Agilent Technologies 66001A User`s guide

USER’S GUIDE
Agilent Technologies
Series 661xxA
MPS POWER MODULES
& Model 66001A MPS KEYBOARD
Agilent Part No. 5959-3386
Microfiche Part No. 5959-3387
Printed in Malaysia
Update April 2000
CERTIFICATION
Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. Agilent
Technologies further certifies that its calibration measurements are traceable to the United States National Bureau of
Standards, to the extent allowed by the Bureau’s calibration facility, and to the calibration facilities of other International
Standards Organization members.
WARRANTY
This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period of three
years from date of delivery. Agilent Technologies software and firmware products, which are designated by Agilent
Technologies for use with a hardware product and when properly installed on that hardware product, are warranted not to
fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date
of delivery. During the warranty period Agilent Technologies, Inc will, at its option, either repair or replace products which
prove to be defective. Agilent Technologies does not warrant that the operation of the software, firmware, or hardware shall
be uninterrupted or error free.
For warranty service, with the exception of warranty options, this product must be returned to a service facility designated
by Agilent Technologies. Customer shall prepay shipping charges by (and shall pay all duty and taxes) for products returned
to Agilent Technologies for warranty service. Except for products returned to Customer from another country, Agilent
Technologies shall pay for return of products to Customer.
Warranty services outside the country of initial purchase are included in Agilent Technologies product price, only if
Customer pays Agilent Technologies international prices (defined as destination local currency price, or U.S. or Geneva
Export price).
If Agilent Technologies is unable, within a reasonable time to repair or replace any product to condition as warranted, the
Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent Technologies.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer,
Customer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental
specifications for the product, or improper site preparation and maintenance. NO OTHER WARRANTY IS EXPRESSED
OR IMPLIED. AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER’S SOLE AND EXCLUSIVE REMEDIES. AGILENT
TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
The above statements apply only to the standard product warranty. Warranty options, extended support contracts, product
maintenance agreements and customer assistance agreements are also available. Contact your nearest Agilent
Technologies Sales and Service office for further information on Agilent Technologies’ full line of Support Programs.
2
SAFETY SUMMARY
The following general safety precautions must be observed during all phases of operation of this power module. Failure to
comply with these precautions or with specific warnings elsewhere in this guide violates safety standards of design,
manufacture, and intended use of the power module. Agilent Technologies assumes no liability for the customer's failure to
comply with these requirements.
GENERAL
When installed in a properly wired mainframe, this product is a Safety Class 1 instrument (provided with a protective earth terminal).
Any LEDs used in this product are Class 1 LEDs as per IEC 825-l.
This ISM device complies with Canadian ICES-001. Cet appareil ISM est conforme à la norme NMB-001 du Canada.
ENVIRONMENTAL CONDITIONS
With the exceptions noted, all instruments are intended for indoor use in an installation category II, pollution degree 2 environment.
They are designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the specifications
tables for the ac mains voltage requirements and ambient operating temperature range.
BEFORE APPLYING POWER.
Verify that the power module line voltage switch is set to match the available line voltage.
GROUND THE INSTRUMENT.
To minimize shock hazard, the mainframe must be connected to an electrical ground. The mainframe must be connected to the ac power
supply mains through a three-conductor power cable, with the third wire firmly connected to an electrical ground (safety ground) at the
power outlet. Any interruption of the protective (grounding) conductor or disconnection of the protective earth terminal will cause a
potential shock hazard that could result in personal injury. If
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE.
Do not operate the instrument in the presence of flammable gases or fumes.
KEEP AWAY FROM LIVE CIRCUITS.
Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be made by qualified
service personnel. Do not replace components with power cable connected. Under certain conditions, dangerous voltages may exist even
with the power cable removed. To avoid injuries, always disconnect power, discharge circuits and remove external voltage sources before
touching components.
DO NOT SERVICE OR ADJUST ALONE.
Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.
DO NOT EXCEED INPUT RATINGS.
This mainframe is equipped with a power line filter to reduce electromagnetic interference and must be connected to a properly grounded
receptacle to minimize electric shock hazard. Operation at line voltages or frequencies in excess of those stated on the line rating label
may cause leakage currents in excess of 5.0 mA peak.
SAFETY SYMBOLS.
The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not correctly
performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING sign until the
indicated conditions are fully understood and met.
The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if not correctly
performed or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed
beyond a CAUTION sign until the indicated conditions are fully understood and met.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT.
Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the
instrument. Return the instrument to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety
features are maintained.
Instruments that appear damaged or defective should be made inoperative and secured against unintended operation until they can be
repaired by qualified service personnel.
3
SAFETY SYMBOL DEFINITIONS
Symbol
Description
Symbol
Description
Direct current
Terminal for Line conductor on permanently
installed equipment
Alternating current
Caution, risk of electric shock
Both direct and alternating current
Caution, hot surface
Three-phase alternating current
Caution (refer to accompanying documents)
Earth (ground) terminal
In position of a bi-stable push control
Protective earth (ground) terminal
Out position of a bi-stable push control
Frame or chassis terminal
On (supply)
Terminal for Neutral conductor on
permanently installed equipment
Off (supply)
Terminal is at earth potential
(Used for measurement and control
circuits designed to be operated with
one terminal at earth potential.)
Standby (supply) - Units with this symbol are not
completely disconnected from ac mains when this
switch is off. To completely disconnect the unit from
ac mains, either disconnect the power cord or have a
qualified electrician install an external switch.
Herstellerbescheinigung
Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenläminformationsverordnung vom 18
Januar 1991. * Schalldruckpegel Lp <70 dB(A) * Am Arbeitsplatz * Normaler Betrieb * Nach EN 27779 (Typprufung).
Manufacturer's Declaration
This statement is provided to comply with the requirements of the German Sound Emission Directive, from 18 January
1991. * Sound Pressure Lp <70 dB(A) *At Operator Position * Normal Operation * According to EN 27779 (Type Test).
Printing History
The current edition of this guide is indicated below. Reprints of this guide containing minor corrections and updates may
have the same printing date. New editions are identified by a new printing date and, in some cases, by a new part number.
A new edition incorporates all new or corrected material since the previous edition. Changes to the guide occurring
between editions are covered by change sheets shipped with the guide.
Edition 1 ......Feb, Apr, Oct, 1992
.....................July 1993
.....................June 1997
.....................April 2000
© Copyright 1992 Agilent Technologies, Inc.
This document contains proprietary information protected by copyright. All rights are reserved. No part of this document
may be photocopied, reproduced, or translated into another language without the prior consent of Agilent Technologies.
The information contained in this document is subject to change without notice.
4
DECLARATION OF CONFORMITY
According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014
Manufacturer’s Name and Address
Responsible Party
Agilent Technologies, Inc.
550 Clark Drive, Suite 101
Budd Lake, New Jersey 07828
USA
Alternate Manufacturing Site
Agilent Technologies (Malaysia) Sdn. Bhd
Malaysia Manufacturing
Bayan Lepas Free Industrial Zone, PH III
11900 Penang,
Malaysia
Declares under sole responsibility that the product as originally delivered
Product Names
a) Modular Power System Mainframe
b) Keyboard
c) dc Power Modules
Model Numbers
a) 66000A
b) 66001A
c) 66101A; 66102A; 6103A; 66104A; 66105A; 66106A
Product Options
This declaration covers all options and customized products based on the above
products.
Complies with the essential requirements of the Low Voltage Directive 73/23/EEC and the EMC
Directive 89/336/EEC (including 93/68/EEC) and carries the CE Marking accordingly.
EMC Information
As detailed in
Assessed by:
Safety Information
ISM Group 1 Class A Emissions
Electromagnetic Compatibility (EMC), Certificate of Conformance Number
CC/TCF/00/077 based on Technical Construction File (TCF) HPNJ4, dated
Oct. 30, 1997
Celestica Ltd, Appointed Competent Body
Westfields House, West Avenue
Kidsgrove, Stoke-on-Trent
Straffordshire, ST7 1TL
United Kingdom
and Conforms to the following safety standards.
IEC 61010-1:2001 / EN 61010-1:2001
UL 1244
CSA C22.2 No. 1010.1:1992
This DoC applies to above-listed products placed on the EU market after:
January 1, 2004
Date
Bill Darcy/ Regulations Manager
For further information, please contact your local Agilent Technologies sales office, agent or distributor, or
Agilent Technologies Deutschland GmbH, Herrenberger Straβe 130, D71034 Böblingen, Germany
5
Table of Contents
1.
General Information
Introduction ..................................................................................................................................................9
Safety Considerations...................................................................................................................................9
Instrument Identification ..............................................................................................................................9
Options .........................................................................................................................................................9
Accessories.................................................................................................................................................10
Description .................................................................................................................................................10
Programming ...........................................................................................................................................10
Output Characteristic...............................................................................................................................10
Specifications and Supplemental Characteristics .......................................................................................11
2.
Installation
Inspection ...................................................................................................................................................17
Damage....................................................................................................................................................17
Items Supplied.........................................................................................................................................17
Switches .....................................................................................................................................................17
Line Voltage Switches.............................................................................................................................17
Configuration Switch...............................................................................................................................17
Remote Inhibit (RI) Function Switches ................................................................................................19
Display Function Switch.......................................................................................................................19
Calibration Function Switch .................................................................................................................19
Power On Function Switch...................................................................................................................19
Installing the Module in the Mainframe .....................................................................................................20
Connecting the Load...................................................................................................................................20
Output Connector ....................................................................................................................................20
Output Connections ..............................................................................................................................21
Selecting the Proper Wire Size .............................................................................................................21
Output Isolation ....................................................................................................................................21
Local Voltage Sensing.............................................................................................................................21
Remote Voltage Sensing .........................................................................................................................22
Voltage Readback ................................................................................................................................22
Output Rating .......................................................................................................................................23
Output Noise ........................................................................................................................................23
Parallel Operation....................................................................................................................................23
Series Operation ......................................................................................................................................24
Multiple Loads ........................................................................................................................................25
Optional Relay Connector .......................................................................................................................25
Capacitive Loads .....................................................................................................................................26
Inductive Loads .......................................................................................................................................26
OVP Considerations ................................................................................................................................26
Battery Charging .....................................................................................................................................26
Connecting the Controller ..........................................................................................................................26
3.
Turn-On Checkout
Introduction ................................................................................................................................................27
Module Panel Display ................................................................................................................................27
Module Turn-On State................................................................................................................................28
Checking Basic Module Functions.............................................................................................................28
In Case of Trouble......................................................................................................................................29
Mainframe Failure ...................................................................................................................................29
Module Line Fuse....................................................................................................................................29
7
Table of Contents (continued)
Module Output Connector .......................................................................................................................29
Error Messages ...................................................................................................................................29-30
4.
Basic Power Module Commands
Introduction ................................................................................................................................................31
GPIB Controller ......................................................................................................................................31
MPS Keyboard ........................................................................................................................................31
Synopsis of Commands ..............................................................................................................................31
Controlling the Output State....................................................................................................................32
Controlling Protection Functions.............................................................................................................32
Controlling Fixed-Mode Output ..............................................................................................................32
Controlling List-Mode Output.................................................................................................................33
Controlling Triggers ................................................................................................................................33
Using RI/DFI Functions ..........................................................................................................................34
Changing the Power-On State ....................................................................................................................34
A.
