Keithley 2510, -AT SourceMeter Service Manual

Models 2510 and 2510-AT
TEC SourceMeter®
Service Manual
A GREATER MEASURE OF CONFIDENCE
WARRANTY
Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a
period of 1 year from date of shipment.
Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables,
rechargeable batteries, diskettes, and documentation.
During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in
Cleveland, Ohio. You will be given prompt assistance and return instructions. Send the product, transportation
prepaid, to the indicated service facility. Repairs will be made and the product returned, transportation prepaid.
Repaired or replaced products are warranted for the balance of the original warranty period, or at least 90 days.
LIMITATION OF WARRANTY
This warranty does not apply to defects resulting from product modification without Keithley’s express written
consent, or misuse of any product or part. This warranty also does not apply to fuses, software, non-rechargeable
batteries, damage from battery leakage, or problems arising from normal wear or failure to follow instructions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES.
NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR
ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF
THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS
BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF REMOVAL AND INSTALLATION,
LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAMAGE TO PROPERTY.
Keithley Instruments, Inc.
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1-888-KEITHLEY (534-8453) • www.keithley.com
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2/02
Models 2510 and 2510-AT TEC SourceMeter®
Service Manual
All references in this manual to the Model 2510 also apply to the
Model 2510-AT unless otherwise specified.
©2000, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
Fourth Printing, February 2002
Document Number: 2510-902-01 Rev. D
Manual Print History
The print history shown below lists the printing dates of all Revisions and Addenda created
for this manual. The Revision Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between Revisions, contain important change information that the user should incorporate immediately into the manual. Addenda are numbered
sequentially. When a new Revision is created, all Addenda associated with the previous Revision
of the manual are incorporated into the new Revision of the manual. Each new Revision includes
a revised copy of this print history page.
Revision A (Document Number 2510-902-01) ................................................................ April 2000
Revision B (Document Number 2510-902-01) ................................................................. June 2000
Revision C (Document Number 2510-902-01) ........................................................ December 2000
Revision D (Document Number 2510-902-01) .......................................................... February 2002
All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
Other brand names are trademarks or registered trademarks of their respective holders.
Safety Precautions
The following safety precautions should be observed before using this product and any associated instrumentation. Although
some instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous
conditions may be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions
required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer to the manual for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the manual. The procedures explicitly state
if the operator may perform them. Otherwise, they should be performed only by service personnel.
Service personnel are trained to work on live circuits, and perform safe installations and repairs of products. Only properly
trained service personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that are rated Installation Category I and Installation Category II,
as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and data
I/O signals are Installation Category I and must not be directly connected to mains voltage or to voltage sources with high transient over-voltages. Installation Category II connections require protection for high transient over-voltages often associated with
local AC mains connections. Assume all measurement, control, and data I/O connections are for connection to Category I sources unless otherwise marked or described in the Manual.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fixtures.
The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS,
42.4V peak, or 60VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown
circuit before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock.
If the circuit is capable of operating at or above 1000 volts, no conductive part of the circuit may be exposed.
Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance limited sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit fault current and voltage to the card.
Before operating an instrument, make sure the line cord is connected to a properly grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input power disconnect device must be provided, in close proximity to the equipment and within easy reach of the operator.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting ca2/02
bles or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.
The instrument and accessories must be used in accordance with its specifications and operating instructions or the safety of the
equipment may be impaired.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating information, and as shown on the instrument or test fixture panels, or switching card.
When fuses are used in a product, replace with same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use
of a lid interlock.
If a
The
screw is present, connect it to safety earth ground using the wire recommended in the user documentation.
!
symbol on an instrument indicates that the user should refer to the operating instructions located in the manual.
The
symbol on an instrument shows that it can source or measure 1000 volts or more, including the combined effect of
normal and common mode voltages. Use standard safety precautions to avoid personal contact with these voltages.
The WARNING heading in a manual explains dangers that might result in personal injury or death. Always read the associated
information very carefully before performing the indicated procedure.
The CAUTION heading in a manual explains hazards that could damage the instrument. Such damage may invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits, including the power transformer,
test leads, and input jacks, must be purchased from Keithley Instruments. Standard fuses, with applicable national safety approvals, may be used if the rating and type are the same. Other components that are not safety related may be purchased from
other suppliers as long as they are equivalent to the original component. (Note that selected parts should be purchased only
through Keithley Instruments to maintain accuracy and functionality of the product.) If you are unsure about the applicability
of a replacement component, call a Keithley Instruments office for information.
To clean an instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument only. Do not apply
cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with
no case or chassis (e.g., data acquisition board for installation into a computer) should never require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the factory for
proper cleaning/servicing.
Table of Contents
1
Performance Verification
Introduction ................................................................................ 1-2
Verification test requirements ..................................................... 1-2
Environmental conditions ................................................... 1-2
Warm-up period .................................................................. 1-2
Line power .......................................................................... 1-3
Recommended test equipment ................................................... 1-3
Resistor characterization ..................................................... 1-4
Verification limits ....................................................................... 1-4
Example limits calculation .................................................. 1-4
Resistance limits calculation ............................................... 1-4
Restoring factory defaults .......................................................... 1-5
Performing the verification test procedures ............................... 1-5
Test summary ...................................................................... 1-5
Test considerations .............................................................. 1-6
Adjusting setpoints .............................................................. 1-6
Voltage accuracy ........................................................................ 1-6
Output voltage accuracy ...................................................... 1-6
Voltage readback accuracy .................................................. 1-7
Voltage limit accuracy ......................................................... 1-8
Current accuracy ........................................................................ 1-8
Output current accuracy ...................................................... 1-8
Current readback accuracy .................................................. 1-9
Current limit accuracy ....................................................... 1-10
AC resistance accuracy ............................................................ 1-10
Sensor measurement accuracy ................................................. 1-11
2
Calibration
Introduction ................................................................................
Environmental conditions ..........................................................
Temperature and relative humidity .....................................
Warm-up period ..................................................................
Line power ..........................................................................
Calibration considerations ..........................................................
Calibration cycle .................................................................
Recommended calibration equipment .................................
Resistor characterization .....................................................
Calibration menu ........................................................................
Unlocking calibration .................................................................
Unlocking calibration from the front panel ........................
Unlocking calibration by remote ........................................
2-2
2-2
2-2
2-2
2-2
2-3
2-3
2-3
2-4
2-5
2-5
2-5
2-6
Changing the password ............................................................... 2-6
Changing the password from the front panel ...................... 2-6
Changing the password by remote ...................................... 2-6
Resetting the calibration password ............................................. 2-7
Viewing calibration dates and calibration count ......................... 2-7
Calibration errors ........................................................................ 2-7
Front panel error reporting .................................................. 2-7
Remote error reporting ........................................................ 2-7
Aborting calibration steps ........................................................... 2-8
Front panel calibration ................................................................ 2-8
Remote calibration .................................................................... 2-20
Remote calibration command summary ............................ 2-20
Remote calibration procedure ........................................... 2-21
3
Routine Maintenance
Introduction ................................................................................ 3-2
Line fuse replacement ................................................................. 3-2
4
Troubleshooting
Introduction ................................................................................ 4-2
Safety considerations .................................................................. 4-2
Repair considerations ................................................................. 4-2
Power-on self-test ....................................................................... 4-3
Front panel tests .......................................................................... 4-3
KEYS test ............................................................................ 4-3
DISPLAY PATTERNS test ................................................. 4-4
CHAR SET test ................................................................... 4-4
Principles of operation ................................................................ 4-5
Overall block diagram ......................................................... 4-5
Analog circuits .................................................................... 4-6
Power supply ..................................................................... 4-12
Digital circuitry ................................................................. 4-13
Display board circuits ........................................................ 4-15
Troubleshooting ........................................................................ 4-15
Display board checks ........................................................ 4-15
Power supply checks ......................................................... 4-16
Digital circuitry checks ..................................................... 4-16
Analog circuitry checks ..................................................... 4-17
Internal fuse replacement ......................................................... 4-17
Power supply module fuse replacement ............................ 4-17
Digital I/O +5V supply fuse replacement ......................... 4-18
No comm link error .................................................................. 4-18
5
Disassembly
Introduction ................................................................................
Handling and cleaning ...............................................................
Handling PC boards ............................................................
Solder repairs ......................................................................
Static sensitive devices ...............................................................
Assembly drawings ....................................................................
Case cover removal ....................................................................
Mother board removal ................................................................
Front panel disassembly .............................................................
Removing power components ....................................................
Power supply module removal ............................................
Power module removal .......................................................
Fan removal .........................................................................
Instrument reassembly ...............................................................
6
5-2
5-2
5-2
5-2
5-3
5-3
5-4
5-4
5-5
5-5
5-5
5-6
5-6
5-6
Replaceable Parts
Introduction ................................................................................
Parts lists ....................................................................................
Ordering information .................................................................
Factory service ...........................................................................
Component layouts ....................................................................
A
Specifications
B
Calibration Reference
6-2
6-2
6-2
6-2
6-2
Introduction ............................................................................... B-2
Command summary .................................................................. B-2
Miscellaneous commands ......................................................... B-3
SENSe commands ..................................................................... B-6
SOURce commands .................................................................. B-8
DAC commands ........................................................................ B-9
RESistance commands .............................................................. B-9
Detecting calibration errors ..................................................... B-10
Reading the error queue ................................................... B-10
Error summary ................................................................. B-10
Status byte EAV (Error Available) bit .............................. B-10
Generating an SRQ on error ............................................ B-10
Detecting calibration step completion ..................................... B-12
Using the *OPC? query ................................................... B-12
Using the *OPC command ............................................... B-12
Generating an SRQ on calibration complete ................... B-13
C
Calibration Program
Introduction ...............................................................................
Computer hardware requirements .............................................
Software requirements ...............................................................
Calibration equipment ...............................................................
General program instructions ....................................................
Program C-1 Model 2510 calibration program ..............
C-2
C-2
C-2
C-2
C-3
C-4
List of Illustrations
1
Performance Verification
Figure 1-1
Figure 1-2
Figure 1-3
Figure 1-4
Connections for voltage verification tests .............................. 1-7
Connections for current verification tests .............................. 1-9
Connections for AC resistance verification test ................... 1-11
Connections for sensor resistance accuracy verification ..... 1-12
2
Calibration
Figure 2-1
Figure 2-2
Figure 2-3
Figure 2-4
Figure 2-5
Figure 2-6
Voltage calibration connections ............................................. 2-9
Current and current protection calibration connections ....... 2-11
Thermistor and RTD calibration resistor connections ......... 2-12
Shorted input calibration connections .................................. 2-13
I-SS and V-SS calibration resistor connections ................... 2-17
AC ohms calibration connections ........................................ 2-18
3
Routine Maintenance
Figure 3-1
Rear panel .............................................................................. 3-2
4
Troubleshooting
Figure 4-1
Figure 4-2
Figure 4-3
Figure 4-4
Figure 4-5
Figure 4-6
Figure 4-7
Figure 4-8
Figure 4-9
Figure 4-10
Overall block diagram ........................................................... 4-5
Block diagram of analog circuits ........................................... 4-6
Simplified schematic of class D amplifier ............................. 4-7
Simplified schematic of H-bridge output stage ...................... 4-8
H-bridge switching and step-down regulator ......................... 4-9
Sensor conditioning for 10kΩ thermistor ............................ 4-10
PID hardware control loop ................................................... 4-11
Power supply block diagram ................................................ 4-12
Digital circuitry overall block diagram ................................ 4-13
Digital control circuits ......................................................... 4-14
List of Tables
1
Performance Verification
Table 1-1
Table 1-2
Table 1-3
Recommended verification equipment ................................... 1-3
Characterized resistor values .................................................. 1-4
Sensor resistance measurement accuracy limits ................... 1-13
2
Calibration
Table 2-1
Table 2-2
Table 2-3
Table 2-4
Table 2-5
Table 2-6
Recommended calibration equipment .................................... 2-4
Characterized resistor values .................................................. 2-4
Calibration menu .................................................................... 2-5
Calibration step summary ...................................................... 2-9
Remote calibration command summary ............................... 2-20
Remote calibration step summary ........................................ 2-21
3
Routine Maintenance
Table 3-1
Power line fuse ....................................................................... 3-3
4
Troubleshooting
Table 4-1
Table 4-2
Table 4-3
Table 4-4
Display board checks ........................................................... 4-15
Power supply checks ............................................................ 4-16
Digital circuitry checks ........................................................ 4-16
Analog circuitry checks ........................................................ 4-17
6
Replaceable Parts
Table 6-1
Table 6-2
Table 6-3
Mother board parts list ........................................................... 6-3
Display board parts list ........................................................... 6-9
Miscellaneous parts list ........................................................ 6-10
B
Calibration Reference
Table B-1
Table B-2
Calibration commands .......................................................... B-2
Calibration errors ................................................................ B-11
1
Performance Verification
Models 2510 and 2510-AT
Performance Verification
1-2
Introduction
Use the procedures in this section to verify that Model 2510 accuracy is within the limits
stated in the instrument’s one-year accuracy specifications. You can perform these verification
procedures:
•
•
•
•
When you first receive the instrument to make sure that it was not damaged during
shipment.
To verify that the unit meets factory specifications.
To determine if calibration is required.
Following calibration to make sure it was performed properly.
WARNING
NOTE
The information in this section is intended for qualified service personnel
only. Do not attempt these procedures unless you are qualified to do so.
Some of these procedures may expose you to hazardous voltages, which
could cause personal injury or death if contacted. Use standard safety precautions when working with hazardous voltages.
If the instrument is still under warranty and its performance is outside specified limits, contact your Keithley representative or the factory to determine the correct
course of action.
Verification test requirements
Be sure that you perform the verification tests:
•
•
•
•
•
Under the proper environmental conditions.
After the specified warm-up period.
Using the correct line voltage.
Using the proper test equipment.
Using the specified output signals and reading limits.
Environmental conditions
Conduct your performance verification procedures in a test environment with:
•
•
An ambient temperature of 18-28°C (65-82°F).
A relative humidity of less than 70% unless otherwise noted.
Warm-up period
Allow the Model 2510 to warm up for at least one hour before conducting the verification
procedures.
1-3
Performance Verification
Models 2510 and 2510-AT
If the instrument has been subjected to temperature extremes (those outside the ranges stated
above), allow additional time for the instrument’s internal temperature to stabilize. Typically,
allow one extra hour to stabilize a unit that is 10°C (18°F) outside the specified temperature
range.
Also, allow the test equipment to warm up for the minimum time specified by the
manufacturer.
Line power
The Model 2510 requires a line voltage of 100 to 240V and a line frequency of 50 or 60Hz.
Verification tests must be performed within this range.
Recommended test equipment
Table 1-1 summarizes recommended verification equipment and pertinent specifications.
You can use alternate equipment as long as that equipment has specifications at least as good as
those listed in Table 1-1. Keep in mind, however, that test equipment uncertainty will add to the
uncertainty of each measurement. Generally, test equipment uncertainty should be at least four
times better than corresponding Model 2510 specifications.
Table 1-1
Recommended verification equipment
Description
Manufacturer/Model
Specifications
Digital Multimeter
Keithley 2002
DC Voltage1
20V:
±6.8ppm
Resistance1
20Ω:
200Ω:
2kΩ:
20kΩ
200kΩ:
±23ppm
±19ppm
±7.4ppm
±7.4ppm
±29.8ppm
Resistors2
Isotec RUG-Z-1R00-0.1
INPUT/OUTPUT
Mating Connector3
Keithley CS-846
1Ω, ±0.1%, 100W
100Ω, ±1%
1kΩ, ±1%
10kΩ, ±1%
100kΩ, ±1%
1. Ninety day, full-range accuracy specification of ranges required for various measurement points.
2. Characterize all resistors using 4-wire ohms function of recommended DMM before use.
3. One connector supplied with Model 2510.
Models 2510 and 2510-AT
Performance Verification
1-4
Resistor characterization
The resistors listed in Table 1-1 must be characterized using the 4-wire ohms function of the
recommended DMM before use. Be sure to use the lowest resistance range possible for each
measurement for best accuracy. Characterized values can be recorded in Table 1-2.
Table 1-2
Characterized resistor values
Nominal resistance
Characterized resistance*
1Ω
_________Ω
100Ω
_________Ω
1kΩ
_________kΩ
10kΩ
_________kΩ
100kΩ
_________kΩ
*Characterize value using DMM (see Table 1-1).
Verification limits
The verification limits stated in this section have been calculated using only the Model 2510
one-year accuracy specifications, and they do not include test equipment uncertainty. If a
particular measurement falls outside the allowable range, recalculate new limits based on
Model 2510 specifications and corresponding test equipment specifications.
Example limits calculation
As an example of how verification limits are calculated, assume you are testing the operating
voltage function using a 10V value. Using the Model 2510 operating voltage one-year accuracy
specification of ±(0.1% of reading + 4mV offset), the calculated output limits are:
Limits = 10V ± [(10V × 0.1%) + 4mV]
Limits = 10V ± (0.01 + 0.004)
Limits = 10V ± 0.014V
Limits = 9.986 to 10.014V
Resistance limits calculation
When verifying accuracy for tests using the precision resistors, it will be necessary to recalculate resistance limits based on the actual characterized resistance values. You can calculate
resistance reading limits in the same manner described above, but be sure to use the actual
characterized resistance values and the Model 2510 one-year accuracy specifications for your
calculations (see Appendix A).
1-5
Performance Verification
Models 2510 and 2510-AT
Restoring factory defaults
Before performing the verification procedures, restore the instrument to its factory front
panel (BENCH) defaults as follows:
1.
Press the MENU key. The instrument will display the following prompt:
MAIN MENU
2.
Select SAVESETUP, and then press ENTER. The unit then displays:
SAVESETUP MENU
SAVESETUP COMMUNICATION CAL SAVE RESTORE POWERON RESET
3.
Select RESET, and then press ENTER. The unit displays:
RESET ORIGINAL DFLTS
4.
Select BENCH, and then press ENTER to restore BENCH defaults.
BENCH GPIB
Performing the verification test procedures
Test summary
•
•
•
•
Voltage accuracy
Current accuracy
AC resistance accuracy
Sensor measurement accuracy
If the Model 2510 is not within specifications and not under warranty, see the calibration
procedures in Section 2 for information on calibrating the unit.
Models 2510 and 2510-AT
Performance Verification
1-6
Test considerations
WARNING
The maximum common-mode voltage (voltage between INPUT/OUTPUT
- terminals and chassis ground) is 30V DC. Exceeding this value may
cause a shock hazard.
CAUTION
The maximum voltage between INPUT/OUTPUT sense (S) terminals is
1V. Exceeding this voltage may result in instrument damage.
When performing the verification procedures:
•
•
•
•
•
•
Be sure to restore factory front panel defaults as previously outlined.
Make sure that the test equipment is fully warmed up and properly connected to the
Model 2510 INPUT or OUTPUT terminals as required.
Be sure that the Model 2510 output is turned on before making measurements.
Be sure the test equipment is set up for the proper function and range.
Allow the Model 2510 output signal to settle before making a measurement.
Do not connect test equipment to the Model 2510 through a scanner, multiplexer, or
other switching equipment.
Adjusting setpoints
Before making many verification measurements, you must properly adjust the setpoint as
covered below.
1.
2.
3.
First select the function to be tested as indicated in the procedure.
Press any one of the four EDIT keys (, , , ) to enter the setpoint edit mode.
Using the EDIT keys, adjust the setpoint to the required value.
Voltage accuracy
Output voltage accuracy
Follow the steps below to verify that Model 2510 output voltage accuracy is within specified
limits. This test involves setting the output voltage to a specific value and accurately measuring
the voltage with a DMM.
1.
2.
3.
4.
With the power off, connect the digital multimeter to the Model 2510 OUTPUT terminals, as shown in Figure 1-1.
Turn on the Model 2510 and DMM, and allow them to warm up for at least one hour.
Select the multimeter DC volts measuring function, and choose the 20V range.
Press the Model 2510 V key to select the voltage function, and make sure the source
output is turned on.
1-7
Performance Verification
5.
6.
7.
8.
Models 2510 and 2510-AT
Using the EDIT keys, adjust the Model 2510 voltage setpoint to exactly +9.000V.
Verify that the DMM reading is within 8.987 to 9.013V limits.
Repeat steps 5 and 6 for a -9.000V output value.
Turn off the output when the test is completed.
Figure 1-1
Connections for voltage
verification tests
INPUT S-
INPUT F+
INPUT S+
INPUT FWARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
SENSE
Ω 4 WIRE
INPUT
HI
INPUT HI
1100V
PEAK
!
LO
DCV
ACV
DCI
ACI
Ω2
Ω4
FREQ
NEXT
RANGE
REL
TRIG
STORE RECALL
INFO
LOCAL
CHAN
AUTO
FILTER MATH
CONFIG MENU
F
EXIT
IEEE-488
MADE IN
U.S.A.
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
ENABLE-DIG I/O
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
R
FRONT/REAR
2A 250V
RANGE
POWER
SCAN
500V
PEAK
INPUTS
TEMP
DISPLAY
INPUT
F+ S+ S- F- F+ F- S+ SISOLATION FROM EARTH: 30V MAX.
INPUT LO
2002 MULTIMETER
PREV
OUTPUT
!
CAL
AMPS
!
2.5A, 250V
120
350V
PEAK
CAT I
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
ENTER
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2002 DMM
Model 2510
Voltage readback accuracy
Follow the steps below to verify that Model 2510 voltage readback accuracy is within specified limits. This test involves setting the output voltage to a specific value as measured by a
DMM and verifying that the Model 2510 voltage readback display reading is within limits.
