Tektronix Keithley SourceMeter 2410 Service Manual
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Tektronix Keithley SourceMeter 2410 Service Manual

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Model 2410
1100 V SourceMeter
Instrument
®
Service Manual
2410-902-01C / April 2017
*P2410-902-01C*
2410-902-01C

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Summary of Contents for Tektronix Keithley SourceMeter 2410

  • Page 1 www.tek.com/keithley Model 2410 1100 V SourceMeter Instrument ® Service Manual 2410-902-01C / April 2017 *P2410-902-01C* 2410-902-01C...
  • Page 2 Model 2410 1100V SourceMeter ® Service Manual © Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Third Printing, April 2017 Document Number: 2410-902-01 Rev. C...
  • Page 3 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 sub- sequent updates. Addenda, which are released between Revisions, contain important change in- formation that the user should incorporate immediately into the manual.
  • Page 4 afety 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.
  • Page 5 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. Al- ways make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.

  • Page 6: Table Of Contents

    Table of Contents Performance Verification Introduction..................1-2 Verification test requirements..............1-3 Restoring factory defaults..............1-6 Performing the verification test procedures.........1-7 Compliance considerations..............1-9 Ouptut voltage accuracy ..............1-11 Voltage measurement accuracy ............1-13 Output current accuracy..............1-14 Current measurement accuracy............1-16 Resistance measurement accuracy.............1-17 Calibration Introduction..................2-2 Environmental conditions..............2-3 Calibration considerations ..............2-4 Front panel calibration.................2-9 Remote calibration................2-16...
  • Page 7 Disassembly Introduction ..................5-2 Handling and cleaning................. 5-2 Static sensitive devices................ 5-3 Assembly drawings ................5-4 Case cover removal ................5-5 Analog board removal................. 5-6 Digital board removal................5-7 Front panel disassembly ..............5-8 Removing power components............. 5-9 Instrument re-assembly ..............5-10 Replaceable Parts Introduction ..................
  • Page 8 List of Illustrations Performance Verification Connections for voltage verification tests .........1-12 Connections for current verification tests..........1-15 Connections for resistance accuracy verification ......1-18 Calibration Voltage calibration test connections..........2-11 Current calibration test connections ..........2-13 Routine Maintenance Rear panel ....................3-3 Troubleshooting Overall block diagram .................4-5 Analog circuitry block diagram ............4-7 Power supply block diagram ...............4-8 Output stage simplified schematic............4-9...
  • Page 9 List of Tables Performance Verification Recommended verification equipment..........1-4 Output voltage accuracy limits............1-11 Voltage measurement accuracy limits..........1-13 Output current accuracy limits ............1-14 Current measurement accuracy limits ..........1-16 Ohms measurement accuracy limits..........1-18 Calibration Recommended calibration equipment..........2-5 Calibration unlocked states ..............
  • Page 10 Command Reference Remote calibration command summary ..........B-2 Recommended :CALibration:PROTected:SENSe ......B-7 parameter ranges Recommended :CALibration:PROTected:SOURce......B-9 parameter ranges Calibration errors ................B-12...

  • Page 11: Performance Verification

    Performance Verification...
  • Page 12 Performance Verification Introduction Use the procedures in this section to verify that Model 2410 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 it was not damaged during shipment. •...

  • Page 13: Verification Test Requirements

    Performance Verification 1-3 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 signal and reading limits. Environmental conditions Conduct your performance verification procedures in a test environment with: •...

  • Page 14: Recommended Verification Equipment

    Performance Verification Recommended test equipment Table 1-1 summarizes recommended verification equipment. You can use alternate equipment if that equipment has specifications at least as good as those listed in Table 1-1. Be aware, however, that test equipment uncertainty will add to the uncertainty of each measurement.
  • Page 15 Performance Verification 1-5 Verification limits The verification limits stated in this section have been calculated using only the Model 2410 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 both on Model 2410 specifications and corresponding test equipment specifications.

  • Page 16: Restoring Factory Defaults

    Performance Verification Restoring factory defaults Before performing the verification procedures, restore the instrument to its factory front panel (bench) defaults as follows: Press the MENU key. The instrument will display the following prompt: MAIN MENU SAVESETUP COMMUNICATION CAL Select SAVESETUP, and then press ENTER. The unit displays: SAVESETUP MENU GLOBAL SOURCE-MEMORY Select GLOBAL, and then press ENTER.

  • Page 17: Performing The Verification Test Procedures

    Performance Verification 1-7 Performing the verification test procedures Test summary • DC voltage output accuracy • DC voltage measurement accuracy • DC current output accuracy • DC current measurement accuracy • Resistance measurement accuracy If the Model 2410 is not within specifications and not under warranty, see the calibration procedures in Section 2 for information on calibrating the unit.

  • Page 18: Performance Verification

    Performance Verification Setting the source range and output value Before testing each verification point, you must properly set the source range and output value as outlined below. Press either the SOURCE V or SOURCE I key to select the appropriate source function. Press the EDIT key as required to select the source display field.

