR INTERFACE (F1) function key is used to clear the input and output buffers and reset the IEEE488 interface, just as if the IFC or SDC control message was received.
5.7.5.2.5
ERRORS (F5)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The Errors screen allows the user to view errors stored in the remote interface error queue. They can also be
read using the remot command “SYST:ERR?” (see Section 8, Remote Operation, on page 65)
The screen shows a list of all the errors, with the earliest error at the top. Errors are identified with their queue
position number, error code, and message string. The error queue can hold up to ten errors. If the queue overflows with errors, the last error is replaced with a “Queue overflow” error message.
The Errors screen contains the CLEAR ERRORS (F1) function key that, when pressed, clears all errors from
the error queue.
5.7.5.3
CONFIG (F3)
MAIN MENU | SYSTEM MENU |
The Configuration screen provides the means for storing the instrument configuration and recalling it later.
Several different configurations may be stored to allow quick and easy setup from user to user or from one application to another. The following function keys are located in this screen.
52
Menus and Screens
Main Menu
5.7.5.3.1
STORE CONFIG (F1)
MAIN MENU | SYSTEM MENU | CONFIG |
The Store Configuration function allows the user to store settings to a configuration file in either internal nonvolatile memory or a USB flash memory device. The following settings are stored:
●●
●●
●●
●●
●●
●●
●●
●●
●●
The probe definition assigned to each channel
Enable state of each channel
Channel settings, including the reference resistor selections
Resistor definition assigned to each reference resistor input
Scan settings
Timing settings
Digital filter settings
User Settings
Statistics fields settings
Statistics settings
●● Graph settings
●● Temperature unit
●● Recording settings
The Store Configuration function does not store probe definitions, resistor definitions, time and date, remote
interface port settings, password settings, calibration parameters, or recorded data.
●●
MEMORY DEVICE - specifies to which memory device the configuration is stored. The options are USB
and INTERNAL. The default option is INTERNAL. Up to 50 configuration files may be stored internally. The
number of files stored on a USB device is limited only by the storage space available.
FILE NAME - specifies the name of the configuration file. It is edited or entered by first pressing the ENTER
key, which opens the Alpha-Numeric Interface. The file name may have up to 24 characters. The user must
press the SAVE (F3) function key when finished. If the file does not exist, it is created. If it already exists, the
contents of the file are replaced. The file name extension “.txt” is automatically added to the file name when
the file is created. Once the memory device and file name are selected, the user presses the STORE (F1) function key to proceed.
USB configuration files are written to a folder named “\159x\config” on the USB memory device and have the
extension “.txt”. When writing the file to a USB memory device, a formatted USB memory device must be
inserted into the USB socket on the front panel.
5.7.6 RECALL CONFIG (F2)
MAIN MENU | SYSTEM MENU | CONFIG |
The Recall Configuration screen displays the configuration files that have been saved to memory. The location
of the file(s) must be selected using the MEMORY DEVICE field. The options are INTERNAL and USB.
Once the memory location is selected, pressing ENTER or the CONTINUE (F1) function key will open the
list of configuration files. Using the Up/Down arrow keys, the configuration is selected. Pressing ENTER or
the CONTINUE (F1) function key opens the file. The user is prompted to continue before the changes are
implemented.
The Recall Configuration function does not affect probe definitions, resistor definitions, time and date, remote
interface port settings, password settings, calibration parameters, or recorded data. If an assigned probe definition no longer exists in the Probe Library when a configuration is recalled, the channel is set to UNDEFINED.
Likewise, a reference resistor input will be set to VARIABLE if the resistor ID is not found in the Resistor
Library.
53
1594A/1595A Super-Thermometer
Main Menu
5.7.7 DELETE CONFIG (F3)
MAIN MENU | SYSTEM MENU | CONFIG |
The Delete Configuration function may be used to delete a configuration file in internal memory. The screen
shows a list of configuration files found in the internal non-volatile memory. The user presses the Up/Down
arrow keys to select one of the configuration files, then CONTINUE (F1) or ENTER to delete the file. The use
must confirm the action before the configuration is deleted.
5.7.7.3.1
RESTORE DEFAULT (F4)
MAIN MENU | SYSTEM MENU | CONFIG |
The Restore Default function may be used to restore settings to factory default values. The user must press the
YES (F4) function key to run the restore function. The NO (F5) function key or EXIT key will exit the screen
without restoring default settings. The settings that are affected are listed in the Store Configuration section.
5.7.7.3.2
UPDATE FIRMWARE (F5)
MAIN MENU | SYSTEM MENU | CONFIG |
The Update Firmware function key may be used to update the internal software to a newer version when available from the manufacturer.
The Update Firmware function is always password protected. The user will be prompted to enter the correct
password to proceed.
A message appears instructing the user to plug in a USB memory device that contains the firmware update file.
A confirmation message screen appears prompting the user to press YES to proceed. While the firmware
update file is being read from the USB and loaded into the system, the power must not be switched off. If the
power is switched off during the firmware update process, the instrument may no longer operate and will need
to be returned to the factory for servicing.
Caution: Do not switch off the power while the firmware is being updated.
Once the firmware update process is completed, a message indicates that the firmware has been successfully
updated. The user must then switch the power off and then on to restart and operate with the new firmware.
5.7.7.1
PASSWORD (F4)
MAIN MENU | SYSTEM MENU |
In the Password screen the user may view and change password settings. The Password screen is always
password protected (the default is 1234). The user will be prompted to enter the correct password to access the
screen. Password protection can be enabled for probe configurations, resistor definitions, certain measure functions, and system time/date settings. See the following configuration field descriptions for more detail.
PASSWORD - a four-digit number that must be entered by the user in order to change settings in any password protected screen. The user may change the password to any four-digit number. The default is 1234.
Important: The user must be sure to remember the password or record the password in a safe location.
If the password is forgotten or lost, the instrument must be returned to the factory to have the password
reset.
PROBE PROTECTION - enables or disables protection of probe definition related screens. This setting is
useful for ensuring that probe definitions in the Probe Library do not get inadvertently changed. The default is
OFF.
54
Menus and Screens
Main Menu
RESISTOR PROTECTION - enables or disables protection of resistor definition related screens. This setting
is useful for ensuring that resistor definitions in the Resistor Library do not get inadvertently changed. The
default is OFF.
MEASURE PROTECTION- enables or disables protection of measurement setting screens. This setting is
used for ensuring that timing and digital filter settings do not get inadvertently changed, possibly resulting in
noisy or less accurate measurements. The default is OFF.
TIME/DATE PROTECTION- enables or disables protection of the Time and Date setting screen. The default is OFF.
Some screens are always protected and have no associated protection setting. An example is the Calibration
Parameters screen, which always requires the correct password before any of the settings can be changed.
5.7.7.2
CALIBRATION (F5)
MAIN MENU | SYSTEM MENU |
The Calibration menu contains functions and settings for testing and maintaining proper performance of the
Super-Thermometer. Refer to Section 9, Calibration, on page 103 for test and calibration instructions.
The following are the Calibration Menu function keys.
5.7.7.2.1
SYSTEM TEST (F1)
MAIN MENU | SYSTEM MENU | CALIBRATION |
The System Test function key is used to perform a system self-test. This tests various components of the
Super-Thermometer and reports the results. If System Test indicates failures, contact the nearest Fluke Authorized Service Center. See Section 9.2, SYSTEM TEST (F1), on page 103 for more information.
5.7.7.2.2
CURRENT TEST (F2)
MAIN MENU | SYSTEM MENU | CALIBRATION |
The Current Test function allows the user to test the accuracy of the sensing current on the front panel input
channels.
See Section 9.3, CURRENT TEST (F2), on page 103 for more information on how to perform a current test.
5.7.7.2.3
RATIO CALIBRATION (F3)
MAIN MENU | SYSTEM MENU | CALIBRATION |
The Ratio Self-Calibration function allows the user to perform a ratio linearity check or calibration. A check
allows the user to verify ratio accuracy without making changes to ratio parameters. Calibration measures the
Super-Thermometer ratios and makes adjustments to the ratio parameters. A check should always be performed after running the ratio self-calibration function to verify that alignment was successful. See Section
9.4, RATIO CALIBRATION (F3), on page 104 for more information.
5.7.7.2.4
RESISTANCE CALIBRATION (F4)
MAIN MENU | SYSTEM MENU | CALIBRATION |
The Resistance Calibration function allows the user to test and calibrate the internal reference resistors. See
Section 9.5, RESISTANCE CALIBRATION (F4), on page 106 for more information.
5.7.7.2.5
CALIBRATION PARAMETERS (F5)
MAIN MENU | SYSTEM MENU | CALIBRATION |
Important: Calibration parameters should not be changed except as part of the Super-Thermometer
calibration procedure performed by a qualified service technician.
55
1594A/1595A Super-Thermometer
Main Menu
In the Calibration Parameters screen the user may view and change measurement calibration settings. The
calibration parameters can be viewed with no password but a password is required to make changes.
Calibration parameters include calibrated values for each of the internal resistors and the linearity coefficients
for the resistance ratio measurements. Since the accuracy of the Super-Thermometer depends on these values,
they must be accurate. Refer to Section 9.4.2, ADJUST PARAMETERS (F2), on page 106 for instructions
needed to adjust the calibration parameters.
Apart from the calibration parameters, the Calibration Parameters screen also includes the following configuration fields:
CALIBRATION DATE- used to record the date the Super-Thermometer is calibrated.
SI UNIT LOCK- enables or disables °F as an allowed temperature unit option. When this is set to ON, temperatures may be displayed in units of °C and K only, and °F will not be available as an option for the Unit
setting (see Section 5.7.4.5, TEMPERATURE UNIT (F5), on page 50).
56
Getting Started
User Settings Screen
6 Getting Started
6.1 Powering on the Super-Thermometer
CAUTION: Before powering the Super-Thermometer on, ensure that the line voltage selection is set
properly. Refer to Section 3.3, Line Voltage and Fuses, on page 15 for instructions.
Power the Super-Thermometer on by setting the power switch located on the back panel to the On position.
After power is on, pressing the Power Standby switch on the front panel puts the system into hibernation, leaving key components such as the resistor oven powered on.
The first time the unit is powered on, the User Settings screen will be displayed after startup. Later in the section it will be explained how this feature is turned off so the Measurement screen is displayed when the unit is
powered on.
6.2 User Settings Screen
The User Settings screen allows the user to configure system settings such as language, temperature measurement resolution, screen saver settings and alarms. As mentioned previously, the User Settings screen is the first
displayed upon the first power-up if the Start-Up Help setting is enabled. This setting can be turned off by the
user after the user settings have been configured.
The following fields are displayed in the User Settings screen:
LANGUAGE- sets the language in which the menus and screens are displayed. The options are ENGLISH,
CHINESE, JAPANESE,SPANISH, GERMAN, FRENCH, and RUSSIAN. ENGLISH is the default option.
DATE FORMAT- sets the format used to display dates on the screen. Available options are YYYY-MM-DD,
MM-DD-YYYY, and DD/MM/YYYY. The default option is YYYY-MM-DD. This setting has no effect on
communications commands and responses, recorded data, or library files.
DECIMAL FORMAT- sets the decimal character used in decimal numbers on the display. Available options
are period (.) and comma (,). The default option is (.). This setting has no effect on communications commands
and responses, recorded data, or library files.
TEMPERATURE RESOLUTION- sets the desired number of decimal places that appear in displayed temperature measurements. Available options are 0.1 through 0.000001. The default option is 0.00001. The actual
number of decimal places of displayed temperatures may be reduced for large numbers. This setting has no
effect on communications commands and responses, recorded data, or library files. The resolution of displayed
resistances and resistance ratios is fixed at the maximum practical resolution.
SCREEN SAVER ENABLE- enables or disables the screen saver. If Screen Saver Enable is OFF, the display
will remain on indefinitely. Enabling the screen saver saves power and extends the lifetime of the display. The
default option is OFF.
SCREEN SAVER DELAY- sets the screen saver delay time. Available options are 5 min, 10 min, 15 min, 30
min, 45 min, 1 hr, and 2 hr. The default option is 1 hr.
DISPLAY BRIGHTNESS- sets the brightness of the display backlight. Available options are 50 %, 60 %,
70 %, 80 %, 90 %, and 100 %. The default option is 100 %. Reducing the display brightness saves power and
extends the lifetime of the display.
ITS-90 SUBRANGE ALERT- enables (ON) or disables (OFF) the warning message that appears at the bottom of the Measurement Screen when a probe’s measured temperature exceeds its ITS-90 subrange by more
than 10°C. The default option is ON.
Rs DUE ALERT- enables (ON) or disables (OFF) the warning message that appears at the bottom of the Measurement screen when the due date of a resistor in the Resistor Library has expired. The default option is OFF.
ALERT BEEP- enables (ON) or disables (OFF) the audio indication that accompanies warning messages.
The default option is ON.
57
1594A/1595A Super-Thermometer
Connecting a Probe or Resistor
KEYPAD BEEP- enables (ON) or disables (OFF) the audio indication that accompanies each key-press. The
default option is ON.
START-UP HELP- determines whether the User Settings screen appears automatically after power-on. When
the settings is ON the User Settings screen will appear every time the power is switched on. If the setting is
OFF the Measurement screen will appear instead. The default option is ON.
NOTE: The following apply after power-on when Start-Up Help is on:
Pressing the NEXT (F1) function key continues to the Time and Date screen allowing the user to enter the
system Time, Date and Daylight Saving settings with the following configuration fields:
TIME- is the time of the system clock. It is always in 24-hour format.
DATE- is the date of the system clock. It appears in the format determined by the Date Format setting (see
Section 6.2, User Settings Screen, on page 57).
DAYLIGHT SAVING- determines whether the system clock is automatically adjusted at the beginning and
end of the Daylight Saving period. Options are OFF, NORTH AMERICA, and EUROPE.
The user settings sequence is completed by selecting the NEXT (F1) function key at which point the user is
prompted to allow the user settings screen to be displayed upon power-up. After making the selection, the
Channel Setup screen is shown to help the user set up a measurement.
6.3 Connecting a Probe or Resistor
CAUTION: Incorrect sensing current can damage a probe or resistor. Before connecting a device to the
Super-Thermometer ensure that the sensing current setting does not exceed the limit of the device.
Figure 16 Input Wiring
The Super-Thermometer measurement inputs are equipped with patented gold-plated DWF connectors. These
connectors are spring-loaded to provide constant contact pressure with measurement connections and they
require little maintenance.
The DWF connectors are designed to accept spade connectors (by pressing the connector open), bare wire
(inserted in one of the side holes while pressing the connector open), and banana jacks (inserted in the front).
For best results, always use wires and connectors that are clean and free of corrosion and oxidation.
58
Getting Started
Connecting a Probe or Resistor
The DWF connectors are labeled with C1, C2 (current connections) and P1, P2 (measurement potential connections). The guard connector is labeled with a “G” and is used for connecting to a probe or resistor guard or
shield. The guard connection may help reduce measurement noise.
Connect a probe or resistor, as specified by the device’s manufacturer, to any one of the four measurement
channels located on the front panel. To prevent the possibility of applying too much current, suspend measurement sampling and configure the channel before making the connection.
59
Making Measurements
Measuring a Temperature Probe
7 Making Measurements
7.1 Introduction
The Super-Thermometer has been designed to allow quick and easy measurement setup while providing flexible measurement options. The purpose of this section is to guide the user through the configuration of the
Super-Thermometer for typical measurements.
7.2 Measuring a Temperature Probe
The following instructions apply to the setup of both PRTs and thermistors for temperature measurement.
1. Press and hold the EXIT key to go to the Measurement screen.
2. If necessary, suspend measurement by pressing the STOP MEASUREMENT (F1) function key.
3. Using the instructions in the Getting Started section, connect a temperature probe to one of the
measurement input channels.
4. Press the SETUP key to open the Channel Setup screen. Use the Up/Down arrow keys to highlight
the channel to which the probe is connected. Scanner channels, if available, are identified with a S1
(scanner 1) or S2 (scanner 2) prefix added to the channel number.
5. Once the channel is highlighted, use the following steps to assign a probe definition to the selected
channel.
a. Select the ASSIGN PROBE (F1) function key to open the Probe Library.
b. Scroll through the list of probe definitions using the Up/Down arrow keys to locate the probe’s
definition. If the probe definition has not been previously entered, select ADD PROBE (F1)
to begin the process of creating a probe definition (see Section 5.7.2, PROBE MENU (F2), on
page 34 for more information).
c. When the probe definition is selected, press the ENTER key to assign the selected probe
definition to the channel and return to the Channel Setup menu.
6. Select the CHANNEL SETTINGS (F2) function key to configure the measurement channel using the
following steps:
a. Select the desired reference resistor (Rs) to be used for the measurement by pressing the Left/
Right arrow keys and pressing ENTER to confirm the selection. Use “Table 17 Recommended
Reference Resistors and Sensing Current” on page 62 as a guide for the selection.
b. Enter the correct sensing current using Table 17 on page 62 or the probe manufacturer’s
instructions as a guide.
c. Determine whether standby current (see Channel Setup section) is to be On or Off.
d. Select the desired measurement calculation. The options are RESISTANCE (to output the
probe’s resistance only), RATIO (to output the ratio of the probe’s resistance versus the
reference resistor), and TEMPERATURE (only if calibration coefficients were entered in the
probe definition).
e. Press the EXIT key to move back to the Channel Setup screen.
61
1594A/1595A Super-Thermometer
Scanning Multiple Temperature Probes
7. If the desired measurement channel is set to Off, use the ON/OFF (F3) function key to toggle the
channel to On. Pressing the Channel Select key located above the channel connection will also set the
channel to On.
8. Press the EXIT key twice (or press and hold the EXIT key) to go to the Measurement screen.
9. In the Measurement screen, select the START MEASURE (F1) function key to start measurement
sampling.
Table 17 Recommended Reference Resistors and Sensing Current
Probe Type
Reference Resistance
Sensing Current
25 Ω SPRT
25 Ω
1.0 mA
100 Ω PRT or RTD
100 Ω
1.0 mA
2.5 Ω SPRT
10 Ω
5.0 mA
0.25 Ω SPRT
1Ω
14.14 mA
1000 Ω PRT or RTD
10 kΩ
0.05 mA
Thermistors, 2 kΩ to 10 kΩ
10 kΩ
0.01 mA
7.3 Scanning Multiple Temperature Probes
Use the following instructions to configure the Super-Thermometer for scanning multiple temperature probes.
1. Follow the steps in the previous section “Measuring a Temperature Probe” to connect and configure two
or more temperature probes.
2. Press the MENU key to open the Main Menu screen.
3. Select the MEASURE MENU (F3) function key to open the Measure menu.
4. Select the SCAN SETTINGS (F1) function key.
5. Set SCAN ENABLE to On. If needed, configure the other scan settings.
6. Press the SETUP key.
7. In the Channel Setup screen, ensure that each channel to which a probe is connected is enabled (set to
ON). Disable all other channels by setting them to Off. An alternative method is to press the channel
select key above each channel to enable or disable the channel in the scan sequence.
8. Press and hold the EXIT key to return to the Measurement screen.
9. Begin scanning by selecting the START MEASUREMENT (F1) function key.
7.4 Measuring Resistance Ratio
The ratio measurement is the fundamental measurement from which the resistance and temperature measurements are derived. It is simply the ratio (Rx/Rs) between an unknown resistance (Rx) and a reference resistor
(Rs).
To configure the Super-Thermometer for ratio measurement, follow the steps listed in section 5.2 except select
RATIO in step 6.d.