Calibration
Introduction ................................................................................................................................................35
Enabling or Disabling the Calibration Function .........................................................................................35
Hardware Control ....................................................................................................................................35
Software Control .....................................................................................................................................35
Changing the Calibration Password............................................................................................................35
Performing a Calibration ............................................................................................................................35
Equipment Required................................................................................................................................36
Calibrating Voltage .................................................................................................................................36
Calibrating Current..................................................................................................................................37
Using the CAL:AUTO Command ...........................................................................................................38
Recovering the Factory Calibration Constants ...........................................................................................38
Recovering from a Lost Calibration Password ...........................................................................................38
Calibration Error Messages ........................................................................................................................38
Agilent BASIC Calibration Program............................................................................................................38
B.
Using the Agilent 66001A MPS Keyboard
Introduction ................................................................................................................................................41
Connecting the Keyboard ...........................................................................................................................41
Keyboard Description.................................................................................................................................42
Using the Display .......................................................................................................................................45
Changing or Entering Values...................................................................................................................45
Displaying Status.....................................................................................................................................45
Sending SCPI Commands ..........................................................................................................................46
Command Example .................................................................................................................................46
Query Example........................................................................................................................................47
Error Example .........................................................................................................................................48
SCPI Command Tree..................................................................................................................................50
Index ...............................................................................................................................................51
Agilent Sales and Support Offices ..............................................................................................54
8
1
General Information
Introduction
This guide describes how to install, check out, operate, and calibrate the Agilent Series 661xxA power modules used in the
Agilent 66000 Modular Power System. Programming the power module from the optional Agilent 66001A Keyboard is
described in Appendix B of this guide. Programming the power module over the GPIB bus is covered in the module
Programming Guide (see "Related Documents", below). Setting the GPIB address is described in the mainframe
Installation Guide. For complete verification procedures, see the module Service Guide (listed under "Related Documents",
below). The Agilent 66000A Modular Power System Product Note has specific application programs in several DOScompatible languages and GPIB interface drivers.
Related Documents
Document
Programming Guide for Agilent Series 66lxxA MPS Power Modules
Installation Guide for DC Module Connectors
Service Guide for Agilent Series 66lxxA Power Modules
Installation Guide for Agilent 66000A Modular Power System Mainframe
Service Guide for Agilent 66000A Modular Power System Mainframe
Quick Reference Card for Optional Agilent 66001A MPS Keyboard*
Agilent 66000A Modular Power System Product Note
* A Quick Reference Card is shipped with each Agilent 66000 mainframe.
Agilent Part No.
5959-3362
5959-3366
5959-3364
66000-90001
66000-90003
66001-90001
5988-2800EN
Safety Considerations
When properly installed in the mainframe, the power module is part of a subsystem that constitutes a Safety Class 1
instrument. The power module has a protective earth connection that is completed through a contact spring in the
mainframe backplane. When the power module is moved in and out of the mainframe, the earth ground connection is made
before ac power is connected and is removed after ac power is disconnected.
Instrument Identification
Agilent Technologies instruments are identified by a 10-digit serial number. The format is described as follows: first two
letters indicate the country of manufacture. The next four digits are a code that identify either the date of manufacture or of a
significant design change. The last four digits are a sequential number assigned to each instrument.
Item
US
3648
0101
Description
The first two letters indicates the country of manufacture, where US = USA; MY = Malaysia; SG = Singapore.
This is a code that identifies either the date of manufacture or the date of a significant design change.
The last four digits are a unique number assigned to each power supply.
Options
Option
760
0L2
0B3
Description
Output Connector with Isolation/Polarity Reversal Relays
Extra set of Documentation
Series 661xxA Service Guide
General Information
9
Accessories
Agilent No.
34551A
Description
Rack mount for Agilent 66001A MPS keyboard
Description
The Agilent 66lxxA Series Power Modules are used in the Agilent 66000 Modular Power System (MPS) mainframe to
provide a range of dc output voltages and currents. The modules are installed or removed from the front of the mainframe
without the need for disconnecting any wires. Modules may be connected in series or parallel to provide increased output
voltages or currents. The modules can be equipped with optional isolation and polarity reversal relays that are built into the
module output connector.
The power module front panel has digital readouts of output voltage and current. It also has annunciators that indicate:
•
•
•
•
constant voltage, constant current, or unregulated operation
activation of a protection circuit
disabling of the output
remote operation (addressed by the controller)
Programming
The power module is programmed over the GPIB from a controller using SCPI (Standard Commands for Programmable
Instruments). This makes power module programs compatible with those of all other instruments controlled with this
language. Among the functions that can be programmed are output voltage and current, OVP (overvoltage protection),
OCP (overcurrent protection), status registers, output relays, and output voltage and current calibration.
In addition, the power module has programmable trigger, list, and RI/DFI (remote inhibit/discrete fault indicator)
subsystems. Triggers can occur from signals at the mainframe TRIG IN jack or from selected internal events. The list
subsystem generates preprogrammed sequential outputs in response to triggers. The RI/DFI subsystem generates an output
on the mainframe FLT line in response to selected internal events or turns off the output in response to an input on the
mainframe INH line.
The power module also can be programmed locally from the optional Agilent 66001A MPS Keyboard. The keyboard has
an alphabetical command menu for all power module SCPI commands. By scrolling through the menu and entering the
appropriate parameters, commands may be created for development or debugging.
Output Characteristic
The power module can operate in either CV (constant voltage) or CC (constant current) mode over its voltage and current
output range (see Table 1-1). The operating locus (see Output Characteristic Curve in Table 1-2) shows a single-range,
limited two-quadrant capability. The operating point is determined by the voltage setting (VS), the current setting (IS) and
the load impedance (Rl). Two operating points are shown. Point 1 is defined by the load line cutting the operating locus in
the CV region, which defines the CV mode (curve A). In this mode, the power module will maintain the voltage at VS for
varying load currents (determined by V÷Rl) up to IS. If the load demands a current greater than IS, the power module
switches to CC mode. CC mode (curve B) is defined by the load line cutting the operating locus in the CC region (see Point
2). Under this condition, the power module maintains the current at IS at some voltage determined by IS x Rl.
10
General Information
When the power module is operated beyond either rated output, the performance specifications are not guaranteed, although
typical performance may be good. Operation in quadrant 2 is limited to about 10% of the maximum rated positive output
current. This allows the power module to sink current for more rapid downprogramming in the CV mode.
Specifications and Supplemental Characteristics
Table 1-1 lists the specifications of the power modules. Specifications are warranted over the specified temperature range.
Table 1-2 lists the supplemental characteristics, which are not warranted but are descriptions of performance determined
either by design or type testing.
Table 1-1. Performance Specifications
Agilent Model
Parameter
66101A
66102A
66103A
66104A
66105A
66106A
Specifications are warranted over the temperature range 0 to 55° C with a resistive load and the output connected for local
sensing. Derate the output current 1% per °C from 40° C to 55°C.
Output Ratings
Voltage:
Current:
Power:
Programming Accuracy @
calibration temperature ± 5 °C)*
0-8V
0 - 16 A
128 W
0 - 20 V
0 - 7.5 A
150 W
0 - 35 V
0 - 4.5 A
157.5 W
0 - 60 V
0 - 2.5 A
150 W
0 - 120 V
0 - 1.25 A
150 W
0 - 200 V
0 - 0.75 A
150 W
Voltage:
0.03% +
Current:
0.03% +
*Factory calibration temperature =
25 °C
Ripple & Noise (from 20 Hz to 20
MHz with outputs ungrounded, or with
either output terminal grounded)
3 mV
6 mA
8 mV
3 mA
13 mV
2 mA
27 mV
1.2 mA
54 mV
0.6 mA
90 mV
0.4 mA
Constant Voltage:
rms
Constant Voltage:
p-p
Constant Current:
rms
Readback Accuracy
With respect to actual output @
calibration temperature following self
calibration.*
Voltage:
0.02% +
Current:
0.02% +
*Factory calibration temperature =
25 °C
Load Regulation (change in output
voltage or current for any load change
within ratings)
2 mV
5 mV
8 mA
3 mV
7 mV
4 mA
5 mV
10 mV
2 mA
9 mV
15 mV
1 mA
18 mV
25 mV
1 mA
30 mV
50 mV
1 mA
2 mV
6 mA
5 mV
3 mA
8 mV
2 mA
16 mV
1 mA
32 mV
0.6 mA
54 mV
0.3 mA
Voltage:
Current:
1 mV
0.5 mA
1 mV
0.2 mA
1 mV
0.2 mA
2 mV
0.1 mA
4 mV
50 µA
7 mV
30 µA
General Information
11
Table 1-1. Performance Specifications (continued)
Agilent Model
Parameter
66101A
66102A
66103A
66104A
Line Regulation (change in output
voltage or current for any line change
within ratings)
Voltage:
0.5 mV
0.5 mV
1 mV
2 mV
Current:
0.75 mA
0.5. mA
0.3 mA
0.1 mA
Transient Response Time (for output
< 1 ms
voltage to recover to within 100 mV of
its previous level following a step
change in load current that is up to 10%
of the power module rated output
current.
AC Input Ratings (selectable via
module switch- see Chapter 2)
Nominal line voltage (Vac)
115 V switch setting
87- 132 Vac
230 V switch setting
174- 250 Vac
Frequency range:
47 - 63 Hz
±240 Vdc
Output Terminal Isolation (maximum,
from output to the mainframe chassis
ground):
Table 1-2. Supplemental Characteristics
Agilent Model
66101A
66102A
66103A
66104A
Parameter
Output Programming Range
(Maximum programmable values):
Voltage:
Current:
OV Protection:
Average Programming Resolution
Voltage:
Current:
OV Protection:
OVP Accuracy (@ calibration
temperature ±5° C):*
* Factory calibration temp = 25° C
Readback Resolution
Voltage:
Current:
Drift (Temperature Stability)
(following a 30-minute warmup, change
in output over 8 hours under constant
line, load, and ambient temperature)
Voltage:
Current:
12
0.02% +
0.02% +
General Information
66105A
66106A
3 mV
50 µA
5 mV
30 µA
66105A
66106A
8.190 V
16.380 A
9.6 V
20.475 V
7.678 A
24.0 V
35.831 V
4.607 A
42.0 V
61.425 V
2.559 A
72.0 V
122.85 V
1.280 A
144.0 V
204.75 V
0.768 A
240.0 V
2.4 mV
4.6 mA
50 mV
250 mV
5.9 mV
2.3 mA
120 mV
500 mV
10.4 mV
1.4 mA
200 mV
800 mV
18.0 mV
0.75 mA
375 mV
1V
36.0 mV
0.39 mA
750 mV
1.5 V
60.0 mV
0.23 mA
1.25 V
2.5 V
0.305 mV
0.587 mA
0.763 mV
0.293 mA
1.335 mV
0.169 mA
2.289 mV
0.099 mA
4.577 mV
0.049 mA
7.629 mV
0.030 mA
0.4 mV
8 mA
1 mV
5 mA
2 mV
2.5 mA
3 mV
1.3 mA
6 mV
0.63 mA
10 mV
0.38 mA
Table 1-2. Supplemental Characteristics (continued)
Agilent Model
Parameter
66101A
66102A
66103A
66104A
Temperature Coefficients (change in
output per °C after a 30-minute
warmup)
Output Voltage:
30 ppm +
Output Current:
30 ppm +
Voltage Readback:
20 ppm +
20 ppm +
± Current Readback:
OV Protection:
Maximum Reverse Current
(maximum current, without damage,
that the power module will withstand
while turned on and with the dc output
reverse biased by an external dc
source):
0.1 mV
0.2 mA
0.1 mV
0.2 mA
1 mV
16 A
0.2 mV
0.1 mA
0.2 mV
0.1 mA
2 mV
7.5 A
Typical Output Common Mode Noise
Current*
rms:
peak-peak:
0.3 mV
0.05 mA
0.2 mV
0.05 mA
4 mV
4.5 A
0.6 mV
0.03 mA
0.7 mV
0.02 mA
8 mV
2.5 A
66105A
66106A
1.1 mV
0.01 mA
0.7 mV
0.02 mA
16 mV
1.25 A
1.8 mV
0.006 mA
1.1 mV
0.02 mA
30 mV
0.75 A
0.5 mA
5 mA
* Referenced to mainframe chassis ground.