  • Page 19: Compliance Considerations

    Performance Verification 1-9 Compliance considerations Compliance limits When sourcing voltage, you can set the SourceMeter to limit current from 1nA to 1.05A. Conversely, when sourcing current, you can set the SourceMeter to limit voltage from 200μV to 1.1kV. The SourceMeter output will not exceed the programmed compliance limit. Types of compliance There are two types of compliance that can occur: Real and range.
  • Page 20 1-10 Performance Verification Taking the SourceMeter out of compliance Verification measurements should not be made when the SourceMeter is in compliance. For purposes of the verification tests, the SourceMeter can be taken out of compliance by going into the edit mode and increasing the compliance limit. NOTE Do not take the unit out of compliance by decreasing the source value or changing the range.

  • Page 21: Output Voltage Accuracy Limits

    Performance Verification 1-11 Output voltage accuracy Follow the steps below to verify that Model 2410 output voltage accuracy is within specified limits. This test involves setting the output voltage to each full-range value and measuring the voltages with a precision digital multimeter. With the power off, connect the digital multimeter to the Model 2410 INPUT/OUTPUT jacks as shown in Figure 1-1.

  • Page 22: Connections For Voltage Verification Tests

    1-12 Performance Verification Figure 1-1 SENSE 4-WIRE INPUT/ Ω 4 WIRE SENSE OUTPUT Connections for voltage 1100V 1100V PEAK PEAK PEAK verification tests ® 2410 1100V SourceMeter 2410 SourceMeter 250V MEAS SOURCE PEAK Ω EDIT FCTN RANGE DISPLAY EDIT TOGGLE AUTO TERMINALS LOCAL...

  • Page 23: Voltage Measurement Accuracy

    Performance Verification 1-13 Voltage measurement accuracy Follow the steps below to verify that the Model 2410 voltage measurement accuracy is within specified limits. The test involves setting the source voltage to full-range values, as measured by a precision digital multimeter, and then verifying that the Model 2410 voltage readings are within required limits.

  • Page 24: Output Current Accuracy

    1-14 Performance Verification Output current accuracy Follow the steps below to verify that Model 2410 output current accuracy is within specified limits. The test involves setting the output current to each full-range value and measuring the currents with a precision digital multimeter. With the power off, connect the digital multimeter to the Model 2410 INPUT/OUTPUT jacks as shown in Figure 1-2.

  • Page 25: Connections For Current Verification Tests

    Performance Verification 1-15 Figure 1-2 SENSE INPUT/ Ω 4 WIRE OUTPUT Connections for 1100V 1100V current verification PEAK PEAK PEAK ® 2410 1100V SourceMeter 2410 SourceMeter tests 250V MEAS SOURCE PEAK Ω EDIT FCTN RANGE DISPLAY EDIT TOGGLE AUTO TERMINALS TRIG SWEEP LOCAL...

  • Page 26: Current Measurement Accuracy

    1-16 Performance Verification Current measurement accuracy Follow the steps below to verify that Model 2410 current measurement accuracy is within specified limits. The procedure involves applying accurate currents from the Model 2410 current source and then verifying that Model 2410 current measurements are within required limits. With the power off, connect the digital multimeter to the Model 2410 INPUT/OUTPUT jacks as shown in Figure 1-2.

  • Page 27: Resistance Measurement Accuracy

    Performance Verification 1-17 Resistance measurement accuracy Follow the steps below to verify that Model 2410 resistance measurement accuracy is within specified limits. This procedure involves applying accurate resistances from a resistance calibrator and then verifying that Model 2410 resistance measurements are within required limits. With the power off, connect the resistance calibrator to the Model 2410 INPUT/ OUTPUT and 4-WIRE SENSE jacks as shown in Figure 1-3.

  • Page 28: Ohms Measurement Accuracy Limits

    1-18 Performance Verification Table 1-6 Ohms measurement accuracy limits Model 2410 resistance Model 2410 Calibrator reading limits** range resistance* (1 year, 18°C–28°C) 18.9731 to 19.0269Ω 20Ω 19Ω 200Ω 190Ω 189.709 to 190.291Ω 2kΩ 1.9kΩ 1.89788 to 1.90212kΩ 20kΩ 19kΩ 18.9807 to 19.0212kΩ 189.807 to 190.193kΩ...

  • Page 29: Calibration

    Calibration...

  • Page 30: Introduction

    Calibration Introduction Use the procedures in this section to calibrate the Model 2410. These procedures require accurate test equipment to measure precise DC voltages and currents. 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.

  • Page 31: Environmental Conditions

    Calibration Environmental conditions Temperature and relative humidity Conduct the calibration procedures at an ambient temperature of 18-28°C with relative humidity of less than 70% unless otherwise noted. Warm-up period Allow the Model 2410 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.

  • Page 32: Calibration Considerations

    Calibration Calibration considerations When performing the calibration procedures: • Make sure that the test equipment is properly warmed up and connected to the Model 2410 front panel INPUT/OUTPUT jacks. Also be certain that the front panel jacks are selected with the TERMINALS switch. •...