7.5 Configuring an External Reference Resistor
The Super-Thermometer is equipped with a set of internal resistors. If needed, up to four external resistors can
be connected using Rs1 and Rs2 inputs on the back panel and Ch2 and Ch4 inputs on the front panel. Use the
following instructions for connecting and measuring with an external resistor:
1. Suspend measurement by going to the Measurement screen and pressing the STOP MEASUREMENT
(F1) function key.
2. Connect a reference resistor using one of the Rs inputs. Ensure the current and potential connections are
correct.
3. Go to the Add Resistor screen by using the following steps:
a. Press the SETUP key to open the Channel Setup screen.
b. Select the CHANNEL SETTINGS (F2) function key.
62
Making Measurements
Making A Zero-Power Measurement
c. Select the SETUP RS (F1) function key.
d. Select the DEFINE RESISTOR (F2) function key.
e. Select the ADD RESISTOR (F1) function key.
4. Enter a unique ID in the ID field. Pressing the ENTER key will open the Alpha-Numeric Interface for
text entry.
5. Enter the resistance value of the resistor in the RESISTANCE VALUE field.
Caution: The Resistance Value field is used in measurement for the calculation of the Rx resistance.
Entering this value incorrectly will cause measurement error.
6. Set the maximum measurement current allowed for the reference resistor.
7. If necessary, enter the calibration date and due date for the external reference resistor. The SuperThermometer will use the due date to warn the user when the resistor is due for calibration.
8. Select the SAVE (F1) function key to save the definition.
9. Press the EXIT key to go up one menu to the Set Up Rs screen. Use the Up/Down arrow keys to
highlight the Rs input to which the external resistor is connected.
10. Select the ASSIGN RESISTOR (F1) function key to open a list of defined reference resistors. Use the
Up/Down arrow keys to highlight the resistor’s definition. Press the ENTER key to assign the resistor to
the selected Rs input.
11. Now, when selecting the reference resistor in Section 7.2, Measuring a Temperature Probe, on page
61, step 6.a, the newly entered external resistor will appear as an option.
7.6 Making A Zero-Power Measurement
A temperature probe self-heats when measurement current is passed through its sensing element. Typically
self-heating will cause measurement error. The Super-Thermometer Zero-Power function allows the user to
measure how much a probe self-heats. It is also able to automatically measure a probe at zero-power. Use the
following instructions for performing a zero-power measurement:
1. Press and hold the EXIT key to go to the Measurement screen.
2. If necessary, suspend measurement by pressing the STOP MEASUREMENT (F1) function key.
3. Using the instructions in the Getting Started section, connect a temperature probe to one of the
measurement input channels.
4. Configure the probe definition ensuring that the MAXIMUM CURRENT field is set to a value equal to
or greater than 1.4142 times the nominal current value.
5. Open the ZERO-POWER MEASUREMENT screen by pressing the MENU key, then the MEASURE
MENU (F3) function key, followed by the ZERO-POWER MEASUREMENT (F5) function key.
6. In the Zero-Power Measurement screen, set CHANNEL to the channel where the probe is connected.
7. Set the SETTLE TIME field to a sufficient time period to allow the probe to self-heat and stabilize after
current is applied. For most probes 1 minute is sufficient.
8. Set the MEASURE TIME field to a time span that allows a sufficient number of samples to be taken.
For example, with a 2-second sample period and 2-second Display Interval, a 1-minute Measurement
Time will yield 30 samples.
9. If necessary, use REPEAT NOMINAL to set the Super-Thermometer to repeat nominal current
measurement after the 1.4142X step is complete. The difference between the beginning and ending
nominal current values will indicate if the probe was sufficiently equilibrated during zero-power
measurement.
10. When ready, press the START (F1) function key to start the zero-power sequence of measurements.
11. When the measurements are complete, the results are displayed on the screen.
63
Remote Operation
Configuring the Network (LAN) Port
8 Remote Operation
8.1 Introduction
This section contains instructions for controlling the Super-Thermometer remotely through the available remote operation ports. See Table 18 for a list of the available remote operation ports.
The remote operation commands listed at the end of this section are applicable with all of the remote operation
ports.
Table 18 Remote Operation Ports
Connection
Description
Ethernet connector that allows connection to a
network for controlling the instrument and transmitting
measurements
USB port that allows the instrument to be controlled as a
USB peripheral from a computer
9-pin subminiature D type serial port that can be used to
control the instrument via RS-232
IEEE-488 Input/Output that is compatible with IEEE488 interface and the IEC 625 Bus for controlling the
instrument
8.2 Configuring the Network (LAN) Port
The LAN (Local Area Network) port allows the Super-Thermometer to be controlled remotely through a
traditional Ethernet IP network. With this port, the user may control the Super-Thermometer remotely using
the commands listed at the end of this section. In addition, once the port is configured properly, the SuperThermometer can be accessed with the Super-Thermometer Interface web application on a PC.
The LAN port implements a 10/100 Base T Ethernet network interface. It supports the protocols TCP/IP,
DHCP, and HTML. The port is disabled by default and must be enabled to be used. The user may select DHCP
or specify a fixed network address.
The network port may be used for remote control of the Super-Thermometer by a PC and interface to network
software such as Telnet or a COM port redirector driver. In this mode, the network port accepts a raw TCP
connection on TCP port number 5025.
CAUTION: When DHCP is enabled, do not remove the Ethernet cable and turn the power off. The cable
needs to remain plugged into the unit while cycling the power.
65
1594A/1595A Super-Thermometer
Configuring the Network (LAN) Port
Configuring the LAN port is accomplished through the Remote Interface section of the System menu. The
LAN configuration parameters are HARDWARE MAC, DHCP ENABLE, IP ADDRESS, GATEWAY, SUBNET MASK, HOST NAME, and CONTROL ENABLE.
To configure the LAN port settings:
1.
2.
3.
4.
5.
Press the MENU key.
Select the SYSTEM MENU (F5) function key
Select the REMOTE INTERFACE (F2) function key
Select the NETWORK (F3) function key
Use the following instructions to configure each setting.
Note: When addressing some LAN addresses, computers will often interpret 0’s in the IP address as
OCTAL values. As an example, if an IP address is entered into the Super-Thermometer as
129.196.017.023 and then an attempt to establish communication to the instrument, the IP address of
129.196.17.23 should be used. Attempting to establish a connection to 120.196.017.023 may result in a
connection request to 129.196.15.19.
Important: When changing LAN settings, leave the Super-Thermometer connected to the network and
cycle the power to activate any changes made.
8.2.1 Hardware Mac Address
HARDWARE MAC is the address of the network port. It is set at the factory and cannot be changed.
8.2.2 Selecting Dynamic Host Configuration Protocol (DHCP)
Dynamic Host Configuration Protocol (DHCP) is a client-server protocol that eliminates having to manually
set permanent/static IP addresses. The DHCP server provides configuration parameters (dynamic IP address,
subnet mask, and default gateway IP addresses) which are required for a client to participate in an IP network,
Using DHCP is the easiest way to configure the Super-Thermometer for remote operation in a network. DHCP
is enabled by default from the factory. When connected to a network, and the LAN port is enabled, the SuperThermometer will try and retrieve the parameters from a DHCP server that are necessary for communication.
If the parameters can’t be obtained, communication will not work.
Important: Before enabling or disabling DHCP, ensure the Super-Thermometer is connected to the
network by plugging the network cable into the LAN port on the Super-Thermometer. Always cycle the
power after making changes to DHCP.
To disable or enable DHCP, in the NETWORK screen, arrow down to DHCP ENABLE and use the Left/Right
arrow keys to select ON (enable) or OFF (disable).
8.2.3 Setting a Static Internet Protocol (IP) Address
An internet (IP) address is required for all internet and TCP/IP communications. If DHCP is enabled, the Super-Thermometer will use the dynamic address supplied by the DHCP server. However, if DHCP is disabled,
the configured static IP address will be used.
The Super-Thermometer comes from the factory with IP address set to 0.0.0.0.
Note: If the Super-Thermometer will be used on a corporate network and DHCP is not used, contact the
network administrator for a static IP address to be used exclusively by the Super-Thermometer. DHCP
must be disabled to use a static IP address.
To enter a static IP address, use the following steps:
66
Remote Operation
Configuring the Network (LAN) Port
1. In the NETWORK screen, use the Up/Down arrow keys to select DHCP ENABLE.
2. IF DHCP is set to ON, use the Left/Right arrow keys to select OFF. Press the ENTER key to save the
change.
3. Arrow down to IP ADDRESS and enter the desired static IP address using the front panel keys. Press
the ENTER key to save the IP address.
4. Cycle the unit’s power to allow the new address to take effect.
8.2.4 Setting the LAN Gateway Address
If communication to the Super-Thermometer passes through a router or gateway, and DHCP is disabled, the
subnet mask and gateway address on both the host computer and the Super-Thermometer must be set. Get the
correct subnet mask and gateway address from the network administrator.
The gateway address is the IP address of a gateway (router) attached to the same network as the Super-Thermometer. When the instrument detects that a host computer is not on the same network (using the network
number), the data is sent through the gateway to reach the host computer.
The gateway address is a 32-bit number. This number is represented as four, 3-digit numbers. The default
subnet mask address set from the factory is 0.0.0.0.
To change gateway address, use the following steps:
Note: Gateway address is not available if DHCP is enabled. Disable DHCP before entering the gateway
address.
1. In the NETWORK screen, use the Up/Down arrow keys to select GATEWAY.
2. Use the front panel numeric keys to enter the gateway address. Press the ENTER key to save the
address.
3. Cycle the unit’s power to allow the new address to take effect.
8.2.5 Setting the LAN Subnet Mask
If communication to the Super-Thermometer passes through a router or gateway, and DHCP is disabled, the
subnet mask and default gateway address on both the host computer and the Super-Thermometer must be set.
Get the correct subnet mask and gateway address from the network administrator.
The subnet mask is a 32-bit number. This number is represented as four, 3-digit numbers. The default subnet
mask address set from the factory is 255.255.255.0.
To change subnet mask address, use the following steps:
Note: Subnet mask address is not available if DHCP is enabled. Disable DHCP before entering the
subnet mask address.
1. In the NETWORK screen, use the Up/Down arrow keys to select SUBNET MASK.
2. Use the front panel numeric keys to enter the subnet mask address. Press the ENTER key to save the
address.
3. Cycle the unit’s power to allow the new address to take effect.
8.2.6 Setting the Host Name
The Host Name is the host portion of the domain name, which is translated into an IP address. The default host name is “F159X-<serial number>”, where <serial number> is the unique serial number of the
Super-Thermometer.
To change the Host Name, use the following steps:
67
1594A/1595A Super-Thermometer
Using the Web Interface
1. In the NETWORK screen, use the Up/Down arrow keys to select HOST NAME.
2. While HOST NAME is highlighted, pressing the ENTER key opens the Alpha-Numeric Interface
allowing the user to enter a host name up to 16 characters in length.
3. Select the SAVE (F3) function key to save the newly entered host name.
4. Cycle the unit’s power to allow the new host name to take effect.
8.3 Using the Web Interface
The Super-Thermometer web interface (“Figure 17 Super-Thermometer Web Interface” on page 68) allows
the user to easily communicate with the Super-Thermometer through the Ethernet connection. The web interface is a page that is served by the Super-Thermometer when the LAN port is configured and connected to a
network. The user is able to access the web interface by simply entering the IP address of the Super-Thermometer in an internet browser.
Important: The LAN port must be properly configured and connected to a network before the web
interface tool will operate. The computer used to view the web interface must be on the same network.
The Home screen of the web interface displays product information and the current TCP/IP settings of the
Super-Thermometer.The Measure screen of the web interface provides a remote view of the Super-Thermometer display with buttons and selection boxes that allow the user to start and stop measurement, reset statistics,
clear alert messages, enable and disable scan mode, and select measurement channels.
The Terminal screen of the web interface allows the user to enter any remote operation command in the
Command window. If a command requires a reply from the Super-Thermometer, the reply will appear in the
Response window. A password is required to use the Terminal screen. The default password is 1234. A new
password can be configured in the System Menu, Password screen.
Figure 17 Super-Thermometer Web Interface
8.4 Configuring the USB Port
The rear USB device port (Type B), labeled COMPUTER, allows the Super-Thermometer to be controlled by
a computer as a USB peripheral.
The USB port must be enabled before communication. Use the following steps to enable the rear USB port:
68
Remote Operation
Configuring the IEEE-488 Port
1. Press the MENU key.
2. Select the SYSTEM MENU (F5) function key
3. Select the REMOTE INTERFACE (F2) function key
4. Select the USB (F2) function key
5. Use the Left/Right arrow keys to change PORT ENABLE to ON (enable).
Before plugging the USB communication cable from the Super-Thermometer into a computer, make sure
the computer is connected to the internet to allow the USB driver to download and install in the computer
automatically.
If an internet connection is not available, the computer will detect the Super-Thermometer as an unknown
USB device and will prompt for a driver. Insert the DVD provided with the Super-Thermometer into the
computer and browse into the USB driver folder. When the driver is selected, the PC will automatically load it.
The user may be prompted a second time to browse to the USB driver folder and repeat the process.
When the Super-Thermometer is recognized by the computer, it is ready for communication. Search in the
computer’s operating system to find the com port address assigned to the USB port connected to the SuperThermometer. Once the com port address is identified, remote operation commands can be sent using the com
port.
8.5 Configuring the RS-232 Serial Port
The RS-232 serial port implements the RS-232 communication standard. This port is always enabled. The RS232 parameters are 8 data bits, one stop bit, and no parity. The baud rate is user-selected. The physical port is a
9-pin D connector.
To configure the port, use the following to open the RS-232 configuration screen:
1. Press the MENU key.
2. Select the SYSTEM MENU (F5) function key
3. Select the REMOTE INTERFACE (F2) function key
4. Select the SERIAL (F1) function key
The RS-233 configuration settings are BAUD RATE and LINEFEED. Configure these settings as needed.
8.6 Configuring the IEEE-488 Port
The IEEE-488 port implements a common standard parallel instrument interface bus. The port is disabled by
default and must be enabled to be used. The user may specify the bus address. It provides the following IEEE488 defined capabilities: SH1, AH1, T6, TE0, L4, LE0, SR1, RL0, PP0, DC1, DT0, C0, E2.
The IEEE-488 configuration settings are PORT ENABLE, ADDRESS, and TERMINATION. To make
changes to these settings, use the following steps to go to the IEEE-488 configuration screen:
1. Press the MENU key.
2. Select the SYSTEM MENU (F5) function key
3. Select the REMOTE INTERFACE (F2) function key
4. Select the IEEE-488 (F4) function key
To use the port, ensure PORT ENABLE is set to ON (Enable) and set ADDRESS to an address that is not being used by another device on the IEEE-488 bus. The address may be set to a number between 1 and 30. The
default address is 22. Always press the ENTER key after changing the address.
TERMINATION determines if a carriage return character (ASCII code 13) or linefeed character (ASCII code
10) terminates a response. The default option is LINEFEED. An IEEE-488 EOI message also accompanies the
final character of every transmission.
The IEEE-488 port accepts either or any combination of, a linefeed, carriage return, or EOI as a terminator.
The CLEAR INTERFACE (F1) function key is used to clear the input and output buffers and reset the IEEE488 interface, just as if the IFC or SDC control message was received.
69
1594A/1595A Super-Thermometer
Interface Commands
8.7 Interface Commands
An alphabetical listing of the commands implemented by the Super-Thermometer is shown in Table 19 on
page 70. These commands can be used with all of the remote operation ports. An example and description
of each command is included following the Remote Operations Command table.
8.7.1 Command Syntax
The Super-Thermometer accepts commands that set parameters, execute functions or respond with requested
data. Commands are in the form of strings of ASCII-encoded characters. Commands consist of a command
header and, if necessary, parameter data. All commands must be terminated with either a carriage return
(ASCII 0D hex or 13 decimal) or new line character (ASCII 0A hex or 10 decimal). Letter characters in commands are not case sensitive.
Command headers consist of one or more mnemonics separated by colons (:). Mnemonics use letter characters
and possibly numeric digits as well. Commands as published use abbreviated words for mnemonics. Only
the first three or four characters of each word in a received command are recognized, and subsequent letters
are ignored. This allows a user to use the full word if desired, for instance “FETCH?” instead of “FETC?”. A
mnemonic may end with a numeric suffix that specifies one of a set of independent function blocks such as
input channel data paths. If a numeric suffix is omitted when a particular block must be specified, an error is
generated in the error queue (“Header suffix out of range”).
Query commands are commands that request data in response. Query commands have a question mark (?) immediately following the command header. Some commands require parameter data to specify values for one or
more parameters. The command header is separated from the parameter data by a space (ASCII 20 hex or 32
decimal). Multiple parameters, when required, are separated by a comma (,).
This product does not support compound commands (multiple commands per line separated with semicolons).
All commands are sequential: the execution of each command and any associated response is completed before any subsequent command is processed.
Some commands may be password-protected, so that the associated setting cannot be changed without first
issuing the password access enable command (SYST:PASS:CEN). Some commands may conditionally be
password-protected, depending on the associated group password protection setting. The level of password
protection is so indicated in the description for each command, unless the command is never protected. Reading a setting is always allowed.
In the commands lists and descriptions that follow, brackets [] indicate optional usage. For a <boolean>
parameter, “0” or “1” is accepted, or alternately “OFF” or “ON”; a corresponding response to a query is either
“0” or “1” only. Many parameters may be given as “DEF”, “MIN”, or “MAX” to set the setting to its default,
minimum, or maximum value respectively. A setting’s default, minimum, or maximum value may be determined using the query form of the command and adding a parameter “DEF”, “MIN”, or “MAX” respectively.
8.7.2 List of Commands
The following table lists the commands in alphabetical order.
Table 19 Report Operation Commands
70
Command
Function
*CLS
Clears all status registers and the error queue
*ESE
Sets the Standard Event Status Enable Register
*ESR?
Reads and clears the Standard Event Status
Register
*IDN?
Reads the product information
*RST
Resets operating settings to defined values
*SRE
Sets the Service Request Enable Register
*STB?
Reads the Status Byte Register
Associated Setting or
Function (screen)
Remote Operation
Interface Commands
Associated Setting or
Function (screen)
Command
Function
CAL:DATE
Sets the instrument’s date of calibration
Calibration Date (Calibration
Parameters)
CAL:PAR:LIN<n>
Sets a calibration linearity correction parameter
Linearity C<n> (Calibration
Parameters)
CAL:PAR:RES
Sets the calibrated resistance of an internal
reference resistor
— Ω Resistor (Calibration
Parameters)
CAL:PAR:ZERO
Sets the calibration zero correction parameter
Zero Correction (Calibration
Parameters)
CALC<n>:AVER:ALL?
Reads a channel’s statistical values
(Main Screen)
CALC<n>:AVER:AVER?
Reads a channel’s statistical mean
Mean (Main Screen)
CALC<n>:AVER:CLEA
Clears a channel’s statistics
RESET STATISTICS (Main Screen)
CALC:AVER:COUN
Sets the statistics Sample Count setting
Sample Count (Statistics Settings)
CALC<n>:AVER:MAX?
Reads a channel’s statistical maximum
Maximum (Main Screen)
CALC<n>:AVER:MIN?
Reads a channel’s statistical minimum
Minimum (Main Screen)
CALC<n>:AVER:SDEV?
Reads a channel’s statistical sample standard
deviation
Std Dev (Main Screen)
CALC<n>:AVER:SEM?
Reads a channel’s statistical standard error of the
mean
SE of Mean (Main Screen)
CALC<n>:AVER:SPR?
