Keithley DMM6500 Calibration Manual
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Keithley DMM6500 Calibration Manual

6 1/2-digit multimeter with scanning
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Model DMM6500
6½-Digit Multimeter With Scanning
Calibration and Adjustment Manual
DMM6500-905-01 Rev. A / July 2018
*DMM6500-905-01A*
DMM6500-905-01A

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  • Page 1 Model DMM6500 6½-Digit Multimeter With Scanning Calibration and Adjustment Manual DMM6500-905-01 Rev. A / July 2018 *DMM6500-905-01A* DMM6500-905-01A...
  • Page 2 Cleveland, Ohio, U.S.A. All rights reserved. Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part, without the prior written approval of Keithley Instruments, LLC, is strictly prohibited. These are the original instructions in English. ®...
  • Page 3 Keithley products are designed for use with electrical signals that are measurement, control, and data I/O connections, with low transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient overvoltages.
  • Page 4 (note that selected parts should be purchased only through Keithley to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement component, call a Keithley office for information.

  • Page 5: Table Of Contents

    Table of contents Introduction ......................... 1-1 Welcome ..........................1-1 Introduction to this manual ....................1-1 Extended warranty ....................... 1-1 Contact information ......................1-2 Performance verification .................... 2-1 Introduction .......................... 2-1 Verification test requirements ....................2-2 Environmental conditions ......................2-2 Warmup period .......................... 2-2 Line power..........................
  • Page 6 Table of contents Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual General adjustment considerations ..................3-3 Initial instrument setup ......................3-4 Select the correct terminals ....................... 3-4 Select the TSP command set ....................3-4 Verify instrument date and time ....................3-5 Set up remote connections .......................

  • Page 7: Introduction

    This manual provides instructions to help you calibrate and adjust your Keithley Instruments Model DMM6500. In this manual, the term "calibration" refers to the process of verifying that the accuracy of the instrument is within its one-year accuracy specifications. The term "adjustment" refers to the process of changing the calibration constants so that the accuracy of the instrument is within its one-year accuracy specifications.

  • Page 8: Contact Information

    If you have any questions after you review the information in this documentation, please contact your local Keithley Instruments office, sales partner, or distributor. You can also call the corporate headquarters of Keithley Instruments (toll-free inside the U.S. and Canada only) at 1-800-935-5595, or from outside the U.S.

  • Page 9: Performance Verification

    Front-panel calibration verification ........... 2-6 Rear-panel verification ............2-37 Introduction Use the procedures in this section to verify that DMM6500 accuracy is within the limits stated in the instrument’s one-year accuracy specifications. Specifications and characteristics are subject to change without notice; refer to the Product Support web page (https://www.tek.com/product-support)

  • Page 10: Verification Test Requirements

    Also, allow the test equipment to warm up for the time recommended by the manufacturer. Line power The DMM6500 requires a line voltage of 100 V to 240 V and a line frequency of 50 Hz, 60 Hz , or 400 Hz. Calibration verification tests should be performed within this range.

  • Page 11: Recommended Test Equipment

    Refer to the manufacturer's specifications to calculate the uncertainty, which varies for each function and range test point. Calibration verification limits The calibration verification limits stated in this section have been calculated using only the DMM6500 one-year accuracy specifications and ambient temperature ±5 °C from T (the temperature at which the instrument was calibrated).

  • Page 12: Example Reading Limit Calculation

    Example reading limit calculation Assume you are testing the 10 VDC range using a 10 V input value. Using the DMM6500 one-year accuracy specification for 10 VDC of ± (25 ppm of reading + 5 ppm of range), the calculated limits are: Reading limits = 10 V ±...

  • Page 13: Test Summary

    • Make sure the test equipment is set up for the proper function and range. • Do not connect test equipment to the DMM6500 through a scanner, multiplexer, or other switching equipment. Figure 1: VARIABLE - WARNING The front and rear terminals of the instrument are rated for connection to circuits rated Measurement Category II up to 300 V, as described in International Electrotechnical Commission (IEC) Standard IEC 60664.

