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Keithley 2010 Service Manual

Multimeter
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Model 2010 Multimeter
Service Manual
2010-902-01 Rev. D / October 2003
A
G R E A T E R
M E A S U R E
O F
C O N F I D E N C E

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Summary of Contents for Keithley 2010

  • Page 1 Model 2010 Multimeter Service Manual 2010-902-01 Rev. D / October 2003 G R E A T E R M E A S U R E C O N F I D E N C E...
  • Page 2 Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, software, rechargeable batteries, diskettes, and documentation. During the warranty period, Keithley Instruments will, at its option, either repair or replace any product that proves to be defective.
  • Page 3 Model 2010 Multimeter Service Manual ©1996, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Fourth Printing, October 2003 Document Number: 2010-902-01 Rev. D...
  • Page 4 Revision C (Document Number 2010-902-01) ............September 1999 Revision D (Document Number 2010-902-01) ............October 2003 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.

  • Page 5: Safety Precautions

    Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained service personnel may perform installation and service procedures. Keithley Instruments products are designed for use with electrical signals that are rated Measurement Category I and Measurement Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664.
  • Page 6 (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.

  • Page 7: Table Of Contents

    Table of Contents Performance Verification Introduction ................Verification test requirements ............ Environmental conditions ........... Warm-up period ..............Line power ................Recommended test equipment ..........Verification limits ............... Restoring factory defaults ........... Performing the verification test procedures ....... Test summary ..............Test considerations ..............
  • Page 8 Front panel calibration ..............Preparing the Model 2010 for calibration ......Front panel short and open calibration ........ DC volts calibration ............Resistance calibration ............DC current calibration ............2-10 AC voltage calibration ............2-11 AC current calibration ............2-12 Setting calibration dates ............
  • Page 9 Troubleshooting Introduction ................Repair considerations ..............Power-on self-test ..............Front panel tests ................. KEY test ................DISP test ................Principles of operation ............... Power supply ............... Display board ..............Digital circuitry ..............Analog circuitry ..............Troubleshooting ............... 4-10 Display board checks ............4-10 Power supply checks ............
  • Page 10 Specifications Accuracy calculations ..............Calculating DC characteristics accuracy ......Calculating AC characteristics accuracy ......Additional derating factors ..........Calibration Command Reference Introduction ................Command summary ..............Miscellaneous calibration commands ........DC calibration commands ............AC calibration commands ............B-12 Manufacturing calibration commands ........B-14 Remote error reporting ............
  • Page 11 List of Illustrations Performance Verification Figure 1-1 Connections for DC volts verification ............. Figure 1-2 Connections for AC volts verification ............. Figure 1-3 Connections for DC current verification ..........Figure 1-4 Connections for AC current verification ..........Figure 1-5 Connections for resistance verification (10Ω-10MΩ ranges) ....1-10 Figure 1-6 Connections for resistance verification (100MΩ...
  • Page 12 List of Tables Performance Verification Table 1-1 Recommended verification equipment ............ Table 1-2 DCV reading limits .................. Table 1-3 ACV reading limits .................. Table 1-4 DCI limits ....................Table 1-5 ACI limits ....................Table 1-6 Limits for resistance verification ............1-11 Table 1-7 Thermocouple temperature verification reading limits ......
  • Page 13 Ω2/Ω4 reference switching ..............Table 4-9 4-15 Table 4-10 DCA signal switching ................4-15 Table 4-11 ACA signal switching ................4-15 Table 4-12 DCV signal multiplexing and gain ............4-16 Table 4-13 ACV and ACA signal multiplexing and gain ........4-16 Table 4-14 DCA signal multiplexing and gain ............
  • Page 14 Performance Verification Performance Verification...

  • Page 15: Introduction

    Performance Verification Introduction Use the procedures in this section to verify that the Model 2010 Multimeter accuracy is within the limits stated in the instrument’s one-year accuracy specifications. You can perform verification procedures: • When you first receive the instrument to make sure that it was not damaged during shipment, and that the unit meets factory specifications.

  • Page 16: Line Power

    Also, allow the test equipment to warm up for the minimum time specified by the manufacturer. Line power The Model 2010 Multimeter requires a line voltage of 100V/120V/220V/240V, ±10% and a line frequency of 45Hz to 66Hz and 360Hz to 440Hz. Recommended test equipment Table 1-1 summarizes recommended verification equipment.

  • Page 17: Verification Limits

    The following is an example of how reading limits have been calculated: Assume you are testing the 10V DC range using a 10V input value. Using the Model 2010 one-year accuracy specification for 10V DC of ± (24ppm of reading + 4ppm of range), the calculated limits are: Reading limits = 10V ±...

  • Page 18: Performing The Verification Test Procedures

    Do not use autoranging for any verification tests because autorange hysteresis may cause the Model 2010 to be on an incorrect range. For each test signal, you must manually set the correct range for the Model 2010 using the range keys.