  • Page 33: Recommended Calibration Equipment

    Calibration Recommended calibration equipment Table 2-1 lists the recommended equipment for the calibration procedures. You can use alternate equipment as long as that equipment has specifications at least as good as those listed in the table. Where possible, test equipment specifications should be at least four times better than corresponding Model 2410 specifications.

  • Page 34: Calibration

    Calibration Once the correct password is displayed, press the ENTER key. If the password was correctly entered, the following message will be displayed: CALIBRATION UNLOCKED Calibration can now be executed. Press EXIT to return to normal display. Calibration will be unlocked and will assume the states summarized in Table 2-2.
  • Page 35 Calibration 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 'KI002410' Changing the password The default password may be changed from the front panel or via remote as discussed below. Changing the password from the front panel Follow the steps below to change the password from the front panel: Press the MENU key, then choose CAL and press ENTER.
  • Page 36 Calibration 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 also reset the password to the factory default (KI002410). See Section 5 for details on disassembling the unit to access the CAL pads.

  • Page 37: Front Panel Calibration

    Calibration Front panel calibration The front panel calibration procedure described below calibrates all ranges of both the current and voltage source and measure functions. Note that each range is separately calibrated by repeating the entire procedure for each range. Step 1: Prepare the Model 2410 for calibration Turn on the Model 2410 and the digital multimeter, and allow them to warm up for at least one hour before performing calibration.
  • Page 38 2-10 Calibration Note and record the DMM reading, and then adjust the Model 2410 display to agree exactly with the actual DMM reading. Use the up and down arrow keys to select the digit value, and use the left and right arrow keys to choose the digit position (or use the number keys, 0-9, +/-).

  • Page 39: Voltage Calibration Test Connections

    Calibration 2-11 Figure 2-1 SENSE 4-WIRE INPUT/ Ω 4 WIRE SENSE OUTPUT Voltage 1100V 1100V PEAK PEAK PEAK calibration ® 2410 1100V SourceMeter 2410 SourceMeter 250V MEAS SOURCE test connections PEAK Ω EDIT FCTN RANGE DISPLAY EDIT TOGGLE AUTO TERMINALS LOCAL FILTER LIMIT...
  • Page 40 2-12 Calibration Step 3: Current calibration Perform the following steps for each current range using Table 2-4 as a guide. Connect the Model 2410 to the digital multimeter, as shown in Figure 2-2. Select the multimeter DC current measurement function. From normal display, press the SOURCE I key.

  • Page 41: Current Calibration Test Connections

    Calibration 2-13 Note and record the DMM reading, and then adjust the Model 2410 display to agree with the DMM reading. Again, the maximum display adjustment is within ± 10% of the present range. After adjusting the display value to agree with the DMM reading, press ENTER and note that the instrument displays: I-CAL Press ENTER to Output -0.0000μA...

  • Page 42: Front Panel Current Calibration

    2-14 Calibration Table 2-4 Front panel current calibration Source Source Multimeter current range* current reading** 1µA +1.0000µA ____________ µA +0.0000µA ____________ µA -1.0000µA ____________ µA -0.0000µA ____________ µA 10µA +10.000µA ____________ µA +00.000µA ____________ µA -10.000µA ____________ µA -00.000µA ____________ µA 100µA +100.00µA ____________ µA...
  • Page 43 Calibration 2-15 Step 4: Enter calibration dates and save calibration NOTE For temporary calibration without saving new calibration constants, proceed to Step 5: Lock out calibration. From normal display, press MENU. Select CAL, and then press ENTER. The Model 2410 will display the following: CALIBRATION UNLOCK EXECUTE VIEW-DATES SAVE LOCK CHANGE-PASSWORD...

  • Page 44: Remote Calibration

    2-16 Calibration 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 commands Table 2-5 summarizes remote calibration commands. For a more complete description of these commands, refer to Appendix B.

  • Page 45: Recommended :Calibration:protected:sense

    Calibration 2-17 Recommended calibration parameters The maximum calibration command parameter ranges are: 75% to 150% of full scale for positive and negative full scale calibration points; ± zero cal- ibration steps have ±50% of full scale for valid entry ranges. However, for optimum calibration, use calibration points within the ranges listed in Table 2-6 and Table 2-7.

  • Page 46: Recommended :Calibration:protected:source

    2-18 Calibration Table 2-7 Recommended :CALibration:PROTected:SOURce parameter ranges Source First parameter Second parameter Third parameter Fourth parameter range (negative full scale) (negative zero) (positive full scale) (positive zero) 0.2V -0.18 to -0.22 -0.002 to +0.002 +0.18 to +0.22 -0.002 to +0.002 -1.8 to -2.2 -0.02 to +0.02 +1.8 to +2.2...
  • Page 47 Calibration 2-19 Step 2: Voltage calibration Connect the Model 2410 to the digital multimeter (see Figure 2-1), and select the multimeter DC volts function. Send the commands summarized in Table 2-8 in the order listed to initialize voltage calibration. (When the :CAL:PROT:CODE command is sent, the instrument will assume the operating states listed in Table 2-2.) Perform the range calibration steps listed in Table 2-9 for each range.