Remote Sensing Capability
Voltage drop per lead:
Load voltage:
Load Regulation:
Up to 1/2 of rated output voltage
Subtract voltage drop in load leads from specified output voltage rating
For each 1-volt change in the negative output lead due to load current change,
add 2 mV to the voltage load regulation specification (see Table 1-1).
20 ms
Command Processing Time (average
time for output to begin to change after
receipt of digital data when the power
module is connected directly to the
GPIB):
Output Voltage Programming
Response Time*
Time for output to change from 10% to
90% of its total excursion:
Time for output to change from 90% to
10% of its total excursion:
Time for output voltage to settle to
within 0.1% of the final value:
< 20 ms
< 20 ms
< 50 ms
120 ms
* Excluding command processing time
General Information
13
Table 1-2. Supplemental Characteristics (continued)
Agilent Model
Parameter
66101A
66102A
66103A
66104A
66105A
66106A
Trigger Response Time (average time
for the output voltage or current to
begin to change upon receipt of an
external trigger)
With GPIB activity:
5 ms
Without GPIB activity:
3 ms
Trigger Maximum Frequency (for
repetitive external triggering, the
maximum frequency for which the
Trigger Response Time is valid)
With GPIB activity:
75 Hz
Without GPIB activity:
85 Hz
Dwell Time
Programmable range:
10 ms to 65 s
Resolution:
2 ms
Accuracy
With GPIB activity:
± 5 ms
Without GPIB activity:
± 2.5 ms
Active downprogrammer sinks approximately 10% of rated output current
Downprogramming:
Output is monotonic over entire rated voltage, current, and temperature range
Monotonicity:
GPIB Interface Capabilities
Interface Signals (see IEEE 488.1):
Programming Language:
Serial Link Capabilities (maximum
power modules sharing one GPIB
primary address)
Savable States
Nonvolatile memory locations:
Volatile memory locations:
Nonvolatile memory write cycles:
Recommended Calibration Interval:
Safety Compliance
Complies with:
Designed to comply with:
RFI Suppression (designed to comply
with):
Dimensions
Width:
Height:
Depth
Pull tab inserted:
Pull tab extended:
Weight
Net:
Shipping:
14
General Information
AH1,C0,DC1, DT1,EI,LE4,PP0, RL1,SH1,SR1,TE6
SCPI (Standard Commands for Programmable Instruments)
16
10
5 (0 through 4)
5 (5 through 9)
40,000 (typical)
1 year
CSA 22.2 No.231 & IEC 348
UL 1244 & VDE 0411
FTZ 1046/84, Level B
48.3 mm (1.9 in)
141.2 mm (5.6 in)
571.4 mm (22.5 in)
606.4 mm (23.8 in)
2.7 kg (6 lb)
4.1 kg (9 lb)
Table 1-2. Supplemental Characteristics (continued)
Parameter
Agilent Model Number and Parameter Value
Output Characteristic Curve:
Table 1-3. Replaceable Parts List
Description
Agilent Part No.
Cable assembly, mainframe GPIB
0.5 meters (1.6 ft)
10833D
1 meter (3.3 ft)
10833A
2 meters (6.6 ft)
10833B
4 meters (13.2 ft)
10833C
Cable assembly, mainframe serial link
5080-2148
Fuse, ac-line, 6 A
2110-0056
Output connector, standard
5060-3386
Output connector, with relays
5060-3387
Output connector converter board (converts
5060-3351
5060-3386 to 5060-3387)
Plug, mainframe INH/RFI input
1252-1488
Resistor, calibration
(see Appendix A)
General Information
15
2
Installation
Inspection
Damage
When you receive your power module, inspect it for any obvious damage that may have occurred during shipment. If there
is damage, notify the shipping carrier and the nearest Agilent Sales and Support Office immediately. Warranty information
is printed in the front of this guide.
Items Supplied
In addition to this manual, check that the following items are included with each power module (see Table 1-3 for part
numbers):
•
•
•
One output connector
One Series 66lxxA Programming Guide
One or more Manual Change Sheets may be included with each guide. If there are change sheets, make the
indicated corrections to the guides.
Switches
Before inserting the power module in the mainframe, read the following information to determine if you need to change any
of the switch settings.
Line Voltage Switches
Figure 2-1 shows the location of the line voltage switches and the ac line fuse. The line voltage switches are shipped in
the 230-volt position. If required, use a flat-bladed screwdriver or similar tool to move both switches to the proper position
for your nominal line voltage.
Line Voltage
Note
Switch Position
110, 120 Vac
115
200, 220, 230, 240 Vac
230
If you change the line switch position, remember to also correct the line voltage label on the rear of the
mainframe. The mainframe contains no line voltage switches.
Configuration Switch
Figure 2-2 shows the location of the power module configuration switch. Table 2-1 indicates the functions of the switch and
the factory-default settings. If you need to change any of the settings, refer to the applicable function.
Installation
17
Figure 2-1. Power Module Line Fuse and Switches
Figure 2-2. Power Module Configuration Switch
Table 2-1. Settings for Power Module Configuration Switch
Required Switch Setting
Desired Function
1
2
3
4
5
6
7*
RI disabled
0
0
1
RI unlatched (live)
0
1
1
RI latching †
1
1
1
Display disabled
0
1
Display enabled †
I
1
Inhibit calibration
0
0
1
Factory calibration
0
1
1
Normal calibration †
1
1
1
0
1
Power on state is *RCL 0
1
1
Power on state is *RST†
†= factory default setting "0" Off or open
"1" On or closed.
*Positions 7 and 8 are for service functions. For normal operation, they must be set to 1.
18
Installation
8*
1
1
1
1
1
1
1
1
1
1
Remote Inhibit (RI) Function Switches
This function allows the power module outputs to be shut down from a signal (low-true TTL level) applied to the mainframe
INH input. The INH input is internally connected to the mainframe remote inhibit (RI) line. This line is normally high and
is distributed to all power modules in the mainframe. An external switch closure that shorts the mainframe INH input is
detected by the power module as an RI signal.
Note
See "Chapter 3 - Connections" in the mainframe Installation Guide for more information on external INH
connections.
Within each power module, the RI signal is applied to the RI section of the configuration switch (see Figure 2-2). The RI
switch allows you to select one of the following responses to the RI input signal:
Switch Setting
RI disabled
RI Action
The module ignores the RI input signal
RI latched
The module shuts down and remains shut down when the RI signal goes true. A
software command is required to restore the output (see "Chapter 4 - Basic
Power Module Commands").
RI nonlatched (real-time)
The module shuts down only as long as the RI signal is true (TTL low). The
output is restored when the RI signal goes false (TTL high).
Display Function Switch
A single switch configures the display function. Use it to permanently turn the power module voltage and current display
indicators off or on (the annunciators are unaffected by this switch). If the switch is left in the ON position, the display may
be turned on or off by software commands (see the power module Programming Guide).
Calibration Function Switches
The calibration switches allow you to select one of the following modes of calibration:
Switch Setting
Normal calibration
Factory calibration
Inhibit calibration
Calibration Mode
Permits normal calibration (requires entry of a password)
Restores original factory calibration (no password is required)
Prevents calibration
The factory position is useful if the power module has been miscalibrated or if the calibration password has been lost.
Power-On Function Switch
This switch allows you to determine the operating state of the power module when it is turned on. With the switch set to 1
(on), the power module will be in the factory-default reset state (see *RST in "Chapter 3 - Language Dictionary" of the
power module Programming Guide). If you move the switch to 0, the power module will turn on to whatever state you save
to memory location 0. See "Chapter 4 - Basic Power Module Commands" for more information.
Installation
19
Installing The Module In The Mainframe
Figure 2-3. Power Module Installation
Note
1.
2.
3.
4.
5.
6.
A fully loaded mainframe can weigh over 36 kg (80 lbs). Install the mainframe into the rack (see the
"Mainframe Users Guide") before installing the modules into the mainframe.
Turn off the mainframe power switch.
Make certain the pull tab extends from the module (see Figure 2-3).
Slide the module into the mainframe slot. You may use any available slot.
Push the module into the backplane connector until you feel the module connector snap into the backplane connector.
Push the lock tab into the front of the module. If the module is not properly plugged into the backplane connector, the
lock tab will not retract into the module.
If desired, mark or label the power module with its slot address.
Important
Marking or labeling the power module will prevent replacing it in the wrong slot if it is subsequently
removed from the mainframe. Also, with two mainframes linked together, a slot can be either of two
numbers, depending on whether it is in the main or the auxiliary mainframe (see "Connecting the
Controller" in this chapter).
Connecting The Load
Output Connector
One output connector (see Table 1-3) is shipped with each power module. This can be either a standard or relay type. The
Installation Guide supplied with the connector shows how to open the connector, connect the wires, and secure the
connector to the mainframe.
20
Installation
Output Connections
Before making the actual connections, you must decide on the system configuration. The following factors are described in
the rest of this chapter:
■
■
■
■
■
■
using the correct wire size
maintaining isolation guidelines
selecting local or remote voltage sensing
connecting modules in series or in parallel
using output relays
connecting to capacitive or inductive loads
Selecting the Proper Wire Size
Fire Hazard. To satisfy safety requirements, load wires must be large enough not to overheat when
carrying the short-circuit output current of the device connected to the power module. See Table 2-2
for the characteristics of AWG (American Wire Gage) copper wire.
AWG No.
20
18
16
14
Table 2-2. Current Capacity and Resistance of Stranded Copper Conductors
*Ampacity
**Resistance
AWG No. *Ampacity
**Resistance
(Ω/m
Ω/ft)
(Ω/m
Ω/ft)
8.33
0.0345
0.01054
12
40
0.0054
0.00165
15.4
0.0217
0.00663
*In free air
**At 20 °C
19.4
0.0137
0.00417
31.2
0.0086
0.00262
Output Isolation
The output connector ground terminal is a low-noise ground provided for convenience, such as for
grounding wire shields. This terminal is not designed to function as an equipment safety ground.
The power module output terminals are isolated from earth ground. If required, either output terminal may be grounded.
The potential between either output terminal and ground must not exceed ±240 Vdc. Failure to
observe this restriction may damage the power module.
Local Voltage Sensing
Figure 2-4A shows the load connection for local sensing. There is a switch on the output connector that selects either local
or remote sensing of the output voltage. The connector is shipped with the switch in the LOCAL position. In order to
configure the output for local sensing, make certain this switch is set to LOCAL.
Note The position of the Local/Remote switch also can be determined by software (see
VOLT:SENS:SOUR? in "Chapter 3 - Language Dictionary" of the Programming Guide).
With local sensing, the power module voltage readback circuit senses the voltage at the output terminals. Since this does
not compensate for voltage drops in the terminal screw connections and output leads, use Local sensing only in applications
requiring low output currents or where the load regulation is not critical.