  • Page 14: Front-Panel Calibration Verification

    Connect the shield to the output LO terminal of the calibrator. To verify DC voltage accuracy: 1. Use a low-thermal cable to connect the DMM6500 HI and LO INPUT terminals to the calibrator HI and LO terminals as shown in the following figure.
  • Page 15 12. Select Rel Acquire. 13. Source positive and negative full-scale and half-scale voltages and allow for proper settling. 14. Select each range on the DMM6500, allow for proper settling, and verify the ranges according to the following tables. Verify the DC voltage 100 mV range...

  • Page 16: Ac Voltage Verification

    AC voltage verification To verify AC voltage accuracy: • For the 100 mV to 100 V ranges, apply accurate voltages from the calibrator to the DMM6500 front-panel terminals. • For the 750 V range, connect the Fluke 5725A Amplifier to the calibrator. Apply accurate voltages from the calibrator terminals to the terminals on the front panel of the DMM6500.
  • Page 17 (go into standby). To verify AC voltage accuracy: 1. Connect the DMM6500 HI and LO INPUT connectors to the calibrator as shown in the following figure. Figure 3: Connections for AC voltage verification 100 mV to 100 V ranges 2.
  • Page 18 To verify AC voltage accuracy for the 750 V range: 1. Put the calibrator in Standby. 2. Connect the DMM6500 HI and LO INPUT connectors to the calibrator as shown in the following figure. 3. For 750 V at 50 kHz and 100 kHz outputs, connect the calibrator to the Fluke 5725A amplifier.
  • Page 19 Section 2: Performance verification Figure 4: Connections for AC voltage accuracy verification 750 V range 4. On the DMM6500, press the FUNCTION key and select AC voltage. 5. On the Home screen, select the button next to Range and select 750 V.

  • Page 20: Digitize Voltage Verification

    Apply accurate voltages from the calibrator to the terminals on the front panel of the DMM6500. • Verify that the displayed readings are within specified limits. Use the values in the tables following the steps below to verify the performance of the DMM6500. Actual values depend on the published specifications (see Example reading limit calculation (on page 2-4)).
  • Page 21 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 2: Performance verification 2. On the DMM6500, press the FUNCTION key, select the Digitize Functions tab, and select Digitize Voltage. 3. On the Home screen, select the button next to Range and select 100 mV.

  • Page 22: Frequency Verification

    DMM6500. • Verify that the displayed readings are within specified limits. Use the values in the table following the steps below to verify the performance of the DMM6500. Actual values depend on the published specifications (see Example reading limit calculation (on page 2-4)).

  • Page 23: Simulated Thermocouple Type J Temperature Verification

    DMM6500 specifications. To verify the simulated thermocouple Type J temperature: 1. Connect the DMM6500 HI and LO INPUT terminals to the calibrator HI and LO terminals as shown in the following figure.
  • Page 24 13. Allow five minutes for settling of the thermal voltage. 14. Record the measured offset voltage to 1 µV precision. If necessary, use the DMM6500 filter settings to reduce the noise of this measurement (for filter settings, go to MENU > Measure Calculations).

  • Page 25: Simulated Rtd Temperature Verification

    Callendar-Van Dusen equation. To verify RTD temperature accuracy, you will: • Apply accurate resistance from the calibrator to the terminals on the front panel of the DMM6500. • Verify that the displayed readings are within specified limits. RTD equations The temperature versus resistance readings listed in the RTD reference tables are calculated using the Callendar-Van Dusen equation.
  • Page 26 0.003916 0.11600 1.50594 Verify the simulated RTD temperature Use the values in the tables following the steps below to verify the performance of the DMM6500. Actual values depend on the published specifications (see Example reading limit calculation (on page 2-4)).
  • Page 27 Section 2: Performance verification Figure 8: Connections for 4-wire RTD accuracy verification 2. For 3-wire accuracy, connect the DMM6500 INPUT and SENSE terminals to the calibrator as shown in the following figure. The SENSE HI wire is not required for 3-wire RTD measurements. For 3-wire RTD, accuracy is for <...
  • Page 28 Section 2: Performance verification Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual 3. On the DMM6500, press the FUNCTION key and select Temperature. 4. Press the MENU key. 5. Under Measure, select Settings. 6. Select Transducer. 7. Set the Type to 4-wire RTD or 3-Wire RTD.

