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Keithley 2002 Calibration Manual

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Model 2002
Multimeter
Calibration Manual
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 2002

  • Page 1 Model 2002 Multimeter Calibration Manual 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...
  • Page 2 Model 2002 Multimeter Calibration Manual ©1994, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Fourth Printing, May 2004 Document Number: 2002-905-01 Rev. D...
  • Page 3 Revision C (Document Number 2002-905-01) ................November 2000 Revision D (Document Number 2002-905-01) ..................May 2004 All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc. Other brand and product names are trademarks or registered trademarks of their respective holders...
  • Page 4 Keithley products are designed for use with electrical signals that The instrument and accessories must be used in accordance with its are rated Measurement Category I and Measurement Category II, as...
  • Page 5 Keithley Instru- symbol on an instrument indicates that the user should re- ments. Standard fuses, with applicable national safety approvals, fer to the operating instructions located in the manual.

  • Page 6: Table Of Contents

    Table of Contents Performance Verification Introduction ................................. Environmental conditions ........................... Warm-up period ..............................Line power ................................Recommended test equipment ..........................Verification limits ............................... 1.6.1 Reading limit calculation example......................1.6.2 Additional derating factors.......................... Restoring default conditions ..........................Verification procedures............................1.8.1 DC volts verification ........................... 1.8.2 AC volts verification ...........................
  • Page 7 2.10 Low-level calibration............................2-13 2.10.1 Recommended equipment for low-level calibration ................. 2-13 2.10.2 Low-level calibration summary......................... 2-13 2.10.3 Front panel low-level calibration procedure....................2-16 2.10.4 IEEE-488 bus low-level calibration procedure ..................2-20 2.11 Single-point calibration ............................. 2-24 2.11.1 Front panel single-point calibration......................2-24 2.11.2 IEEE-488 bus single-point calibration ......................
  • Page 8 List of Illustrations Performance Verification Figure 1-1 Connections for DC volts verification ......................Figure 1-2 Connections for AC volts verification (all except 2MHz) ................Figure 1-3 Connections for 2MHz AC volts verification ..................... Figure 1-4 Connections for DC current verification....................1-11 Figure 1-5 Connections for AC current verification....................
  • Page 10 List of Tables Performance Verification Table 1-1 Recommended Test Equipment for Performance Verification..............Table 1-2 Limits for DCV verification........................Table 1-3 Limits for normal mode AC voltage verification..................Table 1-4 Limits for low-frequency mode AC voltage verification................Table 1-5 Limits for AC peak voltage verification ....................1-10 Table 1-6 Limits for DC current verification ......................

  • Page 12: Performance Verification

    The procedures in this section are intended to verify that each test procedure. Model 2002 accuracy is within the limits stated in the instru- Verification procedures: Details procedures to verify ment one-year accuracy specifications. These procedures can measurement accuracy of all Model 2002 measure- be performed when the instrument is first received to ensure...

  • Page 13: Line Power

    The calculated limits are: Reading limits = 19V ± [(19V × (10ppm + 2.6ppm)) + (20V The Model 2002 should be tested while operating from a line × 0.15ppm) + 19V × 5.4ppm] voltage in the range of 90–134V or 180–250V at a frequency of 50, 60, or 400Hz.
  • Page 14 Fluke 5700A-03 Wideband AC option 190mV ± 0.22%, 1.9V ± 0.3% @ 2MHz Fluke 5440A-7002 Low-thermal cable set Keithley CA-18-1 Low-capacitance cable Low-capacitance dual banana to dual banana shielded cable (for ACV), 1.2m (4 ft.) in length. Keithley R-289-1G 1GΩ resistor NOTE: Resistor should be characterized to within ±1,000ppm and...

  • Page 15: Verification Procedures

    Connect the shield to calibrator tion uncertainty. output LO. If the Model 2002 is out of specifications and not under war- 2. Turn on the Model 2002 and the calibrator, and allow ranty, refer to the calibration procedures in Section 2.
  • Page 16 Voltage Range (1 year, 18° to 28°C) allow the reading to settle. 200mV 190.000000mV 189.991911mV to 190.008089mV 9. Verify that the Model 2002 reading is within the limits 1.90000000V 1.89996058 to 1.90003942V summarized in Table 1-2. 19.0000000V 18.9996550V to 19.0003450V 10.