Installation
21
Remote Voltage Sensing
Figure 2-4B shows the wiring for remote sensing. There is a switch on the output connector that selects either local or
remote sensing of the output voltage. To configure the output for remote sensing, do the following:
■
■
Connect sense leads to the load
Make certain that the connector switch is set to REMOTE
Note
If you leave the connector switch in LOCAL, the power module will regulate the programmed voltage at
the connector, not at the load.
Because they do not carry load current, you may use smaller gauge wire for the remote sense leads.
Be careful to avoid open circuits in the sense leads, such as leaving the output connector sense switch in the Local position.
If this happens, the power module will regulate at its output terminals instead of at the load.
Note
If the sense terminals are left open, the voltage at the output terminals will increase approximately 3 to 5%
over the programmed value. The readback voltage will not indicate this increase because readback is
measured at the sense terminals.
Figure 2-4. Load Connection
The dashed lines in the connection drawings illustrate remote sense connections. In this case, the remote sense terminals of
the power module are connected to the load rather than the output terminals. This allows the power module to automatically
compensate for the voltage drop in the load leads as well as to accurately read back the voltage at the load. In remote-sense
applications, the voltage readback from across the load is not the output voltage of the power module. The actual output
voltage is the sum of the load voltage and the voltage drop in the load lead. Keep this output voltage within the power
module’s maximum voltage rating. Failure to do this may result in an unregulated condition, especially when the line
voltage is low.
Voltage Readback
In remote sense applications, the voltage readback occurs directly at the load. This allows the power module to
automatically compensate for the voltage drop in the load leads and to provide an accurate voltage readback directly across
the load.
22
Installation
Output Rating
The rated output voltage and current specified in Table 1-1 applies at the output terminals of the power module. With
remote sensing, the power module must increase its output to compensate for voltage dropped in the load leads. If you
attempt to provide full rated output voltage at the sense terminals (load), the power module’s output voltage may exceed its
maximum rating. This may trip the OV protection circuit, which senses the voltage at the output terminals, or cause an
unregulated output condition, particularly when the ac line voltage is low.
Output Noise
Noise picked up by the sense leads may appear at the output of the power module and can adversely affect the load
regulation. To minimize noise pickup, twist the sense leads and route them parallel and close to the load leads. It may be
necessary to use shielded sense leads in noisy environments. If you do, ground the shield only at the output connector
ground screw. Do not use the shield as one of the sense leads.
Parallel Operation
Power modules may be connected in parallel to obtain increased output current. The power modules must be individually
programmed; they do not function in the autoparallel mode that is commonly used by many Agilent power supplies.
Figure 2-5 shows two power modules connected in parallel. You must keep the same impedance to the load by using leads
of equal length and wire size from each module to the load. Select one module (usually the one with the lesser current
capacity) to operate in the "CV Mode". The other module then must operate in the "CC Mode" module. If you are using
remote sensing, connect the sense leads to the module operating in the CV mode.
Since you must program one module to operate in CV mode and the other to operate in CC mode, refer to the output
characteristic curve shown at the end of Chapter 1 to see what this means. Curve  shows a module operating in CV mode;
its output voltage remains constant over the range of its operating current. Curve ô shows a module operating in CC mode;
its output current remains constant over the range of its operating voltage.
Figure 2-5. Connecting Power Modules in Parallel
For proper parallel operation, observe the following rules:
1.
2.
3.
4.
Program both module outputs OFF.
Program the CV mode module for the desired output voltage.
Program the CV mode module’s OVP voltage to the desired value; always higher than the output voltage.
Program the output and OVP voltages of the CC module slightly higher (about 1 volt) than those of the CV module.
This is to ensure that the CC module stays in CC mode.
Installation
23
5.
6.
7.
8.
9.
In order to maintain proper regulation, the load must always draw at least as much current as is programmed for the
module that is in CC mode. You can maintain regulation over a range of current only as long as this condition remains
true.
As near as is permitted by condition 5, program the current levels of both modules for a balanced distribution of the
total output current. Do not program the CV module near its maximum output current level.
Program the outputs of both modules ON.
When the system is operating, observe that the CV annunciator of the CV module stays on and the CC annunciator on
the CC module stays on. If not, repeat steps 1 through 7.
Once the modules are properly set up, do all subsequent voltage programming from the CV module; the CC
module will track that module.
Remember that although the CV module is controlling the output voltage, the CC module is
programmed to a slightly higher voltage. Do not allow the CC module to go into CV mode. Do not
program the CV module to 0 volts without first disabling the outputs of both power modules.
Otherwise, the CV module could sink up to 10% of its rated output current from the CC module.
As an example, assume that an Agilent 66102A (20 V @ 7.5 A) and an Agilent 66103A (35 V @ 4.5 A) are connected in
parallel to supply a load of 10 amperes at 18 volts. The Agilent 66102A is selected as CC mode module and will supply
approximately 7.6 A, maximum. The Agilent 66103A will be the CV module and will supply the remaining current (2.4 A).
When the two modules are operated in parallel, you may expect the system to regulate at 18 Volts and 10 amperes as long as
the load current remains above 7.6 amperes (see rule 5, above).
The following program shows how to program the two power modules. Generic code (SCPI commands) are shown; they
may be sent either from the keyboard or from a GPIB controller.
OUTP OFF
Send to both modules
VOLT:LEV 18
VOLT:PROT 18.5
CURR:LEV 2.4
Program the CV mode module
VOLT:LEV 19
VOLT:PROT 19.5
CURR:LEV MAX
Program the CC mode module
OUTP ON
Restore the outputs of both modules
Series Operation
To prevent damage to the equipment, floating voltages must not exceed 240 Vdc. No output terminal
may be more than 240 V from chassis ground.
Figure 2-6 shows how the outputs of two power modules may be connected in series to increase the output voltage.
Connect only power modules that have the same maximum output current ratings. It is recommended that you set up
both modules to operate in CV mode with their current outputs equal to the full load current. If the external load is a
storage device, such as a battery or large capacitance, be careful how you shut down the system. For example, turning off
just one module could damage the remaining module by subjecting it to double its maximum output voltage from the storage
device.
24
Installation
Figure 2-6. Connecting Power Modules in Series
Each power module has a reverse voltage protection diode across its output. If a reverse voltage is
applied, the power module has no control over the current through this diode. To avoid damaging the
power module, never connect it to a reverse voltage that can force it to conduct current in excess of
the power module’s maximum reverse current (see Table 1-2).
Multiple Loads
When connecting multiple loads to the power module with local sensing, use a separate pair of wires for each load (see
Figure 2-7). Each pair of wires should be as short as possible and twisted or bundled to reduce lead inductance and noise
pickup. If cabling or terminal considerations require the use of distribution terminals located outside the output connector,
then remote voltage sensing is recommended. Connect the sense leads either at the distribution terminals or directly at one
of the loads if it is more critical than the others.
Figure 2-7. Connecting Multiple Loads
Optional Relay Connector
If you are using the Option 760 output connector with isolation or polarity reversal relays, the output and sense lead
terminal connections are the same as those of the standard output connector. When the output connector Remote/Local
switch is in Remote, both the output leads and the sense leads are under relay control. An existing standard connector can
be converted into a relay connector. The Installation Guide provided with the connector (see "Related Documents" in
Chapter 1) includes instructions for doing this.
Capacitive Loads
Installation
25
The power module is designed to be stable for load capacitances up to the following values:
Agilent 66101A
Agilent 66102A
Agilent 66103A
50,000 µF
20,000 µF
10,000 µF
Agilent 66104A
Agilent 66105A
Agilent 66106A
4,500 µF
2,750 µF
1,650 µF
Inductive Loads
You may safely connect the power module output to inductive loads up to 100 mH. (Higher inductances are possible with a
modified module. Consult the factory for details.)
OVP Considerations
The OVP circuit senses the voltage at the output terminals, not at the sense terminals. Therefore the voltage sensed by the
OVP circuit can be significantly higher than the voltage being regulated at the load. You must program the OVP trip
voltage high enough to compensate for the expected drop from the power module output to the load.
Battery Charging
The power module OVP trip circuit has a downprogrammer that discharges the output whenever OVP trips. If the output is
connected to a battery and the OVP is tripped (or the power module voltage is programmed below the battery voltage), the
power module will sink current from the battery. The down programmer limits the value of this current to no more than
10% of the power module’s maximum rated output current.
Connecting The Controller
The Agilent 66000A Mainframe has a GPIB port for connection to the controller. Each power module has a GPIB primary
address determined by a switch on the mainframe, and a GPIB subaddress determined by the mainframe slot in which the
module is installed. If the mainframe GPIB address is set to 705, this becomes the power module’s primary address.
The Agilent 66000A Mainframe mode switch determines the IEEE 488 secondary addresses (also referred to as
subaddresses) of the modules that are installed in the mainframe. With the mainframe mode switch set to MAIN, modules
are assigned secondary addresses of 00 to 07, which correspond to the slot locations indicated on the mainframe. The
mainframe mode switch must be set to MAIN when the mainframe is connected directly to the GPIB. For example, if a
module is installed in slot 3 of a mainframe that is set to GPIB address 705, the complete address of the module is 70503.
The mainframe mode switch must be set to AUX (auxiliary) when the mainframe is serially-linked to another mainframe
that is directly connected to the GPIB. In mainframes that have the mode switch set to AUX, modules are assigned
secondary addresses of 08 to 15. Secondary address 08 corresponds to slot location 0 on the mainframe and secondary
address 15 corresponds to slot location 7 on the mainframe. For example, if a module is installed in slot 3 of a mainframe
that is serially linked to another mainframe at GPIB address 705, the complete address of the module is 70511.
Slot Location
Secondary Address
Module Slot Locations/Addresses
Mainframe Mode Switch = MAIN
0
1
2
3
4
5
6
7
00 01 02 03 04 05 06 07
Mainframe Mode Switch = AUX
0
1
2
3
4
5
6
7
08 09 10 11 12 13 14 15
For details concerning GPIB cabling and addressing, see "Chapter 2 - Installation" in the Agilent 66000A Mainframe Users
Guide.
26
Installation
3
Turn-On Checkout
Introduction
This chapter provides a quick test of the power module functions. See "Chapter 4 - Basic Power Module Commands" for
more details of power module operation.
Note
These procedures assume you have checked and, if required, correctly set the following switches for each
module:
•
the line voltage switch (see Figure 2-1)
•
the configuration switch (see Table 2-2)
•
the output connector Local/Remote switch
The procedures for doing this are given in Chapter 2.
Module Panel Display
The power module display provides the information shown in Table 3-1. There are no operating controls on the power
module.
Table 3-1. Power Module Front Panel Display
INDICATOR
VOLTS
AMPS
CV
CC
Addr
Unr
Dis
Prot
FUNCTION
Digital readout of output voltage
Digital readout of output current
Lights when power module is in constant voltage mode
Lights when power module is in constant current mode
Lights when power module is addressed over GPIB
Lights when power module output is unregulated
Lights when power module output is disabled
Lights when power module protection circuit is activated (overvoltage,
overcurrent, overtemperature, or remote inhibit)
Turn-On Checkout
27
Power Module Turn-On State
When you turn on the mainframe, the power module goes through a self-test. All front panel readout digits and
annunciators turn on briefly. The panel then remains in the state shown in Table 3-1A.