  • Page 29: Resistance Verification

    Verify that the displayed readings are within specified limits. Verify 4-wire resistance accuracy To verify 4-wire resistance accuracy: 1. Connect the DMM6500 INPUT and SENSE terminals to the calibrator as shown in the following figure. Figure 10: Connections for 4-wire resistance accuracy verification 2.
  • Page 30 Section 2: Performance verification Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual 10. For the 100 kΩ range, only verify 0 Ω with Offset Compensation set to On. 11. Set Offset Compensation to Off. 12. Verify full-scale 100 kΩ on the 100 kΩ range and 0 and full-scale for the 1 MΩ and 10 MΩ ranges.
  • Page 31 • Use shielded, Teflon-insulated or equivalent cables in a 2-wire configuration. • Apply accurate resistance from the calibrator to the terminals on the front panel of the DMM6500. • Verify that the displayed readings are within specified limits. Verify resistance 100 MΩ range To verify the 100 MΩ...

  • Page 32: Dc Current Verification

    To verify the DMM6500 specifications with zero input current, disconnect all cables and calibrators from the DMM6500 input. This is a separate setup from that used in the procedure below for mid-scale and full-scale readings.
  • Page 33 Model 8508A 200 µA range to verify the DMM6500 10 µA and 100 µA ranges. Use the Model 8508A 2 mA, 20 mA, and 200 mA ranges to verify the DMM6500 1 mA, 10 mA, and 100 mA ranges, respectively.
  • Page 34 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual 10. Note the offset-compensated reference DMM reading, and calculate limits based on DMM6500 specifications (use the reference DMM reading as the expected value and verify the DMM6500 accuracy from the calculated reference DMM current).
  • Page 35 Verify that the displayed readings are within specified limits. To verify DC current accuracy: 1. Set up the DMM6500 for DC current and the range being tested. Make sure that relative offset is disabled. 2. Connect the DMM6500 and calibrator as shown in the following figure.

  • Page 36: Digitize Current Verification

    Rear-panel verification (on page 2-37). Digitize current verification The following topics describe how to verify digitized DC current on the DMM6500. Digitize DC current verification 10 µA to 3 A ranges To verify digitize DC current accuracy: 1. Connect the DMM6500 and calibrator as shown in the following figure.
  • Page 37 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 2: Performance verification 2. Press the FUNCTION key. 3. Select the Digitize Functions tab and select Digitize Current. 4. Press the HOME key. 5. Set the Range to 10 µA.

  • Page 38: Ac Current Verification

    Verify AC current on the 100 µA to 3 A ranges To verify AC current accuracy, you will: • Apply accurate voltages from the Fluke 5720A or 5730A multifunction calibrator to the DMM6500 front-panel terminals. • Verify that the displayed readings fall within specified limits.
  • Page 39 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 2: Performance verification Use the values in the following tables to verify the performance of the DMM6500. Actual values depend on the published specifications (see Example reading limit calculation (on page 2-4)).
  • Page 40 Section 2: Performance verification Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Verify AC current 100 µA range Description Verification point Lower limit Upper limit 100 µA at 40 Hz 0.0001 9.983000E-04 1.001700E-03 100 µA at 1 kHz 0.0001...

  • Page 41: Capacitance Verification

    To compensate for capacitance offset of the cable and 1 µF thru 100 µF decade box: 1. Connect the DMM6500, shielded banana cable, banana to dual BNC cable, and 1 µF through 100 µF decade capacitor box as shown in the following diagram.
  • Page 42 Section 2: Performance verification Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual 7. Press the MENU key. 8. Select Calculations and select Rel, then Acquire. Cabling could be as high as ≈ 300 pF, which could prevent full-scale verification due to the large cable capacitance offset.

  • Page 43: Verifying Zero Values Using A 4-Wire Short

    Four-wire short verifications are not included in the Customer Calibration Data Report. To verify zero values using a 4-wire short, you will: • Check the zero values of various test points with 4-wire connections to the DMM6500 front or rear terminals. •...
  • Page 44 Section 2: Performance verification Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Figure 18: Front panel 4-wire shorting plug orientation 8. Verify that the 1 Ω range is within specification (see the following table). 9. Repeat verification for the 10 Ω to 100 kΩ ranges.

  • Page 45: Rear-Panel Verification

    3. Press the HOME key. 4. Set the range to 10A. 5. Connect the DMM6500, reference DMM, calibrator, and amplifier as shown in the following figure. Ensure cabling is designed to conduct 10 A without significant voltage drop. In general, cables for the 10 A range steps should be made of heavy gauge wire and should be as short as practical.
  • Page 46 Section 2: Performance verification Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Figure 19: Connections for DC current verification 10 A range Apply a relative offset to the DMM6500: 1. On the calibrator, select the OPR/STBY key. Ensure that the front panel displays STANDBY.