  • Page 17: Ac Volts Verification

    5. Set the calibrator output to 190.000mVAC at a fre- quency of 100Hz, and allow the reading to settle. CAUTION 6. Verify that the Model 2002 reading is within the limits summarized in Table 1-3. Do not exceed 1100V peak between IN- PUT HI and INPUT LO, or 2 ×...
  • Page 18 Performance Verification 5725 Amplifier (Connect to calibrator) Input HI Model 2002 Output HI 1.90000 VAC RMS 2001 MULTIMETER Input Output 5700A Calibrator (Output AC Voltage) CA-18-1 Low- capacitance cable Figure 1-2 Connections for AC volts verification (all except 2MHz) 5725 Amplifier (Connect to calibrator)
  • Page 19 Performance Verification Table 1-3 Limits for normal mode AC voltage verification...
  • Page 20 C. Press EXIT as required to return to normal display. 2. Connect the Model 2002 to the calibrator, as shown in 6. Set the calibrator output to 190.000mVAC at a fre- Figure 1-2. Be sure to connect the amplifier HI to Model quency of 10Hz, and allow the reading to settle.
  • Page 21 701.0V 712.9V 713.2V ** Calibrator voltage is given as an RMS value. Model 2002 reading limits are peak AC values. ** CAUTION: Do not apply more than 2 × 10 V•Hz. † Use AC+DC input coupling for 20Hz tests only. (Use CONFIG-ACV to set coupling.) NOTE: Limits shown include uncertainty of recommended calibrator.

  • Page 22: Dc Current Verification

    AMPS input, and connect calibrator LO to INPUT LO 2002 as shown. Applied DC Reading limits 2. Turn on the Model 2002 and the calibrator, and allow a range current (1 year, 18°C to 28°C) one-hour warm-up period before making measure- ments.

  • Page 23: Ac Current Verification

    Performance Verification 1.8.4 AC current verification 2. Turn on the Model 2002 and the calibrator, and allow a one-hour warm-up period before making measure- AC current verification is performed by applying accurate ments. Be sure the calibrator is set for normal current AC currents at specific frequencies and then verifying that...

  • Page 24: Resistance Verification

    HI and LO terminals to the Model ed in Table 1-8. 2002 HI and LO terminals (including SENSE HI and LO) as shown. NOTE 2. Turn on the Model 2002 and the calibrator, and allow a Resistance values available in the Model four-hour warm-up period...
  • Page 25 G. Press EXIT to return to normal display. compensation for the 200kΩ and 2MΩ ranges.) 4. Select the Model 2002 Ω2 function, and change to the 20MΩ range. (If the FILT annunciator is off, press the FILTER key to enable the filter.) 20MΩ...

  • Page 26: Frequency Accuracy Verification

    4. Select the 2-wire ohms function (Ω2) and the 1GΩ 2. Use 4-wire connections and function for 20Ω-2MΩ ranges. Use 2- range on the Model 2002. (If the FILT annunciator is off, wire connections and function for 20MΩ and 200MΩ ranges.
  • Page 27 D. Press EXIT to return to normal display. 6. Press the FREQ key to select the frequency function. 10kHz 9.9970kHz to 10.003kHz 7. Verify that the Model 2002 frequency reading is within 100kHz 99.970kHz to 100.03kHz the limits shown in the first line of Table 1-10.
  • Page 28 7 to 13 7. Press EXIT as necessary to return to normal display. 0.647mV 97 to 103 8. Press the TEMP key to place the Model 2002 in the tem- 4.471mV 497 to 503 perature display mode. Refer to further information 20.877mV...
  • Page 29 (Table 1-12). Reading limits Be sure to use 4-wire connections between the decade resis- RTD probe Applied (°C) 1 year, tance box and the Model 2002. type resistance 18°C to 28°C PT385 22.80Ω -190.068 to -189.932 (α=0.00385)

  • Page 30: Calibration

    Calibration Introduction Warm-up period: Discusses the length of time the Model 2002 should be allowed to warm up before This section gives detailed procedures for calibrating the calibration. Model 2002. Basically, there are three types of calibration Line power: States the power line voltage limits when procedures: calibrating the unit.

  • Page 31: Environmental Conditions

    Warm-up period NOTE The Model 2002 must be allowed to warm up for at least four Do not unlock low-level calibration unless hours before calibration. If the instrument has been subjected you have the appropriate equipment and to temperature extremes (outside the range stated in para- intend to perform low-level calibration.
  • Page 32 :DATA? Send cal date to 2002. :DATE <yr>, <mon>, <day> Request cal date from 2002. :DATE? Send next due cal date to 2002. :NDUE <yr>, <mon>, <day> Request next due cal date from 2002. :NDUE? Comprehensive calibration subsystem. Short-circuit calibration step.

