Keithley 2000 Calibration Manual
  1. Manuals
  2. Brands
  3. Keithley Manuals
  4. Multimeter
  5. 2000
  6. Calibration manual

Keithley 2000 Calibration Manual

2000 series
Hide thumbs Also See for 2000:
Table of Contents

Advertisement

Quick Links

See also: Repair Manual , User Manual
Model 2000
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

Advertisement

Table of Contents
loading

Related Manuals for Keithley 2000

Summary of Contents for Keithley 2000

  • Page 1 Model 2000 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 WARRANTY Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 3 years from date of shipment. Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries, diskettes, and documentation.
  • Page 3 Model 2000 Multimeter Calibration Manual ©1994, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Fourth Printing December 2001 Document Number: 2000-905-01 Rev. D...
  • Page 4 Revision C (Document Number 2000-905-01) ............January 2001 Revision D (Document Number 2000-905-01) ............December 2001 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 Keithley products are designed for use with electrical signals that are rated Installation Category I and Installation Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and data I/O signals are Installation Category I and must not be directly connected to mains voltage or to voltage sources with high tran- sient over-voltages.
  • Page 6 To maintain protection from electric shock and fire, replacement components in mains circuits, including the power transformer, test leads, and input jacks, must be purchased from Keithley Instruments. Standard fuses, with applicable national safety ap- provals, may be used if the rating and type are the same. Other components that are not safety related may be purchased from other suppliers as long as they are equivalent to the original component.

  • Page 7: Table Of Contents

    Table of Contents Performance Verification Introduction..................1-2 Verification test requirements ..............1-3 Performing the verification test procedures .........1-6 Verifying DC voltage ................1-7 Verifying AC voltage ................1-8 Verifying DC current .................1-10 Verifying AC current................1-11 Verifying resistance ................1-12 Calibration Introduction..................2-2 Environmental conditions ..............2-3 Calibration considerations ..............2-4 Calibration code...................2-5 Comprehensive calibration ..............2-6 Front panel calibration.................2-7...
  • Page 8 List of Illustrations Performance Verification Connections for DC volts verification..........1-7 Connections for AC volts verification ..........1-8 Connections for DC current verification ........... 1-10 Connections for AC current verification..........1-11 Connections for resistance verification (100Ω-10MΩ ranges) ..1-12 Connections for resistance verification (100MΩ range) ....1-13 Calibration Low-thermal short connections ............
  • Page 9 List of Tables Performance Verification Recommended verification equipment ..........1-4 DCV reading limits................1-7 ACV reading limits ................1-9 DCI limits ..................1-10 ACI limits ..................1-11 Limits for resistance verification ............1-13 Calibration Recommended equipment for comprehensive, DC only, or AC only calibration .................2-6 Comprehensive calibration procedures..........2-7 DC volts calibration summary ............2-10 Ohms calibration summary..............2-10 DC current calibration summary ............2-11...

  • Page 10: Performance Verification

    Performance Verification...

  • Page 11: Introduction

    Performance Verification Introduction Use the procedures in this section to verify that the Model 2000 Multimeter accuracy is within the limits stated in the instrument’s one-year accuracy specifications. You can perform verifica- tion procedures: • When you first receive the instrument to make sure that it was not damaged during ship- ment, and that the unit meets factory specifications.

  • Page 12: Verification Test Requirements

    45Hz to 66Hz, or 360Hz to 440Hz. Warm-up period Allow the Model 2000 Multimeter to warm up for at least one hour before conducting the ver- ification procedures. 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 13: Recommended Verification Equipment

    Recommended test equipment Table 1-1 summarizes recommended verification equipment. Use the Fluke Model 5700A Calibrator (or the equivalent) to verify Model 2000 Multimeter measurement accuracy. You can use alternate equipment as long as that equipment has specifications at least as good as those listed in Table 1-1.

  • Page 14: Restoring Factory Defaults

    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 2000 one-year accuracy specification for 10V DC of ± (30ppm of reading + 5ppm of range), the cal- culated limits are: Reading limits = 10V ±...

  • Page 15: Performing The Verification Test Procedures

    Do not use autoranging for any verification tests because autorange hysteresis may cause the Model 2000 to be on an incorrect range. For each test signal, you must manually set the correct range for the Model 2000 using the range keys.