  • Page 47: Digitize Current 10 A Range Verification

    10 A range steps should be made of heavy gauge wire and should be as short as practical. To verify the 10 A range: 1. Connect DMM6500, calibrator, and amplifier as shown in the following figure. Figure 20: Connections for the 10 A range 2. Set the TERMINALS switch to REAR.

  • Page 48: Ac Current 10 A Verification

    AC current 10 A verification Verify that the displayed readings are within specified limits. Use the values in the tables following the steps below to verify the performance of the DMM6500. Actual values depend on the published specifications (see Example reading limit calculation (on page 2-4)).
  • Page 49 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 2: Performance verification 8. Connect the DMM6500 to the calibrator and amplifier as shown in the following figure. Ensure cabling is designed to conduct 10 A without significant voltage drop. In general, cables for the 10 A range steps should be made of heavy gauge wire and should be as short as practical.

  • Page 50: Adjustment

    Use the procedures in this section to adjust the DMM6500 calibration. DMM6500 performance is specified for a period of 90 days, 1 year, or 2 years from adjustment. Adjustment should be performed at one of these intervals, depending on your specification requirements.

  • Page 51: Temperature And Relative Humidity

    No direct airflow on the input terminals. Line power The DMM6500 requires a line voltage of 100 V to 240 V and a line frequency of 50 Hz, 60 Hz , or 400 Hz. The instrument must be adjusted within this range.

  • Page 52: Recommended Test Equipment

    Front/Rear switch is in the proper position before sending adjustment commands. • The Keithley Models 8610 and 8620 4-wire shorts connect all four terminals electrically, but the layout of the board traces makes DMM6500 adjustment sensitive to their orientation. Note the HI/LO terminal markings and be sure to insert connections in the correct orientation.

  • Page 53: Initial Instrument Setup

    You must also unlock calibration. Select the correct terminals On the DMM6500, you must adjust calibration from both the front and rear terminals. You can verify calibration on either the front or rear terminals. To set the instrument to the rear-panel terminals, press the TERMINALS switch on the front panel of the instrument.

  • Page 54: Verify Instrument Date And Time

    For detail on remote communications, refer to the DMM6500 Reference Manual section "Remote communications interfaces." Calibration adjustment is performed by connecting reference signals to the DMM6500 and sending a series of adjustment commands using one of the remote interfaces. The adjustment procedure may be done interactively, programmatically, or using a combination of the two.

  • Page 55: Disable Temperature Correction

    The front-panel display does not show calibration progress or completion. The following sections provide the preparation and command parameters that you need to complete adjustments to you DMM6500. The preparation sections provide information necessary for making connections and other equipment needed for that adjustment. The command parameter tables are meant to run through in any order allowing you to adjust just the parameters you need.
  • Page 56 To prepare the DMM6500 for a front-terminal adjustment with a 4-wire short: 1. Set the TERMINALS switch to FRONT. 2. Install the Keithley Model 8610 or 8620 shorting plug on the front terminals of the DMM6500 as shown in the figure below.
  • Page 57 Section 3: Adjustment Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Command parameters cal_DCV_100mV_zero_front cal_DCV_DIGI_100mV_zero cal_DCV_1V_zero_front cal_DCV_DIGI_1V_zero cal_DCV_10V_zero_front cal_sense_10V_zero_front cal_DCV_DIGI_10V_zero cal_DCV_100V_zero_front cal_DCV_DIGI_100V_zero cal_DCV_1kV_zero_front cal_DCV_DIGI_1kV_zero cal_4W_1ohm_zero_front cal_2W_10ohm_zero_front cal_4W_10ohm_zero_front cal_2W_100ohm_zero_front cal_4W_100ohm_zero_front cal_2W_1kohm_zero_front cal_3W_1kohm_zero_front cal_3W_1kohm_Hi_zero_front cal_3W_1kohm_SLO_zero_front cal_4W_1kohm_zero_front cal_2W_10kohm_zero_front cal_3W_10kohm_zero_front cal_3W_10kohm_SLO_zero_front cal_4W_10kohm_zero_front...