  • Page 33: Calibration Errors

    field. However, if the unit has been repaired, you should per- Follow the steps below to calibrate the Model 2002 from the form the low-level calibration procedure explained in para- front panel. Refer to paragraph 2.8.3 below for the procedure graph 2.10.
  • Page 34 Procedure Step 1: Prepare the Model 2002 for calibration Figure 2-1 1. Turn on the power, and allow the Model 2002 to warm Low-thermal short connections up for at least four hours before performing calibration. 2. Unlock comprehensive calibration by briefly pressing in...
  • Page 35 Wait at least three minutes for thermal 6. After completing 2VDC calibration, the instrument will equilibrium. display the following: 4. Press ENTER, and note that the Model 2002 displays the presently selected calibration voltage: CONNECT 20 VDC INPUT = 2.00000000 V 7.
  • Page 36 20Ω 19Ω 9.5Ω to 20.5Ω * Nominal values shown. Use exact calibrator value. 3. Press ENTER, and note that the Model 2002 displays the resistance calibration value: Step 6: DC amps calibration INPUT = 1.0000000 MΩ 1. After ohms calibration is completed, the instrument will prompt you for the first DC amps calibration step:...
  • Page 37 2. Make sure all test leads are still disconnected from the 1. At the end of a successful calibration cycle, the instru- Model 2002 INPUT and SENSE jacks. ment will display the following: 3. Press ENTER to perform AC calibration, which will CALIBRATION COMPLETE take about six minutes to complete.
  • Page 38 Calibration 2.8.3 IEEE-488 bus comprehensive calibration NOTE Valid calibration constants will be saved, Follow the procedure outlined below to perform comprehen- and comprehensive calibration will be au- sive calibration over the IEEE-488 bus. Table 2-4 summa- tomatically locked out after the calibration rizes the calibration procedure and bus commands.
  • Page 39 IEEE-488 cable such as the Step 3: DC Volts Calibration Keithley Model 7007. 2. Turn on the power, and allow the Model 2002 to warm 1. Disconnect the low-thermal short, and connect the DC up for at least four hours before performing calibration.
  • Page 40 20.5V if you are using a different voltage.) ibration points as shown in Table 2-5. 7. Wait until the Model 2002 finishes this step before going Step 5: Amps calibration 1. Connect the calibrator to the AMPS and INPUT LO jacks, as shown in Figure 2-3.

  • Page 41: Ac Self-Calibration

    :CAL:PROT:SAVE SAVESETUP GPIB CALIBRATION Step 10: Lock out calibration 3. Select CALIBRATION, then press ENTER. The Model 2002 will display the following: To lock out further calibration, send the following command after completing the calibration procedure: PERFORM CALIBRATION COMPREHENSIVE POINT-CALS :CAL:PROT:LOCK 4.

  • Page 42: Ieee-488 Bus Ac Self-Calibration

    NOTE Disconnect inputs; press ENTER Low-level calibration is required in the field only if the Model 2002 has been 6. Press ENTER to begin AC calibration, which will take repaired, or if the other calibration proce- about six minutes to complete. During AC calibration,...
  • Page 43 200mV @ 1kHz: ±150ppm 1.5V @ 1kHz: ±80ppm 20V @ 1kHz: ±80ppm 20V @ 30kHz: ±140ppm 200V @ 1kHz: ±85ppm 200V @ 30kHz: ±240ppm AC Current: 20mA @ 1kHz: ±160ppm Keithley 3930A or Synthesizer 2V rms @ 1Hz 3940 Keithley 8610 Low-thermal shorting plug * 90-day calibrator specifications shown include total uncertainty at specified output.
  • Page 44 Calibration Table 2-8 Low-level calibration summary Calibration signal Calibration command* Comments None Initiate calibration. :CAL:PROT:INIT Low-thermal short Comprehensive cal zero. :CAL:PROT:DC:ZERO 2V DC Comprehensive cal 2V. :CAL:PROT:DC:V2 20V DC Comprehensive cal 20V. :CAL:PROT:DC:V20 1MΩ Comprehensive cal 1MΩ. :CAL:PROT:DC:OHM1M 1E6 100kΩ Comprehensive cal 200kΩ.