  • Page 48: Voltage Calibration Initialization Commands

    2-20 Calibration Table 2-8 Voltage calibration initialization commands Command Description Restore GPIB defaults. *RST :SOUR:FUNC VOLT Activate voltage source. :SENS:CURR:PROT 0.01 Current limit when voltage source is active. :SENS:CURR:RANG 0.01 Make sure 100mA range is not active. :SOUR:VOLT:PROT Maximum allowable source voltage. :SYST:RSEN OFF Disable remote sensing.* :CAL:PROT:CODE 'KI002410'...
  • Page 49 Calibration 2-21 Step 3: Current calibration Connect the Model 2410 to the digital multimeter (see Figure 2-2), and select the multimeter DC current function. Send the commands summarized in Table 2-10 in the order listed to initialize current calibration. Calibrate each current range using the procedure summarized in Table 2-11. For each range: •...

  • Page 50: Current Calibration Initialization Commands

    2-22 Calibration Table 2-10 Current calibration initialization commands Command Description :SOUR:FUNC CURR Select source current mode. :SENS:VOLT:PROT 20 Voltage limit when current source is active. :SENS:VOLT:RANG 20 Make sure 1000V range is not active. :OUTP:STAT ON Turn source on. Table 2-11 Current range calibration commands Step Command/procedure* Description...
  • Page 51 Calibration 2-23 Step 4: Program calibration dates Use following commands to set the calibration date and calibration due date: :CAL:PROT:DATE <year>, <month>, <day> (Calibration date) :CAL:PROT:NDUE <year>, <month>, <day> (Next calibration due date) Note that the year, month, and day must be separated by commas. The allowable range for the year is from 1996 to 2095, the month is from 1 to 12, and the day is from 1 to 31.

  • Page 52: Single-Range Calibration

    2-24 Calibration Single-range calibration Normally, the complete calibration procedure should be performed to ensure that the entire instrument is properly calibrated. In some instances, however, you may want to calibrate only certain ranges. To do so, complete the entire procedure only for the ranges to be calibrated. Keep in mind, however, that you must complete all parameter steps for each source or sense range.
  • Page 53 Routine Maintenance...

  • Page 54: Routine Maintenance

    Routine Maintenance 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.

  • Page 55: Routine Maintenance

    Routine Maintenance Figure 3-1 WARNING: WARNING: NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY. NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY. Rear panel V, Ω, MADE IN V, Ω, GUARD MADE IN U.S.A. GUARD U.S.A. 250V 250V LINE FUSE LISTED PEAK...

  • Page 56: Troubleshooting

    Troubleshooting...

  • Page 57: Introduction

    Troubleshooting Introduction This section of the manual will assist you in troubleshooting and repairing the Model 2410. 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 found at the end of Section 6.

  • Page 58: Front Panel Tests

    Troubleshooting 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.
  • Page 59 Troubleshooting CHAR SET test The character set test lets you display all characters. Perform the following steps to run the character set test: 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 KEYS DISPLAY-PATTERNS CHAR-SET...

  • Page 60: Principles Of Operation

    Troubleshooting Principles of operation The following information is provided to support the troubleshooting tests and procedures covered in this section of the manual. Refer to the following drawings: Figure 4-1 — Overall block diagram Figure 4-2 — Analog circuitry block diagram Figure 4-3 —...
  • Page 61 Troubleshooting Analog circuits Figure 4-2 shows the analog circuitry block. D/A converters control the programmed voltage and current, or voltage compliance and cur- rent compliance. Each DAC has two ranges, a 10V full-scale output or a 1V full-scale output. The DAC outputs are fed to the summing node, FB. Either the V DAC or the I DAC has the ability to control the main loop.
  • Page 62 Troubleshooting Figure 4-2 -1200 +1200 Analog circuitry V DAC V Clamp block diagram Output Error Sense Output Stage Resistors I Clamp I DAC Output Remote Control Protection Guard Protection Guard Sense...
  • Page 63 Troubleshooting Power supply Figure 4-3 shows a block diagram of the Model 2410 power delivery system. The offline flyback switching power supply provides all power for the instrument while providing universal inputs for the 110/120V line. The digital board runs directly from the switcher, including the +12VD supply to program the flash ROM.
  • Page 64 Troubleshooting Output stage Figure 4-4 shows a simplified schematic of the output stage. The Model 2410 output stage serves two purposes: (1) it converts signals from floating common to output common, and (2) it provides both voltage and current amplification. The output stage drive transistors are biased in class B configuration to prevent the possibility of thermal runaway with high-current output values.
  • Page 65 4-10 Troubleshooting A/D converter The SourceMeter unit uses a multi-slope charge balance A/D converter with a single-slope charge balance run-down. The converter is controlled by gate array U610. Commands are issued by the MPU on the digital board through communications opto-isolators to U610, and U610 sends A/D reading data back through opto-isolators to the digital board for calibration and processing.
  • Page 66 Troubleshooting 4-11 Digital circuitry Refer to Figure 4-5 for the following discussion on digital circuitry. The core digital circuitry uses a Motorola 68332 microcontroller running at 16.78MHz. The memory configuration includes two 256K X 8-bit EEPROMs and two 128K X 8-bit RAMs used in parallel to utilize the 16-bit data bus of the MPU.
  • Page 67 4-12 Troubleshooting Display board 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.