  • Page 58: Rear-Terminal Adjustment With A 4-Wire Short

    To prepare the DMM6500 for rear-terminal adjustment: 1. Set the TERMINALS switch to REAR. 2. Install the Keithley Model 8610 or 8620 shorting plug on the rear terminals of the DMM6500 as shown in the figure below. The shorting plug terminals must be connected so that HI and LO are correctly aligned. Zero accuracy will be affected if the shorting plug terminals are not aligned correctly.

  • Page 59: Front-Terminal Adjustment With Open Circuit Inputs

    The following section provides a command parameter table to complete the adjustment. Prepare your DMM6500 for a front-terminal adjustment with open circuit inputs To prepare the DMM6500 for a front-terminal adjustment with open circuit inputs: 1. Set the TERMINALS switch to FRONT.

  • Page 60: Rear-Terminal Adjustment With Open Circuit Inputs

    Section 3: Adjustment Command parameters for a front-terminal adjustment with open circuit inputs When calibrating your DMM6500 for a front-terminal adjustment with open circuit inputs, use the following command parameters. Send each command parameter twice. First, send the parameter using the setup command.

  • Page 61: Resistance Adjustment

    Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Command parameters for a rear-terminal adjustment with open circuit inputs When calibrating your DMM6500 for a rear-terminal adjustment with open circuit inputs, use the following command parameters. Send each command parameter twice. First, send the parameter using the setup command.
  • Page 62 5. Make sure that the OPERATE display and EX SNS keys are illuminated. Command parameters for a resistance adjustment When calibrating your DMM6500 for a resistance adjustment, use the following command parameters. Send each command parameter twice. First, send the parameter using the setup command.

  • Page 63: Dc Voltage Adjustment

    Fluke 5720 calibrator Prepare your DMM6500 for a DC voltage adjustment To prepare the DMM6500 for a DC voltage adjustment: 1. Connect a cable between the calibrator and the DMM6500 as shown in the figure below. 3-14 DMM6500-905-01 Rev. A/July 2018...
  • Page 64 2. Allow the DMM6500 to settle for five minutes. Command parameters for a DC voltage adjustment When calibrating your DMM6500 for a DC voltage adjustment, use the following command parameters. Send each command parameter twice. First, send the parameter using the setup command.

  • Page 65: Dc Current Adjustment

    Fluke 8508A Reference DMM Prepare your DMM6500 for a DC current adjustment To prepare the DMM6500 for DC current adjustment: Connect the Model DMM6500 to the calibrator as shown in the following figure. Figure 26: Connection for DC current 3-16...
  • Page 66 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 3: Adjustment Command parameters for a DC current adjustment When calibrating your DMM6500 for a DC current adjustment, use the following command parameters. Send each command parameter twice. First, send the parameter using the setup command.

  • Page 67: Dc Current 10 A Range Adjustment

    Section 3: Adjustment Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Command parameters Calibrator Calibrator Calibrator Calibrator Calibrator function range value stimulus stimulus value* value 1 mA range (+) full scale nominal cal_DCI_1mA_fs_pos DC current 0.0022 0.001 8508A...
  • Page 68 Prepare your DMM6500 for a DC current 10 A range adjustment To prepare the DMM6500 for an DC current adjustment for the 10 A range: Connect the DMM6500 to the calibrator as shown in the following figure using 10 A cables. Figure 27: Connection for a 10 A range adjustment...

  • Page 69: Ac Voltage Adjustment

    Figure 28: Connection for an AC voltage adjustment 3. Allow the instrument and cables to settle for 30 seconds. 4. On the calibrator, source 10 mV 1.0 kHz and allow the calibrator and DMM6500 to settle properly. 5. Enable the OPR key.
  • Page 70 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 3: Adjustment Command parameters for an AC voltage adjustment When calibrating your DMM6500 for an AC voltage adjustment, use the following command parameters. Send each command parameter twice. First, send the parameter using the setup command.

  • Page 71: Ac Current Adjustment

    Prepare your DMM6500 for an AC current adjustment To prepare the DMM6500 for an AC current adjustment: Connect the Model DMM6500 to the calibrator as shown in the following figure. Figure 29: Connection for AC current Command parameters for an AC current adjustment When calibrating your DMM6500 for an AC current adjustment, use the following command parameters.