  • Page 45: Front Panel Low-Level Calibration Procedure

    (Holding in the CAL switch while turning on the power enables low-level calibration.) NOTE 3. Allow the Model 2002 to warm up for at least four hours Although 4-wire connections are shown, before performing calibration. the sense leads are connected and discon- 4.
  • Page 46 INPUT = 20.0000000 V 9. Using the cursor and range keys, set the resistance value displayed by the Model 2002 to the exact resistance val- ue displayed by the calibrator. (The allowable range for (At this point, you can use the cursor and range keys to set this parameter is from 95kΩ...
  • Page 47 LOW-LEVEL CAL PHASE Low-Level Cal - Step 3 of 13 NOTE 9. When finished with this step, the Model 2002 will Use the exact calibration values shown display: when performing the following steps. Connect 200V @ 30kHz...
  • Page 48 Low-Level Cal - Step 10 of 13 14. Program the calibrator to output 200mV at a frequency of 1kHz, then press ENTER. The Model 2002 will then 23. The Model 2002 will then prompt for the next calibra- display the following: tion signal:...
  • Page 49 (Holding in the CAL switch while turning on the power enables low-level calibration.) 1. The Model 2002 will then display the following mes- 5. Allow the Model 2002 to warm up for at least four hours sage: before performing calibration.
  • Page 50 INPUT and SENSE terminals, as shown in Figure 2-1. Wait at least three minutes before proceeding to allow for thermal equilibrium. 4. Wait until the Model 2002 finishes this step before going NOTE Be sure to properly connect HI, LO, and NOTE SENSE terminals.
  • Page 51 * Nominal resistance values shown. Use exact calibrator resistance value for command parameter. Step 6. Open-circuit calibration Step 5: Amps calibration 1. Disconnect all test leads from the Model 2002 INPUT and AMPS jacks. 1. Connect the calibrator to the AMPS and INPUT LO 2.
  • Page 52 Model 2002: tion command. :CAL:PROT:LLEV:STEP 10 1. Connect the Model 2002 to the calibrator using 2-wire NOTE connections, as shown in Figure 2-4. The accuracy of the -20V source is espe- 2.

  • Page 53: Single-Point Calibration

    Calibration Step 10: Save calibration constants 1. Turn on the Model 2002, and allow the instrument to warm up for at least four hours before performing Calibration is now complete, so you can store the calibration calibration. constants in EEROM by sending the following command: 2.
  • Page 54 7. If desired, send the following commands to program the range. The basic steps are summarized below: calibration date and calibration due date: 1. Turn on the Model 2002 power, and allow the instru- :CAL:PROT:DATE <yr>,<mon>,<day> ment to warm up for at least four hours before perform- :CAL:PROT:NDUE <yr>,<mon>,<day>...
  • Page 55 Calibration 2-26...

  • Page 56: Introduction

    :ACC command, which is used to perform AC user This section contains detailed information on the various calibration over the bus. Model 2002 IEEE-488 bus calibration commands. Section 2 Bus error reporting: Summarizes bus calibration of this manual covers detailed calibration procedures, and errors, and discusses how to obtain error information.
  • Page 57 :DATA? Send cal date to 2002. 3.3.6 :DATE <yr>, <mon>, <day> Request cal date from 2002. :DATE? Send next due cal date to 2002. 3.3.7 :NDUE <yr>, <mon>, <day> Request next due cal date from 2002. :NDUE? Comprehensive calibration subsystem.

  • Page 58: Calibration:protected Subsystem

    Calibration Command Reference :CALibration:PROTected Subsystem The calibration protected subsystem commands perform all Model 2002 calibration except for AC-only calibration. All commands in this subsystem are protected by the calibration lock (CAL switch). The following paragraphs discuss these commands in detail.

  • Page 59: Switch

    Comprehensive calibration locked Comprehensive calibration unlocked. Description The :SWITch? query requests status from the Model 2002 on calibration locked/unlocked state. Calibration must be unlocked by pressing in on the CAL switch while power is turned on before calibration can be performed.

  • Page 60: Date

    Calibration Command Reference 3.3.6 :DATE (:CALibration:PROTected:DATE) Purpose To send the calibration date to the instrument. Format :cal:prot:date <yr>,<mon>,<day> Parameters <yr> = year (yyyy, 1993 to 2092) <mon> = month (mm, 1 to 12) <day> = day of month (dd, 1 to 31) Query Format :cal:prot:date? Response...
  • Page 61 Calibration Command Reference 3.3.8 :DC (:CALibration:PROtected:DC) The :DC commands perform comprehensive (user) calibration. Table 3-2 summarizes these comprehensive calibration commands along with parameter limits. Table 3-2 Comprehensive calibration commands Command Description Parameter limits :CALibration :PROTected User calibration subsystem. Short-circuit calibration :ZERO +2V DC calibration step 0.95 to 2.05...
  • Page 62 Calibration Command Reference (:CALibration:PROTected:DC:V2) Purpose To program the +2V comprehensive calibration step. Format :cal:prot:dc:v2 <Cal_voltage> Parameter <Cal_voltage> = 0.95 to 2.05 [V] Description :V2 programs the +2V DC comprehensive calibration step. The allowable range of the calibra- tion voltage parameter is from 0.95 to 2.05V, but 2V is recommended for best results. Example :CAL:PROT:DC:V2 2 Program 2V step.
  • Page 63 Calibration Command Reference :OHM200K (CALibration:PROTected:DC:OHM200K) Purpose To program the 200kΩ comprehensive calibration step. Format :cal:prot:dc:ohm200k <Cal_resistance> Parameter <Cal_resistance> = 95E3 to 205E3 [Ω] Description :OHM200K programs the 200kΩ comprehensive calibration step. The allowable range of the calibration resistance parameter is from 95kΩ to 205kΩ. Use a 100kΩ value whenever possible, or the closest possible value.
  • Page 64 Calibration Command Reference :OHM200 (CALibration:PROTected:DC:OHM200) Purpose To program the 200Ω comprehensive calibration step. Format :cal:prot:dc:ohm200 <Cal_resistance> Parameter <Cal_resistance> = 95 to 205 [Ω] Description :OHM200 programs the 200Ω comprehensive calibration step. The allowable range of the calibration resistance parameteris from 95Ω to 205Ω. Use the 200Ω value whenever possible, or the closest possible value (for example, 190Ω, which is the closet value available on many calibrators).
  • Page 65 Calibration Command Reference :A2M (CALibration:PROTected:DC:A2M) Purpose To program the 2mA comprehensive calibration step. Format :cal:prot:dc:a2m <Cal_current> Parameter <Cal_current> = 0.95E-3 to 2.05E-3 [A] Description :A2M programs the 2mA comprehensive calibration step. The allowable range of the calibration current parameter is from 0.95mA to 2.05µA. Use the 2mA value whenever possible for best results.