  • Page 19: Verifying Dc Voltage

    Note : Use shielded, low-thermal cables for 100mV and 1V ranges. Select the DC volts function by pressing the DCV key, and set the Model 2010 to the 100mV range. Set the calibrator output to 0.00000mV DC, and allow the reading to settle.

  • Page 20: Verifying Ac Voltage

    Verifying AC voltage Check AC voltage accuracy by applying accurate AC voltages at specific frequencies from the AC voltage calibrator to the Model 2010 inputs and verifying that the displayed readings fall within specified ranges. Do not exceed 1000V peak between INPUT HI and INPUT LO, or 8 × 10 CAUTION V•Hz input, because instrument damage may occur.

  • Page 21: Verifying Dc Current

    Check DC current accuracy by applying accurate DC currents from the DC current calibrator to the AMPS input of the Model 2010 and verifying that the displayed readings fall within specified limits. Follow these steps to verify DC current accuracy:...

  • Page 22: Verifying Ac Current

    Verifying AC current Check AC current accuracy by applying accurate AC current at specific frequencies from the AC current calibrator to the Model 2010 input and verifying that the displayed readings fall within specified limits. Follow these steps to verify AC current:...

  • Page 23: Verifying Resistance

    Set the calibrator for 4-wire resistance with external sense on. Select the Model 2010 4-wire resistance function by pressing the Ω4 key. Set the Model 2010 for the 10Ω range, and make sure the FILTER is on. Set the calibrator output to 0Ω, then enable Model 2010 REL.

  • Page 24: Figure 1-6 Connections For Resistance Verification (100Mω Range)

    100MΩ 99.84960 to 100.15040MΩ ______________ to_____________ MΩ * See verification limits. Connect the Model 2010 INPUT and SENSE jacks to the calibrator as shown in Figure 1-6. Disable external sense on the calibrator. Set the Model 2010 for the 100MΩ range.

  • Page 25: Verifying Temperature

    (Use 2-wire connections similar to those shown Figure 1-1.) Configure the Model 2010 for °C units, type J temperature sensor, and 0°C simulated reference junction as follows: A. Press SHIFT then SENSOR, and note the unit displays the temperature units: UNITS: C.

  • Page 26: Rtd Temperature

    INPUT and SENSE jacks using 4-wire connections. (See Figure 1-1 for a similar connecting scheme.) Configure the Model 2010 temperature function for °C units and RTD temperature sensor (α=0.00385) as follows: A. Press SHIFT then SENSOR, and note the unit displays the temperature units: UNITS: C.

  • Page 27: Verifying Frequency

    LO will cause instrument damage. Connect SENSE HI to INPUT HI, and connect SENSE LO to INPUT LO. Connect the DC calibrator output HI and LO terminals to the Model 2010 HI and LO terminals respectively, as shown in Figure 1-8.

  • Page 28: Calibration

    Calibration Calibration...

  • Page 29: Introduction

    A relative humidity of less than 80% unless otherwise noted Warm-up period Allow the Model 2010 Multimeter to warm up for at least two hours before performing calibration. If the instrument has been subjected to temperature extremes (those outside the ranges stated in the above section), allow extra time for the instrument’s internal temperature to stabilize.

  • Page 30: Calibration Considerations

    • Always let the source signal settle before calibrating each point. • Do not connect test equipment to the Model 2010 through a scanner or other switching equipment. • If an error occurs during calibration, the Model 2010 will generate an appropriate error message.

  • Page 31: Remote Command Code

    Calibration The Model 2010 lets you define a new calibration code. Use the up and down range keys to toggle between yes and no. Choose N if you do not want to change the code. Choose Y if you want to change the code. The unit then prompts you to enter a new code. Enter the code, and press ENTER.

  • Page 32: Recommended Equipment

    ABORT CAL? Press EXIT to abort calibration at this point, or press any other key to return to the calibration process. NOTE The Model 2010 will not respond to any remote programming commands while the ABORT CAL? message is displayed.

  • Page 33: Front Panel Calibration

    • Setting calibration dates Preparing the Model 2010 for calibration Turn on the Model 2010, and allow it to warm up for at least two hours before performing calibration procedure. Start the calibration process as follows: A. Access the calibration menu by pressing SHIFT then CAL.

  • Page 34: Front Panel Short And Open Calibration

    Calibration Front panel short and open calibration At the Model 2010 prompt for a front panel short, perform the following: Connect the Model 8610 low-thermal short to the instrument front panel INPUT and SENSE terminals as shown in Figure 2-1. Make sure the INPUTS button is not pressed in so that the front inputs are selected.

  • Page 35: Dc Volts Calibration

    Set the calibrator to the indicated value, and make sure it is in operate. • Press the ENTER key to calibrate that step. • Wait until the Model 2010 finishes each step. The unit will display the CALIBRATING message while calibrating.

  • Page 36: Resistance Calibration

    If your calibrator cannot output the values recommended in Table 2-3, use the left and right arrow keys, and the up and down range keys to set the Model 2010 display value to match the calibrator output voltage. Table 2-3...