Reads a channel’s statistical spread
Spread (Main Screen)
CALC<n>:AVER:SSIZ?
Reads a channel’s statistical sample size
N (Main Screen)
CALC:AVER:TCON
Sets the Statistics Mode setting
Statistics Mode (Statistics Settings)
CALC:DELT:CHAN
Sets the Delta Channel setting
Delta Channel (Statistics Settings)
CALC<n>:DELT:DATA?
Reads a channel’s delta result
Delta (Main Screen)
CALC:DELT:MODE
Sets the Delta Mode setting
Delta Mode (Statistics Settings)
CALC:DELT:OFFS
Sets the Delta Offset setting
Delta Offset (Statistics Settings)
CALC<n>:TYPE
Sets the channel’s Calculation setting
Calculation (Channel Settings)
DATA:REC:ALL
Sets the data recording Record Statistics setting
Record Statistics (Recording
Settings)
DATA:REC:FILE
Sets the data recording USB File setting
USB File (Recording Settings)
DATA:REC:MEM
Sets the data recording Memory Device setting
Memory Device (Recording Settings)
DATA:REC[:STAT]
Enables data recording
START/STOP RECORDING (Main
Screen)
DISP:ALER:CLEA?
Clears any alert message that is active
CLEAR MESSAGE (Main Screen)
DISP:ALER[:READ]?
Reads the display alert message
(Main Screen)
DISP:DATE:FORM
Sets the display Date Format setting
Date Format (Display Settings)
DISP:DEC:FORM
Sets the display Decimal setting
Decimal (Display Settings)
DISP:FIEL:FEED<n>?
Reads a statistics field setting of the visible statistics
fields memory set
(Main Screen)
DISP:FIEL:MEM[?] <n>
Reads or sets the statistics fields memory set for
display
Recall Memory (Field Settings)
DISP:FIEL:MEM<n>:FEED
<n>[?] <s>
Reads or sets a statistics field setting of a statistics
fields memory set
Field <n> (Field Settings)
DISP:LANG
Sets the display Language setting
Language (Display Settings)
DISP:TEMP:DIG
Sets the display Temperature Resolution setting
Temperature Resolution (Display
Settings)
DISP:WARN:DUE
Sets the display Rs Due Warning enable
Rs Due Warning (Display Settings)
DISP:WARN:ITS
Sets the display ITS-90 Subrange Warning enable
ITS-90 Subrange Warning (Display
Settings)
FETC?
Reads a channel’s latest measurement
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1594A/1595A Super-Thermometer
Interface Commands
72
Associated Setting or
Function (screen)
Command
Function
INIT:CONT
Starts or stops measurement
START/STOP MEASURING (Main
Screen)
INIT:STOP:BEEP
Sets the stop timer’s Timer Beep setting
Stop Timer Enable (Timing Settings)
INIT:STOP:DUR
Sets the stop timer’s Timer Duration setting
Stop Timer Duration (Timing
Settings)
INIT:STOP[:STAT]
Sets the Stop Timer Enable
Stop Timer Enable (Timing Settings)
INIT:STOP:TIME?
Reads the stop timer’s time remaining
Stop Timer time remaining (Main
Screen)
INP<n>:CURR
Sets a channel’s Sensing Current setting
Sensing Current (Channel Settings)
INP<n>:CURR:DATA?
Reads a channel’s actual sensing current
INP<n>:CURR:STAN
Sets a channel’s Standby Current enable
Standby Current (Channel Settings)
INP:PROB:ADD
Adds a new probe definition to the Probe Library
ADD PROBE (Probe Menu)
INP:PROB:COUN?
Reads the number of probe definitions in the Probe
Library
INP:PROB:DEL
Deletes a probe definition from the Resistor Library
INP:PROB:FIRS?
Reads the ID of the first probe in the Probe Library
INP<n>:PROB:IDEN
Assigns a probe definition to the channel
INP:PROB:NEXT?
Reads the ID of the next probe in the Probe Library
INP:PROB:PAR
Sets the value of a setting in a resistor definition
EDIT PROBE (Probe Menu)
INP:PROB:TEST?
Reads the temperature calculated from resistance
using the probe definition
TEST CALCULATION (Edit Probe)
INP:REAR<n>:RS:IDEN
Sets the reference resistor assigned to a rear
reference resistor input
ASSIGN RESISTOR (Set Up Rs)
INP:RS:ADD
Adds a new resistor definition to the Resistor Library
ADD RESISTOR (Define Resistor)
INP:RS:COUN?
Reads the number of resistor definitions in the
Resistor Library
INP:RS:DEL
Delete the resistor ID from the Resistor Library
INP:RS:FIRS?
Reads the ID of the first resistor in the Resistor
Library
INP<n>:RS:IDEN
Sets the reference resistor assigned to a front
reference resistor input
INP:RS:NEXT?
Reads the ID of the next resistor in the Resistor
Library
INP:RS:OVEN:STAB
Reads the oven stable condition
INP:RS:PAR
Sets the value of a setting in a resistor definition
INP<n>:RS:ROUT
Sets a channel’s Reference Resistor (Rs) setting
ROUT:CLOS
Selects one channel for measurement
ROUT:CLOS:STAT?
Returns the channel number of whatever channel is
actively being measured
ROUT:SCAN
Enables channels for scanning
ROUT:SCAN:ADD
Adds channels to the scan list
ROUT:SCAN:ALT
Sets the scan Alternate Reference setting
ROUT:SCAN:DEL
Removes channels from the scan list
ROUT:SCAN:REF
Sets the scan Reference Channel setting
Reference Channel (Scan Settings)
ROUT:SCAN:REP
Sets the scan Repeat Count setting
Repeat Count (Scan Settings)
ROUT:SCAN:STAT
Sets the Scan Enable setting
Scan Enable (Scan Settings)
SENS:APER
Sets the measurement time and Display Interval
Display Interval (Timing Settings)
DELETE PROBE (Manage Probes)
ASSIGN PROBE (Channel Menu)
DELETE RESISTOR (Manage
Resistors)
ASSIGN RESISTOR (Set Up Rs)
EDIT RESISTOR (Define Resistor)
Active Channel (Main Screen)
Alternate Reference (Scan Settings)
Remote Operation
Interface Commands
Associated Setting or
Function (screen)
Command
Function
SENS:APER:PRES
Sets the measurement timing settings to preset
values
PRESET PRECISION PRESET
FAST PRESET LONG (Timing
Settings)
SENS:APER:SAMP
Sets the measurement Sample Period
Sample Period (Timing Settings)
SENS:AVER1
Sets the Average Enable for the sample average
Average Enable (Timing Settings)
SENS:AVER2
Sets the digital filter’s Filter Enable
Filter Enable (Digital Filter)
SENS:AVER2:COUN
Sets the digital filter’s Average Count setting
Average Count (Digital Filter)
SENS:AVER2:CLEA
Clears the digital filter buffer
CLEAR FILTER f-key (Digital Filter)
SENS<n>:DATA?
Reads a channel’s latest resistance measurement
SENS<n>:RRAT:DATA?
Reads a channel’s latest resistance ratio
measurement
STAT:OPER?
Reads and clears the Operation Status Event
Register
STAT:OPER:COND?
Reads the Operation Status Condition Register
STAT:OPER:ENAB
Sets the Operation Status Enable Register
STAT:PRES
Sets the status enable registers to defined states
STAT:QUES?
Reads and clears the Questionable Status Event
Register
STAT:QUES:COND?
Reads the Questionable Status Condition Register
STAT:QUES:ENAB
Sets the Questionable Status Enable Register
SYST:BEEP
Produces an immediate beep from the speaker
SYST:BEEP:KEY
Sets the Keypad Beep setting
Keypad Beep (Display Settings)
SYST:BEEP:ALER
Sets the Alert Beep setting
Alert Beep (Display Settings)
SYST:CODE:VERS?
Read the firmware code version
SYST:COMM:GPIB:ADDR
Sets the IEEE-488 port’s Address setting
Address (IEEE-488 Port)
SYST:COMM:GPIB[:STAT]
Sets the IEEE-488 port’s Port Enable setting
Port Enable (IEEE-488 Port)
SYST:COMM:GPIB:TERM
Sets the IEEE-488 port’s Termination setting
Termination (IEEE-488 Port)
SYST:COMM:SER:BAUD
Sets the serial port Baud Rate setting
Baud Rate (Serial Port)
SYST:COMM:SER:LIN
Sets the serial port Linefeed setting
Linefeed (Serial Port)
SYST:COMM:SOCK:ADDR
Sets the network port’s IP Address setting
IP Address (Network Port)
SYST:COMM:SOCK:CONT
Sets the network port’s Control Enable setting
Control Enable (Network Port)
SYST:COMM:SOCK:DHCP
Sets the network port’s DHCP Enable
DHCP Enable (Network Port)
SYST:COMM:SOCK:GAT
Sets the network port’s Gateway setting
Gateway (Network Port)
SYST:COMM:SOCK:KEEP
Sets the network port’s keep-alive timeout
SYST:COMM:SOCK:MAC?
Reads the network port’s Hardware MAC address
Hardware MAC (Network Port)
SYST:COMM:SOCK:MASK
Sets the network port’s Subnet Mask setting
Subnet Mask (Network Port)
SYST:COMM:SOCK:NAME
Sets the network port’s Host Name
Host Name (Network Port)
SYST:COMM:USB[:STAT]
Sets the USB port’s Port Enable
Port Enable (USB Port)
SYST:CONF:CHAN?
Reads the number of available channels
SYST:CONF:SCAN?
Reads the model number of an attached scanner
SYST:DATE
Sets the Date of the system clock
SYST:ERR?
Reads the next error in the error queue
SYST:KLOC
Sets the front-panel key lock
SYST:PASS:CDIS
Disables access to password-protected settings
SYST:PASS:CEN
Enables access to password-protected settings
SYST:PASS:CEN:STAT?
Returns the password access state
SYST:PASS:GROU:MEAS
Sets the password Measure Protection setting
Measure Protection (Password)
SYST:PASS:GROU:PROB
Sets the password Probe Protection setting
Probe Protection (Password)
Date (Time and Date)
73
1594A/1595A Super-Thermometer
Interface Commands
Command
Function
Associated Setting or
Function (screen)
SYST:PASS:GROU:RES
Sets the password Resistor Protection setting
Resistor Protection (Password)
SYST:PASS:GROU:TIME
Sets the password Time/Date Protection setting
Time/Date Protection (Password)
SYST:PASS:NEW
Changes the password
Password (Password)
SYST:PON:MIN?
Reads the time in minutes since power-on
SYST:TIME
Sets the Time of the system clock
Time (Time and Date)
SYST:TIME:DAYL
Sets the Daylight Saving automatic adjust setting
Daylight Saving (Time and Date)
TEST:CURR:CONF
Sets the configuration of the sensing current test
CURRENT TEST (Calibration)
TEST:CURR[:STAT]
Starts or stops the sensing current test
CURRENT TEST (Calibration)
TEST:LIN:ABOR
Cancels a linearity self-test
LINEARITY TEST (Calibration)
TEST:LIN:INIT
Starts linearity calibration
LINEARITY TEST (Calibration)
TEST:LIN:PAR?
Reads the suggested linearity calibration parameters
LINEARITY TEST (Calibration)
TEST:LIN:REP<n>?
Reads the linearity self-test report
LINEARITY TEST (Calibration)
TEST:LIN:STAT?
Reads the state of the linearity self-test
LINEARITY TEST (Calibration)
TEST:LIN:TIME?
Reads the time remaining of the linearity self-test
LINEARITY TEST (Calibration)
TEST:LIN:TOL<n>?
Reads a linearity calibration error tolerance
LINEARITY TEST (Calibration)
TEST:SYST:ABOR
Cancel a system self-test
SYSTEM TEST (Calibration)
TEST:SYST:INIT
Initiate a system self-test
SYSTEM TEST (Calibration)
TEST:SYST:REP<n>?
Reads the report from a system self-test
SYSTEM TEST (Calibration)
TEST:SYST:STAT?
Read the completion state of the system self-test
SYSTEM TEST (Calibration)
UNIT:TEMP
Set the temperature Unit
Unit (Temperature Unit)
8.7.3 Descriptions of Commands
The function of each command as well as an example of each is listed below.
8.7.3.1
*CLS
Clears all status registers and the error queue. Specifically, this command clears the Standard Event Status
Register (see Section 8.7.3.3, *ESR?, on page 74), Operation Status Event Register (see Section 8.7.3.89,
STAT:OPER?, on page 94), Questionable Status Event Register (see Section 8.7.3.92, STAT:QUES?, on
page 94), and system error queue (see Section 8.7.3.116, SYST:ERR?, on page 98). The Status Byte Register (see Section 8.7.3.7, *STB?, on page 76) is updated to show the new state of the registers.
8.7.3.2
*ESE <value>
Example command: *ESE 16
Query form: *ESE?
Sets the Standard Event Status Enable Register. This mask register determines which corresponding bits of the
Standard Event Status Register (see Section 8.7.3.3, *ESR?, on page 74) affect the ESB summary message
(bit 5) of the Status Byte Register.
8.7.3.3
*ESR?
Example response: 160
Reads and clears the Standard Event Status Register. This indicates any of several events defined by the IEEE488.2 standard and which are listed in the following table. Reading the Standard Event Status Register clears
it. The register is also cleared by the *CLS command.
74
Remote Operation
Interface Commands
8.7.3.4
Bit
Event
0
OPC, Operation Complete
1
Request control (not used)
2
Query error
3
Device dependent error
4
Execution error
5
Command error
6
User request (not used)
7
Power on
*IDN?
Example response: FLUKE,1594,A9C111,1.10/1.00
Reads the instrument information.
The response is given in the following format:
<manufacturer>,<model number>,<serial number>,<version numbers>
8.7.3.5
*RST
Sets operating settings to default states.
The following settings are affected:
Any self-test in progress is canceled
●● Measurement enable is set to OFF
●● Channel 2 enable is set to ON, all other channels OFF
●● Scan Enable is set to ON
●● Repeat Count is set to 1
●● Alternate Reference is set to OFF
●● Reference Channel is set to channel 2
●● Timing settings are preset to NORMAL presets
●● Stop Timer Enable is set to OFF
●● Timer Duration is set to 3600 s
●● Timer Beep is set to ON
●● Filter Enable is set to ON
●● Time Window is set to 60
●● Statistics Mode is set to UNLIMITED
●● Sample Count is set to 100
●● Delta Mode is set to OFFSET
●● Delta Offset is set to 0.
●● Delta Channel is set to channel 2
●● Unit is set to °C
●● The key lock setting is set to off
●● Statistics are reset
Not affected are channel settings other than enable, probe definitions, resistor definitions, recording settings,
display settings other than Unit, remote interface settings, time and date, password settings, and calibration
settings.
●●
8.7.3.6
*SRE <value>
Example command: *SRE 16
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1594A/1595A Super-Thermometer
Interface Commands
Query form: *SRE?
Sets the Service Request Enable register. This mask register determines which corresponding bits of the Status
Byte Register (see Section 8.7.3.7, *STB?, on page 76) affect the MSS master summary bit (bit 6) of the
Status Byte Register and generate a service request from the IEEE-488 port.
8.7.3.7
*STB?
Example response: 16
Reads the Status Byte Register. This indicates any of several events defined by the IEEE-488.2 and SCPI standards and which are listed in the following table. Reading the Status Byte Register does not affect it.
Bit
8.7.3.8
Condition
0
(not used)
1
(not used)
2
Error
3
Questionable status
4
Message available
5
Event status
6
Master summary status
7
Operation status
CAL:DATE <year>,<month>,<day>
Example command: CAL:DATE 2009,8,21
Query form: CAL:DATE?
Password protection: unconditional
Sets the instrument’s date of calibration.
8.7.3.9
CAL:PAR:LIN<n> <value>
Query form: CAL:PAR:LIN1?
Password protection: unconditional
Sets a calibration Linearity C<n> parameter.
These settings may be used to apply a linearity correction to the measurement circuit.
IMPORTANT: Calibration parameters should not be changed except as part of the Super-Thermometer
calibration procedure performed by a qualified service technician.
8.7.3.10
CAL:PAR:RES<n> <value>
Query form: CAL:PAR:RES<n>?
Password protection: unconditional
Sets the calibrated resistance of an internal reference resistor. Suffix <n> specifies the resistor; 1: 1 Ω; 2: 10 Ω;
3: 25 Ω; 4: 100 Ω; 5: 10 kΩ.
IMPORTANT: Calibration parameters should not be changed except as part of the Super-Thermometer calibration procedure performed by a qualified service technician.
8.7.3.11
CAL:PAR:ZERO <value>
Query form: CAL:PAR:ZERO?
Password protection: unconditional
76
Remote Operation
Interface Commands
Sets the calibration Zero Correction parameter.
This setting may be used to apply a zero correction to the measurement circuit.
IMPORTANT: Calibration parameters should not be changed except as part of the Super-Thermometer
calibration procedure performed by a qualified service technician.
8.7.3.12
CALC<n>:AVER:ALL?
Example command: CALC3:AVER:ALL?
Example response: 231.928581,0.000488,0.000212,231.92862,231.928479,23
Example response: 231.928581,,,231.928581,231.928581,1
Example response: ,,,,,0
Reads a channel’s statistical mean, standard deviation, standard error of the mean, maximum, minimum, and
sample size.
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
The response is given in the following format:
<mean>,<std. dev.>,<std. error>,<max.>,<min.>,<N>
If a value is invalid or not available, the field is left empty in the response (the associated field separator
comma remains).
The statistical values have the same unit as the measurement returned by the FETC? command. If the calculation is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPERATURE UNIT (F5), on page 50).
8.7.3.13
CALC<n>:AVER:AVER?
Example command: CALC3:AVER:AVER?
Example response: 231.928581
Reads a channel’s statistical mean (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting see Section 5.7.4.5, TEMPERATURE UNIT (F5), on page 50).
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.14
CALC[<n>]:AVER:CLEA
Example command: CALC:AVER:CLEAR
Clears a channel’s statistics.
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner. If the
suffix number is omitted, statistics for all channels are cleared. This is equivalent to pressing the RESET STATISTICS function key in the Main Screen.
The *RST command also clears the statistics for all channels.
8.7.3.15
CALC:AVER:COUN <value>
Example command: CALC:AVER:COUNT 50
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Interface Commands
Query form: CALC:AVER:COUN?
Alternate parameter: DEF, MIN, MAX
Sets the statistics Sample Count setting.
Parameter <value> is the maximum number of samples in the moving window when the Statistics Mode setting is LIMITED (see Section 8.7.3.22, CALC:AVER:TCON NORM|MOV, on page 79). The range is 1
through 100 and the default is 100.
The *RST command sets Sample Count to 100.
8.7.3.16
CALC<n>:AVER:MAX?
Example command: CALC3:AVER:MAX?
Example response: 231.928833
Reads a channel’s statistical maximum (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPERATURE UNIT (F5), on page 50).
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.17
CALC<n>:AVER:MIN?
Example command: CALC3:AVER:MIN?
Example response: 231.928207
Reads a channel’s statistical minimum (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPERATURE UNIT (F5), on page 50).
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.18
CALC<n>:AVER:SDEV?
Example command: CALC3:AVER:SDEV?
Example response: 0.000144
Reads a channel’s statistical sample standard deviation (see Section 5.7.4.2, FIELD SETTINGS (F2), on page
48).
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPERATURE UNIT (F5), on page 50).
The standard deviation is available if at least four measurements have been acquired from the channel. If
no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
78
Remote Operation
Interface Commands
8.7.3.19
CALC<n>:AVER:SEM?