  • Page 68: Troubleshooting

    Troubleshooting 4-13 Troubleshooting Troubleshooting information for the various circuits is summarized below. See the component layout drawings at the end of Section 6 for test point locations. Display board checks If the front panel display tests indicate that there is a problem on the display board, use Table 4-1.

  • Page 69: Power Supply Checks

    4-14 Troubleshooting 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 Remarks Line fuse Check continuity. Remove to check.

  • Page 70: Troubleshooting

    Troubleshooting 4-15 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 Remarks Power-on test RAM OK, ROM OK. Verify that RAM and ROM are functional.

  • Page 71: Analog Circuitry Checks

    4-16 Troubleshooting Analog circuitry checks Table 4-4 summarizes analog circuitry checks. Table 4-4 Analog circuitry checks Item/ Step component Required condition Remarks TP200 >1100V voltage protection -13V ±1V TP201 SOURCE +10V -5V ±.5V TP202 SOURCE +10V (SVMI) -10V ±1V TP203 SOURCE +10V -10.5V ±1V TP213...

  • Page 72: Battery Replacement

    Troubleshooting 4-17 Battery replacement WARNING Disconnect the instrument from the power line and all other equipment before changing the battery. The volatile memories of the Model 2410 are protected by a replaceable battery when power is off. Typical life for the battery is approximately ten years, but the battery should be replaced if the voltage drops below 2.5V regardless of age.

  • Page 73: No Comm Link Error

    4-18 Troubleshooting 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 digital board. This error indicates that one of the main processor ROMs may require reseating in its socket. ROMs may be reseated as follows: Turn off the power, and disconnect the line cord and all other test leads and cables from the instrument.

  • Page 74: Disassembly

    Disassembly...

  • Page 75: Introduction

    Disassembly Introduction This section explains how to handle, clean, and disassemble the Model 2410. 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.

  • Page 76: Static Sensitive Devices

    Disassembly 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 2410.

  • Page 77: Assembly Drawings

    Disassembly Assembly drawings Use the assembly drawings located at the end of this section to assist you as you disassemble and re-assemble the Model 2410. Also, refer to these drawings for information about the Keithley part numbers of most mechanical parts in the unit. •...

  • Page 78: Case Cover Removal

    Disassembly Case cover removal Follow the steps below to remove the case cover to gain access to internal parts. WARNING Before removing the case cover, disconnect the line cord and any test leads from the instrument. Remove handle — The handle serves as an adjustable tiltbail. Adjust its position by gently pulling it away from the sides of the instrument case and swinging it up or down.

  • Page 79: Analog Board Removal

    Disassembly Analog board removal Perform the following steps to remove the analog board. This procedure assumes that the case cover is already removed. Disconnect the front and rear input terminals. You must disconnect these input terminal connections for both the front and rear inputs: •...

  • Page 80: Digital Board Removal

    Disassembly Digital board removal Perform the following steps to remove the digital board. This procedure assumes that the analog board assembly is already removed. Remove the IEEE-488, digital I/O, and RS-232 fasteners. The IEEE-488, digital I/O, and RS-232 connectors each have two nuts that secure the connectors to the rear panel.

  • Page 81: Front Panel Disassembly

    Disassembly Front panel disassembly Use the following steps to remove the display board and/or the pushbutton switch pad. Unplug the display board ribbon cable. 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.

  • Page 82: Removing Power Components

    Disassembly Removing power components The following procedures to remove the power supply and/or power module require that the case cover and motherboard be removed, as previously explained. Power supply removal Perform the following steps to remove the power supply: Remove the analog board. Unplug the two cables coming from the digital board.

  • Page 83: Instrument Re-Assembly

    5-10 Disassembly Instrument re-assembly Re-assemble 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.

  • Page 84: Replaceable Parts

    Replaceable Parts...

  • Page 85: Parts Lists

    Replaceable Parts Introduction This section contains replacement parts information and component layout drawings for the Model 2410. Parts lists The electrical parts lists for the Model 2410 are shown in 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.