  • Page 37: Dc Current Calibration

    After the 1MΩ resistance point has been calibrated, the unit will prompt you for 10mA. Follow these steps for DC current calibration: Connect the calibrator to the AMPS and INPUT LO terminals of the Model 2010 as shown in Figure 2-3.

  • Page 38: Ac Voltage Calibration

    Calibration 2-11 AC voltage calibration Follow these steps for AC voltage calibration: Connect the calibrator to the Model 2010 INPUT HI and LO terminals as shown in Figure 2-4. Figure 2-4 5700A Calibrator Connections for AC volts calibration Input HI...

  • Page 39: Ac Current Calibration

    After the 700V AC at 1kHz point has been calibrated, the unit will prompt you for 100mA at 1kHz. Follow these steps for AC current calibration: Connect the calibrator to the AMPS and INPUT LO terminals of the Model 2010 as shown in Figure 2-3.

  • Page 40: Remote Calibration

    See Appendix B for a detailed list and description of SCPI calibration commands. When sending calibration commands, be sure that the Model 2010 completes each step before sending the next command. You can do so by observing the front panel CALIBRATING message or by detecting the completion of each step over the bus.

  • Page 41: Preparing The Model 2010 For Calibration

    Select the DCV function, and choose SLOW as the rate (integration time = 5PLC). Make sure the primary address of the Model 2010 is the same as the address specified in the program that you will be using to send commands. Use the GPIB key.

  • Page 42: Dc Volts Calibration

    Calibration 2-15 DC volts calibration After front panel short and open steps, perform the following: Connect the calibrator to the Model 2010 as shown in Figure 2-2. Allow three minutes for thermal equilibrium. NOTE Although 4-wire connections are shown, the sense leads are connected and disconnected at various points in this procedure by turning calibrator external sense on or off as appropriate.

  • Page 43: Resistance Calibration

    (Use the recommended resistance or the closest available value.) • Send the indicated programming command. (Change the command parameter if you are using a different calibration resistance than that shown.) • Wait until the Model 2010 completes each step before continuing. Table 2-9 Resistance calibration programming steps...

  • Page 44: Dc Current Calibration

    2-17 DC current calibration After the 1MΩ resistance point has been calibrated, follow these steps for DC current calibration: Connect the calibrator to the AMPS and INPUT LO terminals of the Model 2010 as shown in Figure 2-3. Perform the calibration steps listed in Table 2-10.

  • Page 45: Ac Voltage Calibration

    2-18 Calibration AC voltage calibration Follow these steps for AC voltage calibration: Connect the calibrator to the Model 2010 INPUT HI and LO terminals as shown in Figure 2-4. NOTE Disconnect any sense leads from the calibrator to the Model 2010 when calibrating or verifying AC volts.

  • Page 46: Programming Calibration Dates

    Calibration 2-19 Table 2-12 AC current calibration programming steps Calibration step Calibrator current, frequency Calibration command 100mA at 1kHz 100.0000mA, 1kHz :CAL:PROT:AC:STEP11 1A at 1kHz 1.000000A, 1kHz :CAL:PROT:AC:STEP12 2A at 1kHz 2.000000A, 1kHz :CAL:PROT:AC:STEP13 Programming calibration dates Program the present calibration date and calibration due date by sending the following commands: :CAL:PROT:DATE <year>, <month>, <day>...

  • Page 47: Manufacturing Calibration

    Stanford Research Systems DS 345 Function Generator: 1V RMS, 3Hz, ±5ppm 1V RMS, 1kHz, ±5ppm 1V RMS, 1kHz, ±5ppm Keithley Model 2001 or 2002 Digital Multimeter: Fluke 5700A Calibrator: 1V, 3Hz AC, ±0.13% 1V RMS, 10Hz, ±260ppm Keithley Model 8610 Low-thermal short...

  • Page 48: Test Equipment Connections

    Refer to the test procedures for specific steps. Figure 2-5 Calibrator connections for manufacturing calibration (firmware revision A14 and higher) AC Voltage Calibrator Input HI Model 2010 SENSE Output HI Ω 4 WIRE INPUT STEP SCAN...

  • Page 49: Unlocking Manufacturing Calibration

    A13 and lower. Figure 2-7 Synthesizer connections for manufacturing calibration (firmware revision A13 and lower) BNC-to-Dual Model 3930A or 3940 Synthesizer Banana Plug Adapter Model 2010 Main SENSE Ω 4 WIRE INPUT Function STEP SCAN...

  • Page 50: Table 2-14 1V, 10Hz Frequency Errors

    Calibration 2-23 After the last AC current calibration step, the instrument will prompt you to enter 10Hz at 1V RMS and 1kHz with the following prompts: • Low-frequency cal: Connect the calibrator to the front panel INPUT jacks (Figure 2-5). Select the front input jacks with the INPUTS switch. Set the calibrator to output a 1V RMS, 10Hz sine wave.