Example command: CALC3:AVER:SEM?
Example response: 0.000039
Reads a channel’s statistical standard error of the mean (see Section 5.7.4.2, FIELD SETTINGS (F2), on page
48).
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPERATURE UNIT (F5), on page 50).
The standard error of the mean is available if at least four measurements have been acquired from the channel.
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.20
CALC<n>:AVER:SPR?
Example command: CALC3:AVER:SPREAD?
Example response: 0.000626
Reads a channel’s statistical spread (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Temperature Unit (F5) in the
Display Menu).
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.21
CALC<n>:AVER:SSIZ?
Example command: CALC3:AVER:SSIZE?
Example response: 40
Reads a channel’s statistical sample size (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
8.7.3.22
CALC:AVER:TCON NORM|MOV
Query form: CALC:AVER:TCON?
Alternate parameter: DEF
Sets the Statistics Mode setting (see Section 5.7.4.3, STATISTICS SETTINGS (F3), on page 49).
If the parameter is NORM (normal), the sample size is unlimited; the sample set accumulates until the statistics are cleared. If the parameter is MOV (moving window), the sample size is limited, and once the sample
size reaches the Sample Count value, earliest samples are removed from the sample set when new samples are
added.
The *RST command sets Statistics Mode to the default setting which is NORM (UNLIMITED).
8.7.3.23
CALC:DELT:CHAN <channel>
Example command: CALC:DELT:CHAN 1
Query form: CALC:DELT:CHAN?
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Interface Commands
Sets the Delta Channel setting (see Section 5.7.4.3, STATISTICS SETTINGS (F3), on page 49).
Parameter <channel> is the channel number to use as the reference, which may be 1 through 4 for the corresponding front channel input, 5 through 14 for channels of the first attached scanner, and 15 through 24 for
channels of the second attached scanner.
This setting is only meaningful when Delta Mode is set to CHANNEL.
The *RST command sets Delta Channel to 2.
8.7.3.24
CALC<n>:DELT:DATA?
Example command: CALC3:DELT:DATA?
Example response: 0.104428
Reads a channel’s delta result (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
No result will be available if no measurement has been acquired on a designated Delta Channel or if the two
measurements have different units. If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error queue.
8.7.3.25
CALC:DELT:MODE OFFS|CHAN
Query form: CALC:DELT:MODE?
Alternate parameter: DEF
Sets the Delta Mode setting (see Section 5.7.4.3, STATISTICS SETTINGS (F3), on page 49).
If the parameter is OFFS (OFFSET), the delta result is calculated by subtracting the Delta Offset setting’s
value from the channel’s measurement. If the parameter is CHAN (CHANNEL), the delta result is calculated
by subtracting the measurement from the channel determined by the Delta Channel setting from the channel’s
measurement.
The *RST command sets Delta Mode to the default setting which is OFFS.
8.7.3.26
CALC:DELT:OFFS <value>
Query form: CALC:DELT:OFFS?
Sets the Delta Offset setting (see Section 5.7.4.3, STATISTICS SETTINGS (F3), on page 49).
This setting is only meaningful when Delta Mode is set to OFFSET.
The *RST command sets Delta Offset to the default value which is 0.
8.7.3.27
CALC<n>:TYPE TEMP|RES|RAT
Query form: CALC<n>:TYPE?
Alternate parameter: DEF
Sets the channel’s Calculation setting.
Suffix <n> specifies the channel number: 1 through 4 for the corresponding front channel input, 5 through 14
for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner. The
default setting may depend on the probe and reference resistor settings.
8.7.3.28
DATA:REC:ALL <boolean>
Query form: DATA:REC:ALL?
Alternate parameter: DEF
Sets the data recording Record Statistics setting (see Section 5.7.3.4.1, RECORDING SETTINGS (F1), on
page 42). The default is ON.
80
Remote Operation
Interface Commands
8.7.3.29
DATA:REC:FILE <name>
Query form: DATA:REC:FILE?
Sets the data recording USB File name (see Section 5.7.3.4.1, RECORDING SETTINGS (F1), on page 42).
8.7.3.30
DATA:REC:MEM INT|USB|BOTH
Query form: DATA:REC:MEM?
Sets the data recording Memory Device (see Section 5.7.3.4.1, RECORDING SETTINGS (F1), on page
42).
8.7.3.31
DATA:REC[:STAT] <boolean>
Query form: DATA:REC?
Starts or stops recording. This is equivalent to pressing the START RECORDING or STOP RECORDING
function key in the Main Screen. A <boolean> parameter value 1 enables recording; 0 disables recording.
The *RST command has no effect on this setting.
8.7.3.32
DISP:ALER:CLEA
Clears any alert message that is active.
8.7.3.33
DISP:ALER[:READ]?
Example response: 1,“Maximum temperature exceeded”
Reads the active alert message. The response given is the alert message number and description, comma-separated and with the description enclosed in quotation marks. If no alert message is active, the response is 0,”No
alert”. The following table lists the possible responses:
Alert
Cause
0,“No alert”
No alert message is active.
1,“Maximum temperature exceeded”
A measured temperature exceeds the limit defined for a probe.
2,“ITS-90 subrange exceeded”
A measured temperature is outside the ITS-90 subranges defined for
a probe.
3,“Resistor due for calibration”
A defined resistor in the Resistor Library is past due for calibration.
The active alert message may be cleared using the DISP:ALER:CLEA command.
8.7.3.34
DISP:DATE:FORM YMD|DMY|MDY
Query form: DISP:DATE:FORM?
Alternate parameter: DEF
Sets the display Date Format setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default
setting is YMD.
8.7.3.35
DISP:DEC:FORM PER|COMM
Query form: DISP:DATE:FORM?
Alternate parameter: DEF
Sets the display Decimal setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default setting is PER.
8.7.3.36
DISP:FIEL:FEED<n>?
Example command: DISP:FIEL:FEED4?
Example response: DEF
81
1594A/1595A Super-Thermometer
Interface Commands
Reads a statistics field setting of the visible statistics fields memory set (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Suffix <n> is the field number, which may be 1 through 4. The response will be one of the following: MEAN,
SDEV, SEM, MAX, MIN, SPR, N, DELT, RES, RAT, TIME, or DATE.
8.7.3.37
DISP:FIEL:MEM <n>
Example command: DISP:FIEL:MEM 4
Query form: DISP:FIEL:MEM<n>?
Alternate parameter: MIN, MAX, DEF
Reads or sets a statistics fields memory set for display (see Section 5.7.4.2, FIELD SETTINGS (F2), on page
48).
The parameter <n> may be a number from 1 to 4.
8.7.3.38
DISP:FIEL:MEM<n1>:FEED<n2> <feed>
Example command: DISP:FIEL:MEM4:FEED4 TIME
Query form: DISP:FIEL:MEM<n1>:FEED<n2>?
Alternate parameter: DEF
Reads or sets a statistics field setting of a statistics fields memory set (see Section 5.7.4.2, FIELD SETTINGS
(F2), on page 48).
Suffix <n1> is the memory set number, which may be 1 through 4. Suffix <n2> is the field number, which may
be 1 through 4. The parameter <feed> may be one of the following: MEAN, SDEV, SEM, MAX, MIN, SPR,
N, DELT, RES, RAT, TIME, or DATE.
8.7.3.39
DISP:HELP <boolean>
Query form: DISP:HELP?
Sets the display Start-up Help Screen enable.
This setting determines whether the Start-up Help Screen appears at power-on. By default it is 1 and the Startup Help Screen appears each time the instrument is powered on. If the setting is changed to 0, the Start-up
Help Screen will no longer appear.
8.7.3.40
DISP:LANG ENGLISH|CHINESE|JAPANESE|SPANISH|GERMAN|FRENCH|RUSSIAN
Query form: DISP:LANG?
Alternate parameter: DEF
Sets the display Language setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default
setting is ENGLISH.
8.7.3.41
DISP:TEMP:DIG <digits>
Query form: DISP:TEMP:DIG?
Alternate parameter: DEF, MIN, MAX
Sets the display Temperature Resolution setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47).
Parameter <digits> specifies the number of decimal places. The range is 1 to 6 and the default is 5.
8.7.3.42
DISP:WARN:DUE <boolean>
Query form: DISP:WARN:DUE?
Alternate parameter: DEF
82
Remote Operation
Interface Commands
Sets the display Rs Due Alert enable (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default
setting is OFF.
8.7.3.43
DISP:WARN:ITS <boolean>
Query form: DISP:WARN:ITS?
Alternate parameter: DEF
Sets the display ITS-90 Subrange Alert enable (see Section 5.7.4.1, USER SETTINGS (F1), on page 47).
The default setting is ON.
8.7.3.44
FETC? <channel>
Example command: FETCH? 4
Example response: 231.92811,C,4,2009-03-23 14:33:20
Reads a channel’s latest measurement.
The <channel> parameter may be 1 through 4 for corresponding front channel inputs, 5 through 14 for channels of a first attached scanner, or 15 through 24 for channels of a second attached scanner. If the <channel>
parameter is omitted, the latest measurement regardless of channel is returned.
If a measurement is available, the response is given in the following format:
<measurement value>,<unit>,<channel number>,<date and time>
<measurement value> is the value of the measurement. It may be a temperature, resistance, or resistance ratio.
The number of decimal places depends on the measured parameter. Trailing zeros are omitted.
<unit> may be “C”, “F”, or “K” for a temperature measurement; “O” for a resistance measurement, or “R” for
a resistance ratio measurement.
<channel number> is 1 through 4 for corresponding front channel inputs, 5 through 14 for channels of a first
scanner, or 15 through 24 for channels of a second scanner.
<time and date> gives the time and date of the measurement, separated by one space. The time is in 24-hour
format. The date is in the format YYYY-MM-DD.
If no measurement is available, no response is returned and error code -230, “Data corrupt or stale,” is generated in the error queue. The command STAT:OPER? may be used first to determine whether a new measurement has completed, and command STAT:QUES:COND? may be used to determine whether the new measurement is valid before an attempt is made to read it.
8.7.3.45
INIT:CONT <boolean>
Query form: INIT:CONT?
Starts or stops measurement. This is equivalent to pressing the START MEASUREMENT or STOP MEASUREMENT function key in the Measurement Screen. A <boolean> parameter value 1 enables measurement;
0 disables measurement.
The *RST command disables measurement.
8.7.3.46
INIT:STOP:BEEP <boolean>
Query form: INIT:STOP:BEEP?
Alternate parameter: DEF
Sets the stop timer’s Audio Indication setting (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39).
The *RST command sets Timer Beep to the default option which is ON.
8.7.3.47
INIT:STOP:DUR <value>
Example command: INIT:STOP:DUR 1200
Query form: INIT:STOP:DUR?
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1594A/1595A Super-Thermometer
Interface Commands
Alternate parameter: DEF, MIN, MAX
Sets the stop timer’s Timer Duration setting (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39).
The value is the number of seconds. The range is 1 to 86399 and the default is 3600 (one hour).
This setting is only meaningful when Stop Timer Enable is ON.
The *RST command sets Timer Duration to 3600.
8.7.3.48
INIT:STOP[:STAT] <boolean>
Query form: INIT:STOP?
Alternate parameter: DEF
Sets the Stop Timer Enable (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39).
The *RST command sets Stop Timer Enable to the default setting which is OFF.
8.7.3.49
INIT:STOP:TIME?
Example response: 874
Reads the stop timer’s time remaining.
The returned value is the time remaining in seconds. If the stop timer is disabled or measurement is not enabled, the returned value is 0.
8.7.3.50
INP<n>:CURR <current>
Example command: INP1:CURR 1
Query form: INP<n>:CURR?
Alternate parameter: DEF, MIN, MAX
Sets a channel’s Sensing Current setting.
Suffix <n> specifies the channel number: 1 through 4 for the corresponding front channel input, 5 through 14
for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
The maximum and default values depend on the probe and reference resistor settings. The values may be read
using the query form with alternate parameters MAX and DEF respectively.
The actual current may be reduced if the resistance is too high. The actual current may be read using the
INP<n>:CURR:DATA? command.
8.7.3.51
INP<n>:CURR:DATA?
Reads a channel’s actual sensing current. It is the sensing current that was used when the latest measurement
of the channel was acquired.
8.7.3.52
INP<n>:CURR:STAN <boolean>
Query form: INP<n>:CURR:STAN?
Alternate parameter: DEF
Sets a channel’s Standby Current enable.
A parameter value 1 enables the standby current. When enabled, sensing current is sourced from the channel’s
terminals when measurement is enabled, even if the channel is not enabled or when another channel is being
scanned. The default setting is 0 (OFF).
8.7.3.53
INP:PROB:ADD <id>
Example command: INP:PROB:ADD “PRT_A46002”
Password protection: Probe Protection
84
Remote Operation
Interface Commands
Adds a new probe definition to the Probe Library. Before a probe can be assigned to a channel and temperature measured, the probe must have its definition added to the Probe Library (see Section 8.7.3.57,
INP<n>:PROB:IDEN <id>, on page 85).
Parameter <id> is the ID of the new probe definition. It can contain letters, numerals, hyphens, periods, forward slashes, and underscores. It must be between one and 24 characters in length, inclusive.
If <id> is different from all other IDs in the Probe Library and space is available in the Probe Library, a new
probe definition will be added and given the specified ID. The probe parameters will initially be set to default
values. The command INP:PROB:PAR should be used to set the parameters.
If <id> matches the ID of a probe already in the Probe Library or the Probe Library is full, no new probe definition is added, and error -224, “Illegal parameter value” will be generated in the error queue.
8.7.3.54
INP:PROB:COUN?
Alternate parameter: MAX
Reads the number of probe definitions in the Probe Library.
8.7.3.55
INP:PROB:DEL <id>
Example command: INP:PROB:DEL “PRT_A46002”
Password protection: Probe Protection
Deletes a probe definition from the Probe Library.
Parameter <id> is the ID of the probe definition to delete. If <id> does not match the ID of any probe in the
Probe Library, nothing is deleted, and error -224, “Illegal parameter value” is generated in the error queue.
If the deleted probe was assigned to a channel the channel’s probe setting is changed to undefined (see Section
8.7.3.57, INP<n>:PROB:IDEN <id>, on page 85).
8.7.3.56
INP:PROB:FIRS?
Example response: “PRT_A46002”
Reads the ID of the first probe in the Probe Library. It also resets the library index used by the
INP:PROB:NEXT? command.
If the Probe Library is empty the response is an empty string, “”.
8.7.3.57
INP<n>:PROB:IDEN <id>
Example command: INP1:PROB:IDEN “PRT_A46002”
Example command: INP2:PROB:IDEN NONE
Query form: INP<n>:PROB:IDEN?
Assigns a probe definition to the channel.
Suffix <n> specifies the channel number: 1 through 4 for the corresponding front channel input, 5 through 14
for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
Parameter <id> must either be the ID of a probe definition in the Probe Library, or “NONE” (undefined). Enclosing quotations marks are optional. If <id> does not match the ID of a probe definition in the Probe Library,
error -224,“Illegal parameter value” is generated in the error queue.
If a valid probe ID is assigned to the channel, the response to the query form is the ID of the probe enclosed in
quotation marks. If the assigned probe is undefined, the response is “NONE” without quotation marks.
The channel’s Calculation setting will automatically be set to resistance if it was temperature when the channel’s assigned probe is set to NONE.
8.7.3.58
INP:PROB:NEXT?
Example response: “A71040”
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Interface Commands
Reads the ID of the next probe in the Probe Library. It also advances the library index used for the next response to the INP:PROB:NEXT? command.
If there are no more probes in the Probe Library, the response is an empty string, “”.
8.7.3.59
INP:PROB:PAR <id>,<name>,<value>
Example command: INP:PROB:PAR “PRT_A46002”,TYPE,PRT
Query form: INP:PROB:PAR? <id>,<name>
Example query command: INP:PROB:PAR? “PRT_A46002”,TYPE
Example query response: PRT
Password protection: Probe Protection
Sets the value of a setting in a probe definition.
Parameter <id> is the ID of a probe definition in the Probe Library. The ID should be enclosed in double
quotation marks. If <id> does not match the ID of a probe definition in the Probe Library, error -224,“Illegal
parameter value” is generated in the error queue.
Parameter <name> specifies the setting to set. Settings and their associated names are listed in the table below
(also see Section 5.7.2.3, EDIT PROBE (F3), on page 36).
Setting
<name>
<value> type or options
Type
TYPE
PRT|THER|RES
Calibration Date
CAL_DATE
string: “<yyyy>-<mm>-<dd>”
Nominal Current
NOM_CURR
decimal number
Maximum Current
MAX_CURR
decimal number
Maximum Temperature
MAX_TEMP
decimal number, dependent on Unit setting
Conversion
CONV
ITS_90|PT_100|CVD_ABC|CVD_ALPH|POLY|NONE
RTPW
RTPW
decimal number
High Subrange
HIGH_SUB
NONE|5|6|7|8|9|10|11
Low Subrange
LOW_SUB
NONE|1|2|3|4|5
A1 – A11
A1 – A11
exponential number
B1 – B9
B1 – B9
exponential number
C1 – C5, C6, C7
C1 – C5, C6, C7
exponential number
D
D
exponential number
R0
decimal number
R0
R0
decimal number
A
A
exponential number
B
B
exponential number
C
C
exponential number
R0
R0
decimal number
ALPHA
ALPH
exponential number
DELTA
DELT
exponential number
BETA
BETA
exponential number
PRT type settings
ITS-90 conversion settings
ITS-90 subrange settings
PT-100 conversion settings
R0
CVD-ABC conversion settings
CVD-ALPHA conversion settings
Polynomial conversion settings
86
Remote Operation
Interface Commands
C0 – C7
C0 – C7
exponential number
Maximum Temperature
MAX_TEMP
decimal number, dependent on Unit setting
Conversion
CONV
R_POLY|T_POLY|NONE
B0 – B3
exponential number
A0 – A3
exponential number
Thermistor type settings
R(T) polynomial conversion settings
B0 – B3
T(R) polynomial conversion settings
A0 – A3
The settings that are applicable to the probe definition depends on the Type setting and Conversion setting, and
may depend on other settings also, such as an ITS-90 subrange.
Any channel that has the probe assigned to it and has Calculation setting set to temperature will have Calculation (see Section 8.7.3.27, CALC<n>:TYPE TEMP|RES|RAT, on page 80) changed to resistance when the
probe’s Type setting is set to resistor or the Conversion setting is set to none.
8.7.3.60
INP:PROB:TEST? <id>,<resistance>
Example command: INP:PROB:TEST? “PRT_A46002”,65.449411
Example response: 419.527,C
Reads the temperature calculated from resistance using the probe definition.
Parameter <id> is the ID of a probe definition in the Probe Library. If <id> does not match the ID of a probe
definition in the Probe Library, error -224,“Illegal parameter value” is generated in the error queue.
Parameter <resistance> is the resistance from which temperature is calculated.
The normal response contains the calculated temperature and the unit, separated by a comma:
<Temperature>,<unit>
The <temperature> value is converted to units determined by the Unit setting (see Section 5.7.4.5, TEMPERATURE UNIT (F5), on page 50). If the probe Type is RESISTOR or Conversion is NONE, the <resistance>
parameter value is returned instead, with <unit> “O” for ohms. If a valid response cannot be returned because
the given resistance is out of range or the probe definition is invalid, no response is given and error -230,“Data
corrupt or stale” is generated in the error queue.
8.7.3.61
INP:REAR<n>:RS:IDEN <id>|VAR|NONE
Example command: INP:REAR1:RS:IDEN “R25_01322”
Example command: INP:REAR2:RS:IDEN NONE
Query form: INP:REAR<n>:RS:IDEN?