1.
2.
3.
4.
5.
6.
7.
8.
With the power off, connect the digital multimeter to the Model 2510 OUTPUT terminals, as shown in Figure 1-1.
Turn on the Model 2510 and DMM, and allow them to warm up for at least one hour.
Select the multimeter DC volts measuring function, and choose the 20V range.
Press the Model 2510 V key to select the voltage function, and make sure the source
output is turned on.
Using the EDIT keys, adjust the Model 2510 output voltage as measured by the DMM
to +9.000V (or closest possible value).
Verify that the Model 2510 readback display (top display line) is within 8.987 to
9.013V limits.
Repeat steps 5 and 6 for a -9.000V output value.
Turn off the output when the test is completed.
Models 2510 and 2510-AT
Performance Verification
1-8
Voltage limit accuracy
Follow the steps below to verify that Model 2510 voltage limit accuracy is within specified
limits. The test involves setting the voltage limit to a specific value and making sure the output
voltage is limited to the required value.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
With the power off, connect the digital multimeter to the Model 2510 OUTPUT terminals, as shown in Figure 1-1.
Turn on the Model 2510 and the DMM, and allow them to warm up for one hour.
Select the multimeter DC voltage measuring function, and set the unit to the 20V range.
Press the Model 2510 V key to select the voltage function.
Using the EDIT keys, adjust the Model 2510 voltage setpoint to +10.000V.
Press CONFIG then V, select PROTECTION, then set the voltage limit to 9.00V.
Turn the source output on.
Verify that the “VLIM” message is displayed, then note the DMM voltage reading.
Verify that the voltage measured in step 8 is within 8.55 to 9.45V limits.
Turn off the output when the test is completed.
Current accuracy
Output current accuracy
Follow the steps below to verify that Model 2510 output current accuracy is within specified
limits. The test involves setting the output current to a specific value and measuring the current
using a 1Ω resistor and a digital multimeter.
1.
2.
3.
4.
5.
6.
7.
8.
9.
With the power off, connect the digital multimeter and 1Ω resistor to the Model 2510
OUTPUT terminals, as shown in Figure 1-2.
Turn on the Model 2510 and the DMM, and allow them to warm up for one hour.
Select the multimeter DC voltage measuring function, and set the unit to the 20V range.
Press CONFIG then I, choose PROTECTION, then set the current limit to 5.00A.
Press the Model 2510 I key to select the current function, and make sure the source output is turned on.
Using the EDIT keys, adjust the Model 2510 setpoint to exactly +4.5000A. Compute
the current as follows: I = V/R, where V is the DMM voltage reading, and R is the characterized value of the 1Ω resistor.
Verify that the current calculated in step 6 is within 4.474 to 4.526A limits.
Repeat steps 6 and 7 for an output current of -4.5000A.
Turn off the output when the test is completed.
1-9
Performance Verification
Models 2510 and 2510-AT
Figure 1-2
Connections for current
verification tests
1Ω Resistor
OUTPUT S-
OUTPUT F+
OUTPUT F-
OUTPUT S+
Connect sense (S) leads as close as
possible to resistor body.
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
SENSE
Ω 4 WIRE
INPUT
HI
350V
PEAK
INPUT HI
LO
ACV
DCI
ACI
Ω2
Ω4
FREQ
NEXT
REL
TRIG
STORE RECALL
INFO
LOCAL
CHAN
AUTO
FILTER MATH
CONFIG MENU
F
EXIT
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
ENABLE-DIG I/O
TRIGGER
LINK
RS-232
LINE FUSE
SLOWBLOW
R
FRONT/REAR
2A 250V
RANGE
POWER
SCAN
500V
PEAK
INPUTS
TEMP
RANGE
IEEE-488
MADE IN
U.S.A.
ISOLATION FROM EARTH: 30V MAX.
CAL
AMPS
ENTER
!
2.5A, 250V
120
DCV
INPUT
INPUT LO
2002 MULTIMETER
PREV
DISPLAY
!
F+ S+ S- F- F+ F- S+ S-
1100V
PEAK
!
CAT I
OUTPUT
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2002 DMM
Model 2510
Current readback accuracy
Follow the steps below to verify that Model 2510 current readback accuracy is within specified limits. The test involves setting the output current to a specific value using a 1Ω resistor
and a digital multimeter.
1.
2.
3.
4.
5.
6.
7.
8.
With the power off, connect the digital multimeter and 1Ω resistor to the Model 2510
OUTPUT terminals, as shown in Figure 1-2.
Turn on the Model 2510 and the DMM, and allow them to warm up for one hour.
Select the multimeter DC voltage measuring function, and set the unit to the 20V range.
Press CONFIG then I, choose PROTECTION, then set the current limit to 5.00A.
Press the Model 2510 I key to select the current function, and make sure the source output is turned on.
Using the EDIT keys, adjust the Model 2510 output current to +4.5000A, as determined
from the DMM voltage reading and resistor value. Compute the current as follows:
I = V/R, where V is the DMM voltage reading, and R is the characterized value of the
1Ω resistor.
Verify that the current calculated in step 7 is within 4.474 to 4.526A limits.
Repeat steps 6 and 7 for an output current of -4.5000A.
Models 2510 and 2510-AT
Performance Verification
1-10
Current limit accuracy
Follow the steps below to verify that Model 2510 current limit accuracy is within specified
limits. The test involves setting the current limit to a specific value and making sure the current
is limited to the required value.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
With the power off, connect the digital multimeter and 1Ω resistor to the Model 2510
OUTPUT terminals, as shown in Figure 1-2.
Turn on the Model 2510 and the DMM, and allow them to warm up for one hour.
Select the multimeter DC voltage measuring function, and set the unit to the 20V range.
Press the Model 2510 V key to select the voltage function.
Press CONFIG then I, select PROTECTION, then set the current limit to 4.50A.
Make sure the source output is turned on.
Using the EDIT keys, adjust the Model 2510 output voltage to +10.000V.
Verify that the “ILIM” message is displayed, then measure the output current, as
determined from the DMM voltage reading and resistor value. Compute the current as
follows: I = V/R, where V is the DMM voltage reading, and R is the characterized value
of the 1Ω resistor.
Verify that the current calculated in step 9 is within 4.275 to 4.725A limits.
Turn off the output when the test is completed.
AC resistance accuracy
Follow the steps below to verify that Model 2510 AC resistance accuracy is within specified
limits. The test involves connecting a 100Ω resistor to the OUTPUT terminals and verifying
that the Model 2510 AC resistance reading is within limits.
1.
2.
3.
4.
5.
6.
With the power off, connect the 100Ω resistor to the Model 2510 OUTPUT terminals,
as shown in Figure 1-3.
Connect the Model 2510 to the serial port or IEEE-488 interface of the computer.
Turn on the Model 2510, and allow it to warm up for one hour before testing.
Press CONFIG then R.
Select AC-OHMS, then press ENTER.
Note the reading, and verify that the resistance measurement is within required limits.
(Recalculate limits using the characterized resistance value and Model 2510 AC resistance specifications.) For a 100Ω resistance, the limits are: 99.88 to 100.12Ω.
1-11
Performance Verification
Figure 1-3
Connections for
AC resistance
verification test
Models 2510 and 2510-AT
100Ω Resistor
OUTPUT S-
OUTPUT F+
OUTPUT F-
OUTPUT S+
Connect sense (S) leads as close
as possible to resistor body.
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAT I
OUTPUT
!
INPUT
IEEE-488
MADE IN
U.S.A.
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
F+ S+ S- F- F+ F- S+ S-
ENABLE-DIG I/O
ISOLATION FROM EARTH: 30V MAX.
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
2.5A, 250V
120
!
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2510
Sensor measurement accuracy
Use the following steps to verify that Model 2510 temperature sensor measurement accuracy is within specified limits. This procedure involves connecting characterized resistors to the
INPUT terminals and verifying sensor resistance readings are within required limits.
NOTE
The following procedure tests thermistor sensor accuracy and will verify sensor
measurement accuracy for all sensor types.
1.
With the power off, connect the 100Ω characterized resistor to the Model 2510 INPUT
terminals, as shown in Figure 1-4.
Turn on the Model 2510, and allow it to warm up for one hour before testing.
Select the Model 2510 voltage function by pressing the V key.
2.
3.
Models 2510 and 2510-AT
Figure 1-4
Connections for sensor
resistance accuracy
verification
Performance Verification
1-12
100Ω, 1kΩ, 10kΩ,
or 100kΩ Resistor
INPUT S-
INPUT F+
Connect sense (S) leads as close
as possible to resistor body.
INPUT F-
INPUT S+
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAT I
OUTPUT
!
INPUT
IEEE-488
MADE IN
U.S.A.
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
F+ S+ S- F- F+ F- S+ S-
ENABLE-DIG I/O
ISOLATION FROM EARTH: 30V MAX.
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
2.5A, 250V
120
!
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2510
4.
Configure the Model 2510 for thermistor sensor type, resistance range, and 4-wire
sense mode as follows:
• Press CONFIG then T. The instrument will display the following:
CONFIG TEMPERATURE
PROTECTION SENSOR-TYPE UNITS PID
•
Select SENSOR-TYPE, and then press ENTER. The following will be displayed:
SENSOR TYPE
THERMISTOR RTD I-SS V-SS
•
Select THERMISTOR, and then press ENTER. The following will be displayed:
THERMISTOR SETTINGS
•
Select RANGE, then press ENTER. The unit displays:
THERMISTOR RANGE
RANGE A B C I-SRC 100 1K 10K 100K
•
•
5.
6.
Select 100, then press ENTER.
From the THERMISTOR SETTINGS menu, choose SENSE-MODE, then press
ENTER.
• From the SENSE MODE menu, choose 4-WIRE, then press ENTER.
• Press EXIT as required to return to normal display.
Repeatedly press the DISPLAY TOGGLE key until the sensor resistance (RT) is displayed on the lower display line on the right. For example: RT: +099.98Ω.
Verify that the sensor reading for the 100Ω resistance in Table 1-3 is within stated
limits.
1-13
Performance Verification
NOTE
7.
Models 2510 and 2510-AT
The reading limits in Table 1-3 are based on nominal resistance values. Recalculate
new limits based on characterized resistance values and Model 2510 one-year thermistor sensor accuracy specifications (see Appendix A).
Repeat steps 1 through 5 for the remaining resistance values in Table 1-3. Be sure to
select the correct resistance range from the THERMISTOR RANGE menu.
Table 1-3
Sensor resistance measurement accuracy limits
Sensor range
Test resistance1
100Ω
1kΩ
10kΩ
100kΩ
100Ω
1kΩ
10kΩ
100kΩ
Model 2510 sensor reading limits2
(1 year, 18°C-28°C)
99.89 to 100.11Ω
0.9992 to 1.0008kΩ
9.995 to 10.005kΩ
99.939 to 100.061kΩ
1. Nominal resistance values.
2. Reading limits based on Model 2510 1-year accuracy specifications and nominal resistance values. Recalculate reading limits using actual characterized resistance values and Model 2510 1-year accuracy specifications. See “Verification limits” earlier in this section for details.
2
Calibration
2-2
Calibration
Models 2510 and 2510-AT
Introduction
Use the procedures in this section to calibrate the Model 2510. These procedures require
accurate test equipment to measure precise DC voltages and resistances. Calibration can be
performed either from the front panel or by sending SCPI calibration commands over the
IEEE-488 bus or RS-232 port with the aid of a computer.
WARNING
The information in this section is intended for qualified service personnel
only. Do not attempt these procedures unless you are qualified to do so.
Some of these procedures may expose you to hazardous voltages.
Environmental conditions
Temperature and relative humidity
Conduct the calibration procedures at an ambient temperature of 18-28°C (65-82°F) with
relative humidity of less than 70% unless otherwise noted.
Warm-up period
Allow the Model 2510 to warm up for at least one hour before performing calibration.
If the instrument has been subjected to temperature extremes (those outside the ranges stated
above), allow additional time for the instrument’s internal temperature to stabilize. Typically,
allow one extra hour to stabilize a unit that is 10°C (18°F) outside the specified temperature
range.
Allow the test equipment to warm up for the minimum time specified by the manufacturer.
Line power
The Model 2510 requires a line voltage of 100 to 240V at line frequency of 50 or 60Hz. The
instrument must be calibrated while operating from a line voltage within this range.
Models 2510 and 2510-AT
Calibration
2-3
Calibration considerations
WARNING
The maximum common-mode voltage (voltage between INPUT/OUTPUT
- terminals and chassis ground) is 30V DC. Exceeding this value may
cause a shock hazard.
CAUTION
The maximum voltage between INPUT/OUTPUT sense (S) terminals is
1V. Exceeding this voltage may result in instrument damage.
When performing the calibration procedures:
•
•
•
•
Make sure that the test equipment is properly warmed up and connected to the
Model 2510 INPUT or OUTPUT terminals as required.
Always allow the source signal to settle before calibrating each point.
Do not connect test equipment to the Model 2510 through a scanner or other switching
equipment.
If an error occurs during calibration, the Model 2510 will generate an appropriate error
message. See Appendix B for more information.
Calibration cycle
Perform calibration at least once a year to ensure the unit meets or exceeds its specifications.
Recommended calibration equipment
Table 2-1 lists the recommended equipment for the calibration procedures. You can use
alternate equipment as long that equipment has specifications at least as good as those listed in
the table. For optimum calibration accuracy, test equipment specifications should be at least
four times better than corresponding Model 2510 specifications.
2-4
Calibration
Models 2510 and 2510-AT
Table 2-1
Recommended calibration equipment
Description
Manufacturer/Model
Specifications
Digital Multimeter
Keithley 2002
DC Voltage1
20V:
±6.8ppm
Resistance1
20Ω:
200Ω:
2kΩ:
20kΩ
200kΩ:
±23ppm
±19ppm
±7.4ppm
±7.4ppm
±29.8ppm
Resistors2
Isotec RUG-Z-1R00-0.1
INPUT/OUTPUT
Mating Connector3
Keithley CS-846
Clean Copper Wire
1Ω, ±0.1%, 100W
100Ω, ±1%
1kΩ, ±1%
10kΩ, ±1%
100kΩ, ±1%
#18-22 AWG
3. Ninety day, full-range accuracy specification of ranges required for various measurement points.
4. Characterize all resistors using 4-wire ohms function of recommended DMM before use.
5. One connector supplied with Model 2510.
Resistor characterization
The resistors listed in Table 2-1 must be characterized using the 4-wire ohms function of the
recommended DMM before use. Be sure to use the lowest resistance range possible for each
measurement for best accuracy. Record the characterized values in Table 2-2.
Table 2-2
Characterized resistor values
Nominal resistance
Characterized resistance*
1Ω
_________Ω
100Ω
_________Ω
1kΩ
_________kΩ
10kΩ
_________kΩ
100kΩ
_________kΩ
*Characterize value using DMM (see Table 2-1).
Models 2510 and 2510-AT
Calibration
2-5
Calibration menu
Table 2-3 summarizes the main calibration menu selections. To enter the calibration menu,
press the MENU key, select CAL, then press ENTER. Use the EDIT keys to move the cursor
and scroll through menu selections. Press ENTER to select a MENU item.
Table 2-3
Calibration menu
Menu selection
Description
UNLOCK
Unlock calibration using password (default: 002510).
EXECUTE
VOLTAGE
CURRENT
I-PROTECTION
TEMPERATURE
AC-OHMS
V-SOURCE
Execute calibration steps.
Voltage calibration.
Current calibration.
Current protection calibration.
Temperature calibration.
AC resistance calibration.
Voltage source calibration.
VIEW-DATES
View calibration dates.
SAVE
Save calibration constants.
LOCK
Lock out calibration.
CHANGE-PASSWORD
Change calibration password.
Unlocking calibration
Before performing calibration, you must first unlock calibration by entering or sending the
calibration password as explained in the following paragraphs.
Unlocking calibration from the front panel
1.
Press the MENU key, choose CAL, and press ENTER. The instrument will display the
following:
CALIBRATION
UNLOCK EXECUTE VIEW-DATES SAVE LOCK CHANGE-PASSWORD
2.
Select UNLOCK, and then press ENTER. The instrument will display the following:
PASSWORD:
Use , , , , ENTER or EXIT.
3.
4.
Use the and keys to select the letter or number, and use the and arrow keys to
choose the position. (Press for letters; for numbers.) Enter the present password
on the display. (Front panel default: 002510.)
Once the correct password is displayed, press the ENTER key. You can then proceed
with the calibration procedure.
2-6
Calibration
Models 2510 and 2510-AT
Unlocking calibration by remote
To unlock calibration via remote, send the following command:
:CAL:PROT:CODE
'<password>'
For example, the following command uses the default password:
:CAL:PROT:CODE
'KI002510'
Changing the password
The default password (002510) may be changed from the front panel or via remote as
discussed.
Changing the password from the front panel
Follow the steps below to change the password from the front panel:
1.
Press the MENU key, choose CAL, and press ENTER. The instrument will display the
following:
CALIBRATION
UNLOCK EXECUTE VIEW-DATES SAVE LOCK CHANGE-PASSWORD
2.
3.
Select UNLOCK, then enter the password. (Default: 002510.)
Select CHANGE-PASSWORD, and then press ENTER. The instrument will display
the following:
New Pwd: 002510
Use , , , , ENTER or EXIT.
4.
5.
Using the EDIT keys, enter the new password on the display.
Once the desired password is displayed, press the ENTER key to store the new
password.
Changing the password by remote
To change the calibration password by remote, first send the present password, and then
send the new password. For example, the following command sequence changes the password
from the 'KI002510' remote default to 'KI_CAL':
:CAL:PROT:CODE
:CAL:PROT:CODE
'KI002510'
'KI_CAL'
You can use any combination of letters and numbers up to a maximum of eight characters.
NOTE
If you change the first two characters of the password to something other than “KI”,
you will not be able to unlock calibration from the front panel.
Models 2510 and 2510-AT
Calibration
2-7
Resetting the calibration password
If you lose the calibration password, you can unlock calibration by shorting together the
CAL pads, which are located on the display board. Doing so will reset the password to the factory default (002510, front panel; KI002510, remote).
See Section 5 for details on disassembling the unit to access the CAL pads. Refer to the display board component layout drawing at the end of Section 6 for the location of the CAL pads.
Viewing calibration dates and calibration count
When calibration is locked, only the UNLOCK and VIEW-DATES selections will be accessible in the calibration menu. To view calibration dates and calibration count at any time:
1.
From normal display, press MENU, select CAL, then press ENTER. The unit will display the following:
CALIBRATION
UNLOCK EXECUTE VIEW-DATES 2.
Select VIEW-DATES, and then press ENTER. The Model 2510 will display the next
and last calibration dates and the calibration count as in the following example:
NEXT CAL: 02/15/2001
Last calibration: 02/15/2000 Count: 0001
Calibration errors
The Model 2510 checks for errors after each calibration step, minimizing the possibility that
improper calibration may occur due to operator error.
Front panel error reporting
If an error is detected during comprehensive calibration, the instrument will display an
appropriate error message (see Appendix B). The unit will then prompt you to repeat the calibration step that caused the error.
Remote error reporting
You can detect errors while in remote by testing the state of EAV (Error Available) bit (bit 2)
in the status byte. (Use the *STB? query to request the status byte.) Query the instrument for
the type of error by using the :SYST:ERR? query. The Model 2510 will respond with the error
number and a text message describing the nature of the error. See Appendix B for details.
2-8
Calibration
Models 2510 and 2510-AT
Aborting calibration steps
To abort a calibration step from the front panel, press the EXIT key. To abort a calibration
step via remote, send the :ABORt command.
Front panel calibration
The front panel calibration procedure described below calibrates all functions. Note that
each function is separately calibrated, and the procedure must be performed in the order shown.
Step 1: Prepare the Model 2510 for calibration
1.
2.
3.
Turn on the Model 2510 and the digital multimeter, and allow them to warm up for at
least one hour before performing calibration.
Configure the INPUT terminals for 4-wire sensing as follows:
• Press CONFIG then T.
• Select SENSOR-TYPE, then press ENTER.
• Choose THERMISTOR, then press ENTER.
• Select SENSE-MODE, then press ENTER.
• Choose 4-WIRE, then press ENTER.
• Press EXIT as required to back out of the menu structure and return to normal
display.
Press the MENU key, choose CAL, and press ENTER. Select UNLOCK, and then press
ENTER. The instrument will display the following:
PASSWORD:
Use , , , , ENTER or EXIT.
4.
5.
6.
Use the and keys to select the letter or number, and use the and arrow keys to
choose the position. (Press for letters; for numbers.) Enter the present password on
the display. (Front panel default: 002510.)
Press ENTER to complete the process.
Select EXECUTE, then press ENTER to enter the CAL EXECUTE menu. Table 2-4
summarizes the various menu selections and calibration steps, which are covered in
more detail throughout the procedure.