  • Page 72: Ac Current 10 A Range Adjustment

    Prepare your DMM6500 for an AC current 10 A range adjustment To prepare the DMM6500 for an AC current adjustment in the 10 A range: Connect the DMM6500 to the calibrator as shown in the following figure using 10 A cables. DMM6500-905-01 Rev. A/July 2018...

  • Page 73: Frequency Adjustment

    Figure 30: Connection for a 10 A range adjustment Command parameters for an AC current 10 A range adjustment When calibrating your DMM6500 for an AC current 10 A range adjustment, use the following command parameters. Send each command parameter twice. First, send the parameter using the setup command.
  • Page 74 Prepare your DMM6500 for a frequency adjustment To prepare the DMM6500 for a frequency adjustment: 1. Connect the Keithley Instruments Model 3390 function generator to the DMM6500 INPUT HI and LO terminals as shown in the following figure. 2. Use the BNC to banana adapter at the UUT connection.

  • Page 75: Complete List Of Calibration Commands

    Complete list of calibration commands To make your adjustment procedure easier, you can copy and paste the code examples below into the Keithley Test Script Builder (TSB software). The commands can be copied and pasted two lines at a time.
  • Page 76 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 3: Adjustment cal.adjust.step.execute("cal_2W_100ohm_zero_front") --Use front-terminal 4-wire short setup cal.adjust.step.setup("cal_4W_100ohm_zero_front") cal.adjust.step.execute("cal_4W_100ohm_zero_front") --Use front-terminal 4-wire short setup cal.adjust.step.setup("cal_2W_1kohm_zero_front") cal.adjust.step.execute("cal_2W_1kohm_zero_front") --Use front-terminal 4-wire short setup cal.adjust.step.setup("cal_3W_1kohm_zero_front") cal.adjust.step.execute("cal_3W_1kohm_zero_front") --Use front-terminal 4-wire short setup cal.adjust.step.setup("cal_3W_1kohm_Hi_zero_front")
  • Page 77 Section 3: Adjustment Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual cal.adjust.step.execute("cal_diode_10mA_zero_front") --Use front-terminal 4-wire short setup cal.adjust.step.setup("cal_diode_1mA_zero_front") cal.adjust.step.execute("cal_diode_1mA_zero_front") --Use front-terminal 4-wire short setup cal.adjust.step.setup("cal_diode_100uA_zero_front") cal.adjust.step.execute("cal_diode_100uA_zero_front") --Use front-terminal 4-wire short setup cal.adjust.step.setup("cal_diode_10uA_zero_front") cal.adjust.step.execute("cal_diode_10uA_zero_front") --Use front-terminal 4-wire short setup cal.adjust.step.setup("cal_ACV_1V_zero")
  • Page 78 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 3: Adjustment cal.adjust.step.execute("cal_3W_1kohm_zero_rear") --Use rear-terminal 4-wire short setup cal.adjust.step.setup("cal_3W_1kohm_SLO_zero_rear") cal.adjust.step.execute("cal_3W_1kohm_SLO_zero_rear") --Use rear-terminal 4-wire short setup cal.adjust.step.setup("cal_4W_1kohm_zero_rear") cal.adjust.step.execute("cal_4W_1kohm_zero_rear") --Use rear-terminal 4-wire short setup cal.adjust.step.setup("cal_2W_10kohm_zero_rear") cal.adjust.step.execute("cal_2W_10kohm_zero_rear") --Use rear-terminal 4-wire short setup cal.adjust.step.setup("cal_3W_10kohm_zero_rear")
  • Page 79 Section 3: Adjustment Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual cal.adjust.step.execute("cal_DCI_1A_zero_front") --Use front-terminal 4-wire open circuit setup cal.adjust.step.setup("cal_DCI_100mA_zero_front") cal.adjust.step.execute("cal_DCI_100mA_zero_front") --Use front-terminal 4-wire open circuit setup cal.adjust.step.setup("cal_DCI_10mA_zero_front") cal.adjust.step.execute("cal_DCI_10mA_zero_front") --Use front-terminal 4-wire open circuit setup cal.adjust.step.setup("cal_DCI_1mA_zero_front") cal.adjust.step.execute("cal_DCI_1mA_zero_front") --Use front-terminal 4-wire open circuit setup cal.adjust.step.setup("cal_DCI_100uA_zero_front")