Example query response: “R25_01322”
Example query response: VAR
Sets the resistor definition assigned to a rear reference resistor input. (Use the command INP<n>:RS:IDEN to
assign a resistor definition to a front channel input.)
Suffix <n> specifies the rear Rs input number and must be either 1 or 2.
Parameter <id> must be either the ID of a resistor definition in the Resistor Library, “VAR” (variable), or
“NONE”. Enclosing quotations marks are optional. If <id> does not match the ID of a resistor definition in the
Resistor Library or an allowed option, error -224,“Illegal parameter value” is generated in the error queue.
If a valid resistor ID is assigned to the input, the response to the query form is the ID of the resistor enclosed
in quotation marks. If the resistor assignment is variable or none, the response is “VAR” or “NONE” respectively, without quotation marks.
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A channel’s Calculation setting will be changed from temperature to resistance (see Section 8.7.3.27,
CALC<n>:TYPE TEMP|RES|RAT, on page 80) if its Reference Resistor (Rs) setting was set to the specified input and the resistor assignment for the input is set to variable. A channel’s Reference Resistor (Rs)
setting will be changed from the specified input to the internal 100 Ω resistor if the resistor assignment for the
input is being set to none.
8.7.3.62
INP:RS:ADD <id>
Example command: INP:RS:ADD “R25_01322”
Password protection: Resistor Protection
Adds a new resistor definition to the Resistor Library. Before a resistor can be assigned to an input (see commands INP:RS:FRON:IDEN and INP:RS:REAR:IDEN) and used as a reference resistor, the resistor must
have its definition added to the Resistor Library.
Parameter <id> is the ID of the new resistor definition. It can contain letters, numerals, hyphens, periods, forward slashes, and underscores. It must be between one and 22 characters in length, inclusive.
If <id> is different from all other IDs in the Resistor Library and space is available in the Resistor Library, a
new resistor definition will be added and given the specified ID. The resistor parameters will initially be set to
default values. The command INP:RS:PAR should be used to set the parameters.
If <id> matches the ID of a resistor already in the Resistor Library or the Resistor Library is full, no new resistor definition is added, and error -224, “Illegal parameter value” will be generated in the error queue.
8.7.3.63
INP:RS:COUN?
Reads the number of resistor definitions in the Resistor Library.
8.7.3.64
INP:RS:DEL <id>
Example command: CALC:PROB:DEL “R25_01322”
Password protection: Resistor Protection
Deletes a resistor definition from the Resistor Library.
Parameter <id> is the ID of the resistor definition to delete. If <id> does not match the ID of any resistor in the
Resistor Library, nothing is deleted, and error -224, “Illegal parameter value” is generated in the error queue.
If the deleted resistor was assigned to an input (see commands INP:RS:FRON:IDEN and
INP:RS:REAR:IDEN), the input’s reference resistor (Rs) setting will be changed to variable. The Calculation setting for any channel that used the input for its Reference Resistor (Rs) setting will be changed from
temperature or resistance to ratio.
8.7.3.65
INP:RS:FIRS?
Example response: “R25_01322”
Reads the ID of the first resistor in the Resistor Library. It also resets the catalog index used by the
INP:RS:NEXT? command.
If the Probe Library is empty, no response is given and error -230,“Data corrupt or stale” is generated in the
error queue.
8.7.3.66
INP<n>:RS:IDEN <id>|VAR|NONE
Example command: INP2:RS:IDEN “R25_01322”
Example command: INP4:RS:IDEN NONE
Query form: INP<n>:RS:IDEN?
Example query response: “R25_01322”
Example query response: VAR
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Remote Operation
Interface Commands
Sets the resistor definition assigned to a front reference resistor input. (Use the command
INP:REAR<n>:RS:IDEN to assign a resistor definition to a rear Rs input.)
Suffix <n> specifies the front input (channel) number and must be either 2 or 4.
Parameter <id> must be either the ID of a resistor definition in the Resistor Library, “VAR” (variable), or
“NONE”. Enclosing quotations marks are optional. If <id> does not match the ID of a resistor definition in the
Resistor Library or an allowed option, error -224,“Illegal parameter value” is generated in the error queue.
The response to the query form is the ID of the resistor enclosed in quotation marks if a valid resistor ID is assigned to the input. If the resistor assignment is variable or none, the response is “VAR” or “NONE” respectively, without quotation marks.
A channel’s Calculation setting will be changed from temperature to resistance (see Section 8.7.3.27,
CALC<n>:TYPE TEMP|RES|RAT, on page 80) if its Reference Resistor (Rs) setting was set to the specified input and the resistor assignment for the input is set to variable. A channel’s Reference Resistor (Rs)
setting will be changed from the specified input to the internal 100 Ω resistor if the resistor assignment for the
input is being set to none.
8.7.3.67
INP:RS:NEXT?
Example response: “R100_023”
Reads the ID of the next resistor in the Resistor Library. It also advances the library index used for the next
response to the INP:RS:NEXT? command.
If there are no more resistors in the Resistor Library, no response is given and error -230,“Data corrupt or
stale” is generated in the error queue.
8.7.3.68
INP:RS:OVEN:STAB?
Returns the stable condition of the oven. The response is 1 if the temperature is stable and 0 if not.
8.7.3.69
INP:RS:PAR <id>,<name>,<value>
Example command: INP:RS:PAR “R25_01322”,RES,25.001098
Query form: INP:RS:PAR? <id>,<name>
Password protection: Resistor Protection
Sets the value of a setting in a resistor definition.
Parameter <id> is the ID of a resistor definition in the Resistor Library. If <id> does not match the ID of a
resistor definition in the Resistor Library, error -224,“Illegal parameter value” is generated in the error queue.
Parameter <name> specifies the setting to set. Settings and their associated names are listed in the table below
(also see Section 5.7.1.2.1.1.1, DEFINE RESISTOR (F2), on page 31).
8.7.3.70
Setting
<name>
<value> type or options
Resistance
RES
decimal number
Maximum Current
MAX_CURR
decimal number
Calibration Date
CAL_DATE
string: “<yyyy>-<mm>-<dd>”
Due Date
DUE_DATE
string: “<yyyy>-<mm>-<dd>”
INP<n>:RS:ROUT <source>
Query form: INP<n>:RS:ROUT?
Sets a channel’s Reference Resistor (Rs) setting (see Section 5.7.1.2, CHANNEL SETTINGS (F2), on page
30).
Suffix <n> specifies the channel number: 1 through 4 for the corresponding front channel input, 5 through 14
for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner.
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Interface Commands
Parameter <source> may be any of the following:
<source>
Function
1
Selects the internal 1 Ω resistor for the reference resistor
10
Selects the internal 10 Ω resistor for the reference resistor
25
Selects the internal 25 Ω resistor for the reference resistor
100
Selects the internal 100 Ω resistor for the reference resistor
10K
Selects the internal 10 kΩ resistor for the reference resistor
RS1
Selects the rear RS1 input as the source for the reference resistor
RS2
Selects the rear RS2 input as the source for the reference resistor
CH2
Selects the front Channel 2 input as the source for the reference resistor
CH4
Selects the front Channel 4 input as the source for the reference resistor
An input option is not allowed if the resistor assignment for the input is NONE (see Section 8.7.3.61,
INP:REAR<n>:RS:IDEN <id>|VAR|NONE, on page 87 and Section 8.7.3.66, INP<n>:RS:IDEN
<id>|VAR|NONE, on page 88), in which case an error -221, “Settings conflict” is generated in the error
queue. Also, Channel 2 cannot be set to CH2 and Channel 4 cannot be set to CH4.
8.7.3.71
ROUT:CLOS <channel>
Query form: ROUT:CLOS?
Example command: ROUTE:CLOSE (@3)
Example response: (@3)
Selects one channel for measurement.
The lowest channel appearing in <channel list> is enabled, and all other channels are disabled. The Scan
Enable setting is set to OFF (see Section 5.7.3.1, SCAN SETTINGS (F1), on page 39). If measurement is
disabled, the channel will not actually be measured until measurement is started. If measurement of another
channel is in progress, the new channel will not be measured until the measurement completes.
A channel number in <channel list> may be 1 through 4 for the corresponding front channel input, 5 through
14 for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner. If
a scanner is attached, channel 1 is not allowed.
The channel is specified in channel list format, preceded by an @ character, everything enclosed in
parenthesis.
If scanning is on, the query will return an empty channel list.
8.7.3.72
ROUT:CLOS:STAT?
Example response: (@2)
Returns the channel number of whatever channel is actively being measured, whether or not scanning is enabled. If measurement is off, an empty channel list is returned.
8.7.3.73
ROUT:SCAN <channel list>
Example command: ROUTE:SCAN (@1,2,4,6:14)
Query form: ROUT:SCAN?
Example query response: (@1,2,3,4)
Enables channels for scanning.
Each of the channels specified in <channel list> is enabled (this is equivalent to setting each channel ON in the
Channel Menu), and all other channels are disabled. The Scan Enable setting is set to ON (see Section 5.7.3.1,
SCAN SETTINGS (F1), on page 39). If measurement is disabled, the channels will not actually be scanned
and measured until measurement is started.
90
Remote Operation
Interface Commands
A channel number in <channel list> may be 1 through 4 for the corresponding front channel input, 5 through
14 for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner. If
a scanner is attached, channel 1 will not be enabled.
A range of channels may be conveniently included in the channel list by using a colon between the channel
range limits. The query response lists all enabled channels separately. If scanning is off, the query will return
an empty channel list.
The *RST command enables channel 2 and disables all others.
8.7.3.74
ROUT:SCAN:ADD <channel list>
Example command: ROUTE:SCAN:ADD (@5,6,7)
Adds channels to the scan list.
Each of the channels specified in <channel list> is enabled (this is equivalent to setting each channel ON in the
Channel Menu). The Scan Enable setting is set to ON (see Section 5.7.3.1, SCAN SETTINGS (F1), on page
39). If measurement is disabled, the channels will not actually be scanned and measured until measurement
is started.
A channel number in <channel list> may be 1 through 4 for the corresponding front channel input, 5 through
14 for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner. If
a scanner is attached, channel 1 will not be enabled.
8.7.3.75
ROUT:SCAN:ALT <boolean>
Query form: ROUT:SCAN:ALT?
Alternate parameter: DEF
Sets the scan Alternate Reference setting (see Section 5.7.3.1, SCAN SETTINGS (F1), on page 39).
The *RST command sets Alternate Reference to its default setting which is OFF.
8.7.3.76
ROUT:SCAN:DEL <channel list>
Example command: ROUTE:SCAN:DEL (@4)
Removes channels from the scan list.
Each of the channels specified in <channel list> is disabled (this is equivalent to setting each channel OFF in
the Channel Menu).
8.7.3.77
ROUT:SCAN:REF <channel>
Query form: ROUT:SCAN:REF?
Example command: ROUTE:SCAN:REF 4
Sets the scan Reference Channel setting (see Section 5.7.3.1, SCAN SETTINGS (F1), on page 39).
Parameter <channel> is the front channel number to use as the reference, which may be 1 through 4 when no
scanner is attached. If a scanner is attached, the channel 1 option is not available but the scanner channels are
allowed, numbered 5 through 14 for the first scanner, 15 through 24 for the second. The default option is channel 2. For the reference channel to be measured, it must be enabled (see command Channel Menu).
The *RST command sets Reference Channel to 2.
8.7.3.78
ROUT:SCAN:REP <value>
Example command: ROUT:SCAN:REP 10
Query form: ROUT:SCAN:REP?
Alternate parameter: DEF, MIN, MAX
Sets the scan Repeat Count setting (see Section 5.7.3.1, SCAN SETTINGS (F1), on page 39).
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Interface Commands
Parameter <value> is the number of measurements performed on a channel before advancing to the next channel. The range is 1 through 100 and the default is 1.
The *RST command sets Repeat Count to 1.
8.7.3.79
ROUT:SCAN:STAT <boolean>
Query form: ROUT:SCAN:STAT?
Alternate parameter: DEF
Sets the Scan Enable setting (see Section 5.7.3.1, SCAN SETTINGS (F1), on page 39).
The *RST command sets Scan Enable to the default setting which is ON.
8.7.3.80
SENS:APER[:DISP] <time>
Query form: SENS:APER[:DISP]?
Alternate parameter: DEF, MIN, MAX
Password protection: Measure Protection
Sets the measurement or Display Interval (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39).
Parameter <time> is in seconds. Allowed values for <time> are 1, 2, 10, 30, and 60. Values other than these
are rounded down to the nearest allowed value.
The Sample Period setting will be changed if necessary so that it is never greater than the Display Interval
setting.
The *RST command sets Display Interval to the default setting which is 2.
8.7.3.81
SENS:APER:PRES NORM|PREC|FAST|LONG
Query form: SENS:APER:PRES?
Alternate parameter: DEF
Sets the measurement timing settings to preset values (see Section 5.7.3.2, TIMING SETTINGS (F2), on
page 39). This is equivalent to pressing the PRESET NORMAL, PRESET PRECISION, PRESET FAST, or
PRESET LONG function key in the Timing Settings screen. It affects the Sample Period, Display Interval, and
Average Enable settings.
For the query form, if the timing settings match one of the presets, the name of the preset is returned. If the
settings do not match any of the presets, “NONE” is returned.
The *RST command sets the timing settings to the default preset which is NORM.
8.7.3.82
SENS:APER:SAMP <time>
Query form: SENS:APER:SAMP?
Alternate parameter: DEF, MIN, MAX
Password protection: Measure Protection
Sets the measurement Sample Period (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39).
Parameter <time> is in seconds. Allowed values for <time> are 1, 2, 5, and 10. Values other than these are
rounded down to the nearest allowed value.
The Display Interval setting will be changed if necessary so that it is never less than the Sample Period setting.
The *RST command sets Sample Period to the default setting which is 2 seconds.
8.7.3.83
SENS:AVER1[:STAT] <boolean>
Query form: SENS:AVER1?
92
Remote Operation
Interface Commands
Password protection: Measure Protection
Sets the Average Enable for the sample average (see Section 5.7.3.2, TIMING SETTINGS (F2), on page
39).
The *RST command sets Average Enable to the default setting which is ON.
8.7.3.84
SENS:AVER2[:STAT] <boolean>
Query form: SENS:AVER2?
Password protection: Measure Protection
Sets the digital filter’s Filter Enable (see Section 5.7.3.3, DIGITAL FILTER (F3), on page 41).
The *RST command sets Filter Enable to the default setting which is ON.
8.7.3.85
SENS:AVER2:COUN <count>
Query form: SENS:AVER2:COUN?
Alternate parameter: DEF, MIN, MAX
Password protection: Measure Protection
Sets the digital filter’s Average Count setting (see Section 5.7.3.3, DIGITAL FILTER (F3), on page 41).
Parameter <count> is the average count. Allowed values range from 2 through 100.
This setting is only meaningful when Filter Enable is ON.
The *RST command sets Average Count to the default setting, which is 30.
8.7.3.86
SENS:AVER2:CLEA
Clears the digital filter buffer. This is equivalent to pressing the CLEAR FILTER function key in the Digital
Filter screen (see Section 5.7.3.3, DIGITAL FILTER (F3), on page 41).
8.7.3.87
SENS[<n>][:FRES]:DATA?
Example command: SENS4:DATA?
Example response: 44.221571
Reads a channel’s latest resistance measurement.
Suffix <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner. If the
suffix number is omitted, the latest measurement regardless of channel is returned.
If the Calculation setting for the channel is either RESISTANCE or TEMPERATURE (see Section 8.7.3.27,
CALC<n>:TYPE TEMP|RES|RAT, on page 80), a resistance value in ohms is returned. If calculation is
ratio, a resistance ratio value is returned. In either case, the returned value is obtained after processing by the
digital filter.
If no measurement is available, no response is returned and error code -230, “Data corrupt or stale” is generated in the error queue.
8.7.3.88
SENS[<n>]:RRAT:DATA?
Example command: SENS4:RRAT:DATA?
Example response: 1.30244715
Reads a channel’s latest resistance ratio measurement.
Suffix <n> is required, which specifies the channel number: 1 through 4 for the corresponding front channel
input, 5 through 14 for channels of the first attached scanner, and 15 through 24 for channels of the second attached scanner. If the suffix number is omitted, the latest measurement regardless of channel is returned.
93
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Interface Commands
The returned value is a resistance ratio after processing by the digital filter. If no measurement is available, no
response is returned and error code -230, “Data corrupt or stale” is generated in the error queue.
8.7.3.89
STAT:OPER?
Example response: 16
Reads and clears the Operation Status Event Register. This indicates whether a new measurement became
available to read (using FETC?) since the previous STAT:OPER? query. The return value is 16 if a new measurement has been acquired and 0 otherwise. Reading the Operation Status Event Register using this command
clears the register. The register is also cleared when a *CLS or FETC? command is received.
8.7.3.90
STAT:OPER:COND?
Example response: 16
Reads the Operation Status Condition Register. This indicates whether or not measurement is enabled. The
return value is 16 if measurement is enabledand 0 otherwise. Reading the Operation Status Condition Register
does not change it.
8.7.3.91
STAT:OPER:ENAB <value>
Example command: STAT:OPER:ENAB 16
Query form: STAT:OPER:ENAB?
Alternate parameter: DEF
Sets the Operation Status Enable Register. This mask register determines which corresponding bits of the Operation Status Event Register affect the Operation Status Bit (OSB, bit 7) of the Status Byte Register. A value
of 16 enables reporting when a new measurement is acquired. The default setting is 0.
8.7.3.92
STAT:QUES?
Example response: 16
Reads and clears the Questionable Status Event Register. This indicates whether a new measurement that was
erroneous or questionable was acquired since the previous STAT:QUES? query.
The bits in the Questionable Status Event Register correspond to the bits in the Questionable Status Condition
Register and are caused by the same conditions (see Section 8.7.3.93, STAT:QUES:COND?, on page 94).
The difference is the bits in the Questionable Status Event Register remain set after the condition no longer exists. Reading the Questionable Status Event Register using the STAT:QUES? command clears the register. The
register is also cleared when a *CLS command is received.
8.7.3.93
STAT:QUES:COND?
Example response: 16
Reads the Questionable Status Condition Register. This indicates whether the latest measurement was erroneous or questionable.
The return value is 16 if the latest measurement is questionable and 0 otherwise. The Questionable Status
Condition Register is cleared when a new valid measurement is acquired. Reading the Questionable Status
Condition Register does not change it.
8.7.3.94
STAT:QUES:ENAB <value>
Example command: STAT:QUES:ENAB 16
Query form: STAT:QUES:ENAB?
Alternate parameter: DEF
Sets the Questionable Status Enable Register. This mask register determines which corresponding bits of the
Questionable Status Event Register affect the Questionable Status Bit (QSB, bit 3) of the Status Byte Register.
A value of 16 enables reporting of questionable measurements. The default setting is 0.
94
Remote Operation
Interface Commands
8.7.3.95
SYST:BEEP[:IMM]
Example command: SYST:BEEP
Produces an immediate beep from the speaker.
8.7.3.96
SYST:BEEP:KEY <boolean>
Query form: SYST:KEY:BEEP?
Alternate parameter: DEF
Sets the Key Beep setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default setting is
ON.
8.7.3.97
SYST:BEEP:ALER <boolean>
Query form: SYST:KEY:ALER?
Alternate parameter: DEF
Sets the Alert Beep setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default setting is
ON.
8.7.3.98
SYST:CODE:VERS?