  • Page 66: Llevel

    Calibration Command Reference (CALibration:PROTected:DC:A2) Purpose To program the 2A comprehensive calibration step. Format :cal:prot:dc:a2 <Cal_current> Parameter <Cal_current> = 0.95 to 2.05 [A] Description A2 programs the 2A comprehensive calibration step. The allowable range of the calibration cur- rent parameter is from 0.95A to 2.05A. Use the 1A value whenever possible for best results. Example :CAL:PROT:DC:A2 1 Program 2A step.
  • Page 67 Calibration Command Reference :SWITch? (CALibration:PROTected:LLEVel:SWITch?) Purpose To request the state of the low-level calibration lock. Format :cal:prot:llev:swit? Response Low-level calibration locked Low-level calibration unlocked Description :SWITch? query requests the status of the low-level calibration lock from the instrument. This :SWITch? query should not be confused with the :SWITch? query that requests the status of the comprehensive calibration lock (see paragraph 3.3.2.) Programming Note To unlock low-level calibration, hold in the CAL switch while turning on instrument power.

  • Page 68: Calibration:unprotected Subsystem

    Appendix B may be used as examples for some of these methods. Error queue As with other Model 2002 errors, any calibration errors will be reported in the bus error queue. You can read this queue by using the :SYST:ERR? query. The Model 2002 will respond with the appropriate error message, as summarized in Appendix C.

  • Page 69: Detecting Calibration Step Completion

    An SRQ (service request) can be used to detect operation complete instead of repeatedly polling the Model 2002. 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 in para- graph 3.6.2 above.