Models 2510 and 2510-AT
Calibration
2-9
Table 2-4
Calibration step summary
Function*
Calibration step
Test connections
VOLTAGE
Output +8.5V
Output 0V
Output -8.5V
DMM to OUTPUT terminals (Figure 2-1)
DMM to OUTPUT terminals (Figure 2-1)
DMM to OUTPUT terminals (Figure 2-1)
CURRENT
1Ω resistor
1Ω resistor to OUTPUT terminals (Figure 2-2)
I-PROTECTION
1Ω resistor
1Ω resistor to OUTPUT terminals (Figure 2-2)
100Ω resistor, short
1kΩ resistor, short
10kΩ resistor, short
100kΩ resistor, short
100Ω resistor, short
1kΩ resistor, short
1kΩ resistor
1kΩ resistor, short
100Ω resistor then short to INPUT terminals (Figure 2-3 and Figure 2-4)
1kΩ resistor then short to INPUT terminals (Figure 2-3 and Figure 2-4)
10kΩ resistor then short to INPUT terminals (Figure 2-3 and Figure 2-4)
100kΩ resistor then short to INPUT terminals (Figure 2-3 and
Figure 2-4)
100Ω resistor then short to INPUT terminals (Figure 2-3 and Figure 2-4)
1kΩ resistor then short to INPUT terminals (Figure 2-3 and Figure 2-4)
DMM and 1kΩ resistor to INPUT terminals (Figure 2-5)
DMM, 1kΩ resistor; short to INPUT terminals (Figure 2-4 and Figure 2-5)
AC-OHMS
100Ω resistor
100Ω resistor to OUTPUT terminals (Figure 2-6)
V-SOURCE
Open leads
None (open OUTPUT terminals)
TEMPERATURE
THERMISTOR
RTD
I-SS
V-SS
* CAL EXECUTE menu selections.
Step 2: Voltage calibration
1.
From the CAL EXECUTE menu, select VOLTAGE, then press ENTER. The instrument
will display the following message:
VOLTAGE CAL
Connect only a DMM to Peltier. Then press ENTER.
2.
Connect the DMM to the Model 2510 OUTPUT terminals, as shown in Figure 2-1.
Figure 2-1
Voltage calibration
connections
OUTPUT F+
OUTPUT S+
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
INPUT HI
INPUT
HI
CAT I
350V
PEAK
1100V
PEAK
!
INPUT LO
LO
PREV
NEXT
DCV
ACV
DCI
ACI
Ω2
Ω4
FREQ
TRIG
STORE RECALL
INFO
LOCAL
CHAN
AUTO
FILTER MATH
RANGE
SCAN
CONFIG MENU
F
OUTPUT S-
R
FRONT/REAR
2A 250V
POWER
EXIT
ENTER
IEEE-488
MADE IN
U.S.A.
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
ENABLE-DIG I/O
500V
PEAK
INPUTS
TEMP
RANGE
REL
INPUT
F+ S+ S- F- F+ F- S+ SISOLATION FROM EARTH: 30V MAX.
2002 MULTIMETER
DISPLAY
OUTPUT
!
CAL
AMPS
RS-232
TRIGGER
LINK
OUTPUT F-
LINE FUSE
SLOWBLOW
!
Model 2002 DMM
2.5A, 250V
120
SENSE
Ω 4 WIRE
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2510
2-10
Calibration
Models 2510 and 2510-AT
3.
4.
Select the DMM DC voltage function, and enable auto-range.
Press ENTER. The unit will then prompt for the +8.5V step:
VOLTAGE CAL
Press ENTER to output +8.5V
NOTE
The output will turn on automatically when you perform the next step.
5.
Press ENTER. The Model 2510 will source +8.5V and simultaneously display the
following:
DMM RDG: +08.50000 V
6.
Note and record the DMM reading, and then use the EDIT keys to adjust the
Model 2510 display to agree exactly with the actual DMM reading.
After adjusting the display to agree with the DMM reading, press ENTER. The instrument will then display the following:
Use , , , , ENTER or EXIT.
7.
VOLTAGE CAL
Press ENTER to output 0.0V
8.
Press ENTER. The Model 2510 will source 0V and at the same time display the
following:
DMM RDG: +00.00000 V
9.
Note and record the DMM reading, and then adjust the Model 2510 display to agree
with that reading.
After adjusting the display value to agree with the DMM reading, press ENTER. The
unit will then display the following:
VOLTAGE CAL
Use , , , , ENTER or EXIT.
10.
Press ENTER to output -8.5V
11.
Press ENTER. The Model 2510 will source -8.5V and display the following:
DMM RDG: -08.50000 V
Use , , , , ENTER or EXIT.
12.
13.
Note and record the DMM reading, adjust the Model 2510 display to agree with the
DMM reading, and press ENTER.
Disconnect the DMM from the OUTPUT terminals.
Models 2510 and 2510-AT
Calibration
2-11
Step 3: Current and current protection calibration
1.
From the CAL EXECUTE menu, select CURRENT, then press ENTER. The instrument will display the following message:
CURRENT CAL
Connect a 1Ω load to Peltier. Then press ENTER.
2.
Figure 2-2
Current and current
protection calibration
connections
Connect the 1Ω resistor to the Model 2510 OUTPUT terminals, as shown in Figure 2-2.
1Ω Resistor
OUTPUT S-
OUTPUT F+
OUTPUT F-
OUTPUT S+
Connect sense (S) leads as close as
possible to resistor body.
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAT I
OUTPUT
!
INPUT
IEEE-488
MADE IN
U.S.A.
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
F+ S+ S- F- F+ F- S+ S-
ENABLE-DIG I/O
ISOLATION FROM EARTH: 30V MAX.
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
2.5A, 250V
120
!
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2510
3.
Press ENTER. The Model 2510 will display the following:
RES VALUE: 1.00000Ω
Use , , , , ENTER or EXIT.
4.
5.
Adjust the Model 2510 display to agree exactly with the characterized value of the 1Ω
resistor, then press ENTER.
Select I-PROTECTION, then press ENTER. The instrument will then display the
following:
CURRENT PROTECTION
Connect 1Ω load to Peltier. Then press ENTER.
6.
7.
With the 1Ω resistor still connected to the OUTPUT terminals, press ENTER. The
Model 2510 will automatically complete the current protection calibration process.
Disconnect the 1Ω resistor from the OUTPUT terminals.
2-12
Calibration
Models 2510 and 2510-AT
Step 4: Temperature calibration
1.
2.
Connect the 100Ω resistor to the Model 2510 INPUT terminals, as shown in Figure 2-3.
From the CAL EXECUTE menu, select TEMPERATURE, then press ENTER. The
instrument will display the following message:
TEMPERATURE CAL
THERMISTOR RTD I-SS V-SS
Figure 2-3
Thermistor and RTD
calibration resistor
connections
100Ω, 1kΩ, 10kΩ,
or 100kΩ Resistor
INPUT S-
INPUT F+
Connect sense (S) leads as close
as possible to resistor body.
INPUT F-
INPUT S+
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAT I
OUTPUT
!
INPUT
IEEE-488
MADE IN
U.S.A.
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
F+ S+ S- F- F+ F- S+ S-
ENABLE-DIG I/O
ISOLATION FROM EARTH: 30V MAX.
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
120
2.5A, 250V
!
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2510
3.
Select THERMISTOR, then press ENTER. The instrument will display the following:
THERMISTOR CAL
100Ω 1kΩ 10kΩ 100kΩ
4.
Select 100Ω, then press ENTER. The unit will display the following:
THERMISTOR CAL
Connect 100Ω to temperature sensor and press ENTER.
5.
Make sure the 100Ω resistor is properly connected, then press ENTER. The
Model 2510 will display the following:
RES VALUE: 0.100000kΩ
6.
Use the EDIT keys to adjust the Model 2510 display to agree exactly with the
characterized 100Ω resistance value, then press ENTER. The unit will display the
following:
THERMISTOR CAL
Use , , , , ENTER or EXIT.
Connect a Short to temperature
sensor and press ENTER.
7.
Short all four INPUT terminals together using clean copper wire, as shown in
Figure 2-4. Allow one minute for thermal equilibrium.
Models 2510 and 2510-AT
Calibration
Figure 2-4
Shorted input
calibration connections
2-13
Short INPUT Terminals
with Clean Copper Wire
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAT I
OUTPUT
!
INPUT
IEEE-488
MADE IN
U.S.A.
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
F+ S+ S- F- F+ F- S+ S-
ENABLE-DIG I/O
ISOLATION FROM EARTH: 30V MAX.
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
2.5A, 250V
120
!
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2510
The characterized 1Ω resistor can be used in place of the shorted INPUT terminals,
if desired. Enter the characterized value of the 1Ω resistor at the RES VALUE
prompt.
NOTE
8.
Press ENTER. The Model 2510 will display the following:
RES VALUE: 00.00000Ω
Use , , , , ENTER or EXIT.
9.
10.
Press ENTER to complete the shorted calibration step, then remove the shorting wires
from the INPUT terminals.
From the THERMISTOR CAL menu, select 1kΩ, then press ENTER. The unit will display the following:
THERMISTOR CAL
Connect 1kΩ to temperature sensor and press ENTER.
11.
12.
Connect the 1kΩ resistor to the Model 2510 INPUT terminals (see Figure 2-3).
Press ENTER. The Model 2510 will display the following:
RES VALUE: 01.00000kΩ
Use , , , , ENTER or EXIT.
13.
Use the EDIT keys to adjust the Model 2510 display to agree exactly with the characterized 1kΩ resistance value, then press ENTER. The unit will display the following:
THERMISTOR CAL
Connect a Short to temperature
sensor and press ENTER.
14.
15.
Short all four INPUT terminals together using clean copper wire (see Figure 2-4).
Allow one minute for thermal equilibrium.
Press ENTER. The Model 2510 will display the following:
RES VALUE: 00.00000Ω
Use , , , , ENTER or EXIT.
16.
Press ENTER to complete the shorted calibration step, then remove the shorting wires
from the INPUT terminals.
2-14
Calibration
17.
Models 2510 and 2510-AT
From the THERMISTOR CAL menu, select 10kΩ, then press ENTER. The unit will
display the following:
THERMISTOR CAL
Connect 10kΩ to temperature sensor and press ENTER.
18.
19.
Connect the 10kΩ resistor to the Model 2510 INPUT terminals (Figure 2-3).
Press ENTER. The Model 2510 will display the following:
RES VALUE: 010.0000kΩ
Use , , , , ENTER or EXIT.
20.
Use the EDIT keys to adjust the Model 2510 display to agree exactly with the characterized 10kΩ resistance value, then press ENTER. The unit will display the following:
THERMISTOR CAL
Connect a Short to temperature
sensor and press ENTER.
21.
22.
Short all four INPUT terminals together using clean copper wire (see Figure 2-4).
Allow one minute for thermal equilibrium.
Press ENTER. The Model 2510 will display the following:
RES VALUE: 00.00000Ω
Use , , , , ENTER or EXIT.
23.
24.
Press ENTER to complete the shorted calibration step, then remove the shorting wires
from the INPUT terminals.
From the THERMISTOR CAL menu, select 100kΩ, then press ENTER. The unit will
display the following:
THERMISTOR CAL
Connect 100kΩ to temperature sensor and press ENTER.
25.
26.
Connect the 100kΩ resistor to the Model 2510 INPUT terminals (Figure 2-3).
Press ENTER. The Model 2510 will display the following:
RES VALUE: 0100.000kΩ
Use , , , , ENTER or EXIT.
27.
Use the EDIT keys to adjust the Model 2510 display to agree exactly with the characterized 100kΩ resistance value, then press ENTER. The unit will display the following:
THERMISTOR CAL
Connect a Short to temperature
sensor and press ENTER.
28.
29.
Short all four INPUT terminals together using clean copper wire (see Figure 2-4).
Allow one minute for thermal equilibrium.
Press ENTER. The Model 2510 will display the following:
RES VALUE: 00.00000Ω
Use , , , , ENTER or EXIT.
Models 2510 and 2510-AT
Calibration
2-15
30.
Press ENTER to complete the shorted calibration step, then remove the shorting wires
from the INPUT terminals.
31.
Press EXIT to return to the TEMPERATURE CAL menu.
32.
Select RTD, then press ENTER. The unit displays the following:
RTD CAL
Connect 100Ω to temperature sensor and press ENTER.
33.
Connect the 100Ω resistor to the Model 2510 INPUT terminals (Figure 2-3).
34.
Press ENTER. The Model 2510 will display the following:
RES VALUE: 0.100000kΩ
Use , , , , ENTER or EXIT.
35.
Adjust the display to agree with the value of the 100Ω resistor, then press ENTER. The
unit will display the following:
RTD CAL
Connect a Short to temperature
sensor and press ENTER.
36.
Short all four INPUT terminals together using clean copper wire (see Figure 2-4).
Allow one minute for thermal equilibrium.
37.
Press ENTER. The Model 2510 will display the following:
RES VALUE: 00.00000Ω
Use , , , , ENTER or EXIT.
38.
Press ENTER to complete the shorted calibration step, then remove the shorting wires
from the INPUT terminals.
39.
Connect the 1kΩ resistor to the Model 2510 INPUT terminals (Figure 2-3).
40.
Press ENTER. The Model 2510 will display the following:
RES VALUE: 01.00000kΩ
Use , , , , ENTER or EXIT.
41.
Adjust the display to agree with the value of the 1kΩ resistor, then press ENTER. The
unit will display the following:
RTD CAL
Connect a Short to temperature
sensor and press ENTER.
42.
Short all four INPUT terminals together using clean copper wire (see Figure 2-4).
Allow one minute for thermal equilibrium.
43.
Press ENTER. The Model 2510 will display the following:
RES VALUE: 00.00000Ω
Use , , , , ENTER or EXIT.
2-16
Calibration
Models 2510 and 2510-AT
44.
Press ENTER to complete the shorted calibration step, then remove the shorting wires
from the INPUT terminals.
45.
From the TEMPERATURE CAL menu, select I-SS, then press ENTER. The unit displays the following:
I-SS CAL
Connect 1kΩ to temperature sensor and press ENTER.
46.
Connect the DMM and 1kΩ resistor to the Model 2510 (Figure 2-5). Press ENTER.
The Model 2510 will display the following:
RES VALUE: 01.00000kΩ
Use , , , , ENTER or EXIT.
47.
Use the EDIT keys to adjust the Model 2510 display to agree exactly with the characterized 1kΩ resistance value, then press ENTER. The unit will prompt for the DMM
voltage reading:
DMM RDG: +0.833330 V
Use , , , , ENTER or EXIT.
48.
Note the DMM reading, then adjust the Model 2510 display to agree with that value.
Press ENTER.
49.
From the TEMPERATURE CAL menu, select V-SS, then press ENTER. The unit displays the following:
V-SS CAL
Connect 1kΩ to temperature sensor and press ENTER.
50.
Make sure the 1kΩ resistor and the DMM are still connected to the Model 2510 INPUT
terminals (Figure 2-5).
51.
Press ENTER. The Model 2510 will display the following:
DMM RDG: +2.500000V
Use , , , , ENTER or EXIT.
52.
Note the DMM reading, use the EDIT keys to adjust the Model 2510 display to agree
exactly with that value, then press ENTER. The unit will display the following:
V-SS CAL
Connect a Short to temperature
sensor and press ENTER.
53.
Short all four INPUT terminals together using clean copper wire (see Figure 2-4).
Allow one minute for thermal equilibrium.
54.
Press ENTER. The Model 2510 will display the following:
DMM RDG: +0.000000V
Use , , , , ENTER or EXIT.
Models 2510 and 2510-AT
Calibration
55.
Press ENTER to complete the shorted calibration step, then remove the shorting wires
from the INPUT terminals.
56.
Press EXIT to return to the CAL EXECUTE menu.
Figure 2-5
I-SS and V-SS calibration
resistor connections
1kΩ Resistor
INPUT S-
INPUT F+
INPUT S+
Connect sense (S)
leads as close
as possible to
resistor body.
INPUT FWARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
SENSE
Ω 4 WIRE
INPUT
HI
INPUT HI
1100V
PEAK
!
LO
ACV
DCI
ACI
Ω2
Ω4
FREQ
NEXT
REL
TRIG
STORE RECALL
INFO
LOCAL
CHAN
AUTO
FILTER MATH
CONFIG MENU
F
EXIT
INPUT
IEEE-488
MADE IN
U.S.A.
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
F+ S+ S- F- F+ F- S+ S-
ENABLE-DIG I/O
ISOLATION FROM EARTH: 30V MAX.
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
R
FRONT/REAR
2A 250V
RANGE
POWER
SCAN
500V
PEAK
INPUTS
TEMP
RANGE
OUTPUT
!
INPUT LO
2002 MULTIMETER
DCV
DISPLAY
CAT I
CAL
AMPS
!
2.5A, 250V
120
350V
PEAK
PREV
2-17
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
ENTER
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2002 DMM
Model 2510
2-18
Calibration
Models 2510 and 2510-AT
Step 5: AC ohms calibration
1.
From the CAL EXECUTE menu, select AC-OHMS, then press ENTER. The instrument will display the following message:
AC-OHMS CAL
Connect a 100Ω load to Peltier. Then press ENTER.
2.
3.
Connect the 100Ω resistor to the OUTPUT terminals (see Figure 2-6).
Press ENTER. The instrument will display the following:
RES VALUE: 0.100000kΩ
4.
Use the EDIT keys to adjust the Model 2510 display to agree exactly with the characterized 100Ω resistance value, then press ENTER.
Use , , , , ENTER or EXIT.
Figure 2-6
AC ohms calibration
connections
100Ω Resistor
OUTPUT F+
OUTPUT S-
OUTPUT S+
OUTPUT F-
Connect sense (S) leads as close
as possible to resistor body.
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAT I
OUTPUT
!
IEEE-488
MADE IN
U.S.A.
INPUT
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
F+ S+ S- F- F+ F- S+ S-
ENABLE-DIG I/O
ISOLATION FROM EARTH: 30V MAX.
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
2.5A, 250V
120
!
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Model 2510
Step 6: Voltage source calibration
1.
From the CAL EXECUTE menu, select V-SOURCE, then press ENTER. The instrument will display the following message:
V-SRC CAL
Open Peltier leads then press
ENTER.
2.
3.
4.
Disconnect all resistors and test leads from the Model 2510 OUTPUT terminals.
Press ENTER to complete voltage source calibration.
Press EXIT to return to the CALIBRATION menu.
Models 2510 and 2510-AT
Calibration
2-19
Step 7: Enter calibration dates and save calibration
NOTE
1.
For temporary calibration without saving new calibration constants, proceed to
Step 8: Lock out calibration.
From the CALIBRATION menu, select SAVE, then press ENTER. The unit will
prompt you for the calibration date:
CAL DATE: 02/15/2000
Use , , , , ENTER or EXIT.
2.
3.
Using the EDIT keys, change the displayed date to today's date, then press the ENTER
key. Press ENTER again to confirm the date.
The unit will then prompt for the calibration due date:
NEXT CAL: 02/15/2001
Use , , , , ENTER or EXIT.
4.
5.
Set the calibration due date to the desired value, then press ENTER. Press ENTER
again to confirm the date.
Once the calibration dates are entered, calibration is complete, and the following message will be displayed:
CALIBRATION COMPLETE
Press ENTER to save; EXIT to abort
6.
Press ENTER to save the calibration data (or press EXIT to abort without saving calibration data).
Step 8: Lock out calibration
From the CAL EXECUTE menu, select LOCK, then press ENTER to lock out calibration.
Press EXIT to return to normal display.
2-20
Calibration
Models 2510 and 2510-AT
Remote calibration
Use the following procedure to perform remote calibration by sending SCPI commands over
the IEEE-488 bus or RS-232 port. The remote commands and appropriate parameters are separately summarized for each step.
Remote calibration command summary
Table 2-5 summarizes remote calibration commands used in this section.
NOTE
For a detailed description of all calibration commands and queries, refer to
Appendix B.
Table 2-5
Remote calibration command summary
Command
Description
:CALibration
:PROTected
:CODE '<password>'
:SENSe
:VOLTage <NRf>
:CURRent <NRf>
:TEMPerature <NRf>
:SOURce <NRf>
:AUTO
:IPDac
:RESistance
[:AC] <NRf>
:DATE <y>,<m>,<d>
:NDUE <y>,<m>,<d>
:SAVE
:LOCK
Calibration subsystem.
Calibration commands protected by code/password.
Unlock calibration. (Default code/password: KI002510.)
Calibrate Peltier voltage measurement.
Calibrate current measurement.
Calibrate temperature measurement,
Calibrate Peltier source/sense voltage.
Calibrate voltage source.
Calibrate current protection DAC.
Calibrate AC ohms.
Program calibration year, month, day.
Program calibration due year, month, day.
Save calibration data in EEPROM.
Lock out calibration.
Models 2510 and 2510-AT
Calibration
2-21
Remote calibration procedure
Step 1: Prepare the Model 2510 for calibration
1.
2.
3.
4.
5.
With the power off, connect the Model 2510 to the controller IEEE-488 interface or
RS-232 port using a shielded interface cable.
Turn on the Model 2510 and the test equipment, and allow them to warm up for at least
one hour before performing calibration.
If you are using the IEEE-488 interface, make sure the primary address of the
Model 2510 is the same as the address specified in the program you will be using to
send commands. (Use the MENU key and the COMMUNICATION menu to access the
IEEE-488 address.)
Send the following command to unlock calibration:
:CAL:PROT:CODE ‘KI002510’
Table 2-6 summarizes the various calibration steps and associated commands, which
are covered in more detail throughout the procedure.