Example response: 1.23,1.00,1.10
Reads the firmware code version numbers. The response contains the following:
<UI version>,<kernel version>,<analog version>
8.7.3.99
SYST:COMM:GPIB:ADDR <value>
Query form: SYST:COMM:GPIB:ADDR?
Alternate parameter: DEF, MIN, MAX
Sets the IEEE-488 port’s Address setting (see Section 8.6, Configuring the IEEE-488 Port, on page 69).
8.7.3.100
SYST:COMM:GPIB[:STAT] <boolean>
Query form: SYST:COMM:GPIB?
Sets the IEEE-488 port’s Port Enable setting (see Section 8.6, Configuring the IEEE-488 Port, on page 69).
8.7.3.101
SYST:COMM:GPIB:TERM LIN|RET
Query form: SYST:COMM:GPIB:TERM?
Sets the IEEE-488 port’s Termination setting (see Section 8.6, Configuring the IEEE-488 Port, on page 69).
8.7.3.102
SYST:COMM:SER:BAUD <value>
Query form: SYST:COMM:SER:BAUD?
Sets the serial port Baud Rate setting (see Section 8.5, Configuring the RS-232 Serial Port, on page 69).
8.7.3.103
SYST:COMM:SER:LIN <boolean>
Query form: SYST:COMM:SER:LIN?
Alternate parameter: DEF
Sets the serial port’s Linefeed setting (see Section 8.5, Configuring the RS-232 Serial Port, on page 69).
8.7.3.104
SYST:COMM:SOCK:ADDR <IP address>
Example command: SYST:COMM:SOCK:ADDR “147.120.0.11”
Query form: SYST:COMM:SOCK:ADDR?
95
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Interface Commands
Sets the network port’s IP Address setting (see Section 8.2, Configuring the Network (LAN) Port, on page
65).
Parameter <IP address> is a string specifying the address using IP dot notation.
This setting is only allowed when DHCP is OFF.
The query form returns the static IP address when DHCP is OFF and returns the dynamically assigned IP address when DHCP is ON.
8.7.3.105
SYST:COMM:SOCK:CONT OFF|ON|QUER
Query form: SYST:COMM:SOCK:CONT?
Sets the network port’s Control Enable setting. This determines whether the instrument accepts control commands received via the network port.
Allowed parameter values are OFF, ON, and QUER. When the setting is OFF the network port cannot be used
to control the instrument, and all commands are ignored. When the setting is ON commands may be used to
control and operate the instrument. When the setting is QUER, commands that read settings and data are allowed, but commands that change settings are ignored. The default setting is QUER.
8.7.3.106
SYST:COMM:SOCK:DHCP <boolean>
Query form: SYST:COMM:SOCK:DHCP?
Sets the network port’s DHCP Enable setting (see Section 8.2, Configuring the Network (LAN) Port, on page
65).
8.7.3.107
SYST:COMM:SOCK:GAT <IP address>
Example command: SYST:COMM:SOCK:GAT “147.120.0.1”
Query form: SYST:COMM:SOCK:GAT?
Sets the network port’s Gateway setting (see Section 8.2, Configuring the Network (LAN) Port, on page 65).
Parameter <IP address> is a string specifying the address of the gateway server, using IP dot notation.
This setting is only meaningful when DHCP is OFF.
The query form returns the value of the Gateway setting when DHCP is OFF and returns the dynamically
provided gateway address when DHCP is ON.
8.7.3.108
SYST:COMM:SOCK:KEEP <seconds>
Example command: SYST:COMM:SOCK:KEEP 3600
Query form: SYST:COMM:SOCK:KEEP?
Alternate parameter: DEF, MIN, MAX
Sets the network port’s keep-alive timeout setting.
Parameter <seconds> is the keep-alive timeout value, in seconds.
This setting determines the length of time, in seconds, after which the socket is automatically closed if there is
no activity. At power-on the setting defaults to 60 seconds. If a different timeout is desired, the settings can be
changed using this command. If the setting is set to 0, the keep-alive timeout will be disabled.
The keep-alive timeout may be useful if a connection is dropped unexpectedly, such as if the network or client fails. The network socket of the Super-Thermometer might otherwise remain open indefinately, and no
subsequent socket connection request would be accepted. With the keep-alive timeout enabled, if no activity
is detected during the timeout period, the socket will close automatically, and a new connection will then be
accepted.
In applications where there might normally be a long period between messages, it might be necessary to increase or disable the keep-alive timeout to prevent the connection from being closed automatically.
96
Remote Operation
Interface Commands
8.7.3.109
SYST:COMM:SOCK:MAC?
Example response: “00204A9AF1A2”
Reads the network port’s Hardware MAC address (see Section 8.2, Configuring the Network (LAN) Port, on
page 65).
8.7.3.110
SYST:COMM:SOCK:MASK <IP address>
Example command: SYST:COMM:SOCK:MASK “255.255.255.0”
Query form: SYST:COMM:SOCK:MASK?
Sets the network port’s Subnet Mask setting (see Section 8.2, Configuring the Network (LAN) Port, on page
65).
Parameter <IP address> is a string specifying the subnet mask, using IP dot notation.
This setting is only meaningful when DHCP is OFF.
The query form returns the value of the Subnet Mask setting when DHCP is OFF and returns the dynamically
provided subnet mask when DHCP is ON.
8.7.3.111
SYST:COMM:SOCK:NAME <name>
Example command: SYST:COMM:SOCK:NAME “MY-1595A”
Query form: SYST:COMM:SOCK:NAME?
Alternate parameter: DEF
Sets the network port’s Host Name setting (see Section 8.2, Configuring the Network (LAN) Port, on page
65).
Parameter <name> is a string specifying the Host Name. The string may contain upper-case letters, numerals,
and underscores and may be up to 24 characters in length. Issuing the command with parameter “DEF” sets
the Host Name to the default value, which is “FLUKE-159X-<serial number>”.
8.7.3.112
SYST:COMM:USB[:STAT] <boolean>
Query form: SYST:COMM:USB?
Sets the USB port’s Port Enable setting (see Section 8.4, Configuring the USB Port, on page 68).
8.7.3.113
SYST:CONF:CHAN?
Example response: 4
Reads the number of available channels. The Super-Thermometer by itself has 4 available channels. If one
optional scanner is attached, the number of available channels with be 14. If two optional scanners are attached, the number of available channels will be 24. (Channel 1 is counted even though it is not enabled when
a scanner is attached.)
8.7.3.114
SYST:CONF:SCAN?
Example response: “2590”
Reads the model number of an attached scanner. The model number is enclosed in quotation characters. If no
scanner is attached, the response is an empty string enclosed in quotation characters.
8.7.3.115
SYST:DATE <year>,<month>,<day>
Query form: SYST:DATE?
Example query response: 2009,12,31
Password protection: Time/Date Protection
Sets the Date of the system clock.
97
1594A/1595A Super-Thermometer
Interface Commands
8.7.3.116
SYST:ERR?
Example response: -100,“Command error”
Reads the next error in the error queue. When an error is read it is removed from the error queue, and the next
error may be read by sending the command again. If there are no more errors, the response is 0,“No error”.
The error queue holds ten errors. If the error queue is already full when a new error is generated, the last error
in the error queue is replaced with the error, -350,“Queue overflow”. The error queue may be cleared using the
command *CLS. Possible errors are listed in the following table.
8.7.3.117
Error
Cause
0,“No error”
The error queue is empty.
-100,“Command error”
An unrecognized command was received.
-109,“Missing parameter”
A required parameter was missing.
-114,“Header suffix out of range”
A suffix number was out of range. (This may occur if a channel does not exist
because the scanner is not attached.)
-130,“Suffix error”
A required suffix number is missing.
-200,“Execution error”
A command could not be executed.
-203,“Command protected”
A command could not be executed because a setting is password protected.
-220,“Parameter error”
A command could not be executed because one or more parameters are out of
range or invalid.
-221,“Settings conflict”
A command could not be executed in the current state of the instrument.
-222,“Data out of range”
A command could not be executed because a parameter was out of range, of
the wrong type, or not recognized.
-224,“Illegal parameter value”
A command could not be executed because a parameter was not an allowed
option.
-230,“Data corrupt or stale”
A response could not be returned because valid data is not available.
-330,“Self-test failed”
A self-test failed because of a hardware error.
-350,“Queue overflow”
An error occurred when the error queue was full.
-360,“Communication error”
A communication error occurred, such as a framing error or input buffer
overrun.
-400,“Query error”
A response to a query was not transmitted prior to another command being
received.
SYST:KLOC <boolean>
Query form: SYST:KLOC?
Alternate parameter: DEF
Sets the front-panel key lock.
If the parameter is 1, front-panel keys are inoperable. The key lock remains on until the command is sent with
the parameter 0.
The key lock setting is initially off at power-on. The *RST command sets key lock off.
8.7.3.118
SYST:PASS:CDIS
Disables access to password-protected settings. The SYST:PASS:CEN command may be used subsequently to
enable access.
8.7.3.119
SYST:PASS:CEN <password>
Example command: SYST:PASS:CEN 1234
Enables access to password-protected settings. If <password> is incorrect, error -221,“Settings conflict” is
generated in the error queue. Password access remains enabled until the SYST:PASS:CDIS command is received. Password access is disabled at power-on.
98
Remote Operation
Interface Commands
8.7.3.120
SYST:PASS:CEN:STAT?
Returns the password-access state. The response is 0 if access is disabled and 1 if access is enabled.
8.7.3.121
SYST:PASS:GROU:MEAS <boolean>
Query form: SYST:PASS:GROU:MEAS?
Password protection: unconditional
Alternate parameter: DEF
Sets the password Measure Protection setting (see Section 5.7.7.1, PASSWORD (F4), on page 54). When
Measure Protection is on, settings related to measurement, and their associated commands, are protected.
8.7.3.122
SYST:PASS:GROU:PROB <boolean>
Query form: SYST:PASS:GROU:PROB?
Password protection: unconditional
Alternate parameter: DEF
Sets the password Probe Protection setting (see Section 5.7.7.1, PASSWORD (F4), on page 54). When
Probe Protection is on, settings related to probe definition, and their associated commands, are protected.
8.7.3.123
SYST:PASS:GROU:RES <boolean>
Query form: SYST:PASS:GROU:RES?
Password protection: unconditional
Alternate parameter: DEF
Sets the password Resistor Protection setting (see Section 5.7.7.1, PASSWORD (F4), on page 54). When
Resistor Protection is on, settings related to resistor definition, and their associated commands, are protected.
8.7.3.124
SYST:PASS:GROU:TIME <boolean>
Query form: SYST:PASS:GROU:TIME?
Password protection: unconditional
Alternate parameter: DEF
Sets the password Time/Date Protection setting (see Section 5.7.7.1, PASSWORD (F4), on page 54). When
Time/Date Protection is on, setting the time and date is protected.
8.7.3.125
SYST:PASS:NEW <current password>,<new password>
Example command: SYST:PASS:NEW 1234,9999
Changes the password. If <current password> is incorrect, error -221,“Settings conflict” is generated in the
error queue.
8.7.3.126
SYST:PON:MIN?
Returns the time in minutes since power on.
8.7.3.127
SYST:TIME <hour>,<minute>,<second>
Query form: SYST:TIME?
Example query response: 23,59,59
Password protection: Time/Date Protection
Sets the Time of the system clock.
8.7.3.128
SYST:TIME:DAYL OFF|NAM|EUR
Example command: SYST:TIME:DAYL NAM
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1594A/1595A Super-Thermometer
Interface Commands
Query form: SYST:TIME:DAYL?
Password protection: Time/Date Protection
Alternate parameter: DEF
Sets the Daylight Saving automatic adjust setting (see Section 5.7.5.1, TIME DATE (F1), on page 50).
Allowed parameter values are OFF for no automatic daylight saving adjustment, NAM for adjustment according to the schedule used in North America (the United States, Canada, and Mexico), and EUR for adjustment
according to the schedule used in Europe. The default setting is OFF.
8.7.3.129
TEST:CURR:CONF <channel>,<current>,<polarity>
Query form: TEST:CURR:CONF?
Example query response: 2,1.0,0
Sets the configuration of the sensing current test (see Section 9, Calibration, on page 103).
Parameter <channel> may be 1 through 4, referring to front channels 1 through 4.
Parameter <current> is the driving current.
Parameter <polarity> sets the direction of the current and may be either 0 for forward or 1 for reverse.
8.7.3.130
TEST:CURR[:STAT] <boolean>
Query form: TEST:CURR?
Sets the state of the sensing current test (see Section 9, Calibration, on page 103).
Parameter <boolean> given a value of 1 starts the sensing current test if it is off. A value of 0 stops the sensing
current test if it is on.
During the sensing current test a constant current is sourced at the current terminals of a channel. The channel,
current magnitude, and polarity may be specified using the TEST:CURR:CONF command. While a sensing
current test is in progress, the display shows the Current Test status screen. Also, the 0 bit of the Operation
Status Condition Register is set while the test is in progress, and is cleared when the test is stopped.
A sensing current test is stopped if the *RST command is received.
8.7.3.131
TEST:LIN:ABOR
Cancels Ratio Self-Calibration (see Section 9, Calibration, on page 103).
Ratio Self-Calibration is also canceled if the *RST command is received.
8.7.3.132
TEST:LIN:PAR?
Example response: 0.12,0.05,-0.03,-0.02
Reads the suggested calibration Linearity C<n> parameters (see Section 9, Calibration, on page 103) resulting from the Ratio Self-Calibration.
The response contains the following:
<C1>,<C2>,<C3>,<Zero>
A response is returned only if the Ratio Self-Calibration runs to completion. If no linearity self-test report is
available, error -230,“Data corrupt or stale” is generated in the error queue.
8.7.3.133
TEST:LIN:INIT
Query form: TEST:LIN:INIT?
Starts Ratio Self-Calibration (see Section 9, Calibration, on page 103).
If Ratio Self-Calibration is already in progress, error -213, “Init ignored” is generated in the error queue.
While Ratio Self-Calibration is in progress, the display shows the Ratio Calibration status screen.
100
Remote Operation
Interface Commands
The query form returns 1 if Ratio Self-Calibration is in progress, 0 otherwise.
8.7.3.134
TEST:LIN:REP<n>?
Example response: 0.00000002,0.00000001,0.00000002,0.02,0.003
Reads a report from Ratio Self-Calibration (see Section 9, Calibration, on page 103).
Suffix <n> specifies the test number of which a report is requested:
<n>
Linearity self-test type
1
zero check
2
compliment check
3
equal ratio sum, 100% scale
4
equal ratio sum, 90% scale
5
equal ratio sum, 75% scale
6
equal ratio sum, 60% scale
7
equal ratio sum, 50% scale
8
unequal ratio sum
The normal response contains the following:
<result A>,<result B>,<combined>,<error>,<std error>
<result A> is the mean measurement from the first part of the test.
<result B> is the mean measurement from the second part of the test.
<combined> is the combined result of the two parts.
<error> is the difference between <combined> and the expected value, in units of 1×10-6.
<std error> is the standard error of <error>, in units of 1×10-6. The standard errors of <result A> and <result
B> are calculated by dividing their standard deviations by the square root of the sample size, and then the two
values are combined using a root-sum-square calculation.
A report is available only if the Ratio Self-Calibration runs to completion. If no report is available, error
-230,“Data corrupt or stale” is generated in the error queue. If the power is switched off and then on again, the
values <result A>, <result B>, and <combined> will no longer be available and will be missing in the command response.
8.7.3.135
TEST:LIN:REP:TIME?
Example response: 2009-06-24 14:30:48
Reads the date and time of the most recent Ratio Self-Calibration report (see Section 9, Calibration, on page
103). The date is in the format YYYY-MM-DD. The time is in 24-hour format. If Ratio Self-Calibration has
not yet compled, error -230,“Data corrupt or stale” is generated in the error queue.
8.7.3.136
TEST:LIN[:STAT]?
Example response: 5
Reads the state of the Ratio Self-Calibration (see Section 9, Calibration, on page 103).
A non-zero response indicates calibration is in progress, and the value designates which test number is in progress. The response is 0 calibration is not running.
8.7.3.137
TEST:LIN:TIME?
Example response: 205
Reads the time remaining of the Ratio Self-Calibration. The time remaining is a number of seconds.
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1594A/1595A Super-Thermometer
Interface Commands
8.7.3.138
TEST:LIN:TOL<n>?
Example response: 0.8
Reads a Ratio Self-Calibration test tolerance (see Section 9, Calibration, on page 103).
Suffix <n> specifies the test number of which the error tolerance is requested (see Section 8.7.3.134,
TEST:LIN:REP<n>?, on page 101).
The response has units of 1×10-6.
8.7.3.139
TEST:SYST:ABOR
Cancels a system self-test (see Section 9, Calibration, on page 103).
A system self-test is also canceled if the *RST command is received.
8.7.3.140
TEST:SYST:INIT
Starts a system self-test (see Section 9.2, SYSTEM TEST (F1), on page 103).
If a system self-test is already in progress, error -213, “Init ignored” is generated in the error queue. While a
system self-test is in progress, the display shows the System Test status screen. Also, the 0 bit of the Operation
Status Condition Register is set while the test is in progress, and is cleared when the test ends or is aborted.
8.7.3.141
TEST:SYST:REP[<n>]?
Example response: 0
Reads the report from a system self-test.
Parameter <n>, when given a value of 1 or omitted, specifies the report from the power-on system self-test. A
value of 2 specifies the report from the latest system self-test if one was performed subsequent to the power-on
system self-test and a system self-test is not in progress. A report only becomes available if the system self-test
runs to completion. If no report is available, error -230,“Data corrupt or stale” is generated in the error queue.
The response is 0 if no errors occurred.
8.7.3.142
TEST:SYST:STAT?
Example response: 1
Reads the state of the system self-test (see Section 9.2, SYSTEM TEST (F1), on page 103).
A response of 1 indicates a test is in progress, 0 otherwise.
8.7.3.143
UNIT:TEMP C|K|F
Example command: UNIT:TEMP C
Query form: UNIT:TEMP?
Alternate parameter: DEF
Sets the temperature Unit (see section Unit). The option F (Fahrenheit) will not be available if The SI Unit
Lock setting is ON (see Section 9.6, CALIBRATION PARAMETERS (F5), on page 108).
The *RST command sets Unit to the default setting which is C.
102
Calibration
CURRENT TEST (F2)
9 Calibration
9.1 Introduction
This section explains the step-by-step instructions for calibrating and verifying functionality of the SuperThermometer to ensure it will operate correctly and meet published specifications. If the instrument cannot be
brought into specification using these instructions, contact the nearest Fluke Authorized Service Center.
A complete Super-Thermometer calibration is comprised of four parts; Self Test, Ratio Self-Calibration, Internal Resistor Calibration, and Current Test. The user may perform all four parts or only a single part if desired.
Built-in functions automate all of the test and calibration steps except Current Test. The functions are found in
the Calibration menu. Go to the Calibration menu by pressing the MENU key then the SYSTEM MENU (F5)
function key followed by the CALIBRATION (F5) function key.
The unit should be allowed to warm up for at least 30 minutes before performing any calibration.
Self Test can be performed at any time during or after the warm up period.
IMPORTANT: Make sure the OVEN indicator on the Measurement Screen shows READY before performing
any calibration.
9.2 SYSTEM TEST (F1)
System Test performs several internal functionality tests and reports the results. It is not necessary to allow the
Super-Thermometer to pass through the required warm-up period before performing this test.
To run System Test, press the SYSTEM TEST (F1) function key. Press the START (F1) function key to begin
the system self-test. As the test proceeds, the screen indicates the time remaining. The user may press the
CANCEL (F5) function key or EXIT key to cancel the test. When the test is finished, the results are displayed.