  • Page 16: 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 2000 to the 100mV range. Set the calibrator output to 0.00000mV DC, and allow the reading to settle.

  • Page 17: Verifying Ac Voltage

    Verifying AC voltage Check AC voltage accuracy by applying accurate AC voltages at specific frequencies from the calibrator to the Model 2000 inputs and verifying that the display reads within specified lim- its. Do not exceed 1000 V peak between INPUT HI and INPUT LO, or 8 × 10 CAUTION V•Hz input, because instrument damage may occur.

  • Page 18: Acv Reading Limits

    Performance Verification Table 1-3 ACV reading limits Reading limits (1 year, 18°C-28°C) Applied AC Range voltage 1kHz 50kHz 100mV 100.0000mV 99.9100 to 100.0900mV 99.8300 to 100.1700mV 1.000000V 0.999100 to 1.000900V 0.998300 to 1.001700V 10.00000V 9.99100 to 10.00900V 9.98300 to 10.01700V 100V 100.0000V 99.9100 to 100.0900V...

  • Page 19: Verifying Dc Current

    Verifying DC current Check DC current accuracy by applying accurate DC currents from the calibrator to the AMPS input of the Model 2000 and verifying that the display reads within specified limits. Fol- low these steps to verify DC current accuracy: Connect the Model 2000 AMPS and INPUT LO jacks to the calibrator as shown in Figure 1-3.

  • Page 20: Verifying Ac Current

    Model 2000 input and verifying that the display reads within specified limits. Follow these steps to verify the AC current: Connect the Model 2000 AMPS and INPUT LO jacks to the calibrator as shown in Fig- ure 1-4.

  • Page 21: Verifying Resistance

    Set the calibrator for 4-wire resistance with external sense on. Select the Model 2000 4-wire resistance function by pressing the Ω4 key. Set the Model 2000 for the 100Ω range, and make sure the FILTER is on. Recalculate the limits in Table 1-6 based on actual calibrator resistance values.

  • Page 22: Limits For Resistance Verification

    9.99590 to 10.00410MΩ ___________ ___________ 100MΩ 100MΩ 99.8470 to 100.1530MΩ ___________ ___________ 5700A Calibrator (Output 2-wire Resistance) Figure 1-6 Sense HI Model 2000 Connections for Input resistance verifi- cation (100M Ω Output 2000 MULTIMETER range) Input Output Sense LO Note : Use shielded cables to minimize noise.

  • Page 23: Calibration

    Calibration...

  • Page 24: Introduction

    SCPI commands sent either over the IEEE-488 bus or the RS-232 link. NOTE Manufacturing calibration is required in the field only if the Model 2000 has been re- paired. This section includes the following information: Environmental conditions: Explains the type of environment needed for calibration.

  • Page 25: Environmental Conditions

    A relative humidity of less than 80% unless otherwise noted Warm-up period Allow the Model 2000 Multimeter to warm up for at least one hour before performing cali- bration. 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 26: Calibration Considerations

    • Always let the source signal settle before calibrating each point. • Do not connect test equipment to the Model 2000 through a scanner or other switching equipment. • If an error occurs during calibration, the Model 2000 will generate an appropriate error message.

  • Page 27: Calibration Code

    ENTER. The Model 2000 allows you to 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.

  • Page 28: Comprehensive Calibration

    10V: ±82ppm 1MΩ: ±18ppm 100V: ±90ppm 700V: ±85ppm Keithley 8610 Low-thermal shorting plug *1kHz specifications. 10mV and 700V points require 1kHz only. All calibration specifications are 90-day, 23° ±5°C specifications. Canceling calibration You can cancel the calibration process at any time by pressing EXIT.

  • Page 29: Front Panel Calibration

    Setting calibration dates Preparing the Model 2000 for calibration Turn on the Model 2000, and allow it to warm up for at least one hour before performing the calibration procedure. Select the DCV function and choose SLOW as the RATE (integration time = 10 PLC).