  • Page 86: Factory Service

    Replaceable Parts Factory service If the instrument is to be returned to Keithley Instruments for repair, perform the following: • Call the Repair Department at 1-800-833-9200 for a Return Material Authorization (RMA) number. • Complete the service form at the back of this manual, and include it with the instrument. •...
  • Page 87 Replaceable Parts Table 6-1 Analog board parts list Circuit designation Description Keithley part no. C200-203, 205-210, 225, CAP, .1UF, 10%, 25V, CERAMIC C-495-.1 226, 231, 232, 237, 238 C204, 404, 608 ,609, CAP, .01UF, 10%, 50V CERAMIC C-491-.01 550-553 C211-214 CAP, 1000PF,10%, 50V, MONO CERAMIC C-452-1000P C215-222, 611 CAP,100PF, 5%, 100V, CERAMIC...
  • Page 88 Replaceable Parts Table 6-1 (cont.) Analog board parts list Circuit designation Description Keithley part no. C605-607, 613, 614, CAP, .1UF, 10%, 25V, CERAMIC C-495-.1 617-625, 650-652, 659, 660 C610, 612 CAP, 2200P, 10%, 100V CERAMIC C-430-2200P C616 CAP, 22UF, 20%, 25V, TANTALUM C-440-22 C661, 662, 524, 554, 555, CAP, .1UF, 10%, 25V, CERAMIC...
  • Page 89 Replaceable Parts Table 6-1 (cont.) Analog board parts list Circuit designation Description Keithley part no. Q220, 225 TRANS,NPN SILICON,MJE340 TG-209 Q221, 226 TRANS,PNP POWER,MJE350 TG-210 Q222, 224 TRANS, N-CHAN JFET, SST4393 TG-263 Q234-239, 244-246, 255, TRANS, N-MOSFET, VN0605T TG-243 256, 400, 401, 404, 229 Q242, 243 TRANS, N-CHAN MOSFET, 2SK1412 TG-276...
  • Page 90 Replaceable Parts Table 6-1 (cont.) Analog board parts list Circuit designation Description Keithley part no. R207 RES, 90.9K, 1%, 125mW, METAL FILM R-391-90.9K R210 RES, 768, 1%, 100MW, THICK FILM R-418-768 R213 RES NET 5K, .1%, 668A TF-243-5K R216, 318, 274-279, 319, RES, 20K, 1%, 100MW THICK FILM R-418-20K 345, 445...
  • Page 91 Replaceable Parts Table 6-1 (cont.) Analog board parts list Circuit designation Description Keithley part no. R349, 351 RES, 33.2K, 1%, 100MW, THICK FILM R-418-33.2K R358 RES, 3.65K, 1%, 100MW, THICK FILM R-418-3.65K R363 THICK FILM TF-257 R367, 424, 425, 426, 603, RES, 4.99K, 1%, 100MW THICK FILM R-418-4.99K 605, 484, 487...
  • Page 92 Replaceable Parts Table 6-1 (cont.) Analog board parts list Circuit designation Description Keithley part no. R509 RES, 18.7, 1%, 125mW, METAL FILM R-391-18.7 R516, 523 RES, 4.02K, 1%, 100MW,, THICK FILM R-418-4.02K R517, 539-541 RES, 12.1, 1%, 125MW METAL FILM R-391-12.1 R520 RES, 301, 1%, 100MW, THICK FILM...
  • Page 93 6-10 Replaceable Parts Table 6-1 (cont.) Analog board parts list Circuit designation Description Keithley part no. U204, 229 IC, 8-CHAN ANA MULTI- IC-844 PLEXER,DG408DY U205, 407 IC, HEX INVERTERS, 74HC400 IC-880 U209, 215 IC, QUAD COMPARATOR,LM339D IC-774 U210, 220 IC, DUAL BIPOLAR OP-AMP, LT1124CS8 IC-955 U211, 213 IC, BIFET OP AMP, AD712JR IC-834...
  • Page 94 Replaceable Parts 6-11 Table 6-1 (cont.) Analog board parts list Circuit designation Description Keithley part no. VR218, 219 DIODE, ZENER 30V BZX84C30 DZ-106-30 VR400, 401 DIODE, ZENER 4.7V, IN4732A DZ-67 VR403, 601, 604 DIODE, ZENER 3.3V, MMBZ5226BL DZ-94 VR404-406, 202, 203 DIODE,ZENER 5.1V, BZX84C5V1 DZ-88 VR500, 501...

  • Page 95: Digital Board Parts List

    6-12 Replaceable Parts Table 6-2 Digital board parts list Circuit designation Description Keithly part no. BATTERY BA-46 C1, 3 ,77, 11-14, 16, 17, 20, 22, CAP, .1UF, 10%, 25V, CERAMIC C-495-.1 23, 25, 26, 30, 40 C2, 56, 8, 76, 78, 80, 82, 89 CAP, .01UF, 10%, 50V CERAMIC C-491-.01 C4, 10...
  • Page 96 Replaceable Parts 6-13 Table 6-2 (cont.) Digital board parts list Circuit designation Description Keithly part no. RELAY, SURFACE MOUNT RL-188 FERRITE CHIP 600 OHM BLM32A07 CH-62 BEEPER, 5V, 30MA, QMX-05 EM-6 P1001 CABLE ASSEMBLY CA-152-1 P1003 CABLE ASSEMBLY CA-32-9B P1004, 1002 CABLE ASSEMBLY CA-62-4B Q1-6...
  • Page 97 6-14 Replaceable Parts Table 6-2 (cont.) Digital board parts list Circuit designation Description Keithly part no. IC,OCTAL INTER BUS TRANS,75161 IC-647 IC, 4-CHANNEL PWR DRIVER, 2549B IC-1044 IC, NEG VOLTAGE REG -15V, 500MA, 79M15 IC, HEX INVERTERS, 74HCT04 IC-880 IC, VOLT COMPARATOR LM393D IC-775 U12, 14 LARGE SCALE IC...