  • Page 51: Calibration For Firmware Revision A13 And Lower

    Perform the entire front panel comprehensive calibration procedure discussed earlier in this section. (See “Comprehensive calibration” earlier in this section.) Connect the synthesizer to the Model 2010 front panel INPUT jacks as shown in Figure 2-7. Select the front input jacks with the INPUTS switch.After the last AC current...
  • Page 52 :CAL:PROT:DC:STEP0 Perform the entire remote comprehensive calibration procedure discussed earlier in this section. (See “Comprehensive calibration” earlier in this section.) Connect the synthesizer to the Model 2010 INPUT jacks as shown in Figure 2-7. Select the front input jacks with the INPUTS switch.

  • Page 53: Routine Maintenance

    Routine Maintenance Routine Maintenance...

  • Page 54: Introduction

    Figure 3-1). Gently push in and turn to the left. Release pressure on the assembly, and its internal spring will push it out of the power module. Figure 3-1 Model 2010 Power module WARNING: WARNING: NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

  • Page 55: Replacing The Amps Fuse

    Release pressure on the jack, and its internal spring will push the fuse carrier out of the socket. Remove the fuse, and replace it with the same type: 3A, 250V, fast blow, Keithley part number FU-99-1.

  • Page 56: Troubleshooting

    Troubleshoot- Troubleshooting...

  • Page 57: Introduction

    Troubleshooting Introduction This section of the manual will assist you in troubleshooting and repairing the Model 2010. Included are self-tests, test procedures, troubleshooting tables, and circuit descriptions. It is left to the discretion of the repair technician to select the appropriate tests and documentation needed to troubleshoot the instrument.

  • Page 58: Front Panel Tests

    Troubleshooting Front panel tests There are two front panel tests: one to test the functionality of the front panel keys and one 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: 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 block diagrams: Figure 4-1 — Power supply block diagram Figure 4-2 — Digital circuitry block diagram Figure 4-3 —...
  • Page 60 Troubleshooting Figure 4-1 +5VD CR104 Power supply block diagram C175, C156 U144 D Common +37V CR116, CR117 C108 U101 D Common Line Power Power Fuse Voltage Switch Transformer Switch +15V CR102 C131, C148 A Common U179, U180 -15V +5V, +5VRL CR103 C146 U124...

  • Page 61: Display Board

    Troubleshooting Display board Display board components are shown in the digital circuitry block diagram in Figure 4-2. Microcontroller U401 is the display board microcontroller that controls the display and interprets key data. The microcontroller uses three internal peripheral I/O ports for the various control and read functions.
  • Page 62 Troubleshooting Figure 4-2 Digital circuitry block NVRAM U151, U152 diagram U156, U157 U136 Keypad XADTX ADTX Analog XADCLK ADCLK Display Board 68306 Display Circuitry µP Controller XADTS ADTS DS401 U401 U135 (See Figure 4-3) XADRX ADRXB AT101 U150 XTAL U155 Y101 Scan Control RS-232...

  • Page 63: Analog Circuitry

    Troubleshooting Trigger circuits Buffering for Trigger Link input and output is performed by U146. Trigger input and output is controlled by the IRQ4 and PB3 lines of the MPU. U164 provides additional logic for the trigger input to minimize MPU control overhead. At the factory, trigger output is connected to line 1 of the Trigger Link connector (resistor R267 installed).
  • Page 64 Troubleshooting AMPS input The ACA or DCA input signal is applied to the Current Shunt circuit, which is made up of K103, Q165, Q164, R205, R450, R386, and R158. U178 controls if either Q164 or Q165 is turned on. For the 3A and 1A DCA ranges and all ACA ranges, 0.1Ω (R158) is shunted across the input (K103 off).

  • Page 65: Troubleshooting

    4-10 Troubleshooting Troubleshooting Troubleshooting information for the various circuits is summarized below. See Analog signal switching states for additional information regarding the analog circuitry. Display board checks If the front panel DISP test indicates that there is a problem on the display board, use Table 4-2.

  • Page 66: Power Supply Checks

    Troubleshooting 4-11 Power supply checks Power supply problems can be checked using Table 4-3. See Principles of operation for circuit theory on the power supply. Table 4-3 Power supply checks Step Item/component Required condition Remarks Check continuity. Remove to check. Line fuse Line voltage 120V/240V as required.

  • Page 67: Digital Circuitry Checks

    4-12 Troubleshooting Digital circuitry checks Digital circuit problems can be checked using Table 4-4. See Principles of operation for a digital circuit description. Table 4-4 Digital circuitry checks Step Item/component Required condition Remarks RAM OK, ROM OK. Verify that RAM and ROM are functional. Power-on test U157 pin 16 Digital common.