  • Page 30: Low-Thermal Short Connections

    Calibration Front panel short and open calibration At the Model 2000 prompt for a front panel short, do 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 31: Calibrator Connections For Dc Volts And Ohms Portion Of Comprehensive Calibration

    After the front panel short and open procedure, the unit will prompt you for the first DC volt- age: +10V. Do the following: Connect the calibrator to the Model 2000 as shown in Figure 2-2. Wait three minutes to allow for thermal equilibrium before proceeding.

  • Page 32: Dc Volts Calibration Summary

    NOTE 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 2000 display value to match the calibrator output voltage. Table 2-3...

  • Page 33: Dc Current Calibration Summary

    After the 1MΩ resistance point has been calibrated, the unit will prompt you for 10mA. Fol- low these steps for DC current calibration: Connect the calibrator to the AMPS and INPUT LO terminals of the Model 2000 as shown in Figure 2-3.

  • Page 34: Connections For Ac Volts Calibration

    2-12 Calibration AC voltage calibration Follow these steps for AC voltage calibration: Connect the calibrator to the Model 2000 INPUT HI and LO terminals as shown in Fig- ure 2-4. Figure 2-4 Connections for 5700A Calibrator AC volts calibra- Input HI...

  • Page 35: Ac Current Calibration Summary

    After the 700VAC 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 2000 as shown in Figure 2-3.

  • Page 36: Scpi Command Calibration

    RS-232 port using a straight-through 9-pin to 9-pin cable (use a 9-25-pin adapter if necessary). Turn on the Model 2000, and allow it to warm up for an hour before performing calibra- tion. Select the DCV function and choose SLOW as the RATE (integration time = 10 PLC).
  • Page 37 :CAL:PROT:DC:STEP2 DC voltage calibration After front panel short and open steps, do the following: Connect the calibrator to the Model 2000 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 discon- nected at various points in this procedure by turning calibrator external sense on or off as appropriate.

  • Page 38: Calibration

    • Send the indicated programming command. (Change the command parameter if you are using a different calibration resistance than that shown.) • Wait until the Model 2000 completes each step before continuing. Table 2-9 Resistance calibration programming steps...

  • Page 39: Dc Current Calibration Programming Steps

    After the 1MΩ resistance point has been calibrated, follow these steps for DC current cali- bration: Connect the calibrator to the AMPS and INPUT LO terminals of the Model 2000 as shown in Figure 2-3. Perform the calibration steps listed in Table 2-10. For each step: •...

  • Page 40: Ac Voltage Calibration Programming Steps

    Calibration AC voltage calibration Follow these steps for AC voltage calibration: Connect the calibrator to the Model 2000 INPUT HI and LO terminals as shown in Fig- ure 2-4. Perform the calibration steps summarized in Table 2-11. For each step: •...

  • Page 41: Ac Current Calibration Programming Steps

    Calibration 2-19 Table 2-12 AC current calibration programming steps Calibrator current, Calibration step Calibration command frequency 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 com- mands: :CAL:PROT:DATE <year>, <month>, <day>...

  • Page 42: Recommended Equipment For Manufacturing Calibration

    Fluke 5700A Calibrator (see Table 2-1) to complete the comprehen- sive calibration steps. Table 2-13 Recommended equipment for manufacturing calibration Keithley 3930A or 3940 Frequency Synthesizer: 1V RMS, 3Hz: ±5ppm 1V RMS, 1kHz: ±5ppm Keithley Model 2001 or 2002 DMM: 1V, 3Hz AC, ±0.13%...

  • Page 43: Synthesizer Connections For Manufacturing Calibration

    Perform the entire front panel comprehensive calibration procedure discussed earlier in this section. Connect the synthesizer to the Model 2000 INPUT jacks as shown in Figure 2-5. Select the front input jacks with the INPUTS switch. After the last AC current calibration step, the instrument will prompt you to enter 3Hz at 1V RMS and 1kHz.
  • Page 44 Perform the entire SCPI command comprehensive calibration procedure discussed ear- lier in this section. Connect the synthesizer to the Model 2000 INPUT jacks as shown in Figure 2-5. Select the front input jacks with the INPUTS switch. Set the synthesizer output to 1V RMS at 3Hz, then send the following command: :CAL:PROT:AC:STEP14 <Cal_voltage>...
  • Page 45 Calibration Command Reference...