If a failure is indicated, contact the nearest Fluke Authorized Service Center.
9.3 CURRENT TEST (F2)
The Current Test allows the user to test the sensing current by applying non-reversing current to the front
panel measurement input channels. This is a verification test only, no adjustment is made. It is recommended
to measure at least 0.01 mA, 1.0 mA and 1.414 mA on each front panel measurement input channel.
The current can be verified using a current meter or a calibrated 4-wire resistor and digital voltmeter (DVM).
If using a current meter, connect the meter in series with the C1 and C2 terminals on one of the input channels
as shown in Figure 18.
Figure 18 Current meter connection diagram
103
1594A/1595A Super-Thermometer
RATIO CALIBRATION (F3)
If using a calibrated resistor, connect the resistor to all four terminals on one of the front panel measurement
inputs and connect the voltmeter to the P1 and P2 terminals. Refer to Table 20 for recommended resistance
values. The accuracy of the DVM should be better than 0.05 % over the range of 0.02 V to 0.2 V.
Table 20 Recommended Resistors For Testing The Current
Current
Resistor
0.001 mA to 0.02 mA
10 kW
0.02 mA to 0.2 mA
1 kW
0.2 mA to 2.0 mA
100W
2.0 mA to 20.0 mA
10 W
To start the test, press the CURRENT TEST (F2) function key located in the Calibration menu. The following
fields are used to configure each step of the test.
CHANNEL - the input channel being tested
CURRENT - the sensing current value
POLARITY - specifies the direction of the sensing current, either forward or reverse
Select the START (F1) function key to begin the current test. Constant current is applied to the specified channel allowing current measurements to be measured by the current meter or voltage readings to be taken across
the resistor. During current test, the channel’s LED indicator is illuminated green. The channel, current, and
polarity may be changed during the test.
Current Test is stopped by pressing the STOP (F1) function key or the EXIT key. This switches off the sensing
current allowing the user to connect a different resistor or change any of the configuration fields. Press the
EXIT key to leave the test screen.
If using the calibrated resistor and voltmeter method, calculate the actual current by dividing the measured
voltage by the value of the resistor. The difference between the actual measured current and the current setting
should be within the measurement current accuracy. If the current is not within specification, contact the nearest Fluke Authorized Service Center for more information.
9.4 RATIO CALIBRATION (F3)
The Ratio Self-Calibration function allows the user to perform a ratio linearity check or calibration using an
internal resistor network. No other test equipment is required. Due to the simplicity and short time the test
takes to run, Ratio Self-Calibration can be performed as often as needed.
Caution: Ratio Self-Calibration does not test resistance accuracy or calibrate the internal reference resistors.
Running the Ratio Self-Calibration function does not require a password. This is because it reports the results
of the linearity test only. If adjustment is needed, the Adjust Parameters function is used. This function requires a password because it will adjust internal calibration constants.
The START (F1) function key begins the Ratio Self-Calibration. As the test proceeds, the screen reports the
results of each part of the test. The user may press the CANCEL (F5) function key or EXIT key to cancel the
test.
The following is a description of each segment of Ratio Self-Calibration:
Test 1 (Zero) - This test evaluates offset errors at a resistance ratio of 0. A 0 Ω resistor is internally connected
as Rx, and a 100 Ω resistor is connected as Rs. The test is performed twice, the measurements reported as result A and result B. The combined result is an average of the two. Ideally the measured resistance ratio would
be exactly 0.0. The reported error is the difference of the combined result from 0.0, in units of 1×10-6.
Test 2 (Complement) - This test evaluates scale errors at a resistance ratio near 1. The test has two parts. For
the first part, a 100 Ω resistor is internally connected as Rx, and another 100 Ω resistor is connected as Rs. The
first measured resistance ratio is reported as result A. For the second part, the two resistors are exchanged. The
second measured resistance ratio is reported as result B. The combined result is the product of the two mea104
Calibration
RATIO CALIBRATION (F3)
sured resistance ratios. Ideally the product would be exactly 1.0. The reported error is half the difference of the
combined result from 1.0, in units of 1×10-6.
Test 3 (Equal ratio sum--100% scale) - This test evaluates linearity errors at a resistance ratio near 0.5 with
the measurement circuit operating at full scale. The test has two parts. For the first part, one resistor of a 100
Ω + 100 Ω resistor network is connected as Rx, and the series combination of the two resistors is connected as
Rs internally. The first measured resistance ratio is reported as result A. For the second part, the opposite of the
two resistors is connected as Rx and again, the series combination is connected as Rs. The second measured
resistance ratio is reported as result B. Ideally the sum of the two measured resistance ratios would be exactly
1.0. The reported error is the difference of the sum from 1.0, in units of 1×10-6.
Test 4 (Equal ratio sum--90% scale) - This test evaluates linearity errors at a resistance ratio near 0.5 with
the measurement circuit operating at 90% of full scale. The test is performed in the same way as Test 3, except
the measurement circuit gain is reduced so that the circuit operates at the reduced scale. The reported error is
the difference of the sum from 1.0, in units of 1×10-6.
Test 5 (Equal ratio sum--75% scale) - This test evaluates linearity errors at a resistance ratio near 0.5 with
the measurement circuit operating at 75% of full scale. The test is performed in the same way as Test 3, except
the measurement circuit gain is reduced so that the circuit operates at the reduced scale. The reported error is
the difference of the sum from 1.0, in units of 1×10-6.
Test 6 (Equal ratio sum--60% scale) - This test evaluates linearity errors at a resistance ratio near 0.5 with
the measurement circuit operating at 60% of full scale. The test is performed in the same way as Test 3, except
the measurement circuit gain is reduced so that the circuit operates at the reduced scale. The reported error is
the difference of the sum from 1.0, in units of 1×10-6.
Test 7 (Equal ratio sum--50% scale) - This test evaluates linearity errors at a resistance ratio near 0.5 with
the measurement circuit operating at 50% of full scale. The test is performed in the same way as Test 3, except
the measurement circuit gain is reduced so that the circuit operates at the reduced scale. The reported error is
the difference of the sum from 1.0, in units of 1×10-6.
Test 8 (Unequal ratio sum) - This test evaluates linearity errors at resistance ratios near 0.25 and 0.75 (with
the measurement circuit operating at full scale). The test is performed in the same way as Test 3, except the
two resistors are 25 Ω and 75 Ω. The reported error is the difference of the combined result from 1.0, in units
of 1×10-6.
All tests use a sensing current of 1.0 mA. The timing settings are temporarily set to provide measurements at
two-second intervals and the digital filter is disabled. The reported measurement of each test is the mean of a
set of measurements of the resistance ratio under certain conditions.
For each test a standard error of the mean is calculated and reported. This provides an estimate of the uncertainty of the mean of the reported error due to measurement noise. The standard error of the mean is calculated
from the standard deviation (SA, SB) of parts A and B and the sample count (n) using the following equation:
SE =
1
a
S A2 + S B2
× 106
n
The sample count is the number of samples comprising the result from each part of the test. The divisor a is
2 for Test 1 and Test 2, accounting for the fact that the reported error is calculated as an average from the two
test parts. For the other tests a = 1.
When the Ratio Self-Calibration completes, the time and date (when the last test ended) are shown below the
test results.
To view the test report screen, the user presses the VIEW REPORT (F1) function key. The report screen shows
the specified tolerance, test result error, condition (the percent error relative to the tolerance), and the standard
error of the test result error for each individual test. The tolerances shown are based on the 99% confidence
level resistance ratio specifications found in the Specifications section.
The Ratio Self-Calibration report data are stored in internal non-volatile memory, overwriting the results of
any previous Ratio Calibration. The report of the most recent Ratio Self-Calibration may be viewed at any
time using the VIEW PREVIOUS (F2) function key in the Ratio Calibration screen.
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1594A/1595A Super-Thermometer
RESISTANCE CALIBRATION (F4)
The reported data of the Ratio Self-Calibration may be written to a file on a USB memory device using the
WRITE FILE (F1) function key in the View Report screen (see Write File below).
The calibration parameters associated with measurement linearity may be adjusted to improve the accuracy if
necessary using the ADJUST PARAMETERS (F2) function key (see Adjust Parameters below).
The following function keys are found in the View Report screen.
9.4.1 WRITE FILE (F1)
The Write File function allows the user to write the Ratio Self-Calibration report to a file on the USB memory
device.
The user may change the file name by pressing the ENTER key to open the Alpha-Numeric interface and
entering a file name. Once the file name is set, and after the USB memory device is inserted into the front
USB port, the user presses the CONTINUE (F1) function key to proceed to write the file. The file is stored in a
folder named “\159x\test”. If the file already exists, the new test results are added to the file.
The results of each individual test in a Ratio Self-Calibration are written to the file as follows:
LINEARITY,<test>,<tolerance>,<error>,<% of tol>,<SE>,<date and time>
<test> is the test number, 1 through 8
<tolerance> is the specified tolerance in units of 1×10-6
<error> is the error in units of 1×10-6
<% of tol> is the absolute value of the error divided by the tolerance, expressed in percent
<SE> is the standard error of the test result error in units of 1×10-6
<date and time> is the date and time of the test. The date is in the format YYYY-MM-DD. The time is in 24hour format.
9.4.2 ADJUST PARAMETERS (F2)
The Adjust Parameters function allows the user to update the linearity parameters (LINEARITY C1, LINEARITY C2, LINEARITY C3, and LINEARITY C4) to correct error observed during the Ratio Self-Calibration.
The Adjust Parameters function is always password protected. The user will be prompted to enter the correct
password to continue.
The screen shows the previous values of the calibration parameters and proposed new values based on calculations using the Ratio Calibration test results. The user presses YES (F4) to change the values of the linearity
parameters in memory. The user may press the NO (F5) function key or the EXIT key to cancel the change.
When completed, the linearity calibration parameters will be automatically adjusted to correct for the errors observed during the Ratio Self-Calibration. The linearity parameters may be viewed in the Calibration
Parameters screen (see Calibration Parameters section). Ratio Self-Calibration should be repeated to verify the
calibration.
9.5 RESISTANCE CALIBRATION (F4)
The Resistance Calibration function allows the user to test and calibrate each of the internal reference resistors. It requires a calibrated standard resistor of approximately the same resistance as the internal resistor that
will be calibrated.
No password is required to run Resistance Calibration since it first measures an internal resistor without making any adjustment to its internal calibration parameter. After an internal resistor is measured, the results are
displayed allowing the user to observe the results and decide if an adjustment is necessary.
Resistance Calibration works by measuring an internal resistor against a calibrated standard resistor. The internal resistor’s calibration parameter is adjusted to correct for error.
106
Calibration
RESISTANCE CALIBRATION (F4)
To properly calibrate a Super-Thermometer internal resistor, the expanded uncertainty (k = 2) of the standard
resistor should be no greater than 25% of the 95% confidence level, 1-Year Absolute Resistance Accuracy
specifications. Its resistance should be approximately the same as that of the internal reference resistor being
calibrated, which will result in the least measurement noise and best test uncertainty. The standard resistor may
be connected to any one of the four front-panel measurement channels.
To set up the resistance calibration, the user must configure the following fields displayed in the Resistance
Calibration screen:
RESISTOR - specifies the internal reference resistor to be measured
CHANNEL - is the front channel input to which the standard resistor is connected.
STANDARD RESISTANCE - is the calibrated resistance value of the standard resistor.
The START (F1) function key begins the resistance calibration. As the test proceeds, the screen indicates the
status of the process. The user may press the CANCEL (F5) function key or EXIT key to cancel the test.
The resistance calibration uses the sensing current for which the resistor’s Absolute Resistance Uncertainty
is specified. During the resistance calibration the digital filter is disabled and the timing is set to the Precision
settings so that results will be consistent and accurate. Normal temperature measurement and data recording is
suspended. Settings are automatically restored after the test. The reported measurement is the mean of a series
of samples of the resistance acquired over a period of about 1 min.
When the measurement is completed, the screen shows the results, which includes the following:
MEASUREMENT - is the measured resistance of the standard resistor. This may be compared to the calibrated resistance of the standard resistor to provide an indication of the accuracy of the internal reference resistor.
ABSOLUTE ERROR - is the difference between the measurement and the Standard Resistance value, presented in ohms.
RELATIVE ERROR - is the difference between the measurement and the Standard Resistance value, divided
by the Standard Resistance and multiplied by a factor of one million to produce a value in parts per million
(ppm).
STANDARD ERROR - is the standard deviation of the samples comprising the measurement, divided by
the square root of the number of samples. This provides an estimate of the standard uncertainty of the measurement mean due to measurement noise. It does not include uncertainty of the calibrated resistance of the
standard resistor.
TIME - is the time at which the test ended, taken from the system clock. It is in 24 hour format.
DATE - is the date on which the test ended, taken from the system clock. It is in the format specified by the
Date Format setting in the User Settings screen.
Tolerances for the reported error, which are required for assessing pass or fail conditions, may be found in the
Absolute Resistance Uncertainty section of the Specifications section.
The results of the resistance calibration may be written to a file on a USB memory device using the WRITE
FILE (F1) function key as explained below.
The calibration parameter associated with the calibrated internal reference resistor may be adjusted to improve
the accuracy of the resistor using the ADJUST RESISTOR (F2) function key as explained below.
9.5.1 WRITE FILE (F1)
The Write File function allows the user to write the results of the resistance calibration to a file on the USB
memory device.
The user may change the file name by pressing the ENTER key and using the Alpha-Numeric Interface. Once
the file name is set, and after the USB memory device is inserted into the front USB port, the user presses the
CONTINUE function key to proceed to write the file. The file is stored in a folder named “\159x\test”. If the
file already exists, the new test results are added to the file.
107
1594A/1595A Super-Thermometer
CALIBRATION PARAMETERS (F5)
The results of the resistance calibration are written to the file as follows:
RESISTANCE,<Rs>,<chan>,<standard>,<measurement>,<error>,<SE>,<date and time>
<Rs> is the nominal resistance of the internal reference resistor (in Ω).
<chan> is the channel number to which the standard resistor was connected.
<standard> is the calibrated resistance of the standard resistor.
<measurement> is the measured resistance of the standard resistor.
<error> is the error of the measurement compared to the calibrated resistance of the standard resistor, in units
of ohms.
<SE> is the standard error of the reported error, in units of ohms.
<date and time> is the date and time of the test. The date is in the format YYYY-MM-DD. The time is in 24hour format.
9.5.2 ADJUST RESISTOR (F2)
The Adjust Resistor function allows the user to apply an adjustment to an internal reference resistor’s calibration parameter to improve its accuracy based on the results of the resistance calibration.
The Adjust Resistor function is always password protected. The user will be prompted to enter the correct
password to continue.
The Adjust Resistor screen shows the resistor that will be adjusted, the prior value of its calibration parameter,
and the new value of the calibration parameter. The user presses YES (F4) to change the calibration parameter.
The user may press the NO (F5) function key or the EXIT key to cancel the change.
When the calibration parameter is updated, the Calibration Date setting is also updated to the present date (see
Calibration Parameters in the Menus and Screens section). This can be overwritten by manually entering a
date and pressing the EXIT key to save the value.
9.6 CALIBRATION PARAMETERS (F5)
The calibration parameters may be viewed or adjusted by pressing the Calibration Parameters (F5) function
key. If a password is not entered, the user will be allowed to only view the parameters. Adjustment cannot take
place unless a password is entered. It is recommended to only adjust the calibration parameters as part of the
previously described calibration functions. Failure to enter the calibration parameters correctly will cause the
Super-Thermometer to measure with error.
If it is required to manually adjust the calibration parameters, press the ENTER key to save each change.
See the Ratio Calibration and Resistance Calibration sections for more information on the resistance calibration parameters and linearity calibration parameters.
The SI UNIT LOCK setting is used to enable or disable °F as an allowed temperature unit option. When this is
set to ON, temperatures may be displayed in units of °C and K only, and °F will not be available as an option
for the Unit setting (see System Menu, Temperature Unit, in the Menus and Screens section)
9.6.1 Calibration Interval
Ratio Self-Calibration can be performed as often as needed to ensure proper ratio performance. Since no additional equipment is needed for Ratio Self-Calibration, it can be performed at the user’s convenience, as often
as necessary. Minimally, it should be checked every 6 months during the first year of use and an alignment
performed as needed.
Internal Resistor Calibration should be performed on a 6-month interval during the first year of use. After the
first year, a 12-month interval is recommended.
108
Calibration
CALIBRATION PARAMETERS (F5)
9.6.2 Standby Current Check
It may be necessary to check standby current to ensure proper operation. The standby current must be manually checked. Each channel’s standby current can be checked with the following steps.
NOTE: If a scanner is connected, channel 1 will not be available to test. Power off the SuperThermometer and disconnect the scanner in order to test standby current on channel 1.
1. Connect a 100 Ω resistor to channel 1.
2. Press the SETUP key and disable all other channels except channel 4.
3. Highlight Channel 1 and press CHANNEL SETTINGS (F2). Set REFERENCE RESISTOR to 100 Ω.
Set SENSING CURRENT to 1.0 mA. Set STANDBY CURRENT to ON.
4. Press and hold the EXIT key to return to the Measurement screen. Select the START MEASUREMENT
(F1) function key. The Channel Select Key should be amber above channel 1 and green above channel
4. The amber color indicates the channel is in the standby current mode. The current can now be
measured by inserting a current meter in series between the C1 or C2 terminal and the 100 Ω resistor
lead. An alternative method is using a volt meter to measure the voltage drop across the 100-ohm
resistor and then compute the current.
5. Calculate the difference (or error) between the actual 1.0 mA and the measured readings. Error should
be less than +/- 0.05 mA.
6. Repeat steps 1 through 5 for the other channels.
109
Maintenance

10 Maintenance
Avoid operating the instrument in excessively wet, oily, dusty, or dirty environments. If the outside of the
instrument becomes soiled it may be wiped clean with a damp cloth and mild detergent. DO NOT use harsh
chemicals on the surface that may damage the paint or plastic.
●●
●●
●●
The instrument should be handled with care. Avoid knocking, dropping, or vibrating the instrument.
This instrument is tested and calibrated at the factory. Continued regular testing and calibration is
recommended.
Routinely check the ratio accuracy using the Ratio Self-Calibration function.
111
Troubleshooting

11 Troubleshooting
The purpose of this section is to help the user troubleshoot unexpected operation results. Use the following list
of problems and solutions to troubleshoot the issue. If the issue cannot be resolved using this section, contact
the nearest Fluke Authorized Service Center for additional support.
Problem
Solution
Failure to produce valid measurements
Check probe wiring. Use an ohmmeter to check continuity of the 4-wire
connection to the probe. Verify that one common pair of the 4-wire connection
is connected to P1 and C1 terminals while the other pair is connected to the P2
and C2 terminals.
Make sure the probe or resistor is connected to the same channel indicated by
the channel number in the upper left hand corner of the screen. Check to make
sure the correct reference resistor is selected. If an external reference resistor is
selected, ensure it is connected to either Rs1 or Rs2 on the back panel or either
channel 2 or 4 on the front panel.
Check the reference resistor definition to ensure it has been correctly
configured.
Try connecting a resistor or shorting the input to see if it measures. Try setting
the conversion to resistance first.
If the Super-Thermometer is able to measure resistance correctly but displays
“. . . . . . . . . .” for temperature, there may be an error with the conversion type or
characterization coefficients. Check these carefully. The resistance of the probe
may be outside the range of the selected conversion type and coefficients.