  • Page 68: Analog Signal Switching States

    Troubleshooting 4-13 Analog signal switching states Table 4-5 through Table 4-11 provide switching states of the various relays, FETs, and analog switches for the basic measurement functions and ranges. These tables can be used to assist in tracing an analog signal from the input to the A/D multiplexer. Table 4-5 DCV signal switching Range...
  • Page 69 4-14 Troubleshooting Table 4-7 Ω 2 signal switching Range K104 Q101 Q102 Q114 Q136 Q109 K101* K102* Q113 Q105 Q104 Q108 Q153 Q167 10Ω RESET RESET 100Ω RESET RESET 1kΩ RESET RESET 10kΩ RESET RESET 100kΩ RESET RESET 1MΩ RESET RESET 10MΩ...

  • Page 70: Table 4-9 Ω2/Ω4 Reference Switching

    Troubleshooting 4-15 Table 4-9 Ω 2/ Ω 4 reference switching Range U133 pin 8 U133 pin 1 Q123 Q125 Q124 Q126 10Ω 100Ω 1kΩ 10kΩ 100kΩ 1MΩ 10MΩ 100MΩ circuit 10Ω 100Ω Table 4-10 DCA signal switching Range K103 Q165 Q164 10mA 100mA...

  • Page 71: Table 4-12 Dcv Signal Multiplexing And Gain

    4-16 Troubleshooting Table 4-12 through Table 4-16 can be used to trace the analog signal through the A/D multi- plexer (U163) to the final amplifier stage. These tables show the MUX lines (S3, S4, S6, S7) that are selected for measurement during the SIGNAL phase of the multiplexing cycle. Also included are switching states of analog switches (U176) that set up the gain for the final amplifier stage (U177).

  • Page 72: Table 4-15 Ω2 Signal Multiplexing And Gain

    Troubleshooting 4-17 Table 4-15 Ω 2 signal multiplexing and gain Signal U176 U176 U176 Gain U176 Range (U163) pin 1 pin 8 pin 9 (U177) pin 16 10Ω X100 100Ω X100 1kΩ 10kΩ 100kΩ 1MΩ 10MΩ 100MΩ Table 4-16 Ω 4 signal multiplexing and gain Signal U176 U176...

  • 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 ceased communication with the main processor, which is located on the mother board. This error indicates that there may be a problem with the cable connection from the front panel display or one of the main processor ROMs may require re-seating in its socket.

  • Page 74: Disassembly

    Disassembly Disassembly...

  • Page 75: Introduction

    Disassembly Introduction This section explains how to handle, clean, and disassemble the Model 2010 Multimeter. 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

    Use the following assembly drawings to assist you as you disassemble and re-assemble the Model 2010. Also, refer to these drawings for information about the Keithley part numbers of most mechanical parts in the unit. The drawings are located at the end of this section.

  • Page 77: Case Cover Removal

    Changing trigger link lines The Model 2010 uses two lines of the Trigger Link rear panel connector as External Trigger (EXT TRIG) input and Voltmeter Complete (VMC) output. At the factory, line 1 is configured as VMC and line 2 as EXT TRIG.

  • Page 78: Motherboard Removal

    Disassembly Remove the cover from the instrument as explained in Case cover removal. The resistors used to select the trigger link lines are located next to the Trigger Link connector as shown in Figure 5-1. The “resistors” are actually solder beads that bridge pc-board pads.

  • Page 79: Front Panel Disassembly

    Disassembly Remove all the connections except the front AMPS connection by pulling the wires off the pin connectors. To remove the front panel AMPS input wire (white), first remove the AMPS fuse holder, and then use needle-nose pliers to grasp the AMP wire near fuse housing. Push the wire forward and down to snap the spring out of the fuse housing.

  • Page 80: Main Cpu Firmware Replacement

    Disassembly 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. Main CPU firmware replacement Changing the firmware may be necessary as upgrades become available.

  • Page 81: Removing Power Components

    Perform the following steps to remove the power transformer: Remove motherboard. Unplug the transformer wires that attach to the power module at the rear panel. During re-assembly, use drawing 2010-050 as a reference and replace the wires as follows: Top wire:...

  • Page 82: Instrument Re-Assembly

    Disassembly 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. WARNING To avoid electrical shock, which could result in injury or death, the ground wire of the power module must be connected to chassis ground.
  • Page 83 CONFIDENTIAL PROPRIETARY...

  • Page 87: Replaceable Parts

    Replaceable Parts Replaceable Parts...

  • Page 88: Introduction

    Model 2010. Parts lists The electrical parts lists for the Model 2010 are shown in Tables 4-1 to 4-3. 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 and...