  • Page 70: A Specifications

    Specifications Specifications...
  • Page 71 90-day, 1-year, or 2-year recommended calibra- tion intervals, depending upon the level of accuracy desired. As a general rule, the 2002’s 2-year performance exceeds a 6 -digit DMM’s 90-day, 180-day, or 1-year specifications. Absolute Accuracy All DC specifications are given as relative accuracies.
  • Page 72 + 0.4 + 0.1 15 + 0.5 + 0.5 90 + 200 + 2 PLC = Power Line Cycles. DFILT = Digital Filter. Noise Rejection (dB) Keithley Factory Calibration Uncertainty Speed AC and DC CMRR AC NMRR Range ppm of reading...
  • Page 73 Specifications DC Volts (cont’d) Linearity <0.1ppm of range typical, Polarity Reversal Error This is the portion of the instrument error that is seen when <0.2ppm maximum. HI and LO are reversed. This is not an additional error—it is included in the overall instrument accuracy specification. Zero Stability Typical maximum variation ±...
  • Page 74 Specifications AC magnitude: rms or Average. Peak and Crest Factor measurements also available. AC Volts ACV Input Characteristics Temperature Coefficient ± ° Peak Full Scale (% of reading + % of range) / ± ° Range Input Resolution Input Impedance Outside T 1MΩ...
  • Page 75 Specifications AC Volts (cont’d) ACV Crest Factor Measurement AC Coupling For AC only coupling, add the following % of reading: 1–10Hz 10–20Hz 20–50Hz 50–100Hz 100–200Hz Crest Factor = Peak AC / rms AC. Normal Mode (rms, average) — — 0.41 0.07 0.015 Crest Factor Resolution...
  • Page 76 Ω 1.4 µA 200 MΩ 210.000000 14 V Ω 1.4 µA 1 GΩ 1.05000000 14 V Keithley Factory Calibration Uncertainty Enhanced Accuracy 10PLC, Offset comp. on, DFILT 10 Temperature Range ppm of reading Coefficient 20 Ω ± 29.5 Relative Accuracy (ppm of reading + 200 Ω...
  • Page 77 Specifications Ohms (cont’d) Settling Characteristics Pre-programmed settling delay times are for <500pF external circuit capacitance. Reading settling times are affected by source impedance and cable dielectric absorption characteristics. Ohms Voltage Drop Measurement Available as a multiple display. Autoranging Autoranges up at 105% of range, down at 10% of range. 2-Wire Resistance Reading Rates 10,12 Readings/Second with...
  • Page 78 The DC in-circuit current measurement function allows a user to measure the current through a wire or a circuit board trace without breaking the circuit. When the In-Circuit Current Measurement function is selected, the 2002 will first perform a 4- wire resistance measurement, then a voltage measurement, and will display the calculated 10Ω...
  • Page 79 A-10 Specifications AC magnitude: rms or Average. AC Amps ACI Input Characteristics Temperature Maximum Coefficient ± ° Peak Full Scale Burden (% of reading + % of range)/ ± ° Range Input Resolution Voltage Outside T 200 µA 1 mA 210.0000 100 pA 0.35 V...
  • Page 80 Specifications A-11 Frequency Counter Frequency/Period Input Characteristics and Accuracy 90 Days, 1 Year, or 2 Years Frequency Period Minimum Signal Level Maximum Trigger Accuracy ± Range Range Resolution 1Hz–1MHz 1–5MHz 5–15MHz Input Level (% of reading) AC Voltage Input 1Hz–15 MHz 67 ns –...
  • Page 81 A-12 Specifications Operating Speed Function Change Speed Range Change Speed Typical delay before measurement initiation after making a function change. Typical delay before measurement initiation after making a range change. From Function From Time Function Function Range Time 5.2 ms Any except 4WΩ, Temp 4.6 ms 4WΩ, Temp...
  • Page 82 For MIL-T-28800E, applies to Type III, Class 5, Style E. Extended Memory/Non-Volatile Memory Options DATA STORAGE 6 -Digit Size with Setup Storage Model (Bytes) 4 -Digit Time Stamp Type Number Type 2002 2,027 volatile non-volatile 2002/MEM1 6,909 1,381 non-volatile non-volatile 2002/MEM2 128k 29,908 5,980...
  • Page 83 A-14 Specifications...