Table 2-6
Remote calibration step summary
Calibrated function
Calibration command
Voltage
:OUTP ON
:SOUR:VOLT 8.5
:CAL:PROT:SENS:VOLT <DMM_Reading>
:CAL:PROT:SOUR <DMM_Reading>
:SOUR:VOLT 0
:CAL:PROT:SENS:VOLT <DMM_Reading>
:CAL:PROT:SOUR <DMM_Reading>
:SOUR:VOLT -8.5
:CAL:PROT:SENS :VOLT <DMM_Reading>
:CAL:PROT:SOUR <DMM_Reading>
:OUTP OFF
Current
Current protection
:OUTP ON
:CAL:PROT:SENS:CURR <Resistance_Value>
:CAL:PROT:IPD
:OUTP OFF
Test connections
DMM to OUTPUT (Figure 2-1)
DMM to OUTPUT (Figure 2-1)
DMM to OUTPUT (Figure 2-1)
DMM to OUTPUT (Figure 2-1)
DMM to OUTPUT (Figure 2-1)
DMM to OUTPUT (Figure 2-1)
1Ω to OUTPUT (Figure 2-2)
1Ω to OUTPUT (Figure 2-2)
2-22
Calibration
Models 2510 and 2510-AT
Table 2-6 (cont.)
Remote calibration step summary
Calibrated function
Calibration command
Temperature
Thermistor
sensor
:SYST:RSEN ON
:SENS:TEMP:TRAN THER
:SENS:TEMP:THER:RANG 100
:CAL:PROT:TEMP <Resistance_Value>
:CAL:PROT:TEMP 0
:SENS:TEMP:THER:RANG 1e3
:CAL:PROT:TEMP <Resistance_Value>
:CAL:PROT:TEMP 0
:SENS:TEMP:THER:RANG 1e4
:CAL:PROT:TEMP <Resistance_Value>
:CAL:PROT:TEMP 0
:SENS:TEMP:THER:RANG 1e5
:CAL:PROT:TEMP <Resistance_Value>
:CAL:PROT:TEMP 0
:SENS:TEMP:TRAN RTD
:SENS:TEMP:RTD:RANG 100
:CAL:PROT:TEMP <Resistance_Value>
:CAL:PROT:TEMP 0
:SENS:TEMP:RTD:RANG 1000
:CAL:PROT:TEMP<Resistance_Value>
:CAL:PROT:TEMP 0
:SENS:TEMP:TRAN ISS
:CAL:PROT:TEMP <Resistance_Value>
:CAL:PROT:TEMP <DMM_Reading>
:SENS:TEMP:TRAN VSS
:CAL:PROT:TEMP <DMM_Reading>
:CAL:PROT:TEMP 0
RTD sensor
Current sensor
Voltage sensor
Test connections
100Ω to INPUT (Figure 2-3)
Short to INPUT (Figure 2-4)
1kΩ to INPUT (Figure 2-3)
Short to INPUT (Figure 2-4)
10kΩ to INPUT (Figure 2-3)
Short to INPUT (Figure 2-4)
100kΩ to INPUT (Figure 2-3)
Short to INPUT (Figure 2-4)
100Ω to INPUT (Figure 2-3)
Short to INPUT (Figure 2-4)
1000Ω to INPUT (Figure 2-3)
Short to INPUT (Figure 2-4)
1kΩ/DMM to INPUT (Figure 2-5)
1kΩ/DMM to INPUT (Figure 2-5)
Short to INPUT (Figure 2-4)
AC ohms
:CAL:PROT:RES <Resistance_Value>
100Ω to OUTPUT (Figure 2-6)
Voltage source
:OUTP ON
:CAL:PROT:SOUR:AUTO
:OUTP OFF
None (open OUTPUT)
Models 2510 and 2510-AT
Calibration
2-23
Step 2: Voltage calibration
1.
2.
3.
Connect the DMM to the Model 2510 OUTPUT terminals, as shown in Figure 2-1.
Select the DMM DC voltage function, and enable auto-range.
Send this command to turn on the output:
:OUTP ON
4.
Send the following command to output +8.5V:
:SOUR:VOLT 8.5
5.
Note and record the DMM reading, and then send that value as the parameter for the
following commands:
:CAL:PROT:SENS:VOLT <DMM_Reading>
:CAL:PROT:SOUR <DMM_Reading>
For example, if the DMM reading is 8.51V, the correct commands are:
:CAL:PROT:SENS:VOLT 8.51
:CAL:PROT:SOUR 8.51
6.
Send the following command to output 0V:
:SOUR:VOLT 0
7.
Note and record the DMM reading, then send that value as the parameter for the following commands:
:CAL:PROT:SENS:VOLT <DMM_Reading>
:CAL:PROT:SOUR <DMM_Reading>
8.
Send the following command to output -8.5V:
:SOUR:VOLT -8.5
9.
Note and record the DMM reading, then send that value as the parameter for the following commands:
:CAL:PROT:SENS:VOLT <DMM_Reading>
:CAL:PROT:SOUR <DMM_Reading>
10.
Send this command to turn off the output:
:OUTP OFF
11.
Disconnect the DMM from the OUTPUT terminals.
Step 3: Current and current protection calibration
1.
2.
Connect the 1Ω resistor to the Model 2510 OUTPUT terminals, as shown in Figure 2-2.
Send this command to turn on the output:
:OUTP ON
3.
Send the following command with the characterized 1Ω resistor value as the command
parameter:
:CAL:PROT:SENS:CURR <Resistance_Value>
For example, if the actual resistor value is 1.01Ω, the correct command is:
:CAL:PROT:SENS:CURR 1.01
2-24
Calibration
Models 2510 and 2510-AT
4.
With the 1Ω resistor still connected, send the following command to calibrate the current protection DAC:
:CAL:PROT:IPD
5.
Send this command to turn off the output:
:OUTP OFF
6.
Disconnect the 1Ω resistor from the OUTPUT terminals.
Step 4: Temperature calibration
1.
2.
Connect the 100Ω resistor to the Model 2510 INPUT terminals, as shown in Figure 2-3.
Send the following command to select the thermistor type temperature sensor:
:SENS:TEMP:TRAN THER
3.
Send the following command to enable 4-wire sensing:
:SYST:RSEN ON
4.
Send this command to select the 100Ω resistance range:
:SENS:TEMP:THER:RANG 100
5.
Send the following command with the characterized 100Ω resistance value as the
parameter to calibrate the 100Ω range:
:CAL:PROT:SENS:TEMP <Resistance_Value>
6.
Short the INPUT terminals with clean copper wire (Figure 2-4). Allow one minute for
thermal equilibrium, then send this command:
:CAL:PROT:SENS:TEMP 0
7.
8.
Connect the 1kΩ resistor to the Model 2510 INPUT terminals (Figure 2-3).
Send this command to select the 1kΩ resistance range:
:SENS:TEMP:THER:RANG 1e3
9.
Send the following command with the characterized 1kΩ resistance value as the parameter to calibrate the 1kΩ range:
:CAL:PROT:SENS:TEMP <Resistance_Value>
10.
Short the INPUT terminals with clean copper wire (Figure 2-4). Allow one minute for
thermal equilibrium, then send this command:
:CAL:PROT:SENS:TEMP 0
11.
12.
Connect the 10kΩ resistor to the Model 2510 INPUT terminals (Figure 2-3).
Send this command to select the 10kΩ resistance range:
:SENS:TEMP:THER:RANG 1e4
13.
Send the following command with the characterized 10kΩ resistance value as the
parameter to calibrate the 10kΩ range:
:CAL:PROT:SENS:TEMP <Resistance_Value>
14.
Short the INPUT terminals with clean copper wire (Figure 2-4). Allow one minute for
thermal equilibrium, then send this command:
:CAL:PROT:SENS:TEMP 0
15.
Connect the 100kΩ resistor to the Model 2510 INPUT terminals (Figure 2-3).
Models 2510 and 2510-AT
Calibration
2-25
16.
Send this command to select the 100kΩ resistance range:
:SENS:TEMP:THER:RANG 1e5
17.
Send the following command with the characterized 100kΩ resistance value as the
parameter to calibrate the 100kΩ range:
:CAL:PROT:SENS:TEMP <Resistance_Value>
18.
Short the INPUT terminals with clean copper wire (Figure 2-4). Allow one minute for
thermal equilibrium, then send this command:
:CAL:PROT:SENS:TEMP 0
19.
20.
Connect the 100Ω resistor to the INPUT terminals (Figure 2-3).
Send the following command to select the RTD type temperature sensor:
:SENS:TEMP:TRAN RTD
21.
Send this command to select the 100Ω range:
:SENS:TEMP:RTD 100
Send the following command with the characterized 100Ω resistance value as the
parameter to calibrate the RTD measurement function:
:CAL:PROT:SENS:TEMP <Resistance_Value>
22.
23.
Short the INPUT terminals with clean copper wire (Figure 2-4). Allow one minute for
thermal equilibrium, then send this command:
:CAL:PROT:SENS:TEMP 0
24.
25.
Connect the 1000Ω resistor to the INPUT terminals (Figure 2-5).
Send this command to select the 1000Ω range:
:SENS:TEMP:RTD:RANG 1000
Send the following command with the characterized 1000Ω resistance value as the
parameter to calibrate the RTD measurement function:
:CAL:PROT:SENS:TEMP <Resistance_Value>
Short the INPUT terminals with clean copper wire (Figure 2-4). Allow one minute for
thermal equilibrium, then send this command:
:CAL:PROT:SENS:TEMP 0
Connect the DMM and the 1kΩ resistor to the INPUT terminals (Figure 2-5).
Send the following command to select a solid-state, current-type temperature sensor:
:SENS:TEMP:TRAN ISS
26.
27.
28.
29.
30.
Send the following command with the characterized 1kΩ resistance value as the
parameter:
:CAL:PROT:SENS:TEMP <Resistance_Value>
31.
Note the DMM reading, then send that value as the parameter for the following
command:
:CAL:PROT:SENS:TEMP <DMM_Reading>
32.
Make sure the 1kΩ resistor and DMM are still connected to the Model 2510 INPUT
terminals (Figure 2-5).
Send the following command to select a solid-state, voltage-type temperature sensor:
:SENS:TEMP:TRAN VSS
33.
2-26
Calibration
Models 2510 and 2510-AT
34.
Note the DMM reading, then send the following command with the DMM reading
value as the parameter to calibrate the current type solid-state sensor:
:CAL:PROT:SENS:TEMP <DMM_Reading>
35.
Short the INPUT terminals with clean copper wire (Figure 2-4). Allow one minute for
thermal equilibrium, then send this command:
:CAL:PROT:SENS:TEMP 0
Step 5: AC ohms calibration
1.
2.
Connect the 100Ω resistor to the OUTPUT terminals (see Figure 2-6). Note that the
output will be turned off for the AC ohms calibration step.
Send the following command with the characterized 100Ω resistance value as the command parameter to calibrate the AC ohms function:
:CAL:PROT:RES <Resistance_Value>
Step 6: Voltage source calibration
1.
2.
Disconnect all resistors and test leads from the Model 2510 OUTPUT terminals.
Turn on the output by sending:
:OUTP ON
3.
Send this command to complete voltage source calibration:
:CAL:PROT:SOUR:AUTO
4.
Turn off the output by sending:
:OUTP OFF
Step 7: Program calibration dates
Use following commands to set the calibration date and calibration due date:
:CAL:PROT:DATE
:CAL:PROT:NDUE
<yyyy>, <mm>, <dd>
<yyyy>, <mm>, <dd>
(Calibration date)
(Next calibration due date)
Note that the year, month, and date must be separated by commas.
Step 8: Save calibration constants
Calibration is now complete, so you can store the calibration constants in EEROM by sending the following command:
:CAL:PROT:SAVE
NOTE
Calibration will be temporary unless you send the SAVE command.
Step 9: Lock out calibration
To lock out further calibration, send the following command after completing the calibration
procedure:
:CAL:PROT:LOCK
3
Routine Maintenance
3-2
Routine Maintenance
Models 2510 and 2510-AT
Introduction
The information in this section deals with routine type maintenance that can be performed
by the operator.
Line fuse replacement
WARNING
Disconnect the line cord at the rear panel, and remove all test leads connected to the instrument (front and rear) before replacing the line fuse.
The power line fuse is accessible from the rear panel and is integral with the AC power
module (see Figure 3-1).
Figure 3-1
Rear panel
Model 2510
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAT I
OUTPUT
!
INPUT
IEEE-488
MADE IN
U.S.A.
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
F+ S+ S- F- F+ F- S+ S-
ENABLE-DIG I/O
ISOLATION FROM EARTH: 30V MAX.
RS-232
TRIGGER
LINK
LINE FUSE
SLOWBLOW
2.5A, 250V
120
!
LINE RATING
100-240VAC
50, 60 HZ
90VA MAX
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Line Fuse
Models 2510 and 2510-AT
Routine Maintenance
3-3
Perform the following steps to replace the line fuse:
1.
2.
Using a small flat-blade screwdriver, carefully release the locking tab that secures the
fuse carrier to the power module.
Pull out the fuse carrier, and replace the fuse with the type specified in Table 3-1.
CAUTION
3.
NOTE
To prevent instrument damage, use only the fuse type specified in
Table 3-1.
Reinstall the fuse carrier, pushing it in firmly until it locks into place.
If the power line fuse continues to blow, a circuit malfunction exists and must be
corrected. Refer to the troubleshooting information in Section 4 of this manual for
additional information.
Table 3-1
Power line fuse
Line voltage
Rating
Keithley part no.
100-240V
250V, 2.5A, Slow
Blow 5 × 20mm
FU-106-2.5
4
Troubleshooting
4-2
Troubleshooting
Models 2510 and 2510-AT
Introduction
This section of the manual will assist you in troubleshooting and repairing the Model 2510.
Included are self-tests, test procedures, troubleshooting tables, and circuit descriptions. Note
that disassembly instructions are located in Section 5, and component layout drawings are at
the end of Section 6.
Safety considerations
WARNING
The information in this section is intended for qualified service personnel
only. Do not perform these procedures unless you are qualified to do so.
Some of these procedures may expose you to hazardous voltages that could
cause personal injury or death. Use caution when working with hazardous
voltages.
Repair considerations
Before making any repairs to the Model 2510, be sure to read the following considerations.
CAUTION
•
•
•
•
•
The PC boards are built using surface mount techniques and require specialized equipment and skills for repair. If you are not equipped and/or
qualified, it is strongly recommended that you send the unit back to the
factory for repairs or limit repairs to the PC board replacement level.
Without proper equipment and training, you could damage a PC board
beyond repair.
Repairs will require various degrees of disassembly; however, it is recommended that
the Front Panel Tests be performed prior to any disassembly. The disassembly instructions for the Model 2510 are contained in Section 5 of this manual.
Do not make repairs to surface mount PC boards unless equipped and qualified to do so
(see previous CAUTION).
When working inside the unit and replacing parts, be sure to adhere to the handling precautions and cleaning procedures explained in Section 5.
Many CMOS devices are installed in the Model 2510. These static-sensitive devices
require special handling as explained in Section 5.
Whenever a circuit board is removed or a component is replaced, the Model 2510 must
be recalibrated. See Section 2 for details on calibrating the unit.
Models 2510 and 2510-AT
Troubleshooting
4-3
Power-on self-test
During the power-on sequence, the Model 2510 will perform a checksum test on its EPROM
and test its RAM. If one of these tests fails, the instrument will lock up.
Front panel tests
There are three front panel tests: one to test the functionality of the front panel keys and two
to test the display. In the event of a test failure, refer to Display board checks for details on troubleshooting the display board.
KEYS test
The KEYS test lets you check the functionality of each front panel key. Perform the following steps to run the KEYS test.
1.
2.
3.
Display the MAIN MENU by pressing the MENU key.
Using the EDIT keys, select TEST, and press ENTER to display the SELF-TEST
MENU.
Select DISPLAY-TESTS, and press ENTER to display the following menu:
FRONT PANEL TESTS
KEYS DISPLAY-PATTERNS CHAR-SET
4.
5.
Select KEYS, and press ENTER to start the test. When a key is pressed, the label name
for that key will be displayed to indicate that it is functioning properly. When the key is
released, the message “No keys pressed” is displayed.
Pressing EXIT tests the EXIT key. However, the second consecutive press of EXIT
aborts the test and returns the instrument to the SELF-TEST MENU. Continue pressing
EXIT to back out of the menu structure.
4-4
Troubleshooting
Models 2510 and 2510-AT
DISPLAY PATTERNS test
The display test lets you verify that each pixel and annunciator in the vacuum fluorescent
display is working properly. Perform the following steps to run the display test:
1.
2.
3.
Display the MAIN MENU by pressing the MENU key.
Select TEST, and press ENTER to display the SELF-TEST MENU.
Select DISPLAY-TESTS, and press ENTER to display the following menu:
FRONT PANEL TESTS
4.
Select DISPLAY-PATTERNS, and press ENTER to start the display test. There are five
parts to the display test. Each time a front panel key (except EXIT) is pressed, the next
part of the test sequence is selected. The five parts of the test sequence are as follows:
• Checkerboard pattern (alternate pixels on) and all annunciators.
• Checkerboard pattern and the annunciators that are on during normal operation.
• Horizontal lines (pixels) of the first digit are sequenced.
• Vertical lines (pixels) of the first digit are sequenced.
• Each digit (and adjacent annunciator) is sequenced. All the pixels of the selected
digit are on.
When finished, abort the display test by pressing EXIT. The instrument returns to the
FRONT PANEL TESTS MENU. Continue pressing EXIT to back out of the menu
structure.
KEYS DISPLAY-PATTERNS CHAR-SET
5.
CHAR SET test
The character set test lets you display all characters. Perform the following steps to run the
character set test:
1.
2.
3.
Display the MAIN MENU by pressing the MENU key.
Select TEST, and press ENTER to display the SELF-TEST MENU.
Select DISPLAY-TESTS, and press ENTER to display the following menu:
FRONT PANEL TESTS
4.
Select CHAR-SET, and press ENTER to start the character set test. Press any key
except EXIT to cycle through all displayable characters.
When finished, abort the character set test by pressing EXIT. The instrument returns to
the FRONT PANEL TESTS MENU. Continue pressing EXIT to back out of the menu
structure.
KEYS DISPLAY-PATTERNS CHAR-SET
5.
Models 2510 and 2510-AT
Troubleshooting
4-5
Principles of operation
The following information is provided to support the troubleshooting tests and procedures
covered in this section of the manual.
Overall block diagram
Figure 4-1 shows an overall block diagram of the Model 2510. Circuitry may be divided into
three general areas:
•
•
•
Figure 4-1
Overall block
diagram
Analog circuits — includes source circuits such as the pulse-width modulator, H-drive,
and class D output stages, as well as measurement circuits such as the sensor signal
conditioning and A/D converter circuits.
Digital circuits — includes the microcomputer that controls the analog section, front
panel, and GPIB and RS-232 ports, as well as associated interfacing circuits.
Power supplies — converts the AC line voltage into DC voltages that supply the power
for the digital and analog circuits, and the class D power amplifier.
Analog Section
Pulse
Width
Modulator
DAC
Control
Register
H Drive
Class D
Output
Stage
Over I
Limit
TEC
I/V
Sensing
Output to TEC
Mux
A/D
Converter
Display,
Keyboard
Front
Panel
Controller
Sensor
Signal
Conditioning
RS-232
Input from
Temperature
Sensor
To Analog
Circuits
Trigger
Link
Trigger,
Digital
I/O
GPIB
Interface
Digital Section
To Digital
Circuits
±15V +5V
+15V
+5V
Analog
Power
Supply
Output
Stage
Power
Supply
Digital
Power
Supply
RS-232 I/O
Microcomputer
Digital
I/O
To Output
Stage
GPIB I/O
Power Supply
Line In
4-6
Troubleshooting
Models 2510 and 2510-AT
Analog circuits
Figure 4-2 shows a block diagram of the analog circuits. These circuits are discussed in
more detail in the following paragraphs.
Figure 4-2
Block diagram of
analog circuits
DAC
U127
Pulse
Width
Modulator
U110
H Drive
U107
Class D
Output
Stage
Output
Filter
Q107Q110
L106
L107
L115
Source
Control
Register
Over
Current
Limit
TEC
I/V
Sensing
U143
R102
U105
U132
U147
U151
Mux
Sensor
Signal
Conditioning
Measure
Control
Register
U134U136
Digital Control
From MPU
U142
U124
U149
OUTPUT
Terminals
INPUT
Terminals
Measure Signal
To A/D
Converter
Source circuits
The Model 2510 source is a digitally controlled, class D power amplifier with the output
stage in an H-bridge configuration. U127 is a 16-bit DAC that controls the pulse-width modulator U110. The H-drive IC, U107, switches the four output FETs, Q107 - Q110. Output filtering
is provided by L106, L107, L115, and associated components. Control information for the
DAC and H-drive circuit is fed through serial-to-parallel converter U143.
The source amplitude voltage is controlled by varying the duty cycle of the pulse-width
modulator and, ultimately, the output stage with the digital control information fed to the DAC
and the serial-to-parallel converter. For example, with a duty cycle of 50%, the output is 2.5V.
The hardware current limit circuit consists of R102, U105, U132, and associated components. The output stage current that flows through R102 develops a voltage that is amplified by
U105 and compared with a programmed current limit in 10-bit DAC U132. If the current value
exceeds the pre-programmed limit, the H-drive IC is disabled, turning off the output stage.
Class D Amplifier
Figure 4-3 shows a simplified schematic of the class D amplifier output stage. The H_DAC
converts control information from the processor into an analog signal that controls the pulsewidth modulator (PWM) through the H-bridge control. The IP_DAC converts current limit
control information from the processor and forms the BRIDGE OFF signal that turns off the
output stage in an over-current condition.