  • Page 89: Table 6-1 Mother Board Parts List

    Replaceable Parts Table 6-1 Mother board parts list Circuit desig. Description Keithley part no. AT101 IC, DUAL HIGH CMR/SPEED OPTO, HCPL-2631 IC-588 C101,103,111,116,118,122,124, CAP, .1UF, 10%, 25V, CERAMIC C-495-.1 128,133,135,136,138,139,142, 149,152,153,159-163,167-170, 173,174,178,180,183,186,187, 190,193,197,198,201-208,210, 212-218,221,223,225,227,230, 232,233,249,250,290,299 C102 CAP, .01UF, 10%,1000V,CERAMIC C-64-.01...
  • Page 90 Replaceable Parts Table 6-1 (cont.) Mother board parts list Circuit desig. Description Keithley part no. C296,297 CAP, 47UF, ±20%, 25V, ALUM ELEC C-314-47 C298 CAP, 100PF, 2.5%, 630V, POLYPROPYLENE C-405-100P C306,307 CAP, 680PF, 10%, 1000V, CERAMIC C-64-680P CR102,103 DIODE, BRIDGE, VM18...
  • Page 91 Replaceable Parts Table 6-1 (cont.) Mother board parts list Circuit desig. Description Keithley part no. Q125 TRANS, SELECTED TG-128 31841A Q129,141,166,172 TRANS, PNP, MMBT3906L TG-244 Q137,138 SELECTION, TG-225 182-600B Q140,188 TRANS, N-CHAN JFET, SST4393 TG-263 Q142,148 TRANS, NPN COMP SILICON AMP, MPS8099...
  • Page 92 Replaceable Parts Table 6-1 (cont.) Mother board parts list Circuit desig. Description Keithley part no. R147 RES, 732K, 1%, 100MW, THICK FILM R-418-732K R153 RES NET, 3.6K MICRO DIVIDER TF-246-1 R155,169,339,387,388,427 RES, 4.99K, 1%, 100MW, THICK FILM R-418-4.99K R157,342 RES, 511, 1%, 100MW, THICK FILM...
  • Page 93 Replaceable Parts Table 6-1 (cont.) Mother board parts list Circuit desig. Description Keithley part no. R331 RES, 1.8M, 5%, 125MW, METAL FILM R-375-1.8M R332,365 RES, 499, 1%, 125MW, METAL FILM R-391-499 R333,334,336 RES, 2.49K, 1%, 125MW, METAL FILM R-391-2.49K R335,400...
  • Page 94 Replaceable Parts Table 6-1 (cont.) Mother board parts list Circuit desig. Description Keithley part no. U114,168,173 IC, DUAL J-FET OP-AMP, OP-282GS IC-968 U115,120 IC, QUAD COMPARATOR, LM339D IC-774 U116 IC, DARLINGTON ARRAY, ULN2003L IC-969 U117,145 IC, VOLT. COMPARATOR, LM311M IC-776...
  • Page 95 Replaceable Parts Table 6-1 (cont.) Mother board parts list Circuit desig. Description Keithley part no. VR103,104 DIODE, ZENER, 6.8V, MMSZ5235BT1 DZ-100 VR105,106 DIODE, ZENER, 11V, MMSZ11T1 DZ-103 VR112,113 DIODE, ZENER, 6.2V, MMSZ6V2 DZ-97 VR115,121 DIODE, ZENER, 5.1V, BZX84C5V1 DZ-88 VR116,119 DIODE, ZENER, 3.3V, MMBZ5226BL...

  • Page 96: Table 6-2 Display Board Parts List

    6-10 Replaceable Parts Table 6-2 Display board parts list Circuit desig. Description Keithley part no. C413 CAP, 22UF, 20%, 6.3, TANTALUM C-417-22 C401,402,411 CAP, .1UF, 20%, 50V, CERAMIC C-418-.1 C406,408 CAP, 33PF, 10%, 100V, CERAMIC C-451-33P C414 CAP, 47PF, 10%, 100V, CERAMIC...

  • Page 97: Table 6-4 Mechanical Parts List

    Replaceable Parts 6-11 Table 6-4 Mechanical parts list Description Keithley part no. BANANA JACK, PUSH-IN, BLACK BJ-13-0 BANANA JACK, PUSH-IN, RED BJ-13-2 BEZEL, REAR 428-303D CARD GUIDE/SHIELD 2000-311A CHASSIS 2000-305 CHASSIS ASSEMBLY 2000-309F CHASSIS ASSEMBLY 2010-MECH-6 CONTACT, CURRENT INPUT 2001-313C...
  • Page 98 CONFIDENTIAL PROPRIETARY...
  • Page 99 CONFIDENTIAL PROPRIETARY...
  • Page 101 Specifications Specifications...
  • Page 102 2010 Low-Noise Multimeter DC CHARACTERISTICS CONDITIONS: MED (1 PLC) or SLOW (5 PLC) ACCURACY: ±(ppm of reading + ppm of range) TEST INPUT (ppm = parts per million) (e.g., 10ppm = 0.001%) CURRENT ±5% RESISTANCE TEMPERATURE OR BURDEN OR CLAMP...
  • Page 103 PURCHASED ITEM 2010 Low-Noise Multimeter TRUE RMS AC VOLTAGE AND CURRENT CHARACTERISTICS ACCURACY : ±(% of reading + % of range), 23°C ±5 °C VOLTAGE CALIBRATION 3 Hz– 10 Hz– 20 kHz– 50 kHz– 100 kHz– RANGE RESOLUTION CYCLE 10 Hz...