  • Page 84: Calibration Programs

    This appendix includes programs written in BASIC and Tur- • HP-style Universal Language Driver, CECHP.EXE bo C to aid you in calibrating the Model 2002. Refer to Sec- (supplied with Keithley and CEC interface cards listed tion 2 for more details on calibration procedures.
  • Page 85 200µA: ±100ppm 2mA: ±55ppm 2mA: ±55ppm 20mA: ±55ppm 20mA: ±55ppm 200mA: ±65ppm 200mA: ±65ppm 1A: ±110ppm 1A: ±110ppm Keithley 8610 Low-thermal AC Voltage: shorting plug 0.5mV @ 1kHz: * 90-day calibrator specifications shown include total uncertainty at speci- ±10000ppm fied output.
  • Page 86 Figure B-2 shows calibrator connections. 2. Turn on the computer, the Model 2002, and the calibra- tor. Allow the Model 2002 to warm up for at least four Low-level calibration hours before performing calibration. 3. Make sure the Model 2002 is set for a primary address Programs B-3 and B-4 perform low-level calibration using of 16.
  • Page 87 Calibration Programs 5700A Calibrator Sense HI Sense HI Model 2002 Input HI Output HI 2002 MULTIMETER Input Output Sense LO Sense LO Note : Use shielded cables to minimize noise. Enable or disable calibrator external sense as indicated in procedure.
  • Page 88 Figure B-5 Synthesizer connections Program B-1 Comprehensive calibration program for use with Fluke 5700A Calibrator (BASIC Version) ' Model 2002 comprehensive calibration program for use with the ' Fluke 5700A calibrator. ' Rev. 1.2, 4/7/94 OPEN "IEEE" FOR OUTPUT AS #1 ' Open IEEE-488 output path.
  • Page 89 END SELECT IF I <> 1 AND I <> 15 AND I <> 16 THEN GOSUB Settle PRINT #1, "OUTPUT 16;"; C$; Cmd$; ";*OPC" ' Send cal command to 2002. GOSUB CalEnd ' Wait until cal step ends. GOSUB ErrCheck ' Check for cal error.
  • Page 90 Calibration Programs Settle: ' Calibrator settling routine. DO: PRINT #1, "OUTPUT 4;ISR?" ' Query status register. PRINT #1, "ENTER 4" INPUT #2, S LOOP UNTIL (S AND &H1000) ' Test settle bit. RETURN EndProg: ' Close files, end program. BEEP: PRINT "Calibration aborted." PRINT #1, "OUTPUT 4;STBY"...
  • Page 91 Calibration Programs Program B-2 Comprehensive Calibration Program for Use with Fluke 5700A Calibrator (C Version) /* Model 2002 comprehensive calibration program for use with the Fluke 5700A calibrator. Rev. 1.2. 4/7/94 */ #include <stdio.h> #include <stdlib.h> #include <conio.h> FILE *ieeein,*ieeeout;...
  • Page 92 Calibration Programs fprintf(ieeeout,"output 4;%s\n",msg[i]); fprintf(ieeeout,"output 4;oper\n"); break; case 2: fprintf (ieeeout,"output 4;%s\n",msg[i]); break; case 3: case 4: case 5: case 6: case 7: case 8: fprintf(ieeeout,"output 4;%s\n",msg[i]); fprintf(ieeeout,"output 4;extsense on\n"); fprintf(ieeeout,"output 4;oper\n"); fprintf(ieeeout,"output 4;out?\n"); fprintf(ieeeout,"enter 4\n"); fgets(buf,100,ieeein); j=0; while (buf[j++] !=’,’); buf[--j]=’\0’;...
  • Page 93 Calibration Programs int calend(n) /* Check for cal end. */ int n; int stat; printf("Performing cal step #%d.\n",n+1); do { fprintf(ieeeout,"srq?\n"); fscanf(ieeein,"%d",&stat); while (stat==0); fprintf(ieeeout,"output 16;*esr?\n"); fprintf(ieeeout,"enter 16\n"); fscanf(ieeein,"%d",&stat); fprintf(ieeeout,"spoll 16\n"); fscanf(ieeein,"%d",&stat); void errcheck() /* Check for error. */ char errbuf[100]; fprintf(ieeeout,"output 16;:syst:err?\n");...
  • Page 94 Calibration Programs Program B-3 Low-level Calibration Program for Use with Fluke 5700A Calibrator (BASIC Version) ' Model 2002 low-level calibration program for use only with the ' Fluke 5700A calibrator. ' Rev. 1.2, 4/7/94 OPEN "IEEE" FOR OUTPUT AS #1 ' Open IEEE-488 output path.
  • Page 95 IF I <> 1 AND I <> 15 AND I <> 16 AND I <> 27 AND I <> 29 THEN GOSUB Settle PRINT #1, "OUTPUT 16;"; C$; Cmd$; ";*OPC" ' Send cal command to 2002. GOSUB CalEnd ' Wait until cal step ends.
  • Page 96 Calibration Programs CmdList: DATA "Connect low-thermal short to inputs, wait 3 minutes.","DC:ZERO" DATA "OUT 2 V","DC:V2 2" DATA "OUT 20 V","DC:V20 20" DATA "OUT 1 MOHM","DC:OHM1M" DATA "OUT 100 KOHM","DC:OHM200K" DATA "OUT 19 KOHM","DC:OHM20K" DATA "OUT 1.9 KOHM","DC:OHM2K" DATA "OUT 190 OHM","DC:OHM200" DATA "OUT 19 OHM","DC:OHM20"...
  • Page 97 Calibration Programs Program B-4 Low-level Calibration Program for Use with Fluke 5700A Calibrator (C Version) /* Model 2002 low-level calibration program for use with the Fluke 5700A calibrator. Rev. 1.2, 4/7/94 */ #include <stdio.h> #include <stdlib.h> #include <conio.h> FILE *ieeein,*ieeeout;...
  • Page 98 Calibration Programs clrscr(); /* Clear CRT. */ printf(“Model 2002 Calibration Program.\n"); printf(“This program controls the 5700A Calibrator.\n"); chkswit(); /* Check cal switch. */ fprintf(ieeeout,"output 16;;cal:prot:init\n"); for(i=0;i<=28;i++) { /* Loop for cal points. */ switch(i) { case 0: case 14: case 28:fprintf(ieeeout,"output 4;stby\n");...
  • Page 99 Calibration Programs keypress(); break; if (i!=0 && i!=14 && i!=15 && i!=26 && i!=28) settle(); if (i>2 && i<9) fprintf(ieeeout,"output 16;%s%s;*opc\n",cmd[i],buf); else fprintf(ieeeout,"output 16;%s;*opc\n",cmd[i]); calend(i); errcheck(); printf("Enter calibration date (yyyy,mm,dd): "); gets(date); fprintf(ieeeout,"output 16;:cal:prot:date %s\n",date); errcheck(); printf("Enter calibration due date (yyyy,mm,dd): "); gets(date);...
  • Page 100 Calibration Programs void settle() /* Calibrator settle. */ int stat; do { fprintf(ieeeout,"output 4;isr?\n"); fprintf(ieeeout,"enter 4\n"); fscanf(ieeein,"%d",&stat); while (!(stat & 0x1000)); void endpgm() /* End program. */ fprintf(ieeeout,"output 4;stby\n"); printf("Calibration aborted.\n"); fprintf(ieeeout,"local 4 16\n"); exit(1); B-17...
  • Page 101 Calibration Programs B-18...