Note
The figure assumes the power module still retains its factory default turn-on state. You can change this
state if desired (see "Chapter 4 - Basic Power Module Commands").
Checking Basic Module Functions
The power module is designed for remote programming over the GPIB. It also can be locally programmed from the
optional Agilent 66001A MPS Keyboard. Table 3-2 gives the SCPI commands for the remotely programmed tests. You
can send these same commands from the keyboard (see "Appendix B").
Table 3-2. Testing Basic Functions with SCPI Commands
Action
Display Response
VOLTS
AMPS
CV
CC
Addr*
Output Voltage (Disconnect Load)
VOLT 5.1
Set output voltage to 5.1 V
0.00
0.00
Off
Off
On
OUTP ON
Enable the output
5. 10
0.00
On
Off
On
Overvoltage Protection
VOLT:PROT 4.9
Activate OVP circuit (by
0.00
0.00
Off
Off
On
setting protection voltage
below output voltage)
VOLT:PROT MAX Clear OVP circuit
5. 10
0.00
Off
Off
On
OUTP:PROT:CLE
Clear OVP circuit
5. 10
0.00
On
Off
On
Save and Recall Functions
*SAV 5
Save present state to
5.10
0.00
On
Off
On
location 5
VOLT 3.55
Set output voltage to 3.55 V
3.55
0.00
On
Off
On
OUTP OFF
Turn off the output
0.00
0.00
Off
Off
On
*SAV 6
Save present state to
0.00
0.00
Off
Off
On
location 6
*RCL 5
Restore state 5
5.10
0.00
On
Off
On
*RCL 6
Restore state 6
0.00
0.00
Off
Off
On
Output Current (With output disabled, short the
output terminals with a wire size sufficient to carry
the maximum current of the module.)
Command
CURR 3.1
Set output current to 3.1
0.00
0.00
Off
Off
amps
OUTP ON
Enable the output
0.00
3.10
Off
On
Overcurrent Protection
CURR:PROT:STAT Activate OCP circuit (by
0.00
0.00
Off
Off
ON
enabling OCP when the
output is shorted)
CURR:PROT:STAT Clear OCP circuit
0.00
0.00
Off
On
OFF
OUTP:PROT:CLE
Clear OCP circuit
0.00
3.10
Off
On
*Addr will not light if the module is controlled from the keyboard.
28
Turn-On Checkout
Dis
Prot
On
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
Off
On
On
Off
Off
Off
Off
On
Off
Off
On
On
Off
On
Off
Off
On
Off
On
On
On
Off
On
Off
Off
In Case Of Trouble
Mainframe Failure
You can assume there is a problem with the mainframe if there is more than one module in the mainframe and none of the
module fans are on. The trouble also is probably in the mainframe if the module fans are on and the their displays are
enabled (see "Configuration Switch" in "Chapter 2 - Installation") but their VOLTS and AMPS displays do not light. If a
module does not appear to be operating but its VOLTS and AMPS display light, move the module to another address slot.
If the above condition still occurs, then the problem probably is in the module.
Module Line Fuse
If a power module’s fan is on but its front panel does not light, the module line fuse may be blown. Proceed as follows:
1.
Remove the power module from the mainframe.
Note
2.
You can remove and insert the power module without turning off the mainframe power provided the
module output is either disabled or is programmed to zero and there is no GPIB bus, trigger bus, or
RI/DFI activity. If you are in doubt, turn off the mainframe power.
Check the line fuse (see Figure 2-1). If it is defective, replace it with one of the same type and rating (for the Agilent
part number, see Table 1-3).
Do not use a slow-blow fuse as a replacement.
3. Replace the power module in the mainframe.
Module Output Connector
If the module panel indicates a normal voltage but there is no output at the load, the problem may be in the output
connector. This is even more probable if the connector has relays. The following tests may isolate the problem:
•
If another module is working normally, use its mainframe slot for the suspected module (be careful to guard against
any difference in module output voltage). If there is still no output, the problem is in the module. If the module has an
output in the new slot, the problem is with its original output connector.
•
To check a suspected connector with a good module, proceed as follows (see DC Module Connectors Installation
Guide for details of the connector and its jumpers):
1.
Disable the power module output (Dis annunciator on).
2.
Remove the output connector from mainframe.
3.
Examine the connector plug for bent pins.
4.
Remove the cover from the output connector.
5.
If there is no relay board, go to step 6. Otherwise, proceed as follows:
a.
Remove the relay board by pulling it straight up.
b.
Examine relay board connector for bent pins.
c.
Examine the connector board to ensure that the required jumpers have been cut to enable relay
operation.
6. Examine the jumpers on the connector board. If any jumpers have been cut, they must be replaced.
Error Messages
A power module may fail either during selftest or while operating (runtime). In either case, the module display may show
an error message indicating the reason for the failure.
Turn-On Checkout
29
Selftest Error Messages
Table 3-3 lists the displayed selftest error messages. All these errors are hardware failures that require service.
Note
If you are using the optional Agilent 66001A MPS Keyboard, it will also display selftest error
messages.
Display
U 1
U 2
U 3
U 4
U 5
U 6
U 7
Failed Test
Internal RAM
External RAM
ROM checksum
(Not used)
(Not used)
12 V supply
5 V supply
Table 3-3. Selftest Error Messages
Display
Failed Test
U 8
Ambient temperature reading
U 9
(Not used)
U 10
Voltage programming, low range
U 11
Current programming, low range
U 12
Voltage programming, high range
U 13
Current programming, high range
The power module also can detect an EEPROM checksum error. This error is not identified by number, but causes the
following symptoms:
•
•
•
•
The power module starts up with both the VOLTS and AMPS full-scale programming and metering ranges
accepting values up to 1000.
Self-test error code 330 is stored in the SCPI error queue where it can be read by software (see "Chapter 5 Error Messages" in the Programming Guide).
The software identify query (*IDN?) returns 0A in the model field.
The calibration password is set to 0.
An EEPROM checksum error can occur due to the following operating conditions:
•
•
•
Excessive number of write cycles to an EEPROM (see Table 1-2). This condition is not recoverable and
requires service.
Loss of ac input power during a checksum calculation. This condition, which is very unlikely, is recoverable.
You may be able to recover by performing the following steps from the controller or keyboard:
1.
Enable the calibration mode (CAL:STAT ON,0)
2.
Save an operating state to EEPROM. (e.g., *SAV 2)
This forces the power module to write to EEPROM and establishes a new checksum.
Runtime Error Messages
Table 3-4 lists the runtime error messages. Runtime errors cease normal power module operation, disable the output, and
display a code on the front panel. The error code is preceeded by "U" and is displayed on both the VOLTS and AMPS
displays. Runtime errors are hardware malfunctions that require service.
Display
U 101
30
Meaning
EEPROM write error
Turn-On Checkout
Table 3-4. Runtime Error Messages
Display
Meaning
U 102
Internal software error
Display
U 103
Meaning
Unexpected interrupt
4
Basic Power Module Commands
Introduction
"Chapter 3 - Language Dictionary" of the Programming Guide describes all the power module commands. This chapter
introduces you to the commands that control the following basic functions:
•
•
•
•
output state
protection circuits
fixed-mode output
list-mode output
•
•
•
triggers
the RFI function
the DFI function
The power module can be programmed from a controller over the GPIB or from an optional Agilent 66001A MPS
Keyboard plugged into the mainframe. In order to apply the information in this chapter, you must have a working
knowledge of either method. Information concerning programming is presented as follows:
Method of Control
Consult
GPIB Controller
Programming Guide for Agilent Series 66lxxA MPS Power
Modules
MPS Keyboard Appendix B of this guide
GPIB Controller
The power module is programmed by SCPI (Standard Commands for Programmable Instruments) commands sent as strings
within your language statements. "Chapter 2 Introduction to Programming" of the Programming Guide explains how to do
this. The syntax of each command in given in Chapter 3 of that guide.
MPS Keyboard
If you have installed the optional MPS keyboard, you can execute the commands given here. You do not have to
understand the details of SCPI programming, because the keyboard menu allows you to step through all commands. If you
have a keyboard, it is highly recommended that you use it until you are familiar with the general concepts of power module
operation.
Note
The keyboard menu omits optional SCPI headers. That is why some commands displayed on the
keyboard will not look exactly like the syntax given in Chapter 3 of the Programming Guide.
Synopsis Of Commands
The following tables summarize the SCPI commands by function. The short form without optional headers is used in this
chapter. For example, the full command for turning on the output as given in the Programming Guide is OUTPut
[: STATe] ON. Here the optional [STATe] (in brackets) is omitted and only the short form (in capital letters) OUTP ON is
used.
The query form of a command (OUTP?) is omitted unless the command is only of the query form (such as
MEAS:VOLT?).
Basic Power Module Commands
31
Controlling the Output State
The following commands control the power module output state:
Command
OUTP ON
OUTP OFF
OUTP1,NOR
OUTP 0,NOR
OUTP: REL 1
OUTP:REL 0
OUTP:REL:POL NORM
OUTP:REL:POL REV
Table 4-1. Power Module Output Commands
Function
Enables the output.
Disables the output.
(If an optional output relay is installed, the command is executed in a sequence that prevents
"hot switching".)
Enables the output without affecting the output relay.
Disables the output without affecting the output relay.
Closes the (optional) output relay contacts.
Opens the (optional) output relay contacts.
Makes the (optional) output relay polarity the same as the module output.
Makes the (optional) output relay polarity opposite to the module output. The output is
disabled while the relay polarity is being reversed.)
Controlling Protection Functions
The following commands control the power module protection circuits.
Command
CURR:PROT:STAT ON
CURR: PROT: STAT OFF
VOLT:PROT <value>
OUTP:PROT:CLE
OUTP:PROT:DEL .05
Table 4-2. Power Module Protection Commands
Function
Turns on the OCP (overcurrent protection), which disables the output if the output
current exceeds the programmed current.
Turns off the current protection.
Programs the OVP (overvoltage protection) level. The protection circuit will trip if the
output voltage exceeds the OVP level.
Clears any active protection conditions (panel Prot annunciator goes off). Before the
command can comply, you must remove the condition that caused the protection circuit
to trip.
Specifies a delay (in seconds) between the time a protection condition is detected and
the actual activation of the protection circuit. (Does not apply to OVP.)
Controlling Fixed-Mode Output
The following commands control the power module fixed-mode voltage and current output.
Command
CURR:MODE FIX
CURR <value>
CURR:TRIG <value>
MEAS:CURR?
VOLT:MODE FIX
VOLT <value>
VOLT: TRIG <value>
MEAS:VOLT?
VOLT:SENS?
32
Table 4-3. Power Module Fixed-Mode Output Commands
Function
Sets the current mode to fixed (as opposed to list). FIX is the factory default power on
state.
Programs the immediate output current level (in amperes).
Programs the triggered output current level (in amperes). See "Trigger Commands".
Returns the present value of the output current.
Sets the voltage mode to fixed (as opposed to list). FIX is the factory default power on
state.
Programs the immediate output voltage level (in amperes).
Programs the triggered output voltage level (in amperes). See "Trigger Commands".
Returns the present value of the output voltage.
Returns the position of the output connector sense switch (INT is local; EXT is remote).
Basic Power Module Commands
Controlling List-Mode Output
The following commands control the power module list-mode voltage and current output. Lists require a trigger to begin
execution. For an explanation of lists and triggers, see "Chapter 5 - Synchronizing Power Module Output Changes": in the
Programming Guide.