  • Page 46: Calibration Command Reference

    This section contains detailed information about the various Model 2000 SCPI bus calibra- tion commands. Section 2 of this manual covers detailed calibration procedures. For information about additional commands to control other instrument functions, refer to the Model 2000 User's Manual.

  • Page 47: Calibration Command Reference

    DC calibration commands: Details those commands required to calibrate the DCV, DCA, and ohms functions. AC calibration commands: Covers commands that calibrate Model 2000 ACV and ACI functions. Manufacturing calibration commands: Summarizes the commands necessary to perform the manufacturing calibration steps.

  • Page 48: Command Summary

    Calibration Command Reference Command summary Table 3-1 summarizes Model 2000 calibration commands. Table 3-1 Calibration command summary Command Description :CALibration Calibration root command. :PROTected All commands in this subsystem are protected by the calibration lock (except queries and :CODE). :CODE ‘<up to 8 char. string>’...
  • Page 49 Calibration Command Reference Table 3-1 (cont.) Calibration command summary Command Description :CALibration Calibration root command. :PROTected AC cal steps. :STEP1 10mV AC at 1kHz step. :STEP2 100mV AC at 1kHz step. :STEP3 100mV AC at 50kHz step. :STEP4 1V AC at 1 kHz step. :STEP5 1V AC at 50kHz step.

  • Page 50: Miscellaneous Calibration Commands

    • To change the code, first send the current code, then send the new code. Example :CAL:PROT:CODE 'KI002000' Send default code of KI002000. :COUNt? (:CALibration:PROTected:COUNt?) Purpose To determine how many times the Model 2000 has been calibrated. Format :cal:prot:coun? Response <n> Calibration count. Description The :COUNt? command allows you to determine how many times the Model 2000 has been calibrated.
  • Page 51 :cal:prot:lock? Response Comprehensive calibration locked. Comprehensive calibration unlocked. Description The :LOCK? query requests status from the Model 2000 on calibration locked/unlocked state. Calibration must be enabled by sending the :CODE command before calibration can be performed. Example :CAL:PROT:LOCK? Request cal lock state.
  • Page 52 Calibration Command Reference :SAVE (:CALibration:PROTected:SAVE) Purpose To save calibration constants in EEROM after the calibration procedure. Format :cal:prot:save Parameter None Description The :SAVE command stores internally calculated calibration constants de- rived during both comprehensive and manufacturing calibration in EEROM. (EEROM is non-volatile memory.) Calibration constants will be retained in- definitely once saved.
  • Page 53 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 <year> = 1994 to 2093 <month> = 1 to 12 <day> = 1 to 31 Query format :cal:prot:ndue? Response <year>, <month>, <day>...

  • Page 54: Dc Calibration Commands

    3-10 Calibration Command Reference DC calibration commands The :DC commands perform comprehensive (user) calibration of the DCV, DCI, and ohms functions. Table 3-2 summarizes these comprehensive calibration commands along with param- eter limits. Table 3-2 DC calibration commands Parameter Command Description limits :CALibration...
  • Page 55 Calibration Command Reference 3-11 :STEP1 (:CALibration:PROTected:DC:STEP1) Purpose To perform front terminal short-circuit calibration. Format :cal:prot:dc:step1 Parameter None Description :STEP1 performs the short-circuit calibration step in the comprehensive cal- ibration procedure. Connect a low-thermal short (Model 8610) to the front panel input jacks before sending this command. Example :CAL:PROT:DC:STEP1 Perform short-circuit calibration.
  • Page 56 3-12 Calibration Command Reference :STEP4 (:CALibration:PROTected:DC:STEP4) Purpose To program the -10V DC comprehensive calibration step. Format :cal:prot:dc:step4 <Cal_voltage> Parameter <Cal_voltage> = -9 to -11 [V] Description :STEP4 programs the -10V DC comprehensive calibration step. The allow- able range of the calibration voltage parameter is from -9 to -11, but -10 is recommended for best results.
  • Page 57 Calibration Command Reference 3-13 :STEP7 (:CALibration:PROTected:DC:STEP7) Purpose To program the 10kΩ 4-wire comprehensive calibration step. Format :cal:prot:dc:step7 <Cal_resistance> Parameter <Cal_resistance> = 9E3 to 11E3 [Ω] Description :STEP7 programs the 10kΩ 4-wire resistance comprehensive calibration step. The allowable range of the calibration resistance parameter is from 9E3 to 11E3, but 10E3 is recommended for best results.
  • Page 58 3-14 Calibration Command Reference :STEP10 (CALibration:PROTected:DC:STEP10) Purpose To program the 10mA comprehensive calibration step. Format :cal:prot:dc:step10 <Cal_current> Parameter <Cal_current> = 9E-3 to 11E-3 [A] Description :STEP10 programs the 10mA comprehensive calibration step. The allowable range of the calibration current parameter is from 9E-3 to 11E-3. Use the 10E-3 value whenever possible for best results.