I_LIM
10K
PWM_CLK
F
10K
+
-
10K
F
3.01K
0.1UF
+
BRIDGEOFF
2
470PF
1
0.1µf 30.1K
20K
HIP4081
BRIDGEOFF
PWM
I_LIM
3
1.7K
500
F
0.02
+15V
F
F
1Ω
Figure 4-3
Simplified schematic
of class D amplifier
IP_DAC
H_DAC
U118
F
1K
Models 2510 and 2510-AT
Troubleshooting
4-7
4-8
Troubleshooting
Models 2510 and 2510-AT
H-bridge
Figure 4-4 shows a simplified schematic of the H-bridge output stage switching as well as
the pulse-width modulator waveforms. The four output stage transistors function as simple
switches with the switching phases and duty cycles controlled by the pulse-width modulator as
shown.
Figure 4-4
Simplified schematic of
H-bridge output stage
+15V
AHI
BHI
DUT
ALO
BLO
A. H-Bridge Switching
ALO
PWM
Input Voltage
Pulse
Width
Modulator
BHI
AHI
BLO
B. Pulse-Width Modulator Waveforms
Models 2510 and 2510-AT
Troubleshooting
4-9
Figure 4-5 shows alternate switching phases of the H-bridge output stage as well as a simplified schematic of the step-down “buck” regulator. Note that the bridge switches between alternate configurations as shown, with the duration and duty cycles controlled by the pulse-width
modulator. The step-down “buck” regulator smooths the H-bridge switching waveform into a
constant DC level.
Figure 4-5
H-bridge switching and
step-down regulator
+15V
+15V
DUT
DUT
A. H-Bridge
I
B. Step-Down “Buck” Regulator
4-10
Troubleshooting
Models 2510 and 2510-AT
Measurement circuits
Signal conditioning for the external temperature sensor is provided by U124, U149, and
associated components. Voltage and current feedback signals from the TEC output terminals
are developed by U147 and U151.
The conditioned temperature sensor, voltage, and current, feedback signals are fed to the
multiplexer IC, U142, that switches among the signals during the various phases of the measurement cycle. The output of the mux is fed to the A/D converter for conversion to digital data.
Additional signals switched by the mux during the measurement cycle include a reference voltage, reference temperature, internal circuit board temperature signal, and an internal +15V
measurement.
Sensor conditioning
Figure 4-6 shows a simplified schematic of the sensor conditioning circuits. In this example,
measurement using a 10kΩ thermistor is assumed. Sensor conditioning for other thermistor
ranges and sensor types is similar.
Figure 4-6
Sensor conditioning
for 10kΩ thermistor
+15V
2 Wire
THPFBK
GND +
DUT
GND -
2 Wire
SHUNT_10K
10K
100K
MEAS_10K
Models 2510 and 2510-AT
Troubleshooting
4-11
A constant current is forced through the DUT (thermistor) as well as a reference resistor (in
this example, 10kΩ for the 10kΩ range). As various phases of the measurement cycle, the voltages across the DUT and 10kΩ reference resistor are measured, and the actual DUT resistance
is computed from the ratio of the two voltages. Since the resistance of the 10kΩ reference resistance is accurately known (as determined during instrument calibration), the DUT resistance
and a given temperature can be accurately determined, and internal software converts the resistance into an equivalent temperature reading.
A/D converter
The Model 2510 unit uses a multi-slope charge balance A/D converter with a single-slope
run-down. The converter is controlled by a gate array. Commands are issued by the MPU to the
gate array, and the gate array IC sends A/D reading data back to the MPU for calibration and
processing.
PID hardware loop control
Figure 4-7 shows an overall diagram of the hardware aspects of the PID control loop.
Figure 4-7
PID hardware control loop
HDAC
“D”
Amplifier
U127
0.1Ω
68332
MUX
ADC
U142
ITHP
VTHP
REF
ZERO
THP_FBK
PC_TEMP
+15V MEAS
TEMP_REF
U147
U151
2Ω
4-12
Troubleshooting
Models 2510 and 2510-AT
As previously discussed, source control information from the 68332 processor is fed to the
HDAC where it is converted into an analog signal to control the class D amplifier output.
Power supply
Figure 4-8 shows a block diagram of the Model 2510 power supply system.
Figure 4-8
Power supply
block diagram
Analog Circuits
+15VA
+5VA
Class D
Power Amplifier
A
-15VA
+15VPWR
Digital
Circuits
Constant Frequency
Low Noise Floating
Switching Supply
+15V DC
D
+5VD
DC
Regulator
+5VF
F
Line In
100-240V AC
PFC
Power Supply
Module
DC
Regulator
The integrated switching power supply module provides all power for the instrument while
providing universal inputs and power factor correction for the 120/240V line. The +15VPWR
voltage from the module powers the output stage directly, and this supply voltage is further regulated to develop a +5VF (floating) supply voltage and the +5VD (digital) voltage that powers
the digital circuits.
A constant-frequency switching supply also runs off the +15V power module supply and
generates the supply voltages for the analog circuits: +5VA and ±15FA.
Models 2510 and 2510-AT
Troubleshooting
4-13
Digital circuitry
Refer to Figure 4-9 for the following discussion on digital circuitry.
Figure 4-9
Digital circuitry
overall block diagram
ROM
RAM
U168
U160
Serial
Interface
U166
Reset
RS-232 Interface
E 2 PROM
U141
A/D
Control/Data
GPIB
Microprocessor
U163
U167, U169
U170
IEEE-488 Interface
A/D Interface
U171
To Display
Board Controller
16.78MHz
Voltage Source
Control
Trigger
Link
U165
Digital I/O
U164
Trigger
Link
Digital
I/O
The core digital circuitry uses a Motorola 68332 microcontroller (U163) running at
16.78MHz. The memory configuration includes a flash EEPROM (U168) and a RAM (U160).
Flash ROM support allows internal firmware upgrades using either the serial or GPIB port for
downloading new firmware. All calibration constants and the saved setups are stored in a separate serial EEPROM (U141).
External communication is provided via GPIB and serial interfaces. A 9914 GPIB IEEE-488
standard interface IC (U167) is used for the GPIB, and a U166 provides the voltage conversion
for the RS-232 port. U164 provides interfacing for the Digital I/O port.
4-14
Troubleshooting
Models 2510 and 2510-AT
Figure 4-10 shows a diagram for digital control that includes serial-to-parallel converters
U134 to U136 and associated control signal nomenclatures.
Figure 4-10
Digital control circuits
A/D IN
U136
MUXC
MUXB
MUXA
10_MA Range*
N.C.
SHUNT_100*
SHUNT_1K
SHUNT_10K
U135
MEAS_DUT_HI*
MEAS_DUT_LO*
GND+*
GND-*
GAIN_4*
GAIN_16*
A2DGND*
N.C.
SDAT
MUXSTB
ADTS
U163
68332
U145
ADTX
U134
RNGSTB
ADCLK
ADRXB
SCLKOUTN
PWM_OUT
PWM_CLK
U116
OFFSTB
U143
HCON
IPDAC
U132
HDAC
U127
<8>
<16>
<16>
MEAS_100K*
MEAS_10K*
MEAS_1K*
MEAS_100*
2_WIRE*
1MA*
100UA*
I_DIV_3
Models 2510 and 2510-AT
Troubleshooting
4-15
Display board circuits
U902 is the display microcontroller that controls the VFD (vacuum fluorescent display) and
interprets key data. The microcontroller has four peripheral I/O ports that are used for the various control and read functions.
Display data is serially transmitted to the microcontroller from the digital board via the TXB
line to the microcontroller PD0 terminal. In a similar manner, key data is serially sent back to
the mother board through the RXB line via PD1. The 4MHz clock for the microcontroller is
generated on the digital board.
DS901 is the VFD (vacuum fluorescent display) module, which can display up to 49 characters. Each character is organized as a 5 × 7 matrix of dots or pixels and includes a long underbar segment to act as a cursor.
The display uses a common multiplexing scheme with each character refreshed in sequence.
U903 and U904 are the grid drivers, and U901 and U905 are the dot drivers. Note that dot
driver and grid driver data is serially transmitted from the microcontroller (PD3 and PC1).
Troubleshooting
Troubleshooting information for the various circuits is summarized below. Refer to the component layout drawings at the end of Section 6 for component locations.
Display board checks
If the front panel display tests indicate that there is a problem on the display board, use
Table 4-1. See “Principles of operation” for display circuit theory.
Table 4-1
Display board checks
Step Item/component Required condition
1
2
3
4
5
6
Front panel test
J1033
U902, pin 1
U902, pin 43
U902, pin32
U902, pin 33
Verify that all segments operate.
+5V, ±5%
Goes low briefly on power up, and then goes high.
4MHz square wave.
Pulse train every 1 ms.
Brief pulse train when front panel key is pressed.
Remarks
Use front panel display test.
Digital +5V supply.
Microcontroller RESET.
Controller 4MHz clock.
Control from main processor.
Key down data sent to main
processor.
4-16
Troubleshooting
Models 2510 and 2510-AT
Power supply checks
Power supply problems can be checked out using Table 4-2. See “Principles of operation”
for circuit theory on the power supply.
Table 4-2
Power supply checks
Step Item/component Required condition
1
2
3
4
5
6
7
8
9
Line fuse
Line power
J1003, pin 3
TP102
TP112
TP101
TP105
TP106
TP107
Check continuity.
Plugged into live receptacle, power on.
+15V, ±10% (+15VPWR)
+5V, ±5% (+5VF)
+5V, ±5% (+5VD)
+15V, ±5% (+15VA)
-15V, ±5% (-15VA)
+5V, ±5% (+5VA)
+5V, ±5% (+5VRF)
Remarks
Remove to check.
Check for correct power-up sequence.
Referenced to TP121.
Referenced to TP121.
Referenced to U163, pin 19.
Referenced to TP122.
Referenced to TP122.
Referenced to U104, pin 2.
Referenced to U104, pin 2.
Digital circuitry checks
Digital circuit problems can be checked out using Table 4-3. See “Principles of operation”
for a digital circuit description.
Table 4-3
Digital circuitry checks
Step Item/component Required condition
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
Power-on test
U163 pin 19
U163 pin 7
U163 pin 68
U163, A0-A19
U163, D0-D15
U163 pin 66
U166 pin 7
U166 pin 8
U167 pins 34-42
U167 pins 26-31
U167 pin 24
U167 pin 25
U163 pin 43
U163 pin 44
U163 pin 45
U163 pin 47
RAM OK, ROM OK.
Digital common. common.
+5V
Low on power-up, then goes high.
Check for stuck bits.
Check for stuck bits.
16.78MHz.
Pulse train during RS-232 I/O.
Pulse train during RS-232 I/O.
Pulse train during IEEE-488 I/O.
Pulses during IEEE-488 I/O.
Low with remote enabled.
Low during interface clear.
Pulse train.
Pulse train.
Pulse train.
Pulse train
Remarks
Verify that RAM and ROM are functional.
All signals referenced to digital common.
Digital logic supply.
MPU RESET line.
MPU address bus.
MPU data bus.
MPU clock.
RS-232 TX line.
RS-232 RX line.
IEEE-488 data bus.
IEEE-488 command lines.
IEEE-488 REN line.
IEEE-488 IFC line.
D_ADDATA
D_DATA
D_CLK
D_STB
Models 2510 and 2510-AT
Troubleshooting
4-17
Analog circuitry checks
Table 4-4 summarizes analog circuitry checks.
NOTE
All measurements are with the V function selected, +5V output voltage, 5A current
limit, and 1Ω and 100Ω resistors connected to the OUTPUT and INPUT terminals
respectively. Turn OUTPUT ON while measuring.
Table 4-4
Analog circuitry checks
Step Item/component1 Required condition
1
2
3
4
5
6
7
8
9
TP1031
TP1041
TP1082
TP1092
TP1102
TP1142
TP1182
TP1192
TP1202
+10.4V
+4V
+6.3V
-12.5V
+12.5V
0V
Pulse train
0.5V
5V
Remarks
H drive signal
H drive signal
A/D reference signal
-14V nominal supply
+14V nominal supply
Sensor feedback signal
Mux output to A/D converter
OUTPUT current sense signal
OUTPUT voltage sense signal
6. Measured with respect to F common (TP121).
7. Measured with respect to A2 common (TP122).
Internal fuse replacement
WARNING
Disconnect the line cord and all cables and test leads from the instrument
before replacing internal fuses.
CAUTION
Do not install a fuse with a higher current rating than specified, or instrument damage may occur.
Power supply module fuse replacement
An internal fuse protects the power supply module from over-current conditions. Replace
this fuse as follows:
1.
2.
3.
4.
Turn off the power, and disconnect the line cord and all other test leads and cables from
the instrument.
Remove the case cover and mother board, as covered in Section 5.
Locate the fuse on the power supply module circuit board. The module is mounted on
the chassis bottom.
Replace the fuse with one with the same current and voltage rating marked on the
power supply module circuit board.
4-18
Troubleshooting
Models 2510 and 2510-AT
Digital I/O +5V supply fuse replacement
An internal fuse protects the +5V supply line on the ENABLE-DIG I/O connector from
over-current conditions. Replace this fuse as follows:
1.
2.
3.
4.
5.
6.
Turn off the power, and disconnect the line cord and all other test leads and cables from
the instrument.
Remove the case cover, as covered in Section 5.
Locate fuse F101 on the mother board. This fuse is located near the ENABLE-DIG I/O/
RS-232 connector assembly (J1007) at the back of the board. See the 2510-100 component layout drawing at the end of Section 6 for location.
Carefully unsolder the blown fuse.
Replace the fuse with one with the following rating: 0.6A, Keithley part number
FU-103, then solder it in place.
After soldering, clean the mother board as covered in Section 5, “Handling and cleaning precautions.”
No comm link error
A “No Comm Link” error indicates that the front panel processor has stopped communicating with the main processor, which is located on the mother board. This error indicates that the
main processor ROM (U168) may require reseating in its socket. The ROM may be reseated as
follows:
1.
2.
3.
4.
Turn off the power, and disconnect the line cord and all other test leads and cables from
the instrument.
Remove the case cover as outlined in Section 5.
Locate the firmware ROM, U168, located on the digital board. This ROM is the only IC
installed in a socket. (Refer to the 2510-100 component layout drawing at the end of
Section 6 for exact location.)
Carefully push down on the ROM IC to make sure it is properly seated in its socket.
CAUTION
5.
Be careful not to push down excessively, or you might crack the mother
board.
Connect the line cord, and turn on the power. If the problem persists, additional troubleshooting will be required.
5
Disassembly
5-2
Disassembly
Models 2510 and 2510-AT
Introduction
This section explains how to handle, clean, and disassemble the Model 2510. Disassembly
drawings are located at the end of this section.
Handling and cleaning
To avoid contaminating PC board traces with body oil or other foreign matter, avoid touching the PC board traces while you are repairing the instrument. Mother board areas covered by
the shield have high-impedance devices or sensitive circuitry where contamination could cause
degraded performance.
Handling PC boards
Observe the following precautions when handling PC boards:
•
•
•
•
•
Wear cotton gloves.
Only handle PC boards by the edges and shields.
Do not touch any board traces or components not associated with repair.
Do not touch areas adjacent to electrical contacts.
Use dry nitrogen gas to clean dust off PC boards.
Solder repairs
Observe the following precautions when you must solder a circuit board:
•
•
•
•
Use an OA-based (organic activated) flux, and take care not to spread the flux to other
areas of the circuit board.
Remove the flux from the work area when you have finished the repair by using pure
water with clean, foam-tipped swabs or a clean, soft brush.
Once you have removed the flux, swab only the repair area with methanol, then blowdry the board with dry nitrogen gas.
After cleaning, allow the board to dry in a 50°C, low-humidity environment for several
hours.
Models 2510 and 2510-AT
Disassembly
5-3
Static sensitive devices
CMOS devices operate at very high impedance levels. Therefore, any static that builds up on
you or your clothing may be sufficient to destroy these devices if they are not handled properly.
Use the following precautions to avoid damaging them:
CAUTION
•
•
•
•
•
•
•
Many CMOS devices are installed in the Model 2510. Handle all semiconductor devices as being static sensitive.
Transport and handle ICs only in containers specially designed to prevent static buildup. Typically, you will receive these parts in anti-static containers made of plastic or
foam. Keep these devices in their original containers until ready for installation.
Remove the devices from their protective containers only at a properly grounded work
station. Ground yourself with a suitable wrist strap.
Handle the devices only by the body; do not touch the pins.
Ground any printed circuit board into which a semiconductor device is to be inserted to
the bench or table.
Use only anti-static type desoldering tools.
Use only grounded-tip solder irons.
Once the device is installed in the PC board, it is normally adequately protected, and
you can handle the boards normally.
Assembly drawings
Use the assembly drawings located at the end of this section to assist you as you disassemble
and reassemble the Model 2510. Refer to these drawings for information about the Keithley
part numbers of most mechanical parts in the unit. Assembly drawings include:
•
•
•
•
•
Front panel assembly — 2510-040
Chassis/power module assembly — 2510-050
Front panel/chassis assembly — 2510-051
Chassis assembly — 2510-052
Final inspection — 2510-080
5-4
Disassembly
Models 2510 and 2510-AT
Case cover removal
Follow the steps below to remove the case cover to gain access to internal parts.
WARNING
1.
2.
NOTE
3.
4.
5.
Before removing the case cover, disconnect the line cord and any test leads
from the instrument.
Remove handle — The handle serves as an adjustable tilt-bail. Adjust its position by
gently pulling it away from the sides of the instrument case and swinging it up or down.
To remove the handle, swing the handle below the bottom surface of the case and back
until the orientation arrows on the handles line up with the orientation arrows on the
mounting ears. With the arrows lined up, pull the ends of the handle away from the
case.
Remove mounting ears — Remove the screw that secures each mounting ear. Pull
down and out on each mounting ear.
When reinstalling the mounting ears, make sure to mount the right ear to the right
side of the chassis, and the left ear to the left side of the chassis. Each ear is marked
“RIGHT” or “LEFT” on its inside surface.
Remove rear bezel — To remove the rear bezel, loosen the two screws that secure the
rear bezel to the chassis, then pull the bezel away from the case.
Remove bottom screws — Remove the four screws that secure the case to the chassis.
They are located on the bottom of the case.
Remove chassis — To remove the case, grasp the front bezel of the instrument, and
carefully slide the chassis forward. Slide the chassis out of the metal case.
Mother board removal
Perform the following steps to remove the mother board. This procedure assumes that the
case cover is already removed.
1.
2.
3.
Remove the IEEE-488, ENABLE-DIG I/O, and RS-232 fasteners.
The IEEE-488, ENABLE-DIG I/O, and RS-232 connectors each have two hex-head
screws that secure the connectors to the rear panel. Remove these screws.
Remove mother board mounting screws.
Remove the two mounting screws that secure the mother board to the chassis.
Unplug cables:
• Unplug the display board ribbon cable from J1014.
• Unplug the cables going to the power supply from J1003.
• Unplug the cable going to the OUTPUT indicator from J102.
• Unplug the fan cable from J1015.
Models 2510 and 2510-AT
4.
Disassembly
5-5
Remove mother board.
Slide the mother board forward until the slots line up with the guide pins, then remove
the board.
During reassembly, replace the mother board, and start the IEEE-488, ENABLE-DIG
I/O, and RS-232 connector screws and the board mounting screws. Tighten all the fasteners once they are all in place and the board is correctly aligned. Be sure to plug in all
cables.
Front panel disassembly
Use the following procedure to remove the display board and/or the pushbutton switch pad.
1.
2.
3.
4.
5.
Remove the power switch rod. Carefully disconnect the power switch rod from the
power switch mounted on the rear panel power module. Slide the rod toward the rear
until it clears the access hole in the front panel, then remove the rod.
Remove the front panel assembly. This assembly has four retaining clips that snap onto
the chassis over four pem nut studs. Two retaining clips are located on each side of the
front panel. Pull the retaining clips outward and, at the same time, pull the front panel
assembly forward until it separates from the chassis.
Unplug the display board ribbon cables.
Using a thin-bladed screw driver, pry the plastic PC board stop (located at the bottom of
the display board) until the bar separates from the casing. Pull the display board from
the front panel.
Remove the switch pad by pulling it from the front panel.
Removing power components
The following procedures to remove the power supply and/or power module require that the
case cover and mother board be removed, as previously explained.
Power supply module removal
Perform the following steps to remove the power supply module:
1.
2.
3.
Remove the wires that connect the power supply module to the rear panel power
module.
Remove any cable clamps or cable ties that secure the power supply module wires.
Remove the screws that secure the power supply to the chassis bottom, then remove the
module.
5-6
Disassembly
Models 2510 and 2510-AT
Power module removal
Perform the following steps to remove the rear panel power module:
1.
2.
Disconnect the power module's ground wire. This green and yellow wire connects to a
threaded stud on the chassis with a kep nut.
Squeeze the latches on either side of the power module while pushing the module from
the access hole.
Fan removal
1.
2.
Remove the two nuts that secure the fan to the rear of the chassis.
Remove the fan from the chassis.
Instrument reassembly
Reassemble the instrument by reversing the previous disassembly procedures. Make sure
that all parts are properly seated and secured, and that all connections are properly made.
WARNING
To ensure continued protection against electrical shock, verify that power
line ground (green and yellow wire attached to the power module) is connected to the chassis.
Also make sure the four bottom case screws are properly installed to secure
and ground the case cover to the chassis.
6
Replaceable Parts
6-2
Replaceable Parts
Models 2510 and 2510-AT
Introduction
This section contains replacement parts information and component layout drawings for the
Model 2510.
Parts lists
The electrical parts lists for the Model 2510 are shown in the tables at the end of this section.
For part numbers to the various mechanical parts and assemblies, use the Miscellaneous parts
list and the assembly drawings provided at the end of Section 5.