Table 4-4. Power Module List-Mode Output Commands
Command
Function
CURR:MODE LIST
Sets the current mode to list (as opposed to fixed).
LIST:CURR <value>,<value> Programs the output current values (or points) in the list. When you execute the list,
the output will sequentially step through the list values.
LIST:CURR:POIN?
Returns the number of points programmed in the current list.
VOLT:MODE LIST
Sets the voltage mode to list (as opposed to fixed).
LIST:VOLT <value>,<value>
Programs the output voltage values (or points) in the list. When you execute the list,
the output will sequentially step through the list values.
LIST:VOLT:POIN?
Returns the number of points programmed in the voltage list.
LIST:DWEL <value>,<value> Programs the dwell value, in seconds, for each value in a voltage or current list.
There must be one dwell value for each value in the voltage or current list.
LIST:DWEL:POIN?
Returns the number of points programmed in the dwell list.
LIST: STEP ONCE
Commands the list to execute only one value (point) when a trigger is received. This
specifies a trigger-paced list.
LIST: STEP AUTO
Commands the list to execute all values (points) when a trigger is received. This
specifies a dwell-paced list.
Controlling Triggers
The following commands control the power module trigger subsystem. For a detailed description of this subsystem, see
"Chapter 5 - Synchronizing Power Module Output Changes": in the Programming Guide.
Command
INIT
INIT:CONT
TRIG:SOUR
BUS|EXT|HOLD|LINK| TTLT
TRIG:DEL <value>
TRIG *TRG
TRIG:LINK <parameter>
OUTP: TILT ON
OUTP: TTLT OFF
OUTP:TTLT:SOUR
BUS|EXT|HOLD|LINK
OUTP:TTLT:LINK
Table 4-5. Power Module Trigger Commands
Function
Initiates the trigger subsystem to detect one trigger. No triggers will be processed
unless the subsystem is initiated.
Keeps the trigger subsystem continuously initiated so it will process each incoming
trigger.
Specifies which trigger source is to be accepted by the trigger subsystem (see the
Programming Guide). HOLD prevents response to all triggers.
Programs the delay time (in seconds) between the detection of a trigger and its
execution.
Either command sends a trigger signal to the power module over the GPIB bus.
When TRIG:SOUR LINK is programmed, this command specifies the link parameter
for the trigger (see Programming Guide).
Enables the power module Trigger Out signal, which is a 20-µs negative-true TTL
pulse available at the mainframe TRIGGER OUT jack. To use this output, you must
program a TTLT trigger source (OUTP:TTLT:SOUR).
Disables the power module Trigger Out signal.
Specifies which trigger source is to be used for the Trigger Out signal. HOLD
prevents a response to any source.
When OUTP: SOUR LINK is programmed, this command specifies the link
parameter for the trigger (see Programming Guide).
Basic Power Module Commands
33
Using the RI/DFI Functions
RI (Remote Inhibit) Input
The signal applied to the mainframe digital connector INH input (see "Chapter 3 Connections" of the mainframe
Installation Guide) is the RI (remote inhibit). The module function switch described in "Chapter 2 - Installation" allows
you to enable or disable the RI input and, when enabled, to specify RI as either latching or nonlatching. If the module
function switch is set to enable RI, then the input signal will disable the power module output. If the function switch is also
set to RI nonlatching, then removing the signal from the INH input restores the power module output. If the function switch
is set to RI latching, an RI status bit is latched and the power module remains disabled after the input signal is removed.
The RI status bit is removed either by reading the Status Questionable Event register (STAT: QUES?) or by clearing it
(*CLS). See the Programming Guide for specifics.
The detected RI bit can be used to generate a DFI signal that appears at the mainframe FLT output. This signal, in turn, can
be wired to the RI inputs of other power modules to also disable their outputs (see the wiring diagram in Chapter 3 of the
mainframe Installation Guide).
DFI (Discrete Fault Indicator) Output
When the DFI function is enabled (OUTP:DFI ON), you can program the Status Subsystem to cause any status condition
(including RI) to generate a DFI output, which appears as a TTL low-true signal at the mainframe digital connector FLT
output. See "Chapter 4 - Status Reporting" in the Programming Guide for details of programming the Status Subsystem.
Command
OUTP:DFI ON
OUTP:DFI OFF
OUTP: DFI: SOUR LINK
OUTP: DFI: LINK <parameter>
Table 4-6. DFI Output Commands
Function
Enables the DFI function.
Disables the DFI function.
Specifies the source for DFI events. The only source is LINK.
Specifies what power module status events are linked to the DFI function. Table 3-1
in the Programming Guide identifies all the DFI link parameters.
Only one parameter may be specified for OUTP: DFI: LINK, such as OUTP: DFI: LINK CC. However, you can specify
entire status groups by specifying a summary bit. For example, OUTP: DFI: LINK QUES specifies the Questionable Status
summary bit, which is the logical OR of OV, OC, OT, RI, and UNR. The default link parameter SUM3 is the logical OR of
the QUES, OPER, and ESB summary bits. This gives DFI access to all three status register groups (see "Chapter 4 - Status
Reporting" in the Programming Guide for more information).
Changing The Power On State
Switch 6 of the module function switches (see "Chapter 2 - Installation") determines the state of the power module when
you turn it on. With the switch in the factory-default position (1), the module turns on in the reset (*RST) state. You will
find the parameters for this state listed under the *RST command in "Chapter 3 - Language Dictionary" of the
Programming Guide. If you store your own parameters in location 0 (*SAV 0), and set the switch to 0, then the module
will assume that state when you turn it on.
Note
34
The *RST state is a safe turn-on state that should not be replaced without careful consideration.
Basic Power Module Commands
A
Calibration
Introduction
The power module may be calibrated either over the GPIB from a controller or from an Agilent 66001A Modular Power
System keyboard. Instructions are included for either method. The procedures given here apply to all Series 66l0xA Power
Modules.
Note
The Agilent 66000A mainframe does not require calibration.
Enabling Or Disabling The Calibration Function
There are two ways of controlling access to the calibration function. One is by hardware and the other is with software.
Hardware Control
The CAL positions of the power module function switch (see Table 2-1 in "Chapter 2 Installation") allows hardware control
over the calibration function. The factory-default setting is for normal calibration. Setting the switches to the Inhibit
calibration position prevents any calibration from being performed.
Software Control
The password parameter of the CAL: STAT command allows software control over the calibration function. The standard
factory password is the module model number (for example, 66102 for the Agilent 66102A). By changing the password,
you can either restrict or allow unlimited access to the calibration function (see "Changing the Calibration Password").
Changing The Calibration Password
You can change the password only when the module is in the calibration mode (which requires you to know the present
password). To change the password from 66101 to 81591, send the following commands:
CAL:STAT ON, 66102
CAL:PASS 81591
If you change the password to 0, then all password protection is removed. The Calibration Subsystem then will accept the
CAL: STAT ON command without a password.
Performing a Calibration
Perform the procedures in the order given. The assumed password is 66102; use your actual password in the procedures.
Important
These instructions do not include verification procedures. If you need to perform verification as part of
your calibration procedure, refer to the Series Agilent 66I0xA Service Manual.
Calibration
35
Equipment Required
The equipment listed in Table A-1, or equivalent, is required for calibration.
Equipment
Voltmeter
Shunt
Agilent 66101A,
66102A
Agilent 66103A,
66104A, 66105A,
66106A
GPIB Controller or
Keyboard
Table A-1. Equipment Required for Calibration
Characteristics
D-c accuracy 0.005%, 6 digits; resolution 1 µV
0.01Ω, 100 A, 100 W, 0.04% @ 100 W, 0.01% @ 1W,
power coeff. 0.0004%/watt in air
0.1 Ω, 15 A, 25 W, 0.04% @ 25 W, 0.01% @ 1W, power
coeff. 0.002%/watt in air
Recommended Model
Agilent 3458A
Guildline 9230/100
Guildline 9230/15
HP Vectra (or IBM compatible) with GPIB Interface or Agilent BASIC series Agilent 66001A
MPS
Calibrating Voltage
Calibration may cause dangerous voltages to be present at the power module output.
The following procedure calibrates the output voltage and the overvoltage protection (OVP). During voltage calibration,
you will enter two readings from the external DVM. You must calibrate the voltage before calibrating the OVP. You do
not have to enter any external readings when calibrating the OVP.
Keyboard Entry
Table A-2. Voltage Calibration Procedure
Controller Entry †
Connect the equipment as shown in Figure A-lA
Function
Output Voltage Calibration
*RST
Reset the power module
(Before proceeding, set the module output, via the keyboard or the GPIB, for 1.0 V at 0.5 A)
OUTP ON
Enable the output
CAL:STAT 1,66102
Using your password, enable the calibration
mode
CAL:VOLT:LEV MIN
Select the lower calibration point
CAL: VOLT: DATA <NRf>
Enter the digital voltmeter reading
CAL:VOLT:LEV MAX
Select the upper calibration point
CAL:VOLT:DATA <NRf>
Enter the digital voltmeter reading
Note:
The following step overwrites the existing voltage calibration constants stored in nonvolatile memory.
CAL:SAV
Save the new calibration constants
Overvoltage Protection Calibration
If the optional output relay is installed, either disconnect it or set it to the OFF (open) state.
CAL:VOLT:PROT
Perform OVP calibration
Note: It takes a few seconds for the power module to make the measurement. When completed, the new constant is
automatically stored in nonvolatile memory.
† See Figure A-2 for program listing.
‡ Enter the voltage measured by the external digital multimeter.
36
Calibration
Figure A-1. Calibration Test Setup
Calibrating Current
The following procedure calibrates the output current. During the calibration, you will make two voltage measurements
across the output shunt and enter the computed current.
Keyboard Entry
Table A-3. Current Calibration Procedure
Controller Entry †
Function
OUTP OFF
Disable the output
Connect the equipment as shown in Figure A-lB.
(Before proceeding, set the module output, via the keyboard or the GPIB, for 1.0 V at 0.5 A.)
OUTP ON
Enable the output
CAL:STAT 1,66102
Using your password, enable the calibration
mode
CAL:CURR:LEV MIN
Select the lower calibration point
Wait for the meter reading to stabilize. Then read the meter and enter the calculated current value.‡
CAL: CURR:DATA <NRf>
Enter lower current value
CAL:CURR:LEV MAX
Select the upper calibration point
Wait for the meter reading to stabilize. Then read the meter and enter the calculated current value.‡
CAL: CURR: DATA < NRf>
Enter the upper current value
Note: The following step overwrites the existing current calibration constants stored in nonvolatile memory.
CAL:SAV
Save the new calibration constants
† See Figure A-2 for program listing.
‡ Calculate the current value as follows:
VR
I=
R
Calibration
37
Using The CAL:AUTO Command
Normal calibration procedures also calibrate the readback circuits that respond to the MEAS: CURR? and MEAS: VOLT?
commands. During normal operation, the readback accuracy is affected by temperature changes within the power module.
Use of the CAL:AUTO command reduces the temperature error component of the readback accuracy specification. See
"Chapter 3 - Language Dictionary" of the Programming Guide for information about this command.
Recovering The Factory Calibration Constants
The original factory calibration constants are stored in EPROM and can be recovered. This may prove helpful in situations
where miscalibration is suspected and it is not possible to recalibrate. To restore factory calibration, proceed as follows:
1. Remove the power module from the mainframe and set the calibration switches to the factory position (see Table 21 in "Chapter 2 - Installation").