  • Page 98: Display Board Parts List

    Replaceable Parts 6-15 Table 6-3 Display board parts list Circuit designation Description Keithley part no. C901 CAP, 22UF, 20%, 6.3, TANTALUM C-417-22 C902, 904, 907, 908, 910 CAP, .1UF, 20%,100V, CERAMIC C-436-.1 C903, 905, 906, 909, 911 CAP,.1UF, 20%,50V, CERAMIC C-418-.1 C912 CAP, 2.2UF, 20%,100V, ALUM ELEC...

  • Page 99: Mechanical Parts List

    6-16 Replaceable Parts Table 6-4 Mechanical parts list Quantity Decription Keithley part no. BANANA JACK, PUSH-IN, BLACK BJ-13-0 BANANA JACK, PUSH-IN, BLUE BJ-13-6 BANANA JACK, PUSH-IN, RED BJ-13-2 BANANA JACK, PUSH-IN, WHITE BJ-13-9 BEZEL, REAR 428-303D BOTTOM SHIELD 2400-309A CHOKE CH-58-1A COVER 2400-317B...
  • Page 100 Specifications...

  • Page 101: Accuracy Calculations

    Specifications Accuracy calculations The information below discusses how to calculate accuracy for both measurement and source functions. Measurement accuracy Measurement accuracy is calculated as follows: Accuracy = ±(% of reading + offset) As an example of how to calculate the actual reading limits, assume that you are measuring 10V on the 20V range.

  • Page 102: Command Reference Introduction

    Command Reference...

  • Page 103: Command Summary

    Command Reference Introduction This appendix contains detailed information on the various Model 2410 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 2410 calibration commands.

  • Page 104: Miscellaneous Commands

    Command Reference Miscellaneous commands Miscellaneous commands are those commands that perform such functions as saving calibration constants, locking out calibration, and programming date parameters. :CODE (:CALibration:PROTected:CODE) Purpose To unlock calibration so the calibration procedures can be performed. Format :cal:prot:code '<password>' Parameters Up to an 8-character string including letters and numbers.
  • Page 105 Command Reference :LOCK (:CALibration:PROTected:LOCK) Purpose To lock out calibration. Format :cal:prot:lock Query :cal:prot:lock? Response Calibration unlocked Calibration locked Description The :LOCK command lets you lock out comprehensive calibration after completing those procedures. Thus, :LOCK performs the opposite of sending the password with the :CODE command. The :LOCK? query returns calibration lock status.
  • Page 106 Command Reference :DATE (:CALibration:PROTected:DATE) Purpose To program the calibration date. Format :cal:prot:date <year>, <month>, <day> Parameters <year> = 1996 to 2095 <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.
  • Page 107 Command Reference :SENSe (:CALibration:PROTected:SENSe) Purpose To calibrate the sense function. Format :cal:prot:sens <nrf> Parameters See Table B-2 for recommended parameter ranges for optimum calibration. Description The :CAL:PROT:SENS command calibrates the Model 2410 sense function. To use this command, you must (1) program the source to the correct value, (2) select the range being calibrated, and (3) send the :CAL:PROT:SENS command for each parameter listed in Table B-2.

  • Page 108: Recommended :Calibration:protected:sense

    Command Reference Table B-2 Recommended :CALibration:PROTected:SENSe parameter ranges Sense First parameter Second parameter Third parameter range (zero) (negative full scale) (positive full scale) 0.2V -0.002 to +0.002 -0.18 to -0.22 +0.18 to +0.22 +1.8 to +2.2 -0.02 to +0.02 -1.8 to -2.2 -0.2 to +0.2 -18 to -22 +18 to +22...
  • Page 109 Command Reference :SOURce (:CALibration:PROTected:SOURce) Purpose To calibrate the source function. Format :cal:prot:sour <nrf> Parameters See Table B-3 for recommended parameter ranges. Description The :CAL:PROT:SOUR command calibrates the Model 2410 source function. To use this command, you must (1) program the source to the correct value, (2) select the range being calibrated, and (3) send the :CAL:PROT:SOUR command for each parameter listed in Table B-3.