Make sure probe leads are not shorted to other DWF connectors.
Run System Test to ensure the hardware is working properly. If System Test
does not pass, contact the nearest Fluke Authorized Service Center.
Multiple channels are enabled but only
one channel measures.
To measure multiple channels the unit must have the scan function enabled.
Turn on Scan Enable in the Scan Settings screen of the Measure menu.
Excessive measurement noise
The current may be too low. Check the current setting by pressing the SETUP
key and viewing the excitation current setting for each channel.
The reference resistor selection may be incorrect. Check the assigned reference
resistor for each channel by pressing the SETUP key and viewing the Rs
selection.
A faulty measurement connection can be a source of noise. Check the
connection by gently tugging the connector on each wire and inspecting for
possible wire breaks.
The digital filter may not be configured correctly.
The Timing Settings may be too fast. Try setting the Sample Period to a longer
setting. This may also help when scanning multiple channels.
Make sure there are no strong sources of electromagnetic interference near the
Super-Thermometer or devices connected to it. Use measurement cabling that
is shielded. Attach the shield wire of the cable to the Ground DWF connector.
Try attaching a ground wire between the Ground DWF connector on the SuperThermometer and the chassis of the temperature source.
Room temperature variations or air drafts near the Super-Thermometer may
cause measurement instability. Locate the instrument in a stable environment.
113
1594A/1595A Super-Thermometer

114
Problem
Solution
Poor accuracy
The current may be too low causing poor signal to noise ratio or too high
causing excessive self-heating. Check the current setting by pressing the
SETUP key and viewing the excitation current setting for each channel.
The reference resistor selection may be incorrect. Check the assigned reference
resistor for each channel by pressing the SETUP key and viewing the Rs
selection.
The Timing Settings may be too fast. Try setting the Sample Period to a longer
setting. This may also help when scanning multiple channels.
The temperature conversion type or probe characterization coefficients may be
in error. Check each of the probe parameters carefully. Use the Test Calculation
function and compare the results with the probe’s calibration report table.
Make sure probe leads are not shorted to other DWF connectors.
Verify the reference resistor calibration value is entered correctly.
Make sure the probe wires are properly and tightly connected
If using extremely long measurement cables, the capacitance in the wires can
affect the readings. Try setting the measurement timing parameter sample
period to the longest setting to allow for the measurement to settle.
Check the oven stability indicator on the Measurement screen. After 30 minutes
from power up the indicator should change from SETTLING to READY. If the
oven stability indicator never changes to READY, contact a Fluke Authorized
Service Center. The unit could still be used with an external reference resistor
since the internal oven has no affect when using external resistors.
Graph of measurements jumps or stairsteps
This is normal if the temperature being measured is increasing or decreasing
faster than the digital filter is able to track. To eliminate this effect, temporarily
disable the digital filter.
The display shows negative resistance.
The measurement cable is not connected correctly.
The USB memory stick does not work
Plug the memory stick into the front panel USB port and wait for about 10
seconds for the system to recognize the device. When recording data to the
memory stick wait for the flashing read/write LED on the memory stick to stop
flashing before removing it.
Make sure the memory stick id formatted to Fat 32. This can be done by
inserting the memory stick into a personal computer and right clicking on the
drive letter of the memory stick and selecting properties.
Make sure the memory stick is compatible with the Linux operating system 2.6
or greater.
Unit will not power up.
Make sure the main power switch located on the back of the unit is turned on
Check the fuses in the back of the unit
Check the power cord
The display is in the wrong language
If the Super-Thermometer is inadvertently set to the wrong language the user
can open the User Settings screen in English by pressing and releasing the
ENTER key and then pressing and releasing the SETUP key. Select the correct
language if necessary.
Screen is blank
The screen saver may be on. Press any button to turn the screen back on.
The system may be in standby. Press and release the Power Standby key on the
front panel to bring the unit out of standby mode.
Keypad does not respond
The keypad has been locked by a remote operation command. The keypad can
be unlocked by sending the following command to unlock it.
SYST:KLOC 0
Resistance statistics field is blank when
measuring in ratio mode
When in ratio mode, the Super-Thermometer will not produce a resistance
reading. If both measurements are required, set the Super-Thermometer to
measure resistance and select ratio as one of the statistics fields.


Index
Symbols
1.4142 30, 43
10/100 Base T Ethernet 65
24-hour format 50
2590 Scanner 20
°C 50, 56, 108
°F 50, 56, 108
A
ABSOLUTE ERROR 107
Absolute Resistance Accuracy 7
Accuracy
Measurement Current 7
Resistance 7
AC power 9
Active Channel 27
ADD PROBE (F1) 34
ADD RESISTOR (F1) 31
ADDRESS 52, 69
ADJUST PARAMETERS (F2) 106
ADJUST RESISTOR (F2) 108
Alert Beep 95
ALERT BEEP 47, 57
alert message 27, 81
ALPHA 35, 86
Alpha-Numeric Interface 23
Alternate Reference 91
ALTERNATE REFERENCE 39
Applying the Specifications 9
arrow keys 18, 23
ASCII 70
ASCII code 10 52
ASSIGN PROBE (F1) 29, 61
ASSIGN RESISTOR (F1) 31
ASTM-E-1137 35
Audio Indication 83
AUDIO INDICATION 40, 44
Authorized Service Centers 2
AUTOMATIC CENTERING 49
AUTOMATIC SCALING 49
average 77
Average Count 93
AVERAGE COUNT 41
AVERAGE ENABLE 40
Averaging 39
B
banana jacks 58
bare wire 58
baud rate 51, 69, 95
BETA 35, 86
brightness 47, 57
C
C1 59
C2 59
CALCULATION 30
Calibrating an SPRT 12
calibration 103
internal resistors 106
linearity 104
calibration date 76
Calibration Date 50, 86, 89
CALIBRATION DATE 31, 35, 56
CALIBRATION (F5) 55
Calibration Interval 108
CALIBRATION PARAMETERS (F5) 55, 108
CANCEL (F1) 45
CANCEL (F5) 36
CAN/CSA 22.2 No 61010.1-04, Pollution Degree 2 1
carriage return 52
Carry-handle Kit 15
Case 15
Ch2 90
Ch4 90
CHANNEL 44, 45, 104, 107
Channel Select Key 18, 29
CHANNEL SETTINGS (F2) 30, 61
CHANNEL SETUP 28
CHANNEL SETUP (F1) 29
Chinese 15, 19, 47, 82
CLEAR ERRORS (F1) 52
CLEAR FILTER (F1) 41
CLEAR GRAPH/CLEAR MESSAGE (F4) 28
CLEAR INTERFACE (F1) 69
COMBINED GRAPH 49
Combining the Uncertainties 12
Command Syntax 70
COMPUTER 21, 65
CONFIG (F3) 52
Configuring an External Reference Resistor 62
Connecting a Probe 58
Control Enable 96
CONTROL ENABLE 52
Conversion 86
CONVERSION 35, 40
COPY PROBE (F2) 36
Countdown Timer 27
CURRENT 26, 104
Current Test 103
CURRENT TEST (F2) 55, 103
CVD-ABC 35, 86
CVD-ALPHA 35, 86
D
Data/Graph Section 27
Date 50
DATE 45, 48, 50, 58, 107
Date Format 50, 81
115
1594A/1595A Super-Thermometer

DATE FORMAT 47, 57
Daylight Saving 100
DAYLIGHT SAVING 51, 58
DECIMAL FORMAT 47, 57
decimal point 18
Decimal setting 81
DEFINE RESISTOR (F2) 31
DEL 23
DELETE 24
DELETE CONFIG (F3) 54
DELETE key 18
DELETE PROBE (F5) 38
DELETE RESISTOR (F5) 33
delta 80
DELTA 35, 48, 86
DELTA CHANNEL 49
Delta Mode 80
DELTA MODE 49
Delta Offset 80
DELTA OFFSET 49
Depth 9
DHCP 51, 65, 96
DHCP ENABLE 51, 66
dielectric absorption 40
digital filter 93
Digital Filter 41
Digital Filter Description 41
DIGITAL FILTER (F3) 41
Dimensions 9
display 47
Display 19
DISPLAY BRIGHTNESS 47, 57
DISPLAY INTERVAL 40
Display Menu 46
DISPLAY MENU 29
DISPLAY MENU (F4) 46
dR/dT 11
DRIFT 45
dT/dW 11
Due Date 89
DUE DATE 31
DVD 15
dW/dT 11
DWF connectors 58
E
Earth Ground 22
EDIT PROBE (F3) 36
EDIT RESISTOR (F2) 32
EN 61010-1 {2nd Edition} 1
English 15, 19, 47, 82
ENTER 18, 23
EOI 52, 69
ERASE DATA (F5) 43
ERRORS (F5) 52
Ethernet 21, 51, 65
116
excitation current 30
EXIT 18
EXP 18, 23
exponential number 18
Extended range test 15
External Reference Resistor 62
external resistor 20, 30
F
FAT32 17
FIELD SETTINGS (F2) 48
FILE NAME 53
Filter Enable 93
FILTER ENABLE 41
Filtering 39
firmware 54, 95
Firmware Version 50
Fluke Corporation ii
French 15, 19, 47, 82
Front Panel 17, 19
front-panel key lock 98
Front Panel Keys 18
Function Keys 18
Fuse Rating 9
Fuses 15
Future Peripheral 21
G
G 59
GATEWAY 51
Gateway Address 67, 96
German 15, 19, 47, 82
Getting Started 57
GPIB 95
Graph 49
GRAPH SETTINGS (F4) 49
Guard 59
GUM 5
H
HARDWARE MAC 51
Hardware Mac Address 66
Height 9
Host Name 67, 97
HOST NAME 52
HTML 51, 65
I
ID 34
IEC 625 21
IEC-751 35
IEEE-488 21, 52, 65, 69, 95
IEEE-488 (F4) 52
IFC 52
Inspection 15
Instruction Manuals 15


Interface Commands 70
INTERNAL 53
Internal Memory 41, 42
Internal Resistor Calibration 108
IP address 51, 66
IP Address 96
IP ADDRESS 51
ISO Guide to the Expression of Uncertainty in Measurement 5
ITS-90 9, 27, 35, 83, 86
ITS-90 SUBRANGE ALERT 47, 57
J
Japanese 15, 19, 47, 82
K
K 50, 56, 108
Key Beep 95
KEYPAD BEEP 47, 58
L
LAN 21, 65
Language 19
LANGUAGE 47, 57
Language setting 82
leakage 40
limited 79
LIMITED 49
Limited mode 49
linearity 6, 104
LINEARITY C1 106
LINEARITY C2 106
LINEARITY C3 106
LINEARITY C4 106
LINEFEED 51, 52, 69
Line Power 16
line voltage 15, 22
Linux 17
Local Area Network 65
Location Descriptor 23
M
MAC address 51
Main Menu 28
Maintenance 111
Making Measurements 61
MANAGE PROBES (F5) 37
MANAGE RESISTORS (F3 32
Manufacturer 50
maximum 78
MAXIMUM 48
Maximum Current 30, 86, 89
MAXIMUM CURRENT 31, 35
Maximum operating altitude 9
MAXIMUM TEMPERATURE 35
mean 77
MEAN 45, 48
MEAN 1 45
MEAN 2 45
MEAN 3 45
MEASUREMENT 107
Measurement Current Accuracy 7
Measurement Inputs 17
measurement noise 8, 12, 40
Measurement Progress Bar 27
Measurement range 9
Measurement Screen 25
Measure Menu 38
MEASURE MENU 28
MEASURE PROTECTION 55
MEASURE TIME 44, 63
Measuring an SPRT 10
Measuring a PRT 13
Measuring a Temperature Probe 61
Measuring a Thermistor 14
Measuring Resistance Ratio 62
MEMORY DEVICE 42, 53
MENU 18
Menu Navigation 24
Menus 23
Menu System 24
minimum 78
MINIMUM 48
Model 50
MOVE DOWN (F4) 33, 38
MOVE UP (F3) 33, 38
moving window 79
Multiplexer 20
N
n 79
N 48
Network 51
NETWORK (F3) 51
Network port 51
nominal current 30, 43, 86
NOMINAL CURRENT 35
non-volatile 41
numeric keys 18
O
Operating relative humidity 9
operating temperature 9
oven 89
OVEN 27
P
P1 59
P2 59
password 24, 99
PASSWORD 54
PASSWORD (F4) 54
PEM 15, 22
117
1594A/1595A Super-Thermometer

PHASE 45
POLARITY 104
POLYNOMIAL 35, 36
PORT ENABLE 51, 52, 69
port number 65
Power Entry Module 15
Power Standby key 18
PRESET FAST 92
PRESET FAST (F3) 41
PRESET LONG 92
PRESET LONG (F4) 41
PRESET NORMAL 92
PRESET NORMAL (F1) 40
PRESET PRECISION 92
PRESET PRECISION (F2) 41
PROBE 45
probe definition 29, 61, 85, 86
Probe Definitions 54
PROBE ID 26
Probe Library 29, 34, 37, 54, 61, 85, 86
Probe Library Capacity 38
Probe Menu 34
PROBE MENU 28
PROBE MENU (F2) 34
PROBE PROTECTION 54
PRT 34
PT-100 35, 86
Q
Queue overflow 52
R
R0 35, 86
Rack Mounting 16
Rack Mount Kit 15
ratio 9, 39, 55, 104
RATIO 30, 48
Ratio Accuracy 6, 10
RATIO CALIBRATION (F3) 55, 104
Ratio Self-Calibration 55, 100, 101, 104, 108
READ FILE (F1) 32, 37
READ FILE (F3) 43
READ PROBE (F4) 37
READ RESISTOR (F3) 32
READY 27
Rear Panel 17, 20
rear USB 68
RECALL CONFIG (F2) 53
recording 81
Recording 27
Recording Menu 41
RECORDING MENU (F4) 41
RECORDING SETTINGS (F1) 42
Record Statistics 80
RECORD STATISTICS 42
REFERENCE CHANNEL 39
118
reference resistor 30, 62
Reference Resistor Drift 12
REFERENCE RESISTOR (Rs) 30
RELATIVE ERROR 107
Relative Measurement Current Accuracy 8
Remote Interface 51
REMOTE INTERFACE (F2) 51
Remote Operation Connections 21
Repeat Count 91
REPEAT COUNT 39
REPEAT NOMINAL 44, 63
Report Operation Commands 70
RESET STATISTICS (F3) 28
Resistance 89
RESISTANCE 30, 48
Resistance Accuracy 7, 11, 13
resistance calibration 106
RESISTANCE CALIBRATION (F4) 55, 106
Resistance Ratio Temperature 30
RESISTANCE VALUE 31
RESISTOR 34, 107
resistor definition 31
resistor definition library 31
Resistor Definitions 55
RESISTOR ID 31
Resistor Library 55
RESISTOR PROTECTION 55
Resistor Stability 6
RESTORE DEFAULT (F4) 54
Rs 9, 27, 30
RS 26
Rs1 20, 62, 90
Rs2 20, 62, 90
RS-232 21, 65, 69
Rs DUE ALERT 47, 57
Rs inputs 17
R(T) 87
RT90 9
R(T) POLYNOMIAL 36
RTPW 9, 86
Russian 15, 19, 47, 82
Rx 9
S
Safety Information 1
Sample Count 49
SAMPLE COUNT 49
Sample Period 39, 40, 92
SAMPLE PERIOD 40
sample size 79
Sampling 39
SAVE (F2) 36
Scan Enable 90
SCAN ENABLE 39
scan list 91
Scanner 20


Scanner Connection 20
scanning 90
Scanning 62
SCAN SETTINGS (F1) 39
Screens 23
Screen Saver 47
SCREEN SAVER DELAY 47, 57
SCREEN SAVER ENABLE 47, 57
SDC 52
self-heating 30, 43, 63
SELF-HEATING 45
sensing current 30, 40, 84, 103
SENSING CURRENT 30, 45
SENSING CURRENT 1 45
SENSING CURRENT 2 45
SENSING CURRENT 3 45
Sensing Current Test 100
SE OF MEAN 48
SERIAL (F1) 51
Serial Number 50
serial port 21, 69
SETTLE TIME 44, 63
SETTLING 27
SETUP key 18, 29
SET UP Rs (F1 31
SHOW TABLE/GRAPH (F2) 28
sign key 18, 23
SI Unit Lock 50
SI UNIT LOCK 56, 108
sliding window 49
spade connectors 58
Spanish 15, 19, 47, 82
Specifications 5
spread 79
SPREAD 48
standard deviation 48, 78
STANDARD ERROR 45, 107
standard error of the mean 48, 79
STANDARD RESISTANCE 107
standby 18
Standby Current 30, 84
STANDBY CURRENT 30
Standby Current Check 109
START (F1) 44
START/STOP MEASUREMENT (F1) 28
START/STOP RECORD (F5) 28
Start-up Help 82
START-UP HELP 47, 58
static IP address 66
Statistics 48, 49
Statistics Fields 27
STATISTICS MODE 49
STATISTICS SETTINGS (F3) 49
Status and Alert Section 27
STD DEV 45, 48
STD DEV 1 45
STD DEV 2 45
STD DEV 3 45
STEP 45
stop timer 40, 84
STOP TIMER ENABLE 40
Storage relative humidity 9
storage space 53
Storage temperature 9
STORE CONFIG (F1) 53
Subnet Mask 67, 97
SUBNET MASK 52
Subrange 1 35
Subrange 2 35
Subrange 3 35
Subrange 4 35
Subrange 5 35
Subrange 6 35
Subrange 7 35
Subrange 8 35
Subrange 9 35
Subrange 10 35
Subrange 11 35
Symbols Used 1
system clock 50
System Menu 50
SYSTEM MENU 29
SYSTEM MENU (F5) 50
system self-test 102
SYSTEM TEST (F1) 55, 103
SYST:ERR? 52
T
TCP/IP 51, 65
TCP port number 5025 65
TEMPERATURE 30
Temperature Resolution 82
TEMPERATURE RESOLUTION 47, 57
temperature unit 56, 102
TEMPERATURE UNIT (F5) 50
Terminal Screen 68
TERMINATION 52, 69
TEST CALCULATION (F1) 36
text field 23
thermal response 40
THERMISTOR 34, 36
Time 50, 99
TIME 45, 48, 50, 58, 107
TIME DATE (F1) 50
TIME/DATE PROTECTION 55
Timer Beep 83
TIMER DURATION 40
TIME REMAINING 45
TIME SPAN 49
Timing 39
TIMING SETTINGS (F2) 39
T(R) 87
119
1594A/1595A Super-Thermometer

TRACE 50
T(R) POLYNOMIAL 36
TYPE 34
U
Unit 56
UNIT 50
unlimited 79
UNLIMITED 49
Unlimited mode 49
Unpacking 15
UPDATE FIRMWARE (F5) 54
USB 17, 21, 32, 41, 42, 53, 65, 81, 97
rear 68
USB (F2) 51
USB FILE 42
User Settings 19
USER SETTINGS (F1) 47
User Settings Screen 57
User’s Guide 15
V
VARIABLE RESISTANCE 31
VERTICAL CENTER 49
VERTICAL SPAN 49
VIEW DATA (F2) 42
VIEW PREVIOUS (F2) 46
W
warm-up period 9, 18
Warnings 1
Warranty ii
Web Interface 21, 68
web page 52
Weight 9
Width 9
WRITE FILE (F2) 32, 37
WRITE FILE (F4) 43
WT90 9
Z
Zero-Power 8, 13, 30, 43, 63
ZERO-POWER MEASUREMENT (F5) 43
ZERO-POWER RESULT 45
120