  • Page 59: Ac Calibration Commands

    Calibration Command Reference 3-15 AC calibration commands The :AC commands perform comprehensive (user) calibration of the ACV and ACI functions. Table 3-3 summarizes these comprehensive calibration commands. Table 3-3 AC calibration commands Command Description :CALibration :PROTected :STEP 10mV AC at 1kHz calibration step. 100mV AC at 1kHz calibration step.
  • Page 60 3-16 Calibration Command Reference :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 61: Manufacturing Calibration Commands

    Calibration Command Reference 3-17 Manufacturing calibration commands 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> (CALibration:PROTected:AC:STEP<14|15>) Purpose To program individual AC manufacturing calibration steps.

  • Page 62: Bus Error Reporting

    Several methods to detect calibration errors are discussed in the following paragraphs. Error queue As with other Model 2000 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 2000 will respond with the appropriate error message, as summarized in Appendix B.

  • Page 63: Detecting Calibration Step Completion

    Calibration Command Reference 3-19 Detecting calibration step completion When sending calibration commands over the remote interface, you must wait until the in- strument completes the present operation before sending a 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 64: Generating An Srq On Calibration Complete

    An SRQ (service request) can be used to detect operation complete instead of repeatedly poll- ing the Model 2000. 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. Re-...
  • Page 65 Specifications...
  • Page 66 2000 6½-Digit Multimeter Specifications DC CHARACTERISTICS CONDITIONS: MED (1 PLC) or SLOW (10 PLC) ACCURACY: ±(ppm of reading + ppm of range) or MED (1 PLC) with filter of 10 (ppm = parts per million) (e.g., 10ppm = 0.001%) Temperature...
  • Page 67 AUTORANGE TIME Speeds include measurement and binary data transfer out the ASCII READINGS TO RS-232 (19.2k BAUD): 55/s. GPIB. MAX. INTERNAL TRIGGER RATE: 2000/s. Auto zero off. MAX. EXTERNAL TRIGGER RATE: 500/s. Sample count = 1024, auto zero off. Auto zero off, NPLC = 0.01.
  • Page 68 2000 6½-Digit Multimeter Specifications TRUE RMS AC VOLTAGE AND CURRENT CHARACTERISTICS ACCURACY : ±(% of reading + % of range), 23°C ±5 °C Voltage Range Resolution Calibration Cycle 3 Hz-10 Hz 10 Hz-20 kHz 20 kHz-50 kHz 50 kHz-100 kHz 100 kHz-300 kHz 100.0000 mV...

  • Page 69: Frequency And Period Characteristics

    2000 6½-Digit Multimeter Specifications 1, 2 FREQUENCY AND PERIOD CHARACTERISTICS Resolution Accuracy ACV Range Frequency Range Period Range Gate Time ±(ppm of reading) 90 Day/1 Year ±(%of reading) 100 mV 3 Hz 333 ms (SLOW) 0.01 750 V 500 kHz 2 µs...
  • Page 70 2000 6½-Digit Multimeter Specifications GENERAL TRIGGERING AND MEMORY POWER SUPPLY: 100V / 120V / 220V / 240V ±10%. READING HOLD SENSITIVITY: 0.01%, 0.1%, 1%, or 10% of reading. LINE FREQUENCY: 45Hz to 66Hz and 360Hz to TRIGGER DELAY: 0 to 99 hrs (1ms step size).