Ordering information
To place an order, or to obtain information concerning replacement parts, contact your
Keithley representative or the factory (see inside front cover for addresses). When ordering
parts, be sure to include the following information:
•
•
•
•
•
Instrument model number (Model 2510)
Instrument serial number
Part description
Component designation (if applicable)
Keithley part number
Factory service
If the instrument is to be returned to Keithley Instruments for repair, perform the following:
•
•
•
•
Call the Repair Department at 1-800-552-1115 for a Return Material Authorization
(RMA) number.
Complete the service form at the back of this manual, and include it with the
instrument.
Carefully pack the instrument in the original packing carton.
Write ATTENTION REPAIR DEPARTMENT and the RMA number on the shipping
label.
Component layouts
The component layouts for the circuit boards are provided on the following pages. Drawings
include:
•
•
Mother board — 2510-100
Display board — 2400-110
Models 2510 and 2510-AT
Replaceable Parts
6-3
Table 6-1
Mother board parts list
Circuit designation
Description
Keithley
part no.
C101,C102,C204,C205,C206,C207
CAP, 680U, 20%, 50V ALUM ELEC
C-578-680
C103,C106
CAP, 2.2U, 10%, 50V TANTALUM
C-563-2.2
C104,105,118,121,122,125,126,127,157,158
CAP, .1UF, 20%, 50V CERAMIC
C-418-.1
C107,109,112,114,135,136,143,152,155,161
CAP, .1UF, 10%, 25V, CERAMIC
C-495-.1
C110,C113
CAP, .033U, 10%, 50V CERAMIC
C-491-.033
C111,C128,C188,C189,C192,C194,C290
CAP, 1UF, 20%, 35V, TANTALUM
C-494-1
C115,C175
CAP, 2200P, 1%, 50V CERAMIC
C-532-2200P
C116,C174
CAP, 220PF, 10%, 100V, CERAMIC
C-451-220P
C119,C172,C185
CAP, 100PF, 5%, 100V CERAMIC
C-465-100P
C120
CAP, 470P, 10%, 100V, CERAMIC
C-451-470P
C123,131,132,133,134,137,138,141,142,146
CAP, 22UF, 20%, 25V, TANTALUM
C-440-22
C130
CAP, 100UF, 20%, 10V, ALUM ELEC
C-483-100
C139,C140,C144,C145
CAP, 47U, 20%, 50V, ALUM
C-579-47
C151,156,178,187,199,210,236,150
CAP, 22UF, 20%, 25V, TANTALUM
C-440-22
C162,163,167,170,171,181,182,196,198,200
CAP, .1UF, 10%, 25V, CERAMIC
C-495-.1
C164,C184
CAP, 2200P, 10%, 100V CERAMIC
C-430-2200P
C165,166,186,193,220,225,226,229,230,231
CAP, .01UF, 10%, 50V CERAMIC
C-491-.01
C168,169,183,195,197,250,268
CAP, 47P, 5%, 100V, CERAMIC
C-465-47P
C173,251,266,117,147,297-305
CAP, 1000PF,10%, 50V, MONO CERAMIC
C-452-1000P
C176,177,180,208,209,214,215,216,253,271
CAP, .1UF, 20%, 50V CERAMIC
C-418-.1
C179,C247,C260,C265,C275,C292
CAP, 100P, 10%, 100V CERAMIC
C-451-100P
C201,202,203,211,212,213,219,221,222
CAP, .1UF, 10%, 25V, CERAMIC
C-495-.1
C223
CAP, 47PF, 10%, 100V, CERAMIC
C-451-47P
C224,C228
CAP, 15P, 1%, 100V CERAMIC
C-512-15P
C227,233,234,237,238,239,240,241,243
CAP, .1UF, 10%, 25V, CERAMIC
C-495-.1
C232,C235,C242,C245,C282
CAP, .01UF, 10%, 50V CERAMIC
C-491-.01
C246,248,249,252,254,255,256,261,267,269
CAP, .1UF, 10%, 25V, CERAMIC
C-495-.1
C270,C295,C218,C296
CAP, .1UF, 20%, 50V CERAMIC
C-418-.1
C272,C273
CAP, 1UF, 20%, 100V, CERAMIC
C-487-1
C277,278,280,281,283-289,291,293,294
CAP, .1UF, 10%, 25V, CERAMIC
C-495-.1
C279
CAP, .1UF, 20%,100V, CERAMIC
C-436-.1
CR101,CR113
DIODE, MBRS140T3
RF-110
6-4
Replaceable Parts
Models 2510 and 2510-AT
Table 6-1 (cont.)
Mother board parts list
Circuit designation
Description
Keithley
part no.
CR102
ULTRA FAST BRIDGE RECTIFIER, EDF1BM
RF-123
CR103,CR104,CR105,CR106
ULTRAFAST POWER RECTIFIER
RF-107
CR107,CR108,CR130
DIODE, SWITCHING, MMBD914
RF-83
CR109,CR110,CR111,CR112,CR133
DIODE, SWITCHING, MMSD914T19
RF-112
CR114
DIODE, DUAL HSM-2822T31
RF-95
CR115,CR116,CR122-CR129,CR131,CR132
DIODE, DUAL SWITCHING, BAV99L
RF-82
CR117,CR118,CR119,CR120,CR121
DIODE, DUAL COMMON ANODE BAW56LT2 RF-98
F101
POLYSWITCH, SMD030-2
FU-103
HS101,HS105-HS110
HEAT SINK
HS-55
J1001
CONNECTOR, MODULES
CS-834
J1003
CONNECTOR, HEADER
CS-784-4
J1006
CONN, MICRODIN W/GND FINGERS
CS-792
J1007
CONN, D-SUB DUAL STACK M-F
CS-1072-1
J1008
CONN, RIGHT ANGLE, 24 PIN
CS-501
J101
CONN,BERG
CS-339
J1014
CONN, HEADER STRAIGHT SOLDER PIN
CS-368-16
J102,J1015
LATCHING HEADER,FRICTON, SGL ROW
CS-724-3
K101
N.C RELAY, 1 FORMB, AQV214
RL-176
K102
MINI POWER RELAY, DK1A-5V
RL-249
L101,L105
CHOKE, 22UH
CH-66-22
L102,L103,L104
FERRITE BEAD
CH-91
L106,L107,L116
HIGH CURRENT TOROID
CH-103-1
L108,L109,L110,L111,L112,L113,L114,L118
FERRITE CHIP 600 OHM BLM32A07
CH-62
L115
EMI SUPPRESSION INDUCTOR
CH-84
L117,L120
CHOKE, EMI
CH-57
L119,L121,L122,L123,L124
FERRITE CHIP 600 OHM BLM32A07
CH-62
L125
CHOKE, 100MHZ
CH-50
PS101
POWER SUPPLY DC-DC CONVERTER
PS-76-1A
Q101,Q102,Q104,Q119
TRANS, NPN, MMBT3904
TG-238
Q103
TRANS, PNP, MMBT3906L
TG-244
Q105,Q106
TRANS, N CHANNEL MOSFET, BUZ11
TG-211
Q107,Q108,Q109,Q110
HEXFET POWER MOSFET, IRFZ44N
TG-354
Models 2510 and 2510-AT
Replaceable Parts
6-5
Table 6-1 (cont.)
Mother board parts list
Circuit designation
Description
Keithley
part no.
Q111,Q116,Q117
TRANS, P-CHAN, MOSFET, TP0610T
TG-259
Q112,Q113,Q114,Q115,Q120,Q121,Q122,Q123 TRANS, N-MOSFET, VN0605T
TG-243
Q124,Q125,Q126,Q127
TRANS, N-MOSFET, VN0605T
TG-243
R101,R103,R104,R105,R188
RES, 10, 5%, 125MW METAL FILM
R-375-10
R102
RES, .02, 1.5W, 1%
R-468-.02
R107,R198,R200
RES, 20K, 1%, 100MW, THICK FILM
R-418-20K
R112,R113
RES, 200K, 1%, 125MW, METAL FILM
R-391-200K
R114,115,106,123,208,135,136,130,157,143
RES, 1K, 1%, 100MW, THICK FILM
R-418-1K
R116,R117,R150,R161,R162,R199,R209,R221
RES, 475, 1%, 100MW, THICK FILM
R-418-475
R119,R118,R141
RES, 30.1K, 1%, 100MW, THICK FILM
R-418-30.1K
R120,R142
RES, 24.3, 1%, 100MW, THICK FILM
R-418-24.3
R121
RES, 3.01K, 1%, 100MW, THICK FILM
R-418-3.01K
R122
RES, 1.74K, 1%, 100MW, THICK FILM
R-418-1.74K
R124,R126,R307
RES, .0499, 1%, 100MW, THICK FILM
R-418-.0499
R125,127,131,165,151,152,168,169,171
RES, 10K, 1%, 100MW, THICK FILM
R-418-10K
R132,R311
RES, 7.5K, 1%, 100MW, THICK FILM
R-418-7.5K
R133
RES, 51, 5%, 125MW, METAL FILM
R-375-51
R134,R137,R201,R306
RES, 200, 1%, 100MW, THICK FILM
R-418-200
R138,R139,R316
RES, 5.11K, 1%, 100MW, THICK FILM
R-418-5.11K
R146,147,167,177,178,202,216,217,218,219
RES, 1K, 1%, 100MW, THICK FILM
R-418-1K
R148,R149,R255,R256,R257,R279,R284,R140
RES, 2.21K, 1%, 100MW, THICK FILM
R-418-2.21K
R153
RES, 49.9K, 1%, 100MW, THICK FILM
R-418-49.9K
R154
RES, 1.28M, .1%, 1/8W, METAL FILM
R-176-1.28M
R159
RES, 4.99K, 1%, 125mW, METAL FILM
R-391-4.99K
R160
RES, 100K, 1%, 100MW, THICK FILM
R-418-100K
R163
RES, 2.49K, 1%, 125MW, METAL FILM
R-391-2.49K
R164
RES, 20K, .1%, 1/10W, METAL FILM
R-263-20K
R170
RES, 2.49K, .1%, .125MW, THIN FILM
R-456-2.49K
R172
RES, 10K, .1%, .125W, THIN FILM
R-456-10K
R173
RES, 249K, .1%, .125W, THIN FILM
R-456-249K
R174
RES, 27.7K, .1%, .125W, THIN FILM
R-456-27.7K
R175
RES, 10K, .1%, 1/10W, METAL FILM
R-263-10K
6-6
Replaceable Parts
Models 2510 and 2510-AT
Table 6-1 (cont.)
Mother board parts list
Circuit designation
Description
Keithley
part no.
R176
RES, 1K, .1%, 1/10W, METAL FILM
R-263-1K
R179
RES, 100K, .1%, 1/10W, METAL FILM
R-263-100K
R180
RES, 34K, 1%, 100MW, THICK FILM
R-418-34K
R181,R248,R254,R270
RES, 4.75K, 1%, 100MW, THICK FILM
R-418-4.75K
R182
RES, 82.5, 1%, 100MW, THICK FILM
R-418-82.5
R183,R293,R295,R297,R299,R301,R303
RES, 5.11K, 1%, 100MW, THICK FILM
R-418-5.11K
R184
RES, 470,5%, 125MW, METAL FILM
R-375-470
R185,189,239,294,296,298,300,302,304
RES, 100, 1%, 100MW, THICK FILM
R-418-100
R186
RES, 6.65K, .1%, 1/10W, METAL FILM
R-263-6.65K
R187
RES NET
TF-245
R190,R191,R192,R193,R194,R195,R196,R197
RES, 5.11K, 1%, 100MW, THICK FILM
R-418-5.11K
R203
RES, .1, 1%, 3W
R-475-.1
R210,R305,R313,R314,R315,R320
RES, 10K, 1%, 100MW, THICK FILM
R-418-10K
R211,R215,R252
RES, 10M, 1%, 125MW, THICK FILM
R-418-10M
R212
RES, 18K, .1%, 1/10W, METAL FILM
R-263-18K
R213,235,236,241-247,249-251,253,263-266
RES, 10K, 1%, 100MW, THICK FILM
R-418-10K
R214
RES, 3.2K, .1%, 1/10W, METAL FILM
R-263-3.2K
R220,222,230,231,258-262,267,272,280,281
RES, 1K, 1%, 100MW, THICK FILM
R-418-1K
R223,R224,R225,R226,R227,R228,R229,R232
RES, 475, 1%, 100MW, THICK FILM
R-418-475
R233,R234,R237
RES, 475, 1%, 100MW, THICK FILM
R-418-475
R238
RES, 15k, 1%, 100MW, THICK FILM
R-418-15K
R240
RES, 332K, 1%, 100MW, THICK FILM
R-418-332K
R268,R269,R271,R274-277,282,283,285-290
RES, 10K, 1%, 100MW, THICK FILM
R-418-10K
R273
RES, 100, 5%, 250MW, METAL FILM
R-376-100
R278
RES, 100, .1%, 1/10W, METAL FILM
R-263-100
R291,292,312,R158
RES, 1K, 1%, 100MW, THICK FILM
R-418-1K
R308
RES, .1%, 1/10W, METAL FILM
R-263-229
R309
RES, 56.2, .1%, 1/10W, METAL FILM
R-263-56.2
RV101
TRANSIENT VOLTAGE SUPPRESSOR
VR-25
SO-168
SOCKET PLCC-032-T-A
SO-143-32
T101
TRANSFORMER
TR-315A
TP103,TP104,TP111-TP113,TP118-TP120
SURFACE MOUNT PCB TEST POINT
CS-1026
Models 2510 and 2510-AT
Replaceable Parts
6-7
Table 6-1 (cont.)
Mother board parts list
Circuit designation
Description
Keithley
part no.
TP121,TP122
SURFACE MOUNT PCB TEST POINT
CS-1026
U101
IC, +5V VOLTAGE REGULATOR, LM2940CT
IC-576
U102
IC, VOLTAGE REGULATOR
IC-1133
U103
IC, -15V VOLTAGE REGULATOR
IC-1135
U104
IC, VOLTAGE REGULATOR
IC-1132
U105,U119
IC, DUAL FET OPAMP
IC-1128
U107
IC, 80V 2.5A FULL BRIDGE FET DRIVER
IC-1139
U108,U109,U123
IC, 2 - INPUT AND GATE
IC-1140
U110
IC, HIGH SPEED PWM CONTROLLER
IC-1119
U113
IC, SUPPLY VOLT SUPERVISOR,TL7705A
IC-860
U114
IC, AJD SHUNT REGULATOR, TL431CLP
IC-677
U115,U150
IC, SINGLE TRANSISTOR OPTO COUPLER
IC-1182
U116
IC, HIGH SPEED PWN CONTROLLER
IC-1120
U118
IC, VOLT COMPARATOR LM393D
IC-775
U120,U124
IC, OPA177GS
IC-960
U121
IC, PRECISION BIFET OPAMP
IC-1194
U122
IC, DUAL BIPOLAR OP-AMP, LT1124CS8
IC-955
U125,U172
IC, VOLTAGE REFERENCE
IC-1065
U126,U130,U131,U152,U153
IC, CMOS ANAL SWITCH, DG444DY
IC-866
U127
IC, +5V 16 BIT DAC, MAX542ACSD
IC-1176
U128
IC, VOLT. COMPARATOR, LM311M
IC-776
U129
IC, OP-AMP, NE5534D
IC-802
U132
IC, +5V 10 BIT DAC, MAX515CSA
IC-1331
U133
IC, NCHAN LAT DMOS QUADFET, SD5400CY IC-893
U134,U135,U136,U143
IC, 8 STAGE SHIFT C074HC409AM
IC-1026
U138
IC, QUAD D FLIP FLOP W/CLK, RESET
74HC175
IC-923
U139,U140
IC, QUAD 2 IN NOR, 74HCT02
IC-809
U141
IC, SERIAL EPROM 24LC16B
LSI-153
U142
IC, 8-CHAN ANA MULTIPLEXER, DG408DY
IC-844
U145
PROGRAM
2000-802A02
U146
IC, DUAL D-TYPE F/F, 74HC74
IC-773
6-8
Replaceable Parts
Models 2510 and 2510-AT
Table 6-1 (cont.)
Mother board parts list
Circuit designation
Description
Keithley
part no.
U147,U151
IC, DIFFERENTIAL AMP, INA117P
IC-889
U148
IC, OP-AMP, LOW NOISE LT1007CS8
IC-949
U149
IC, OPAMP
IC-1357
U155,U158,U154
IC, HCPL0631, PACK
IC-1153
U156,U157
IC, HIGH SPEED OPTO COUPLER
IC-1225
U159,U165
IC, POS NAND GATES/INVERT, 74HCT14
IC-656
U160
IC, 64KX16 BIT CMOS STATIC RAM
LSI-215-1
U161
IC, 2 INPUT EXCLUSIVE OR GATE, NC7SZ86 IC-1180
U163
IC, MICROCONTROLLER MC68332-FC
LSI-161
U164
IC, PROTECTED QUAD POWER DRIVERS
IC-1212
U166
IC, +5V RS-232 TRANSCEIVER, MAX202
IC-952
U167
IC, GPIB ADAPTER, 9914A
LSI-123
U168
PROGRAMMED ROM
2510-800*
U169
IC, OCTAL INTER BUS TRANS,75161
IC-647
U170
IC, OCTAL INTERFACE BUS, 75160
IC-646
U171,U137
IC, 2-INPUT OR GATE
IC-1206
U173
IC, CURRENT SOURCE, LM334H
IC-421
U174
IC, CENTIGRADE TEMP SENSOR, LM35DZ
IC-933
VR103,VR104
DIODE, ZENER, 6.2V MMSZ6V2
DZ-97
VR105
DIODE
DZ-127
VR106
DIODE, ZENER 30V BZX84C30
DZ-106-30
W101,W102
JUMPER, .300
J-7-1
Y101
OSCILLATOR HIGH SPEED CMOS 12MHZ
CR-37
Y102
CRYSTAL, FSM327
CR-41
*Order current firmware revision, for example 2510-800A01.
Models 2510 and 2510-AT
Replaceable Parts
Table 6-2
Display board parts list
Circuit designation
Description
Keithley
part no.
C901
CAP, 22UF, 20%, 6.3 TANTALUM
C-417-22
C902,C904,C907,C908,C910
CAP, .1UF, 20%,100V, CERAMIC
C-436-.1
C903,C905,C906,C909,C911
CAP, .1UF, 20%, 50V, CERAMIC
C-418-.1
C912
CAP, 2.2UF, 20%,100V, ALUM ELEC
C-503-2.2
C913,C914
CAP, 100UF, 20%, 16V, TANTALUM
C-504-100
C915,C916
CAP, 33PF, 10%, 100V, CERAMIC
C-451-33P
CR901,CR902,CR903,CR904
DIODE, SWITCHING, 250MA,BAV103
RF-89
CR905,CR906
DIODE, SWITCHING, MMBD914
RF-83
DS901
VACUUM FLUORESCENT DISPLAY
DD-51C
J1032
CONN, BERG
CS-339
J1033
CONN, HEADER STRAIGHT SOLDER PIN
CS-368-16
Q901,Q902
TRANS, NPN GEN PURPOSE BC868
TG-293
R901
RES NET, 15K, 2%, 1.875W
TF-219-15K
R902
RES, 13K, 5%,125MW, METAL FILM
R-375-13K
R903,R904
RES, 4.7K, 5%, 250MW, METAL FILM
R-376-4.7K
R905
RES, 1M, 5%, 125MW, METAL FILM
R-375-1M
R906
RES, 1K, 5%, 250MW, METAL FILM
R-376-1K
R907
RES, 240, 5%, 250MW, METAL FILM
R-376-240
R908
RES, 10M, 5%, 125MW, METAL FILM
R-375-10M
T901
TRANSFORMER, TDK, ER14.5 SERIES
TR-300
U901,U904,U905
IC, LATCHED DRIVERS, UCN-5812EPF-1
IC-732
U902
PROGRAMMED ROM
7001-800*
U903
IC, 32-BIT, SERIAL UCN5818EPF-1
IC-830
VR901
DIODE, ZENER, 8.2V, MMBZ5237
DZ-92
Y901
CRYSTAL, 4MHZ
CR-36-4M
*Order current revision level, for example 7001-800A02.
6-9
6-10
Replaceable Parts
Models 2510 and 2510-AT
Table 6-3
Miscellaneous parts list
Qty.
Description
Keithley part no.
1
BEZEL, REAR
428-303D
1
CHASSIS
2510-301A
1
CONDUCTIVE RUBBER SWITCH
2510-315A
1
COVER
2510-307A
1
DISPLAY LENS
2510-311B
1
FAN
FN-39-1
2
FOOT
428-319A
2
FOOT, EXTRUDED
FE-22A
2
FOOT,RUBBER
FE-6
1
FUSE HOLDER
FH-39
1
FUSE, EXP. 2.5/5X20MM
FU-106-2.5
1
HANDLE
428-329F
1
LENS, LED
6517-309B
1
LINE CORD
CO-7
1
LINE MODULE
PM-1-1B
1
MATING INPUT/OUTPUT CONNECTOR
CS-846
1
MEMBRANE SWITCH, FRONT PANEL
6430-313A
1
MODIFIED FRONT PANEL
2510-308A
1
MOUNTING EAR, LEFT
428-338B
1
MOUNTING EAR, RIGHT
428-328E
1
OVERLAY FRONT PANEL
2510-309A
2
PC BOARD STOP
2001-371A
1
POWER ROD
2001-320A
1
POWER SUPPLY
PS-77-1A
1
REAR PANEL
2510-303A
A
Specifications
PURCHASED ITEM
2510 TEC SourceMeter
The Model 2510 Thermoelectric Cooler Controller is designed to:
• control the power to the TEC to maintain a constant temperature,
current, voltage, or thermistor resistance
• measure the resistance of the TEC
• software PID loop
TEC OUTPUT SPECIFICATIONS
OUTPUT RANGE: ±10 VDC at up to ±5 ADC.