  • Page 110: Recommended :Calibration:protected:source

    Command Reference Table B-3 Recommended :CALibration:PROTected:SOURce parameter ranges Second Source First parameter Third parameter Fourth parameter parameter range (negative full scale) (positive full scale) (positive zero) (negative zero) 0.2V -0.18 to -0.22 -0.002 to +0.002 +0.18 to +0.22 -0.002 to +0.002 -1.8 to -2.2 -0.02 to +0.02 +1.8 to +2.2...
  • Page 111 B-10 Command Reference :DATA? (:CALibration:PROTected:SENSe:DATA?) (:CALibration:PROTected:SOURce:DATA?) Purpose To request the calibration constants for the active range. Format :cal:prot:sens:data? :cal:prot:sour:data? Response Four comma-separated ASCII floating-point constants. Description The :CAL:PROT:SENS:DATA? and :CAL:PROT:SOUR:DATA? queries request the calibration constants for the active range of the sense and source functions respectively.

  • Page 112: Detecting Calibration Errors

    Command Reference B-11 Detecting calibration errors If an error occurs during any calibration step, the Model 2410 will generate an appropriate error message. Several methods to detect calibration errors are discussed below. Reading the error queue As with other Model 2410 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-4 summarizes calibration errors.

  • Page 113: Calibration Errors

    B-12 Command Reference Table B-4 Calibration errors Error Error message number +500 "Date of calibration not set" +501 "Next date of calibration not set" +502 "Calibration data invalid" +503 "DAC calibration overflow" +504 "DAC calibration underflow" +505 "Source offset data invalid" +506 "Source gain data invalid"...

  • Page 114: Detecting Calibration Step Completion

    Command Reference B-13 Detecting calibration step completion When sending remote calibration commands, you must wait until the instrument completes the present 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 out- put queue when it has completed each step.
  • Page 115 B-14 Command Reference 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 2410. To use this method, send both *ESE 1 and *SRE 32 to the instrument, and then include the *OPC command at the end of each calibration command line, as previously described.

  • Page 116: Calibration Programs Introduction

    Calibration Programs...

  • Page 117: Computer Hardware Requirements

    Calibration Programs Introduction This appendix includes a calibration program written in BASIC to help you calibrate the Model 2410, as well as an example program that demonstrates how to request calibration constants. Refer to Section 2 for more details on calibration procedures, equipment, and connections.

  • Page 118: Calibration Equipment

    Calibration Programs Calibration equipment The following calibration equipment is required: • Hewlett-Packard HP3458A Digital Multimeter See Section 2 for detailed equipment specifications. General program instructions With the power off, connect the Model 2410 and the digital multimeter to the IEEE-488 interface of the computer.
  • Page 119 Calibration Programs Program C-1. Model 2410 calibration program ' Model 2410 calibration program for use with the HP3458A Digital Multimeter. ' Rev. 1.0, 11/1/96 ' 2410 primary address = 24. HP3458A primary address = 22. OPEN "IEEE" FOR OUTPUT AS #1 ' Open IEEE-488 output path.
  • Page 120 Calibration Programs CASE 3, 4, 6, 7, 9, 10, 12 PRINT #1, "OUTPUT 24;"; Cmd$; Reading$; ";*OPC" GOSUB ErrCheck GOSUB CalEnd CASE 5, 11 PRINT #1, "OUTPUT 24;"; Cmd$ GOSUB ReadDMM CASE 8 PRINT #1, "OUTPUT 24;"; Cmd$; Source GOSUB ReadDMM END SELECT NEXT I Range = Range * 10: Source = Range...
  • Page 121 Calibration Programs ErrCheck: ' Error check routine. PRINT #1, "OUTPUT 24;:SYST:ERR?" ' Query error queue. PRINT #1, "ENTER 24" INPUT #2, E, Err$ IF E <> 0 THEN PRINT Err$: GOTO EndProg ' Display error. RETURN ReadDMM: ' Get reading from DMM. SLEEP 5 PRINT #1, "ENTER 22"...

  • Page 122: Requesting Calibration Constants

    Calibration Programs Requesting calibration contants Program C-2 listed below demonstrates how to request the calibration constants from the Model 2410. The program requests and displays the calibration constants for all ranges of both the volts and current source and measurement functions. Program C-2.
  • Page 123 Calibration Programs PRINT Data$ PRINT #1, "OUTPUT 24;:CAL:PROT:SOUR:DATA?" PRINT #1, "ENTER 24" LINE INPUT #2, Data$ PRINT Data$ Range = Range * 10 IF Range > .009 AND Range < .011 THEN Range = .02 IF Range > .19 AND Range < .21 THEN Range = .1 LOOP WHILE Range <= 1 PRINT #1, "OUTPUT 24;:CAL:PROT:LOCK"...
  • Page 124 Index Accuracy calculations A-2 Line fuse replacement 3-2 Analog board removal 5-6 Analog circuitry checks 4-16 Assembly drawings 5-4 Miscellaneous commands B-3 No comm link error 4-18 Battery replacement 4-17 Ordering information 6-2 Calibration 2-1 Output current accuracy 1-14 Calibration considerations 2-4 Output voltage accuracy 1-11 Calibration equipment C-3 Calibration programs C-1...
  • Page 125 Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments. All other trademarks and trade names are the property of their respective companies. Keithley Instruments Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • 1-800-833-9200 • www.tek.com/keithley 12/15...

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