  • Page 102: Calibration Messages

    +444,"Cal step generated invalid data" Error generation Invalid calibration data error After each calibration command is sent, the Model 2002 will A "Cal step generated invalid data" error (+444) will be gen- perform the appropriate calibration step and calculate perti- erated when the ":CAL:PROT:SAVE"...
  • Page 103 Calibration Messages Table C-1 (cont.) Table C-1 Calibration error messages Calibration error messages Error number Message Error number Message +390 “2k ohm fs oc out of spec” +350 “200µa zero out of spec” +391 “200 ohm fs out of spec” +351 “2ma zero out of spec”...
  • Page 104 Calibration Messages Table C-1 (cont.) Calibration error messages Error number Message +440 “ampsac out of spec” +441 “ampsacdc out of spec” +442 “lfac out of spec” +443 “lfacdc out of spec” +444 “Cal step generated invalid data” +445 “Preamp 1k gain out of spec” +446 “Preamp 10k gain out of spec”...
  • Page 105 Calibration Messages Table C-2 Calibration constants returned by :CAL:PROT:DATA? query Cal constant Description RMS gain for 2V, 200V, and 750V ranges RMS offset for 2V, 200V, and 750V AC ranges RMS gain for 200mV and 20V AC ranges of10 RMS offset for 200mV and 20V AC ranges gfwr1 Average gain for 2V, 200V, and 750V AC ranges offwr1...
  • Page 106 Calibration Messages Table C-2 (cont.) Calibration constants returned by :CAL:PROT:DATA? query Cal constant Description c200rzon 200Ω 2-wire zero OC on c200rzoff 200Ω 2-wire zero OC off c20r4wz 20Ω 4-wire zero c20r4wzon 20Ω 4-wire zero OC on c20r4wzoff 20Ω 4-wire zero OC off c20rz 20Ω...
  • Page 107 Calibration Messages Table C-2 (cont.) Calibration constants returned by :CAL:PROT:DATA? query Cal constant Description tmpdiv100 /100 divider cal value divval2 Divider cal value 2 divval3 Divider cal value 3 tmpdiv200 /200 divider cal value tmpdiv500 /500 divider cal value acvallow AC-coupled cal value for low ranges dcvallow DC-coupled cal value for low ranges...

  • Page 108: Calibration Command Summary

    :DATA? Send cal date to 2002. :DATE <yr>, <mon>, <day> Request cal date from 2002. :DATE? Send next due cal date to 2002. :NDUE <yr>, <mon>, <day> Request next due cal date from 2002. :NDUE? Comprehensive calibration subsystem. Short-circuit calibration step.
  • Page 109 Calibration Command Summary Table D-1 Calibration commands Command Description Low-level calibration subsystem. :LLEVel Request low-level CAL switch state. (0 = locked; 1 = unlocked) :SWITch? :STEP <Step #> 20V AC at 1kHz step. 20V AC at 30kHz step. 200V AC at 1kHz step. 200V AC at 30kHz 1.5V AC at 1kHz step.
  • Page 110 Index Symbols Calibration error summary 3-13 Calibration errors Calibration lock :ACCompensation 3-13 IEEE-488 bus AC self-calibration 2-13 Calibration messages :CALibration:PROTected subsystem IEEE-488 bus calibration commands Calibration programs :CALibration:UNPRotected IEEE-488 bus calibration lock status Command summary subsystem 3-13 IEEE-488 bus comprehensive calibration Commands :DATA? IEEE-488 bus error reporting...
  • Page 111 Selecting the temperature sensor 1-17 Unlocking calibration Warm-up period 1-1, 2-2 Single-point calibration 2-24 Using the *OPC command 3-14 Specifications Using the *OPC query 3-14 Status byte EAV (Error Available) Bit 3-13 Verification limits Temperature drift error Verification procedures Temperature reading checks 1-17 Thermocouple temperature reading checks...
  • Page 112 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 Batteries and fuses are OK Front panel operational All ranges or functions are bad...
  • Page 114 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. Keithley Instruments, Inc. 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168 1-888-KEITHLEY (534-8453) www.keithley.com...

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