  • Page 80 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 3: Adjustment cal.adjust.step.execute("cal_DCI_1A_zero_rear") --Use rear-terminal 4-wire open circuit setup cal.adjust.step.setup("cal_DCI_100mA_zero_rear") cal.adjust.step.execute("cal_DCI_100mA_zero_rear") --Use rear-terminal 4-wire open circuit setup cal.adjust.step.setup("cal_DCI_10mA_zero_rear") cal.adjust.step.execute("cal_DCI_10mA_zero_rear") --Use rear-terminal 4-wire open circuit setup cal.adjust.step.setup("cal_DCI_1mA_zero_rear") cal.adjust.step.execute("cal_DCI_1mA_zero_rear") --Use rear-terminal 4-wire open circuit setup cal.adjust.step.setup("cal_DCI_100uA_zero_rear")
  • Page 81 Section 3: Adjustment Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual cal.adjust.step.setup("cal_4W_1Mohm_fs") cal.adjust.step.execute("cal_4W_1Mohm_fs", 1Mohm_value_read_from_calibrator) --Use resistance setup cal.adjust.step.setup("cal_source_1uA_1V") cal.adjust.step.execute("cal_source_1uA_1V", 1Mohm_value_read_from_calibrator) --Use resistance setup cal.adjust.step.setup("cal_4W_HiOhm_halfV_10Meg") cal.adjust.step.execute("cal_4W_HiOhm_halfV_10Meg",10Mohm_value_read_from_calibrato --Use resistance setup cal.adjust.step.setup("cal_user_10Meg_value") cal.adjust.step.execute("cal_user_10Meg_value", 10Mohm_value_read_from_calibrator) --Use DC voltage setup cal.adjust.step.setup("cal_DCV_DIGI_1kV_fs_pos") cal.adjust.step.setup("cal_DCV_DIGI_1kV_fs_pos") --Use DC voltage setupcal.adjust.step.setup("cal_DCV_DIGI_1kV_fs_neg") cal.adjust.step.setup("cal_DCV_DIGI_1kV_fs_neg")
  • Page 82 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 3: Adjustment cal.adjust.step.setup("cal_DCI_DIGI_10uA_fs_pos") cal.adjust.step.execute("cal_DCI_DIGI_10uA_fs_pos",value_read_from_ 8508A) --Use DC current setup cal.adjust.step.setup("cal_DCI_10uA_fs_neg") cal.adjust.step.execute("cal_DCI_10uA_fs_neg",value_read_from_ 8508A) --Use DC current setup cal.adjust.step.setup("cal_DCI_DIGI_10uA_fs_neg") cal.adjust.step.execute("cal_DCI_DIGI_10uA_fs_neg",value_read_from_ 8508A) --Use DC current setup cal.adjust.step.setup("cal_DCI_100uA_fs_pos") cal.adjust.step.execute("cal_DCI_100uA_fs_pos",value_read_from_ 8508A) --Use DC current setup cal.adjust.step.setup("cal_DCI_DIGI_100uA_fs_pos")
  • Page 83 Section 3: Adjustment Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual cal.adjust.step.setup("cal_TS5") cal.adjust.step.execute("cal_TS5") --Use DC current setup cal.adjust.step.setup("cal_DCI_1A_fs_pos") cal.adjust.step.execute("cal_DCI_1A_fs_pos") --Use DC current setup cal.adjust.step.setup("cal_DCI_DIGI_1A_fs_pos") cal.adjust.step.execute("cal_DCI_DIGI_1A_fs_pos") --Use DC current setup cal.adjust.step.setup("cal_DCI_1A_fs_neg") cal.adjust.step.execute("cal_DCI_1A_fs_neg") --Use DC current setup cal.adjust.step.setup("cal_DCI_DIGI_1A_fs_neg") cal.adjust.step.execute("cal_DCI_DIGI_1A_fs_neg") --Use DC current setup cal.adjust.step.setup("cal_DCI_DIGI_3A_fs_pos")
  • Page 84 Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 3: Adjustment cal.adjust.step.setup("cal_ACV_1V_10Hz_fs") cal.adjust.step.execute("cal_ACV_1V_10Hz_fs") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_1V_1kHz_fs") cal.adjust.step.execute("cal_ACV_1V_1kHz_fs") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_1V_50kHz_fs") cal.adjust.step.execute("cal_ACV_1V_50kHz_fs") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_1V_100kHz_fs") cal.adjust.step.execute("cal_ACV_1V_100kHz_fs") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_1V_200kHz_fs") cal.adjust.step.execute"cal_ACV_1V_200kHz_fs") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_1V_300kHz_fs")
  • Page 85 Section 3: Adjustment Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual cal.adjust.step.setup("cal_ACV_100V_1kHz_fs") cal.adjust.step.execute("cal_ACV_100V_1kHz_fs") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_700V_10Hz_1pct") cal.adjust.step.execute("cal_ACV_700V_10Hz_1pct") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_700V_1kHz_1pct") cal.adjust.step.execute("cal_ACV_700V_1kHz_1pct") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_700V_50kHz_1pct") cal.adjust.step.execute("cal_ACV_700V_50kHz_1pct") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_700V_100kHz_1pct") cal.adjust.step.execute("cal_ACV_700V_100kHz_1pct") --Use AC voltage setup cal.adjust.step.setup("cal_ACV_700V_200kHz_1pct")