  • Page 71: Accuracy Calculations

    Specifications Accuracy calculations The information below discusses how to calculate accuracy for both DC and AC characteris- tics. 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 72: Calculating Dbm Characteristics Accuracy

    Specifications Calculating dBm characteristics accuracy As an example of how to calculate the actual reading limits for a 13dBm measurement with a reference impedance of 50Ω, assume an applied signal 0.998815V. The relationship between voltage and dBm is as follows: dBm = 10 log --------------------------- - From the previous example on calculating DC characteristics accuracy, it can be shown that...

  • Page 73: Calculating Db Characteristics Accuracy

    Specifications Calculating dB characteristics accuracy The relationship between voltage and dB is as follows: dB = 20 log -------------- - As an example of how to calculate the actual readings limits for dB, with a user-defined V of 10V, you must calculate the voltage accuracy and apply it to above equation. To calculate a -60dB measurement, assume 10mVRMS for a V of 10V.

  • Page 74: Optimizing Measurement Accuracy

    A-10 Specifications Optimizing measurement accuracy The configurations listed below assume that the multimeter has had factory setups restored. DC voltage, DC current, and resistance: • Select 6½ digits, 10 PLC, filter ON (up to 100 readings), fixed range. • Use REL on DC voltage and 2-wire resistance measurements. •...

  • Page 75: Optimizing Measurement Speed

    Specifications A-11 Optimizing measurement speed The configurations listed below assume that the multimeter has had factory setups restored. DC voltage, DC current, and resistance: Select 3½ digits, 0.01 PLC, filter OFF, fixed range. AC voltage and AC current: Select 3½ digits, 0.01 PLC, filter OFF, fixed range. Temperature: •...
  • Page 76 A-12 Specifications...

  • Page 77: Error Messages

    Error Messages...

  • Page 78: Error Messages

    Error Messages Introduction Errors that may occur during Model 2000 calibration are summarized in Table B-1. These er- rors may be requested by using the :SYST:ERR? query. The table shows the error number and error message string as sent by the instrument.
  • Page 79 Error Messages Table B-1 Error summary Error number Description +459 +459, “10 vac zero error” +460 +460, “10 vac full scale error” +461 +461, “10 vac noise error” +462 +462, “100 vac zero error” +463 +463, “100 vac full scale error” +464 +464, “750 vac zero error”...
  • Page 80 Calibration Program...

  • Page 81: Computer Hardware Requirements

    Calibration Program Introduction This appendix includes a calibration program written in BASIC to help you calibrate the Model 2000. Refer to Section 2 for more details on calibration procedures, equipment, and con- nections. Computer hardware requirements The following computer hardware is required to run the calibration program: •...

  • Page 82: General Program Instructions

    Be sure to use shielded IEEE-488 cables for bus connections. Turn on the computer, the Model 2000, and the calibrator. Allow the Model 2000 and the calibrator to warm up for at least one hour before performing calibration.
  • Page 83 PRINT #1, "OUTPUT 4;OPER" END SELECT IF I > 2 THEN GOSUB Settle PRINT #1, "OUTPUT 16;"; C$; Cmd$; ";*OPC" ' Send cal command to 2000. GOSUB CalEnd ' Wait until cal step ends. GOSUB ErrCheck ' Check for cal error.
  • Page 84 Calibration Program 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" PRINT #1, "OUTPUT 16;:SYST:PRES"...
  • Page 85 Calculating DC characteristics accuracy A-7 Performance Verification 1-1 Calibration 2-1 Performing the verification test procedures 1-6 Calibration code 2-5 Preparing the Model 2000 for calibration 2-7, 2-14 Calibration Command Reference 3-1 Programming the calibration code 2-5 Calibration cycle 2-6 Programming calibration dates 2-19...
  • Page 86 Saving calibration constants 2-19 SCPI command calibration 2-14, 2-22 Setting calibration dates 2-13 Software requirements C-2 Specifications A-1 Status byte EAV (Error Available) bit 3-19 Test considerations 1-6 Unlocking manufacturing calibration 2-20 Using the *OPC command 3-20 Using the *OPC? query 3-20 Verification limits 1-5 Verification test requirements 1-3 Verifying AC current 1-11...
  • Page 87 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...
  • Page 88 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...

Table of Contents