OUTPUT RIPPLE: <5mV rms.5
AC RESISTANCE EXCITATION: ±(9.6mA + 190µA).10, 11
CONTROL SYSTEM SPECIFICATIONS
TEC MEASUREMENT SPECIFICATIONS
SET: Constant Peltier Temperature
Constant Peltier Voltage
Constant Peltier Current
Constant Thermistor Resistance
CONTROL METHOD:
Programmable software PID loop.
Proportional, Integral, and Derivative gains independently programmable.
SETPOINT SHORT TERM STABILITY: ±0.005°C rms.2, 3
SETPOINT LONG TERM STABILITY: ±0.01°C.2, 4
SETPOINT RANGE: –50°C to 225°C.
OVER TEMPERATURE LIMIT: 250°C max.
UNDER TEMPERATURE LIMIT: –50°C max.
SETPOINT RESOLUTION: 0.001°C, 1mV, 100µA, 0.01% of nominal (25°C)
thermistor resistance.
HARDWARE CURRENT LIMIT: 1.0A to 5.25A ±5%.
SOFTWARE VOLTAGE LIMIT:±0.5 to 10.5V ±5%.
FUNCTION
Operating
Resistance 1, 6, 7, 8
Operating Voltage 1, 6
Operating Current 6
AC Resistance 1, 13
1 Year, 23°C ±5°C
±(2.0% of rdg + 0.1Ω)
±(0.1% of rdg + 4mV)
±(0.4% of rdg + 8mA)
±(0.10% of rdg + 0.02Ω)
OPEN SHORTED THERMOELECTRIC DETECTION
LOAD IMPEDANCE: Stable into 1µF typical.
COMMON MODE VOLTAGE: 30VDC maximum.
COMMON MODE ISOLATION: >109Ω, <1500pF.
MAX. SENSE LEAD RESISTANCE: 1Ω for rated accuracy.
MAX. FORCE LEAD RESISTANCE: 0.1Ω.
THERMAL FEEDBACK ELEMENT SPECIFICATIONS (1 Year, 23°C ±5°C)
Sensor Type
RTD
Excitation 9
Compliance
Nominal Resistance Range
Excitation Accuracy
Nominal Sensor
Temperature Range
Sensor Coefficients
Measurement Accuracy
±(% rdg + offset)
Thermistor
100 Ω
2.50 mA
1 kΩ
833 µA
100 Ω
2.5 mA
1 kΩ
833 µA
10 kΩ
100 µA
0–250 Ω
±2.9%
0-2.50 kΩ
±2.9%
0–1 kΩ
±2.9%
0–10 kΩ
±2.9%
0–80 kΩ
±2.9%
100 kΩ
33 µA
833 µA max
0–200 kΩ
±2.9%
–50° to +250°C
A, B, C
–50° to +250°C
A, B, C
0.04 + 0.4 Ω1
0.02 + 3 Ω1
–50° to +250°C
α, β, δ
–50° to +250°C –50° to +250°C
α, β, δ
A, B, C
0.04 + 0.07 Ω
0.04 + 0.4 Ω
0.04 + 0.07 Ω1
THERMISTOR MEASUREMENT ACCURACY14
Nominal
Thermistor
Resistance
100 Ω
1 kΩ
10 kΩ
100 kΩ
25°C
0.035°C
0.023°C
0.012°C
0.014°C
50°C
0.070°C
0.045°C
0.026°C
0.026°C
BRUNING 40-21 62198-SBG
A
B
REVISIONS
24052 REL
27123 REV
–50° to +250°C
A, B, C
–40° to +100°C
Slope & offset
–40° to +100°C
Slope & offset
0.04 + 21 Ω
0.03 + 100 nA
0.03 + 500 µV
NOTES
CMRR12
90 dB
SOURCE OUTPUT MODES: Fixed DC level.
PROGRAMMABILITY: IEEE-488 (SCPI-1995.0), RS-232, 3 user-definable power-up states plus
factory default and *RST.
POWER SUPPLY: Nominal 100 to 240VAC rms, 50–60Hz, 90VA.
WARRANTY: 1 year.
EMC: Conforms to European Union Directive 89/336/EEC, EN 61326-1.
SAFETY: Conforms to European Union Directive 73/23/EEC, EN 61010-1.
VIBRATION: MIL-PRF-28800F Class 3 Random Vibration.
WARM-UP: 1 hour to rated accuracies.
DIMENSIONS, WEIGHT: 89mm high × 213 mm wide × 370mm deep (31⁄2 in × 83⁄8 in × 149⁄16 in).
Bench configuration (with handle & feet): 104mm high × 238mm wide × 370mm deep (41⁄8 in
× 93⁄8 in × 149⁄16 in). Net Weight: 3.8kg (8.38 lbs).
ENVIRONMENT: Operating: 0°–50°C, 70% R.H. up to 35°C. Derate 3% R.H./°C, 35°–50°C.
Storage: –25° to 65°C
LTR
±2.9%
COMMON MODE VOLTAGE: 30VDC.
COMMON MODE ISOLATION: >109Ω, <1000pF
MAX. VOLTAGE DROP IN INPUT FORCE LEADS: 1 volt.
MAX. SENSE LEAD RESISTANCE: 100Ω for rated accuracy.
SENSE INPUT IMPEDANCE: > 1·108Ω.
100°C
0.27°C
0.18°C
0.15°C
0.13°C
GENERAL
NOISE REJECTION:
SPEED
NPLC
Normal
1.00
±12%
OPEN/SHORTED ELEMENT DETECTION
SOFTWARE LINEARIZATION FOR THERMISTOR AND RTD
Accuracy vs. Temperature
0°C
0.021°C
0.015°C
0.006°C
0.009°C
Solid State
Current
Voltage
Output (ISS)
Output (VSS)
+13.5V
2.5 mA
833 µA
15.75 V max
APP. DATE DRN.
SZ
4/12/00 CKD.
SZ
4/10/02
APP.
HW
SK
DATE
DATE
DATE
1 With remote voltage sense.
2 With 10kΩ thermistor as sensor.
3 Short term stability is defined as
24 hours with Peltier and Model
2510 at 25°C ±0.5°C.
4 Long term stability is defined as
30 days with Peltier and Model
2510 at 25°C ±0.5°C.
5 10Hz to 10MHz measured at 5A
output into a 2Ω load.
6 Common mode voltage = 0V
(meter connect enabled, connects
Peltier low output to thermistor
measure circuit ground). ±(0.1%
of rdg + 0.1Ω) with meter connect
disabled.
7 Resistance range 0Ω to 20Ω for
rated accuracy.
8 Current through Peltier > 0.2A.
9 Default values shown, selectable
values of 3µA, 10µA, 33µA, 100µA,
833µA, 2.5mA. Note that temperature control performance will
degrade at lower currents.
10 AC Ohms is a dual pulsed measurement using current reversals
available over bus only.
11 @23°C ±5°C.
12 For 1kΩ unbalance in LO lead.
Minimum amplifier specification.
13 Resistance range 0Ω to 100Ω for
rated accuracy.
14 Accuracy figures represent the
uncertainty that the Model 2510
may add to the temperature
measurement, not including thermistor uncertainty. These accuracy figures are for thermistors with
typical A, B, C constants.
HW 3/13/02
Rev. B
4/2/02
4/2/02
Keithley Instruments, Inc.
Cleveland, Ohio 44139
PART NUMBER
SPECIFICATIONS
FORM 28777A-SBG
SPEC-2510
Models 2510 and 2510-AT
Specifications
A-3
Accuracy calculations
The information below discusses how to calculate accuracy for both TEC measurement and
thermal feedback element specifications.
Accuracy specifications are stated as follows:
Accuracy = ±(% of reading + offset)
As an example of how to calculate the actual limits, assume an output voltage of 5V. You can
compute the limits from one-year operating voltage accuracy specifications as follows:
Accuracy =
±(% of reading + offset)
±[(0.1% X 5V) + 4mV]
±(5mV + 4mV)
±9mV
Thus, the actual operating voltage range is: 5V± 9mV, or from 4.991 to 5.009V.
B
Calibration Reference
B-2
Calibration Reference
Models 2510 and 2510-AT
Introduction
This appendix contains detailed information on the various Model 2510 remote calibration
commands, calibration error messages, and methods to detect the end of each calibration step.
Section 2 of this manual covers detailed calibration procedures.
Command summary
Table B-1 summarizes Model 2510 calibration commands. These commands are covered in
detail in the following paragraphs.
Table B-1
Calibration commands
Command
Description
:CALibration
:PROTected
:CODE '<password>'
:CODE?
:SENSe
:VOLTage <NRf>
:DATA?
:CURRent <NRf>
:DATA?
:TEMPerature <NRf>
:DATA?
:SOURce <NRf>
:DATA?
:AUTO
:IPDac
:DATA?
:RESistance
[:AC] <NRf>
:DATA?
:DATE <yyyy>,<mm>,<dd>
:DATE?
:NDUE <yyyy>,<mm>,<dd>
:NDUE?
:SAVE
:LOCK
:LOCK?
:COUNt?
Calibration subsystem.
Calibration commands protected by code/password.
Unlock calibration. (Default code/password: KI002510.)
Query calibration code/password.
Calibrate Peltier voltage measurement.
Query Peltier voltage calibration constants.
Calibrate current measurement.
Query current calibration constants.
Calibrate temperature measurement.
Query temperature calibration constants.
Calibrate Peltier source/sense voltage.
Query Peltier source/sense calibration constants.
Calibrate voltage source.
Calibrate current protection DAC.
Query current protection DAC calibration constants.
Calibrate AC ohms.
Query AC ohms calibration constants
Program calibration year, month, day.
Query calibration date.
Program calibration due year, month, day.
Query calibration due date.
Save calibration data in EEPROM.
Lock out calibration.
Query if calibration is locked. (1 = locked; 0 = unlocked).
Query number of times Model 2510 has been calibrated.
Models 2510 and 2510-AT
Calibration Reference
B-3
Miscellaneous commands
Miscellaneous commands are those commands that perform such functions as unlocking
calibration, saving calibration constants, locking out calibration, and programming date
parameters.
:CODE
(:CALibration:PROTected:CODE)
Purpose
To unlock calibration so that you can perform the calibration procedures.
Format
:cal:prot:code '<password>'
Parameters
Up to a 8-character string including letters and numbers.
Description
The :CODE command sends the password/code and enables calibration
when performing these procedures via remote. The correct password must
be sent to the unit before sending any other calibration command. The
default remote password is KI002510.
NOTE
•
The :CODE command should be sent only once before performing calibration.
Do not send :CODE before each calibration step.
•
To change the code, first send the present code, then send the new code.
•
The password parameter must be enclosed in single quotes.
•
If you change the first two characters of the password to something other than
“KI”, you will not be able to unlock calibration from the front panel.
Example
:CAL:PROT:CODE 'KI002510'
Send default code of KI002510.
:COUNT?
(:CALibration:PROTected:COUNT?)
Purpose
To request the number of times the Model 2510 has been calibrated.
Format
:cal:prot:count?
Response
Number of times calibrated.
Description
The :COUNT? query may be used to determine the total number of times
the Model 2510 has been calibrated.
Example
:CAL:PROT:COUNT?
Request calibration count.
B-4
Calibration Reference
Models 2510 and 2510-AT
:LOCK
(:CALibration:PROTected:LOCK)
Purpose
To lock out calibration.
Format
Query
:cal:prot:lock
Response
0
1
Description
The :LOCK command allows you to lock out calibration after completing
the procedure. Thus, :LOCK performs the opposite of sending the password
with the :CODE command. The :LOCK? query returns calibration lock
status.
NOTE
:cal:prot:lock?
Calibration unlocked
Calibration locked
To unlock calibration, send the :CODE command with the appropriate password.
Example
:CAL:PROT:LOCK
Lock out calibration
:SAVE
(:CALibration:PROTected:SAVE)
Purpose
To save calibration constants in EEROM after the calibration procedure.
Format
:cal:prot:save
Description
The :SAVE command stores internally calculated calibration constants
derived during comprehensive in EEROM. EEROM is non-volatile memory,
and calibration constants will be retained indefinitely once saved. Generally,
:SAVE is sent after all other calibration steps (except for :LOCK).
NOTE
Calibration will be only temporary unless the :SAVE command is sent to permanently store calibration constants. Calibration data will not be saved if calibration
was not unlocked by sending the :CODE command or if invalid calibration data
exists.
Example
:CAL:PROT:SAVE
Save calibration constants
Models 2510 and 2510-AT
Calibration Reference
B-5
:DATE
(:CALibration:PROTected:DATE)
Purpose
To program the calibration date.
Format
:cal:prot:date <year>, <month>, <day>
Parameters
<year> = 2000 to 2099
<month> = 1 to 12
<day> = 1 to 31
Query
:cal:prot:date?
Response
<year> , <month> , <day>
Description
The :DATE command allows you to store the calibration date in instrument
EEROM for future reference. You can read back the date from the instrument by using the :DATE? query, or by using the front panel CAL menu.
NOTE
The year, month, and day parameters must be delimited by commas.
Example
:CAL:PROT:DATE 2000,11,20
Send cal date (11/20/2000).
:NDUE
(:CALibration:PROTected:NDUE)
Purpose
To send the next calibration due date to the instrument.
Format
:cal:prot:ndue <year>, <month>, <day>
Parameters
<year> = 2000 to 2099
<month> = 1 to 12
<day> = 1 to 31
Query
:cal:prot:ndue?
Response
<year>, <month>, <day>
Description
The :NDUE command allows you to store the date when calibration is next
due in instrument memory. You can read back the next due date by using the
:NDUE? query, or by using the front panel CAL menu.
NOTE
The next due date parameters must be delimited by commas.
Example
:CAL:PROT:NDUE 2001,11,20
Send due date (11/20/2001).
B-6
Calibration Reference
Models 2510 and 2510-AT
SENSe commands
:VOLTage
(:CALibration:PROTected:SENSe:VOLTage)
(:CALibration:PROTected:SENSe:VOLTage:DATA?)
Purpose
To calibrate the Peltier voltage measurement.
Format
:cal:prot:sens:volt <DMM_Reading>
Parameters
<DMM_Reading> =
Query
:cal:prot:sens:volt:data?
Description
The :CAL:PROT:SENS:VOLT command calibrates the Model 2510 Peltier
voltage measurement. During the calibration process, this command is sent
three times; once each with parameters of approximately +F.S, 0, and -F.S.
The actual parameters are voltage readings taken with a precision DMM.
3.5 to 12.5[V] = cal at + F.S.
-2.5 to 2.5[V] = zero cal
-3.5 to -12.5[V] = cal at - F.S.
The :CAL:PROT:SENS:VOLT:DATA? query allows you to request the Peltier voltage calibration parameters.
Example
:CAL:PROT:SENS:VOLT 8.51
Calibrate positive voltage.
:CURRent
(:CALibration:PROTected:SENSe:CURRent)
(:CALibration:PROTected:SENSe:CURRent:DATA?)
Purpose
To calibrate the current measurement.
Format
:cal:prot:sens:curr <Resistor_Value>
Parameters
<Resistor_Value> = 0.5 to 1.5[Ω]
Query
:cal:prot:sens:curr:data?
Description
The :CAL:PROT:SENS:CURR command calibrates the Model 2510 current
measurement. During the calibration process, a 1Ω (nominal) resistor must
be connected to the OUTPUT terminals, and the source is automatically set
to +4.5V, 0V, and -4.5V. The command parameter is the characterized value
of the 1Ω resistor.
The :CAL:PROT:SENS:CURR:DATA? query allows you request the current calibration parameters.
Example
:CAL:PROT:SENS:CURR 1.01
Calibrate current.
Models 2510 and 2510-AT
Calibration Reference
B-7
:TEMPerature
(:CALibration:PROTected:SENSe:TEMPerature)
(:CALibration:PROTected:SENSe:TEMPerature:DATA?)
Purpose
To calibrate the temperature sensor measurements.
Format
:cal:prot:sens:temp <Value>
Parameters
<Resistor_Value> = 100kΩ thermistor: 0 to 125e3[Ω]
10kΩ thermistor: 0 to 12.5e3[Ω]
1kΩ thermistor: 0 to 1.25e3[Ω]
100Ω thermistor: 0 to 125[Ω]
100Ω RTD: 0 to 125[Ω]
1000Ω RTD: 0 to 1250 [Ω]
VSS: 0V to 5[V]
ISS: 350 to 1.25e3[Ω] then 0.01 to 1.5[V]
Query
:cal:prot:sens:temp:data?
Description
The :CAL:PROT:SENS:TEMP command calibrates the Model 2510 temperature sensor measurements. During the calibration process, a 100Ω, 1kΩ,
10kΩ, or 100kΩ (nominal) resistor or a short must be connected to the
INPUT terminals, and the characterized value, a zero value, or a voltage
reading is sent as the command parameter, depending on the calibration step
(see Section 2 for details). The appropriate sensor and range must first be
selected with the following commands:
•
Enable 4-wire sensing:
:SYST:RSEN ON
•
Thermistor sensor:
:SENS:TEMP:TRAN THER
•
Thermistor range:
:SENS:TEMP:THER:RANG <Range>
•
RTD sensor:
:SENS:TEMP:TRAN RTD
•
RTD range:
:SENS:TEMP:RTD:RANG <Range>
•
ISS sensor:
:SENS:TEMP:TRAN ISS
•
VSS sensor:
:SENS:TEMP:TRAN VSS
The :CAL:PROT:SENS:TEMP:DATA? query allows you request the temperature sensor calibration parameters.
Example
:CAL:PROT:SENS:TEMP 100.5
Calibrate temperature sensor.
B-8
Calibration Reference
Models 2510 and 2510-AT
SOURce commands
:SOURCE
(:CALibration:PROTected:SOURce)
(:CALibration:PROTected:SOURce:DATA?)
Purpose
To calibrate the Peltier source/sense voltage.
Format
:cal:prot:sour <DMM_Reading>
Parameters
<DMM_Reading> =
Query
:cal:prot:sour:data?
Description
The :CAL:PROT:SOUR command calibrates the Model 2510 Peltier
source/sense voltage. During the calibration process, this command is sent
three times; once each with parameters of approximately +F.S (full scale), 0,
and -F.S. The actual parameters are voltage readings taken with a precision
DMM.
3.5 to 12.5[V] = cal at + F.S.
-2.5 to 2.5[V] = zero cal
-3.5 to -12.5[V] = cal at - F.S.
The :CAL:PROT:SOUR:DATA? query allows you request the voltage calibration parameters.
Example
:CAL:PROT:SOUR 8.51
Calibrate with positive voltage.
:AUTO
(:CALibration:PROTected:SOURce:AUTO)
Purpose
To calibrate the voltage source.
Format
:cal:prot:sour:auto
Description
The :CAL:PROT:SOUR:AUTO command calibrates the Model 2510 voltage source. Disconnect all test leads or equipment from the OUTPUT terminals before sending this command.
Example
:CAL:PROT:SOUR:AUTO
Calibrate voltage source.
Models 2510 and 2510-AT
Calibration Reference
B-9
DAC commands
:IPDac
(:CALibration:PROTected:IPDac)
(:CALibration:PROTected:IPDac:DATA?)
Purpose
To calibrate the current protection DAC.
Format
Query
:cal:prot:ipd
Description
The :CAL:PROT:IPD command calibrates the current protection DAC. A
resistor of less than 1.5Ω must be connected to the OUTPUT terminals
before this command is sent.
:cal:prot:ipd:data?
The :CAL:PROT:IPD:DATA? query allows you request the current protection DAC calibration parameters.
Example
:CAL:PROT:IPD
Calibrate current protection DAC.
RESistance commands
:RESistance
(:CALibration:PROTected:RESistance[:AC])
(:CALibration:PROTected:RESistance[:AC]:DATA?)
Purpose
To calibrate the AC ohms circuit.
Format
:cal:prot:res <Resistance_Value>
Parameters
<Resistance_Value> = 10 to 1e3 [Ω] (100 default)
Query
:cal:prot:res:data?
Description
The :CAL:PROT:RES command calibrates the Model 2510 AC ohms circuit. A 10Ω to 1kΩ (100Ω preferred) resistor must be connected to the
OUTPUT terminals, and the characterized value of that resistor is used as
the :CAL:PROT:RES command parameter. The output is off.
The :CAL:PROT:RES:DATA? query requests the AC ohms calibration
constants.
Example
:CAL:PROT:RES 99.5
Calibrate with 100Ω nominal resistor.
B-10
Calibration Reference
Models 2510 and 2510-AT
Detecting calibration errors
If an error occurs during any calibration step, the Model 2510 will generate an appropriate
error message. Several methods to detect calibration errors are discussed below.
Reading the error queue
As with other Model 2510 errors, any calibration errors will be reported in the error queue.
(You can read the error queue by using the :SYST:ERR? query.)
Error summary
Table B-2 summarizes calibration errors. If errors occur, and :CAL:PROT:SAVE is sent, calibration constants without errors will be saved while those with errors will not.