2. Replace the power module and cycle the power (on and then off).
3. Remove the power module from the mainframe and restore the calibration switches to the normal position.
4. Replace the module in the mainframe.
The module now has its original factory calibration constants. However, password protection has been removed from the
CAL:STAT ON command.
Recovering From A Lost Calibration Password
The standard factory password is the module model number (for example, 66102). If no one has changed the password,
entering the model number will enable the calibration mode (for example, CAL:STAT ON,66102).
If the password is unknown, then the only alternative is to perform the procedure given under "Recovering the Factory
Calibration Constants". This removes the password protection from the CAL: STAT ON command. However, it also
changes the calibration constants to their original factory values.
Calibration Error Messages
If you enter calibration commands from the keyboard, it will display the error messages listed in Table A-4.
CAL ERROR
DOES NOT CAL
PASSWD ERROR
WRONG MODE
Table A-4. Keyboard Calibration Error Messages
An entered value is not within acceptable range
Computed calibration constant is out of range
You entered an incorrect password
The power module is not in CV or CC mode, as required
Agilent Basic Calibration Program
The following program can be run on any controller operating under Agilent BASIC. The assumed slot address is 0 and
calibration password is 66101. If required, change these parameters in the appropriate statements.
38
Calibration
10
! VOLTAGE CALIBRATION PROGRAM
20
! CONNECT INSTRUMENTS AS SHOWN IN FIGURE A-la
30
!
40
DIM Resp$[255],Err_msg$[255]
50 Volt_cal:
!
60
Err_found=0
70
INPUT "CONNECT INSTRUMENTS AS SHOWN IN FIGURE A-la ... Press any key to continue.” ,Resp$
80
Resp$=""
90
ASSIGN @Ps TO 70500
! ASSIGN POWER SUPPLY GPIB ADDRESS
100
! NOTE: DEFAULT MODULE SLOT IS 0
110
!
120 OUTPUT @Ps;"*RST;OUTPUT ON"
! INITIALIZE POWER SUPPLY
130 OUTPUT @Ps;"VOLT MAX"
140 OUTPUT @Ps;"CURR MAX"
150 OUTPUT @Ps;"CAL:STATE ON, 66101"
! PASSWORD IS OPTIONAL - ONLY
160
! REQUIRED IF SET TO NON-ZERO
170
! NOTE: DEFAULT = MODEL NUMBER
180 OUTPUT @Ps;"CAL:VOLTAGE:LEVEL MIN"
190 INPUT "ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER",Volt_read
200 OUTPUT @Ps;"CAL:VOLTAGE ";Volt_read
210 OUTPUT @Ps;"CAL:VOLTAGE:LEVEL MAX"
220 INPUT "ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER",Volt_read
230 OUTPUT @Ps;"CAL:VOLTAGE ";Volt_read
240 OUTPUT @Ps;"CAL:VOLTAGE:PROT"
! CALIBRATE OVERVOLTAGE PROTECTION
250
! CIRCUITRY
260 GOSUB Save_cal
270 IF Err_found THEN
280
INPUT "ERRORS have occurred, REPEAT VOLTAGE CALIBRATION (Y OR N)?",Resp$
290
IF TRIM$(UPC$(Resp$[ l,l ]))="Y" THEN GOTO Volt_cal
300 END IF
310 IF Err_found THEN
320
PRINT "VOLTAGE CALIBRATION NOT SAVED"
330
ELSE
340
PRINT "VOLTAGE CALIBRATION COMPLETE”
350
END
360
!
370
! CURRENT CALIBRATION PROGRAM
380
! CONNECT INSTRUMENTS AS SHOWN IN FIGURE A-lb
390
!
400
Current_cal:
!
410
Err_found=0
420
INPUT "CONNECT INSTRUMENTS AS SHOWN IN FIGURE A-lb ... Press any key to continue.",Resp$
430
Resp$=""
440
OUTPUT @Ps;"CAL:STATE ON, 66101"
! PASSWORD IS OPTIONAL - ONLY
450
! REQUIRED IF SET TO NON-ZERO
460
! NOTE: DEFAULT = MODEL NUMBER
470
!
480
! REFER TO TABLE A-1 FOR CORRECT SHUNT VALUE FOR MODEL BEING CALIBRATED
490
!
Figure A-2. Agilent BASIC Calibration Program
Calibration
39
700
710
720
730
740
750
760
770
780
790
800
810
820
830
840
850
860
870
500
INPUT "ENTER VALUE OF CURRENT SHUNT BEING USED",Shunt_val
510
OUTPUT @Ps;"CAL:CURRENT:LEVEL MIN"
520
INPUT "ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER",Volt_read
530
Current=Volt_read/Shunt_val
540
OUTPUT @Ps;"CAL:CURRENT ";Current
550
OUTPUT @Ps;"CAL:CURRENT:LEVEL MAX"
560
INPUT "ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER",Volt_read
570
Current=Volt_read/Shunt_val
580
OUTPUT @Ps;"CAL:CURRENT ";Current
590
GOSUB Save_cal
600
IF Err_found THEN
610
INPUT "ERRORS have occurred, REPEAT CURRENT
CALIBRATION (Y OR N)?",Resp$
620
IF TRIM$(UPC$(Resp$[ l,l ]))="Y" THEN GOTO
Current_cal
630
END IF
640
IF Err_found THEN
650
PRINT "CURRENT CALIBRATION NOT SAVED"
660
ELSE
670
PRINT "CURRENT CALIBRATION COMPLETE"
680
END IF
690
STOP
Save_cal:
! SAVE CALIBRATION CONSTANTS
REPEAT
OUTPUT @Ps;"SYSTEM:ERROR?"
ENTER @Ps;Err_num,Err_msg$
IF Err_num<>0 THEN
PRINT "ERROR: ";Err_msg$
Err_found=l
END IF
UNTIL Err_num=0
IF NOT Err_found THEN
INPUT "SAVE CALIBRATION CONSTANTS (Y OR N)?",Resp$
IF TRIM$(UPC$(Resp$[1,1]))="Y" THEN
OUTPUT @Ps;"CAL:SAVE"
END IF
END IF
OUTPUT @Ps;"CAL:STATE 0"
RETURN
END
Figure A-2. Agilent BASIC Calibration Program (continued)
40
Calibration
B
Using The Agilent 66001A MPS Keyboard
Introduction
This appendix describes the Agilent 66001A Modular Power System (MPS) Keyboard, which is available as an option for
the Agilent 66000A Modular Power System.
The Agilent 66001A MPS Keyboard lets you program the Agilent 66000A Modular Power System without having to
connect it to a computer. With the keyboard, you can:
■
■
■
■
■
Access any module in the mainframe that the keyboard is plugged into.
Display operating and status information from the selected module.
Control the module from the fields that appear on the display.
Program the module using SCPI commands and queries.
Read error messages.
Connecting The Keyboard
The keyboard plugs into a jack on the front of the mainframe as indicated in the following figure. A keyboard jack is also
available on the rear panel. The keyboard can be plugged in or out while the mainframe is on.
Note
Do not connect more than one keyboard to a mainframe.
Agilent 66001A MPS Keyboard
41
Keyboard Description
This section briefly explains the various areas on the keyboard as indicated in the following figure:
 DISPLAY
Subaddress and
Instrument
The subaddress of the presently selected module appears on the left side of the display. The
instrument field displays an instrument number when the module contains more than one instrument.
Power supply modules do not use this field.
Meter Area
The predominant area of the display presents operating and status information about the selected
module. This is referred to as the meter area of the display. Power supply modules display the
output voltage and current as well as the operating mode in the meter area of the display. Refer to
"Using the Display" for more information.
The meter area is also used to display the SCPI commands when the Command function is active.
Use the meter area to construct the SCPI command and then send the command to the module.
Annunciators
Annunciators on the bottom of the display provide additional information on the operation of the
presently selected module. Active annunciators can indicate:
Shift
Unr
Dis
Prot
Err
Cal
Rmt
Lsn
Tlk
SRQ
or
Lock key has been pressed.
The
The module is unregulated.
The module’s output is disabled.
One of the protection features has been activated.
There is an error message in the SCPI error queue.
Calibration mode is enabled.
The module is in remote mode (keyboard disabled).
The module is addressed to listen over the GPIB.
The module is addressed to talk over the GPIB.
The module has generated a service request.
42
Agilent 60001A MPS Keyboard
ô SYSTEM KEYS
This key switches from remote operation (over the GPIB) to local operation using the keyboard.
Press
when the Rmt annunciator is on to enable the keyboard.
This key moves the cursor to the subaddress field so you can select another module. Use the Entry
or Select keys to enter another subaddress.
í FUNCTION KEYS
This function continuously displays operating information about the selected module. The Meter
function is the turn-on default function, and is also in effect whenever the mainframe is in remote
mode.
This function lets you send a SCPI command or query to the selected module. Use the letter keys or
the Select keys to select the SCPI command. Refer to the power module Programming Guide for a
complete description of the SCPI commands. Refer to the end of this appendix for the SCPI
command tree used by the keyboard.
This function displays status information about the following QUEStionable and CONDition status
register bits: CV, CC, OV, OC, OT, RT, WTG, and DWE. Refer to the power module
Programming Guide for a complete description of the QUEStionable and CONDition status
registers.
This function displays the error messages whenever the Err annunciator on the display indicates that
an error has occurred.
([Shift] [Meter])
([Shift] [Command])
This function lets you format the meter area of the display. Power supply modules do not use
additional meter formats.
This function lets you send the next command entered from the keypad to all the modules in the
mainframe. The subaddress field on the display indicates "ALL" when this function is active. You
each time you want to send a command to all modules.
must press
This function clears any latched protection features that have tripped.
([Shift] [Status])
÷ SELECT KEYS
When the Meter function is active, these keys let you move across the display so that you can enter
or change values in the selected fields. When the Command function is active, these keys let you
move across the various levels of the command tree structure. Numeric command parameters
default either to zero or the last programmed value.
When the Meter function is active, these keys let you increment and decrement the numeric values in
the selected field. When the Command function is active, these keys let you scroll up and down
through the choices at each level of the command tree.
This key lets you recall up to five previous commands that were sent. You can edit any recalled
command. Press
to send the command.
This key exits any action and returns the display to the Meter function. If the Command function is
active, the displayed command is not executed (same as
).
Agilent 66001A MPS Keyboard
43
û ENTRY KEYS
These keys let you enter numeric values. Values can be entered directly. If the Meter function is
active, the display automatically switches to the Command function with the appropriate command
for programming the metered mode on the display.
This key enters the decimal point.
This key is used to separate multiple command arguments such as those used with a List command.
These keys let you increment and decrement the numeric values in the selected field when the Meter
function is active. Note that numeric values change in larger steps the longer these keys are held
down. When the Command function is active, these keys let you increment and decrement numeric
command parameters.
These keys let you assign a polarity to a value that is entered with the numeric Entry keys. You
must enter the polarity before you enter the number.
This key lets you enter the exponent of a value that is entered with the numeric Entry keys. Enter
the exponent after you enter the number.
This key backspaces over and deletes individual digits in a numeric entry field (same as
).
This key clears the entire numeric entry field.
This key executes a command.
ø LETTER KEYS
These keys let you select SCPI commands when the Command function is active. Letter keys select
the choices that begin with the letter that is pressed and move across the command tree when
additional selections are available.
ed letters make selections by scrolling through the choices
at the present command level that start with the shifted letter.
Note
Nothing happens if a letter is pressed that has no corresponding SCPI command.