  • Page 104: Remote Interface

    2010 Low-Noise Multimeter FREQUENCY AND PERIOD CHARACTERISTICS Triggering and Memory RESOLUTION ACCURACY READING HOLD SENSITIVITY: 0.01%, 0.1%, 1%, or 10% of reading. FREQUENCY PERIOD GATE ±(ppm of 90 Day/1 Year RANGE RANGE RANGE TIME reading) ±(% of reading) TRIGGER DELAY: 0 to 99 hrs (1ms step size).

  • Page 105: Specifications

    Specifications Accuracy calculations The following information discusses how to calculate accuracy for both DC and AC characteristics. Calculating DC characteristics accuracy DC characteristics accuracy is calculated as follows: Accuracy = ±(ppm of reading + ppm of range) (ppm = parts per million, and 10ppm = 0.001%) As an example of how to calculate the actual reading limits, assume that you are measuring 5V on the 10V range.

  • Page 106: Additional Derating Factors

    Specifications Additional derating factors In some cases, additional derating factors must be applied to calculate certain accuracy values. For example, an additional derating factor of 0.02ppm/V must be added to DCV specifications for voltages over 500V. Before calculating accuracy, study the associated specifications very carefully to see if any derating factors apply.
  • Page 107 Calibration Command Ref- erence Calibration Command Reference...

  • Page 108: Calibration Command Reference

    This appendix contains detailed information about the various Model 2010 remote calibration commands. Section 2 of this manual covers detailed calibration procedures. For information about additional commands to control other instrument functions, refer to the Model 2010 User's Manual. Command summary Table B-1 summarizes Model 2010 calibration commands.
  • Page 109 Calibration Command Reference Table B-1 (cont.) Remote calibration command summary Command Description :CALibration :PROTected DC cal steps. :STEP0 Rear terminal short step. :STEP1 Front terminal short circuit. :STEP2 Open circuit. :STEP3 <NRf> 10V DC step. :STEP4 <NRf> -10V DC step. :STEP5 <NRf>...

  • Page 110: Miscellaneous Calibration Commands

    Format :cal:prot:coun? Response <n> Calibration count. Description The :COUNt? command lets you determine how many times the Model 2010 has been calibrated. Note Use the :COUNt? command to help you monitor for unauthorized calibration procedures. Example Request number of times the unit has been :CAL:PROT:COUN? calibrated.
  • Page 111 :cal:prot:lock? Purpose Comprehensive calibration locked. Comprehensive calibration unlocked. Description The :LOCK? query requests status from the Model 2010 on calibration locked/unlocked state. Calibration must be enabled sending the :CODE command before calibration can be performed. Example Request cal lock state.
  • Page 112 Calibration Command Reference :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 both comprehensive and manufacturing calibration in EEROM. (EEROM is non-volatile memory.) Calibration constants will be retained indefinitely once saved.
  • Page 113 Calibration Command Reference :NDUE (:CALibration:PROTected:NDUE) Purpose To send the next calibration due date to the instrument. Format :cal:prot:ndue <year>, <month>, <day> Parameters = 1995 to 2094 <year> = 1 to 12 <month> = 1 to 31 <day> Query format :cal:prot:ndue? Response <year>, <month>, <day>...

  • Page 114: Dc Calibration Commands

    Calibration Command Reference DC calibration commands The :DC commands perform calibration of the DCV, DCI, and ohms functions.Table B-2 summarizes these calibration commands along with parameter limits. Table B-2 DC calibration commands Parameter Command Description limits :CALibration :PROTected :STEP1 Front terminal short circuit. :STEP2 Open circuit.
  • Page 115 Calibration Command Reference :STEP2 (:CALibration:PROTected:DC:STEP2) Purpose To perform front terminal open-circuit calibration. Format :cal:prot:dc:step2 Description :STEP2 performs the open-circuit calibration step in the comprehensive calibration procedure. Disconnect all cables and accessories from the input jacks before sending this command. Example Perform open circuit calibration.
  • Page 116 B-10 Calibration Command Reference :STEP6 (:CALibration:PROTected:DC:STEP6) Purpose To program the 10Ω 4-wire comprehensive calibration step. Format :cal:prot:dc:step6 <Cal_resistance> Parameter = 9 to 11 [Ω] <Cal_resistance> Description :STEP6 programs the 10Ω 4-wire resistance comprehensive calibration step. The allowable range of the calibration resistance parameter is from 9 to 11, but 10 is recommended for best results.
  • Page 117 Calibration Command Reference B-11 :STEP10 (CALibration:PROTected:DC:STEP10) Purpose To program the 1MΩ comprehensive calibration step. Format :cal:prot:dc:step10 <Cal_resistance> Parameter = 900E3 to 1.1E6 [Ω] <Cal_resistance> Description :STEP10 programs the 1MΩ comprehensive calibration step. The allowable range of the calibration resistance parameter is from 900E3 to 1.1E6. Use the 1E6 value whenever possible, or the closest possible value.