Status byte EAV (Error Available) bit
Whenever an error is available in the error queue, the EAV (Error Available) bit (bit 2) of the
status byte will be set. Use the *STB? query to obtain the status byte, then test bit 2 to see if it
is set. If the EAV bit is set, an error has occurred, and you can use the appropriate error query to
read the error and at the same time clear the EAV bit in the status byte.
Generating an SRQ on error
To program the instrument to generate an IEEE-488 bus SRQ (Service Request) when an
error occurs, send the following command: *SRE 4. This command will enable SRQ when the
EAV bit is set. You can then read the status byte and error queue as outlined above to check for
errors and to determine the exact nature of the error.
Models 2510 and 2510-AT
Calibration Reference
Table B-2
Calibration errors
Error number
+500
+501
+502
+509
+510
+520
+521
+522
+523
+524
+525
+530
+531
+532
+533
+540
+541
+542
+543
+550
+551
+552
+553
+560
+561
+562
+563
+564
+565
+566
+570
Error message
“Date of calibration not set”
“Next date of calibration not set”
“Calibration data invalid”
“Not permitted with cal locked”
“Not permitted with cal un-locked”
“Source + gain data invalid”
“Source + offset data invalid”
“Source - gain data invalid”
“Source - offset data invalid”
“Source DAC Overflow”
“Source DAC Underflow”
“I Protection gain data invalid”
“I Protection offset data invalid”
“I Protection DAC Overflow”
“I Protection DAC Underflow”
“V Meas + gain data invalid”
“V Meas + offset data invalid”
“V Meas - gain data invalid”
“V Meas - offset data invalid”
“I Meas + gain data invalid”
“I Meas + offset data invalid”
“I Meas - gain data invalid”
“I Meas - offset data invalid”
“100 Ohm Thermistor data invalid”
“1kOhm Thermistor data invalid”
“10kOhm Thermistor data invalid”
“100kOhm Thermistor data invalid”
“RTD data invalid”
“VSS data invalid”
“ISS data invalid”
“AC Ohms data invalid”
B-11
B-12
Calibration Reference
Models 2510 and 2510-AT
Detecting calibration step completion
When sending remote calibration commands, you must wait until the instrument completes
the current operation before sending another command. You can use either *OPC? or *OPC to
help determine when each calibration step is completed.
Using the *OPC? query
With the *OPC? (operation complete) query, the instrument will place an ASCII 1 in the output queue when it has completed each step. To determine when the OPC response is ready, do
the following:
1.
2.
3.
Repeatedly test the MAV (Message Available) bit (bit 4) in the status byte and wait until
it is set. (You can request the status byte by using the *STB? query.)
When MAV is set, a message is available in the output queue, and you can read the output queue and test for an ASCII 1.
After reading the output queue, repeatedly test MAV again until it clears. At this point,
the calibration step is completed.
Using the *OPC command
The *OPC (operation complete) command can be used to detect the completion of each
calibration step. In order to use *OPC to detect the end of each calibration step, do the
following:
1.
2.
3.
4.
Enable operation complete by sending *ESE 1. This command sets the OPC (operation
complete bit) in the standard event enable register, allowing operation complete status
from the standard event status register to set the ESB (event summary bit) in the status
byte when operation complete is detected.
Send the *OPC command immediately following each calibration command. For
example:
:CAL:PROT:SENS:VOLT 8;*OPC
Note that you must include the semicolon (;) to separate the two commands, and that
the *OPC command must appear on the same line as the calibration command.
After sending a calibration command, repeatedly test the ESB (Event Summary) bit
(bit 5) in the status byte until it is set. (Use *STB? to request the status byte.)
Once operation complete has been detected, clear OPC status using one of two methods: (1) use the *ESR? query, then read the response to clear the standard event status
register, or (2) send the *CLS command to clear the status registers. Note that sending
*CLS will also clear the error queue and operation complete status.
Models 2510 and 2510-AT
Calibration Reference
B-13
Generating an SRQ on calibration complete
An IEEE-488 bus SRQ (service request) can be used to detect operation complete instead of
repeatedly polling the Model 2510. To use this method, send both *ESE 1 and *SRE 32 to the
instrument, then include the *OPC command at the end of each calibration command line, as
covered above. Clear the SRQ by querying the ESR (using the *ESR? query) to clear OPC status, then request the status byte with the *STB? query.
Refer to your controller's documentation for information on detecting and servicing SRQs.
C
Calibration Program
C-2
Calibration Program
Models 2510 and 2510-AT
Introduction
This appendix includes a calibration program written in BASIC to help you to calibrate the
Model 2510. Refer to Section 2 for more details on calibration procedures, equipment, and connections. Appendix B covers calibration commands in detail.
Computer hardware requirements
The following computer hardware is required to run the calibration programs:
•
•
•
IBM PC compatible computer.
Keithley KPC-488.2, KPS-488.2, or KPC-488.2AT, or CEC PC-488 IEEE-488 interface
for the computer.
Two shielded IEEE-488 connecting cables (Keithley Model 7007).
Software requirements
In order to use the calibration programs, you will need the following computer software:
•
•
•
Microsoft QBasic (supplied with MS-DOS 5.0 or later) or Quick Basic.
MS-DOS version 5.0 or later or Windows 95/98/Me.
HP-style Universal Language Driver, CECHP.EXE (supplied with Keithley and CEC
interface cards listed above).
Calibration equipment
The following calibration equipment is required:
•
•
•
Keithley Model 2002 DMM.
1Ω, 100Ω, 1kΩ, 10kΩ, and 100kΩ resistors.
Clean copper wire.
See Section 2 for detailed equipment specifications.
Models 2510 and 2510-AT
Calibration Program
C-3
General program instructions
1.
2.
3.
4.
5.
6.
With the power off, connect the Model 2510 and the digital multimeter to the IEEE-488
interface of the computer. Be sure to use shielded IEEE-488 cables for bus connections.
Turn on the computer, the Model 2510, and the digital multimeter. Allow the Model 2510
and the multimeter to warm up for at least one hour before performing calibration.
Make sure the Model 2510 is set for a primary address of 15. (Use the front panel
MENU/COMMUNICATIONS/GPIB selection to check or change the address.)
Make sure the digital multimeter primary address is set to 16.
Make sure that the computer bus driver software (CECHP.EXE) is properly initialized.
Enter the QBasic editor, and type in the program below.
NOTE
Be sure to change the resistor parameters (R$, R$(1) - R$(4)) to the characterized
values of the 1Ω, 100Ω, 1kΩ, 10kΩ, and 100kΩ resistors. (See Section 2 for details.)
7.
8.
Check thoroughly for errors, then save it using a convenient filename.
Run the program, and follow the prompts on the screen to perform calibration. For test
connections, refer to the following figures in Section 2:
•
•
•
•
•
•
Voltage calibration DMM connections: Figure 2-1.
Current and current protection calibration 1Ω resistor connections: Figure 2-2.
Thermistor and RTD calibration 100Ω to 100kΩ resistor connections: Figure 2-3.
Shorted INPUT connections: Figure 2-4.
I-SS and V-SS calibration resistor/DMM connections: Figure 2-5.
AC ohms calibration 100Ω resistor connections: Figure 2-6.
C-4
Calibration Program
Program C-1
Models 2510 and 2510-AT
Model 2510 calibration program
‘ Model 2510 calibration program for use with Keithley 2002 DMM.
‘ 2510 primary address = 15. 2002 primary address = 16.
OPEN “IEEE” FOR OUTPUT AS #1
‘ Open IEEE-488 output path.
OPEN “IEEE” FOR INPUT AS #2
‘ Open IEEE-488 input path.
PRINT #1, “INTERM CRLF”
‘ Set input terminator.
PRINT #1, “OUTTERM LF”
‘ Set output terminator.
PRINT #1, “REMOTE 15 16”
‘ Put 2510, 2002 in remote.
PRINT #1, “OUTPUT 15;*RST”
‘ Initialize 2510.
PRINT #1, “OUTPUT 15;*CLS”
‘ Clear 2510 status.
PRINT #1, “OUTPUT 15;*ESE 1;*SRE 32”
‘ Enable OPC and SRQ.
PRINT #1, “OUTPUT 16;:SYST:PRES”
‘ Initialize 2002.
PRINT #1, “OUTPUT 16;:FORM:ELEM READ”
‘ 2002 reading data only.
‘
‘ Replace nominal resistor values below with characterized values.
R$ = “1”
‘ 1 ohm value.
R$(1) = “100”
‘ 100 ohm value.
R$(2) = “1e3”
‘ 1k ohm value
R$(3) = “1e4”
‘ 10k ohm value.
R$(4) = “1e5”
‘ 100k ohm value.
‘
CLS
PRINT “Model 2510 Calibration Program”
GOSUB KeyCheck
PRINT #1, “OUTPUT 15;:CAL:PROT:CODE ‘KI002510’”
J = 1
FOR I = 1 TO 46
READ Cmd$
SELECT CASE I
CASE 1
PRINT “Connect DMM INPUT to 2510 OUTPUT terminals.”
GOSUB KeyCheck
CASE 3, 4, 6, 7, 9, 10, 39, 41
GOSUB ReadDMM
Cmd$ = Cmd$ + Reading$
CASE 12
PRINT “Connect 1 ohm resistor to OUTPUT terminals.”
GOSUB KeyCheck
CASE 13
Cmd$ = Cmd$ + R$
CASE 19, 22, 25, 28, 32, 35
IF I = 32 THEN J = 1
PRINT “Connect “; R$(J); “ ohm resistor to INPUT terminals.”
GOSUB KeyCheck
Cmd$ = Cmd$ + R$(J)
J = J + 1
Models 2510 and 2510-AT
Calibration Program
CASE 20, 23, 26, 29, 33, 36, 42
PRINT “Short INPUT terminals with clean copper wire.”
PRINT “Wait 1 minute.”
GOSUB KeyCheck
CASE 38, 41
PRINT “Connect 1k ohm resistor and DMM to INPUT terminals.”
IF I = 38 THEN Cmd$ = Cmd$ + R$(2)
GOSUB KeyCheck
CASE 43
PRINT “Connect 100 ohm resistor to OUTPUT terminals.”
GOSUB KeyCheck
Cmd$ = Cmd$ + R$(1)
CASE 44
PRINT “Disconnect all equipment from OUTPUT terminals.”
GOSUB KeyCheck
END SELECT
PRINT #1, “OUTPUT 15;”; Cmd$; “;*OPC”
GOSUB CalEnd
GOSUB ErrCheck
NEXT I
LINE INPUT “Enter calibration date (yyyy,mm,dd): “; D$
PRINT #1, “OUTPUT 15;:CAL:PROT:DATE “; D$
LINE INPUT “Enter calibration due date (yyyy,mm,dd): “; D$
PRINT #1, “OUTPUT 15;:CAL:PROT:NDUE “; D$
PRINT #1, “OUTPUT 15;:CAL:PROT:SAVE”
‘ Save calibration constants.
GOSUB ErrCheck
PRINT #1, “OUTPUT 15;:CAL:PROT:LOCK”
‘ Lock out calibration.
PRINT “Calibration completed.”
PRINT #1, “LOCAL 15 16”
CLOSE
END
‘
KeyCheck:
‘ Check for key press routine.
WHILE INKEY$ <> ““: WEND
‘ Flush keyboard buffer.
PRINT : PRINT “Press any key to continue (ESC to abort program).”
DO: I$ = INKEY$: LOOP WHILE I$ = ““
IF I$ = CHR$(27) THEN GOTO EndProg
‘ Abort if ESC is pressed.
RETURN
‘
CalEnd:
‘ Check for cal step completion.
DO: PRINT #1, “SRQ?”
‘ Request SRQ status.
INPUT #2, S
‘ Input SRQ status byte.
LOOP UNTIL S
‘ Wait for operation complete.
PRINT #1, “OUTPUT 15;*ESR?”
‘ Clear OPC.
PRINT #1, “ENTER 15”
INPUT #2, S
PRINT #1, “SPOLL 15”
‘ Clear SRQ.
INPUT #2, S
RETURN
C-5
C-6
Calibration Program
Models 2510 and 2510-AT
‘
ErrCheck:
‘ Error check routine.
PRINT #1, “OUTPUT 15;:SYST:ERR?”
‘ Query error queue.
PRINT #1, “ENTER 15”
INPUT #2, E, Err$
IF E <> 0 THEN PRINT Err$: GOTO ErrCheck’ Display error.
RETURN
‘
ReadDMM:
‘ Get reading from DMM.
SLEEP 3
PRINT #1, “OUTPUT 16;:READ?”
PRINT #1, “ENTER 16”
INPUT #2, Reading$
RETURN
‘
EndProg:
‘ Close files, end program.
BEEP: PRINT “Calibration aborted.”
PRINT #1, “OUTPUT 15;:CAL:PROT:LOCK”
PRINT #1, “OUTPUT 15;*RST”
PRINT #1, “LOCAL 15 16”
CLOSE
END
‘
CmdList:
‘ Calibration command list.
DATA “:OUTP ON”,”:SOUR:VOLT 8.5”,”CAL:PROT:SENS:VOLT “,”CAL:PROT:SOUR “
DATA “:SOUR:VOLT 0”,”:CAL:PROT:SENS:VOLT “,”:CAL:PROT:SOUR “
DATA “:SOUR:VOLT -8.5”,”:CAL:PROT:SENS:VOLT “,”:CAL:PROT:SOUR “,”:OUTP OFF”
DATA “:OUTP ON”, “CAL:PROT:SENS:CURR “,”CAL:PROT:IPD”,”:OUTP OFF”
DATA “:SYST:RSEN ON”,”:SENS:TEMP:TRAN THER”
DATA “:SENS:TEMP:THER:RANG 100”,”CAL:PROT:SENS:TEMP “,”CAL:PROT:SENS:TEMP 0”
DATA “:SENS:TEMP:THER:RANG 1E3”,”:CAL:PROT:SENS:TEMP “,”CAL:PROT:SENS:TEMP 0”
DATA “:SENS:TEMP:THER:RANG 1E4”,”:CAL:PROT:SENS:TEMP “,”CAL:PROT:SENS:TEMP 0”
DATA “:SENS:TEMP:THER:RANG 1E5”,”:CAL:PROT:SENS:TEMP “,”CAL:PROT:SENS:TEMP 0”
DATA “:SENS:TEMP:TRAN RTD”,”:SENS:TEMP:RTD:RANG 100”
DATA “:CAL:PROT:SENS:TEMP “,”:CAL:PROT:SENS:TEMP 0”
DATA “:SENS:TEMP:RTD:RANG 1E3”,”:CAL:PROT:SENS:TEMP “,”CAL:PROT:SENS:TEMP 0”
DATA “:SENS:TEMP:TRAN ISS”,”:CAL:PROT:SENS:TEMP “,”:CAL:PROT:SENS:TEMP “
DATA “:SENS:TEMP:TRAN VSS”,”:CAL:PROT:SENS:TEMP “,”CAL:PROT:SENS:TEMP 0”
DATA “:CAL:PROT:RES “,”:OUTP ON”
DATA “:CAL:PROT:SOUR:AUTO”,”:OUTP OFF”
Index
Connections
AC ohms calibration 2-18
Current and current protection
calibration 2-11
for AC resistance verification test 1-11
for current verification tests 1-9
for sensor resistance accuracy
verification 1-12
for voltage verification tests 1-7
I-SS and V-SS calibration resistor 2-15
Shorted input calibration 2-13
Thermistor and RTD calibration
resistor 2-12
voltage calibration 2-9
Current accuracy 1-8
limit 1-10
Output 1-8
readback 1-9
A
Aborting calibration steps 2-8
AC resistance accuracy 1-10
Accuracy calculations A-5
Analog circuitry checks 4-17
Assembly drawings 5-3
B
Block diagram
Analog circuitry 4-6
Digital circuitry 4-13
Overall 4-5
Power supply 4-12
C
Calibration 2-1
Calibration commands B-2
Calibration considerations 2-3
Calibration cycle 2-3
Recommended calibration equipment 2-3
Resistor characterization 2-4
Calibration equipment C-2
Calibration errors 2-7, B-11
Front panel error reporting 2-7
Remote error reporting 2-7
Calibration menu 2-5
Calibration Program C-1
Calibration Reference B-1
Calibration step summary 2-9
Case cover removal 5-4
Changing the password 2-6
by remote 2-6
from the front panel 2-6
Characterized resistor values 1-4, 2-4
Class D Amplifier 4-6
Command summary B-2
Component layouts 6-2
Computer hardware requirements C-2
D
DAC commands B-9
:IPDac B-9
Detecting calibration errors B-10
Error summary B-10
Generating an SRQ on error B-10
Reading the error queue B-10
Status byte EAV (Error Available)
bit B-10
Detecting calibration step completion B-12
Generating an SRQ on calibration
complete B-13
Using the *OPC command B-12
Using the *OPC? query B-12
Digital circuitry checks 4-16
Disassembly 5-1
Display board checks 4-15
E
Environmental conditions 2-2
Line power 2-2
Temperature and relative humidity 2-2
Warm-up period 2-2
F
P
Factory service 6-2
Front panel calibration 2-8
Front panel disassembly 5-5
Front panel tests 4-3
CHAR SET test 4-4
DISPLAY PATTERNS test 4-4
KEYS test 4-3
Fuse replacement
Digital I/O +5V supply 4-18
Power supply module 4-17
Parts list
Display board 6-9
Miscellaneous 6-10
Mother board 6-3
Parts lists 6-2
Performance Verification 1-1
Performing the verification test procedures 1-5
Adjusting setpoints 1-6
Test considerations 1-6
Test summary 1-5
PID hardware loop control 4-11
Power line fuse 3-3
Power supply checks 4-16
Power-on self-test 4-3
Principles of operation 4-5
Analog circuits 4-6
A/D converter 4-11
Measurement circuits 4-10
Source circuits 4-6
Digital circuitry 4-13
Display board circuits 4-15
Overall block diagram 4-5
Power supply 4-12
G
General program instructions C-3
Program C-1 Model 2510 calibration
program C-4
H
Handling and cleaning 5-2
Handling PC boards 5-2
Solder repairs 5-2
H-Bridge 4-8
I
Instrument reassembly 5-6
Internal fuse replacement 4-17
Introduction 1-2, 2-2, 3-2, 4-2, 5-2, 6-2, B-2,
C-2
L
Line fuse replacement 3-2
M
Miscellaneous commands B-3
:CODE B-3
:COUNT? B-3
:DATE B-5
:LOCK B-4
:NDUE B-5
:SAVE B-4
Mother board removal 5-4
N
No comm link error 4-18
O
Ordering information 6-2
R
Rear panel 3-2
Recommended calibration equipment 2-4
Recommended test equipment 1-3
Resistor characterization 1-4
Recommended verification equipment 1-3
Remote calibration 2-20
command summary 2-20
procedure 2-21
Remote calibration command summary 2-20
Removing power components 5-5
Fan removal 5-6
Power module removal 5-6
Power supply module removal 5-5
Repair considerations 4-2
Replaceable Parts 6-1
Resetting the calibration password 2-7
RESistance commands B-9
:RESistance B-9
Restoring factory defaults 1-5
Routine Maintenance 3-1
S
U
Safety considerations 4-2
SENSe commands B-6
:CURRent B-6
:TEMPerature B-7
:VOLTage B-6
Sensor conditioning 4-10
Sensor measurement accuracy 1-11
Sensor resistance measurement accuracy
limits 1-13
Software requirements C-2
SOURce commands B-8
:AUTO B-8
:SOURCE B-8
Specifications A-1
Static sensitive devices 5-3
T
Troubleshooting 4-1, 4-15
Analog circuitry checks 4-17
Digital circuitry checks 4-16
Display board checks 4-15
Power supply checks 4-16
Unlocking calibration 2-5
by remote 2-6
from the front panel 2-5
V
Verification limits 1-4
Example limits calculation 1-4
Resistance limits calculation 1-4
Verification test requirements 1-2
Environmental conditions 1-2
Line power 1-3
Warm-up period 1-2
Viewing calibration dates and calibration
count 2-7
Voltage accuracy 1-6
limit 1-8
Output 1-6
readback 1-7
Service Form
Model No. ______________ Serial No.___________________Date________________
Name and Telephone No. _________________________________________________
Company ______________________________________________________________
List all control settings, describe problem and check boxes that apply to problem. _________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
❑ Intermittent
❑ Analog output follows display
❑ Particular range or function bad; specify
_______________________________
❑ IEEE failure
❑ Obvious problem on power-up
❑ Front panel operational ❑ All ranges or functions are bad
❑ Batteries and fuses are OK
❑ Checked all cables
Display or output (check one)
❑ Drifts
❑ Overload
❑ Unable to zero
❑ Will not read applied input
❑ Calibration only
❑ Certificate of calibration required
(attach any additional sheets as necessary)
❑ Unstable
❑ Data required
Show a block diagram of your measurement including all instruments connected (whether power is turned on or
not). Also, describe signal source.
Where is the measurement being performed? (factory, controlled laboratory, out-of-doors, etc.)_______________
__________________________________________________________________________________________
What power line voltage is used? ___________________ Ambient temperature? ________________________ °F
Relative humidity? ___________________________________________Other?___________________________
Any additional information. (If special modifications have been made by the user, please describe.)
__________________________________________________________________________________________
__________________________________________________________________________________________
Be sure to include your name and phone number on this service form.
Specifications are subject to change without notice.
All Keithley trademarks and trade names are the property of Keithley Instruments, Inc. All other trademarks and
trade names are the property of their respective companies.
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1FL., 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3-572-9077• Fax: 886-3-572-9031
© Copyright 2001 Keithley Instruments, Inc.
Printed in the U.S.A.
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