This key is the prompt for the SCPI instrument commands.
This key is the prompt for the GPIB commands (IEEE-488.2).
This key is the prompt for SCPI queries. Append the prompt to the query. The result of the query
appears on the display after it is entered.
This key accesses the shifted key functions. The Shift annunciator on the display indicates that the
key was depressed. The annunciator turns off when the next key is pressed.
This key locks the shift key functions. The Shift annunciator on the display indicates when the shift
functions are locked.
This key backspaces over and deletes individual digits in a numeric entry field (same as
This key executes a command.
44
Agilent 60001A MPS Keyboard
).
Using The Display
Changing or Entering Values
The following figure is an example of the keyboard display when a power module is addressed and the Meter function is
active:
The keyboard continuously displays measured voltage and current. The blinking cursor initially highlights the voltage field,
which indicates that the value in that field can be changed using the numeric Entry keys. You can also use the
and
keys to move the cursor across the display to select other fields that you want to change.
Press
repeatedly to increment the voltage value.
You can also use the numeric Entry keys to enter a new value directly into the field. The display will switch to the
Command function when the numeric Entry keys are used. Enter the new value next to the SCPI command, and execute the
key.
command with the
Displaying Status
key to view the present state of the following status bits of the addressed module: CV, CC, OV, OC, OT,
Use the
RT, WTG, and DWE. A Status mnemonic appears on the display only if the corresponding bit has been set in the status
registers. In the following example, the display indicates that the module is in constant voltage (CV) mode and is waiting
(WTG) for a trigger input.
The status response remains on the display until you press another key to do something else, or until the module goes into
remote mode. Press
or
to return to the meter function.
Agilent 66001A MPS Keyboard
45
Sending SCPI Commands
As described in the power module Programming Guide, SCPI commands are organized into message units. The keyboard
can only send one message unit at a time; you cannot combine message units. Also, optional headers within a command do
not appear on the display. There are two ways to construct message units using the keyboard:
■
■
locate and append each SCPI header to the message unit with the Select keys, or
directly construct the message using only the first letter of each header with the letter keys.
The figure at the end of this appendix shows the SCPI command tree structure that is used by the keyboard. When the
key, the VOLTage command appears on the display for power supply
command function is selected with the
modules.
The Select keys let you move up and down as well as across the various levels of the command tree. When numeric
parameters are accessed with the Select keys, the value either defaults to zero or the last programmed value.
Letter keys let you directly access headers by typing the first letter of the header. Letter keys select headers by moving
across the levels of the command tree. If more than one header starts with the same letter at a specific level in the command
tree, the first choice in that level is selected. Use the
or
key to select the command you want to use. You can also
use the
ed letters to scroll through the available choices at the present command level that start with the shifted letter.
Command Example
The following examples show you how to use the Select keys or the letter keys to construct and send commands to the
addressed module. In this example, the voltage protection level of a power supply module is being set to 7 volts.
46
Agilent 60001A MPS Keyboard
Press
to execute the command.
Using the letter keys to directly access and send commands is much faster than using the Select keys to find and then send
commands. Of course, this method is faster only if you know which commands you are going to program. The following
sequence shows the same example using the letter keys:
Press
to execute the command.
Query Example
Queries return data from the addressed module. Use the Select keys or the letter keys to construct and send queries to the
addressed module in the same way that you send commands. When you enter the query, the display returns a value. In the
following example, the power module is queried as to its actual voltage output:
Agilent 66001A MPS Keyboard
47
The query response remains on the display until you press another key to do something else, or until the module goes into
remote mode. Press
or
to return to the meter function.
To query the programmed setting of any command parameter, use the cursor control keys to access the parameter field of
the command. The value that appears is the last programmed value. In the following example, the module is queried as to
its voltage protection setting:
You can now change the voltage protection level or press
Note
or
to return to the meter function.
after the command to turn the
If a SCPI command has a corresponding query, you can also add the
command into a query. If a command does not have a corresponding query, the
key is ignored.
Error Example
If you make an error when you are constructing a command, the display will inform you that an error has occurred when you
enter the command. The following message is an example of an error that has occurred because the data entered for a
parameter was out of the range of the power module.
Either press
to recall and edit the command that caused the error or press
message and return to the meter function.
or
to clear the
With the keyboard, you can also read back any system error that has occurred when the module is operating in remote mode.
The Err annunciator on the display indicates that there is an error in the SCPI error queue. If the module is in remote mode,
you must first press
to get out of remote mode. The following example shows how to read error messages when the
module is in remote mode:
48
Agilent 60001A MPS Keyboard
If the Err annunciator is still on after the error message is displayed, it means there are additional error messages in the
SCPI error queue. Press
to display the other messages. Each time you press the
key it removes one error
from the error queue.
SCPI Command Tree
The following figure illustrates the SCPI command tree used by the keyboard.
Agilent 66001A MPS Keyboard
49
50
Agilent 60001A MPS Keyboard
Index
A
address slot, 20
ampere capacity, 21
annunciators, display panel
Addr, 27
CC, 27
Dis, 27
Prot, 27
Unr, 27
C
cables
GPIB, 15
serial link, 15
calibrating current, 37
calibrating voltage, 36
calibration, 35
constants, 38
equipment for, 36
password, 35, 38
program for, 39
verification of, 35
capacitive loads, 26
CC mode, 11
checkout, output, 28
checksum error, 28
commands (see SCPI)
commands, common, 46, 50
commands, subsystem, 46, 50
connector, FLT/INH, 34
connector, output, 21, 22, 25, 29
controller, GPIB, 31
CV mode, 11
D
default state (see power-on state)
DFI
description of, 1-2
digital connector pins for (see Chapter 3 in
Installation Guide)
examples of use , 34
OUTP:DFI commands for (see Chapter 3 in
Programming Guide)
signal electrical characteristics (see Chapter 1 in
Installation Guide)
status parameter links for (see Chapter 3 in
Programming Guide)
SUM3 status bit for (see Chapter 4 in Programming
Guide)
display panel, 27
downprogramming, 11
E
EEPROM, 30
error messages, display panel
calibration, 38
runtime, 30
selftest, 30
system, 30
error messages, keyboard, 49
F
factory-default state, 18
fault indicator (see FLT)
fixed-mode operation, 28, 32
FLT input (see DFI)
fuse, line, 15, 18, 29
G
ground, earth, 9, 21
ground, signal, 21
GPIB address
changing, 26
determining, 26
primary, 26
subaddress, 26, 42
GPIB capabilities, 14
H
hardware, 15
I
identification, module, 9
impedance, output, 11
indicators, display panel
AMPS, 27
VOLTS indicator, 27
inductive loads, 26
INH (see RI)
initiating triggers, 33
isolation, 32
K
keyboard, 41
keyboard annunciators
Cal, 42
Dis, 42
Err, 42
Index
51
Index (continued)
Lsn, 42
Prot, 42
Rmt, 42
Shift, 42
SRQ, 42
Tlk, 42
Unr, 42
keyboard cursor, 45
keyboard display, 42, 45
keyboard entry keys, 44, 45
keyboard function keys, 43
keyboard jack, 41
keyboard keys
, 44
, 44
, 44
, 44
, 44
, 43, 45, 47
, 43, 45
, 43, 46
, 43, 46, 47
, 44
, 44
, 43, 46, 47
, 43
, 44
, 44, 45, 47, 48
, 43
, 43, 48
, 43, 49
, 43, 48
, 43
, 44
, 43
, 43, 48
, 44, 46
, 44
, 43, 45
, 43
, 44, 45
, 44
keyboard letter keys, 44
keyboard number keys, 44
52
Index
keyboard select keys, 43, 46
keyboard system keys, 43
keyword, optional, 31
L
language, SCPI (see SCPI)
LCD (see display)
lists, 10, 33
list-mode operation, 33
load, capacitive, 26
load impedance, 11
load,inductive, 26
local sensing, 21
M
manual, change sheet, 17
manuals, instruction, 9, 10
N
nonvolatile memory, 29
O
OCP, 28, 32
output connector, 15, 29
output curve, 15
output impedance, 11
output noise, 23
output rating, 15, 23
overcurrent protection (see OCP)
overvoltage protection (see OVP)
OVP, and battery charging, 26
OVP, clearing, 32
OVP, and remote sensing, 26
OVP, and status, 45
P
parallel operation, 23
password, calibration, 35, 38
power-on state, 28
location 0 state, 34
*RST state, 34
primary address (see GPIB address)
programming, from a controller, 31
programming, from a keyboard, 31, 41
programming current, 28, 32
programming protection circuits, 28, 32
programming triggers, 33
programming voltage, 28, 32
pull tab, 20
Index (continued)
R
remote inhibit (see RI)
RI
description of , 10
digital connector pins for (see Chapter 3 in
Installation Guide)
examples of use , 34
example of wiring (see Chapter 3 in Installation
Guide)
mainframe input signal (see Chapter 5 in
Programming Guide)
RI Questionable Status bit (see Chapters 3 and 4 in
Programming Guide)
signal electrical characteristics (see Chapter 1 in
Installation Guide)
*RST state (see power-on state)
recalling states, 28
relay, output, 10, 25, 29
remote sensing, 13, 21, 22, 23
reverse current, 13, 25
reverse voltage, 25
S
safety class, 9
saving states, 28
SCPI
command headers, 31, 50
command tree, 50
error queue, 50
optional commands, 31, 50
query form, 31, 48
SCPI commands, 10, 28, 32, 33
CURR, 32
CURR: MODE, 32
CURR:PROT:STAT,32
CURR: TRIG, 32
INIT, 33
INIT:CONT, 33
LIST: CURR, 33
LIST: CURR: POIN, 34
LIST: DWEL, 34
LIST:DWEL:POIN, 34
LIST: STEP, 34
LIST: VOLT, 33
MEAS:CURR?, 32
MEAS: VOLT?, 32, 50
OUTP, 32
OUTP: REL, 32
OUTP: DFI, 34
OUTP:DFI: LINK, 34
OUTP: DFI: SOUR, 34
OUTP:TTLT, 33
OUTP:TTLT:LINK, 33
OUTP:TTLT:SOUR, 33
*TRG, 33
TRIG, 33
TRIG: LINK, 33
TRIG: SOUR, 33
VOLT, 32, 46
VOLT:PROT, 32, 47
VOLT:PROT: CLE, 32
VOLT: TRIG, 32
secondary address (see GPIB subaddress)
selftest, power-on, 28
sense leads, 22
serial cable, 15
serial number, 9
series operation, 24
shunt, calibration, 35
status bits, 34
CC, 45
CV, 45
DWE, 45
OC, 34, 45
OT, 34, 45
OV, 34, 45
RI, 34
RT, 45
UNR, 34
WTG, 45
switch, configuration, 17, 18
calibration, 18, 19
display, 18, 19
power-on state, 18, 19
RI, 18, 19
switch, line voltage, 18
switch, Local/Remote, 19, 25
T
triggers, 10, 33
trigger commands, 33, 49
triggers, initiating, 33
TRIG IN, 10
turn-on state (see power-on state)
U
unregulated operation, 10
V
voltage readback, 22, 32
W
wire size, 21, 23
Index
53
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54
Agilent Sales and Support Office
Manual Updates
The following updates have been made to this manual since the print revision indicated on the title page.
4/15/00
All references to HP have been changed to Agilent.
All references to HP-IB have been changed to GPIB.
6/21/02
The serial number and option number information in chapter 1 has been updated.