  • Page 118: Ac Calibration Commands

    B-12 Calibration Command Reference AC calibration commands The :AC commands perform comprehensive (user) calibration of the ACV and ACI functions. Table B-3 summarizes these calibration commands. Table B-3 AC calibration commands Command Description :CALibration :PROTected :STEP 10mV AC at 1kHz calibration step. 100mV AC at 1kHZ calibration step.
  • Page 119 Calibration Command Reference B-13 :AC:STEP<n> (CALibration:PROTected:AC:STEP<n>) Purpose To program individual AC calibration steps. Format :cal:prot:ac:step<n> Parameters 10mV AC at 1kHz calibration step. 100mV AC at 1kHZ calibration step. 100mV AC at 50kHz calibration step. 1V AC at 1kHz calibration step. 1V AC at 50kHz calibration step.

  • Page 120: Manufacturing Calibration Commands

    B-14 Calibration Command Reference Manufacturing calibration commands The following three calibration steps are only performed at the factory or when the unit has been repaired: :CALibration:PROTected:AC:STEP14 1V AC at 3Hz :CALibration:PROTected:AC:STEP15 1V AC at 1kHz :CALibration:PROTected:DC:STEP0 Rear terminal short circuit :AC:STEP<14|15>...

  • Page 121: Error Summary

    Calibration Command Reference B-15 Error summary Table B-4 summarizes Model 2010 calibration errors. Table B-4 Calibration error summary Error number Description "10 vdc zero error" +400 +401 "100 vdc zero error" +402 "10 vdc full scale error" +403 "-10 vdc full scale error"...
  • Page 122 B-16 Calibration Command Reference Table B-4 (cont.) Calibration error summary Error number Description +454 "100m vac zero error" +455 "100m vac full scale error" +456 "1 vac zero error" +457 "1 vac full scale error" +458 "1 vac noise error" +459 "10 vac zero error"...

  • Page 123: Error Queue

    B-17 Error queue As with other Model 2010 errors, any calibration error will be reported in the bus error queue. You can read this queue by using the :SYST:ERR? query. The Model 2010 will respond with the appropriate error message, as summarized in Table B-4.

  • Page 124: Using The *Opc Command

    An IEEE-488 bus SRQ (service request) can be used to detect operation complete instead of repeatedly polling the Model 2010. 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.

  • Page 125: Calibration Program

    Calibration Program Calibration Program...

  • Page 126: Introduction

    Calibration Program Introduction This appendix includes a calibration program written in BASIC to help you in calibrate the Model 2010. Refer to Section 2 for more details on calibration procedures, equipment, and connections. Computer hardware requirements The following computer hardware is required to run the calibration program: •...

  • Page 127: General Program Instructions

    Turn on the computer, the Model 2010, and the calibrator. Allow the Model 2010 and the calibrator to warm up for at least two hours before performing calibration. Make sure the Model 2010 is set for a primary address of 16. (Use the front panel GPIB key to check or change the address.) Make sure the calibrator primary address is at its factory default setting of 4.
  • Page 128 Calibration Program Program C-1. QBasic calibration program ' Model 2010 calibration program for use with the Fluke 5700A calibrator. ' Rev. 1.0, 9/11/95 OPEN "IEEE" FOR OUTPUT AS #1 ' Open IEEE-488 output path. OPEN "IEEE" FOR INPUT AS #2 ' Open IEEE-488 input path.
  • Page 129 PRINT #1, "OUTPUT 4;OPER" END SELECT IF I > 2 THEN GOSUB Settle PRINT #1, "OUTPUT 16;"; C$; Cmd$; ";*OPC" ' Send cal command to 2010. GOSUB CalEnd ' Wait until cal step ends. GOSUB ErrCheck ' Check for cal error.
  • Page 130 Calibration Program PRINT #1, "OUTPUT 16;:SYST:ERR?" ' Query error queue. PRINT #1, "ENTER 16" INPUT #2, E, Err$ IF E <> 0 THEN BEEP: PRINT Err$: GOTO ErrCheck' Display error. RETURN Settle: ' Calibrator settling routine. DO: PRINT #1, "OUTPUT 4;ISR?" ' Query status register.

  • Page 131: Index

    Index Environmental conditions 1-2, 2-2 Error queue B-17 Aborting calibration Error summary B-15 AC calibration commands B-12 Example reading limit calculation AC current calibration 2-12, 2-18 AC voltage calibration 2-11, 2-18 Accuracy calculations Factory service Additional derating factors Firmware revision level 2-20 AMPS input Front panel calibration...
  • Page 132 B-18 Power supply Using the *OPC? query B-17 Power supply checks 4-11 Power transformer removal Power-on self-test Preparing the Model 2010 for calibration 2-6, Verification limits 2-14 Verification test requirements Principles of operation Verifying AC current Programming calibration dates 2-19...

  • Page 133: Service Form

    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 ❏ ❏...
  • Page 134 M E A S U R E C O N F I D E N C E Keithley Instruments, Inc. Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168 • 1-888-KEITHLEY • www.keithley.com 12/06...

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