  • Page 86: Enable Temperature Correction

    Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 3: Adjustment cal.adjust.step.setup("cal_ACI_200mA_1kHz_fs") cal.adjust.step.execute("cal_ACI_200mA_1kHz_fs") --Use AC current setup cal.adjust.step.setup("cal_ACI_200mA_10kHz_fs") cal.adjust.step.execute("cal_ACI_200mA_10kHz_fs") --Use AC current setup cal.adjust.step.setup("cal_ACI_1A_1kHz_tenth") cal.adjust.step.execute("cal_ACI_1A_1kHz_tenth") --Use AC current setup cal.adjust.step.setup("cal_ACI_1A_10Hz_fs") cal.adjust.step.execute("cal_ACI_1A_10Hz_fs") --Use AC current setup cal.adjust.step.setup("cal_ACI_1A_1kHz_fs") cal.adjust.step.execute("cal_ACI_1A_1kHz_fs") --Use AC current setup cal.adjust.step.setup("cal_ACI_3A_1kHz_tenth")

  • Page 87: Save Calibration And Set The Adjustment Dates

    = os.time({year = 2018, month = 1, day = 9}) The cal.verify.date command is used to record the date of the last verification that was done independently of DMM6500 adjustment. Typically, this date is set at the completion of a performance verification procedure.

  • Page 88: Adjustment Command Timing And Error Checking

    To enable prompts mode, send the localnode.prompts = 1 command. This causes the DMM6500 to return a TSP> prompt to the computer screen when it has completed a step and is ready for the next command. Prompts mode also returns a TSP? prompt if an event message is available (for example, if an error occurs during an adjustment step).

  • Page 89: Tsp Command Reference

    TSP commands The TSP commands available for the instrument are listed in alphabetic order. Introduction This section contains detailed information on the DMM6500 remote calibration commands. cal.adjust.count This attribute returns the number of times the instrument has been adjusted. Type...

  • Page 90: Cal.adjust.date

    Section 4: TSP command reference Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual cal.adjust.date This attribute contains the date when the instrument was last adjusted. Type TSP-Link accessible Affected by Where saved Default value Attribute (RW) Not applicable...

  • Page 91: Cal.adjust.step.setup()

    Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 4: TSP command reference cal.adjust.step.setup() This function sets up the specified adjustment step. Type TSP-Link accessible Affected by Where saved Default value Function Usage cal.adjust.step.setup(stepname) cal.adjust.step.setup(stepname, value) stepname The adjustment step to start value The value for this adjustment step.

  • Page 92: Cal.adjust.step.execute()

    Section 4: TSP command reference Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual cal.adjust.step.execute() This function executes the specified adjustment step. Type TSP-Link accessible Affected by Where saved Default value Function Usage cal.adjust.step.execute(stepname) cal.adjust.step.execute(stepname, value) stepname The adjustment step to start value Value for this adjustment step.

  • Page 93: Cal.lock()

    Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 4: TSP command reference cal.lock() This function prevents access to instrument calibration. Type TSP-Link accessible Affected by Where saved Default value Function Usage cal.lock() Details Calibration data is locked during normal operation. To perform calibration, you must unlock calibration.

  • Page 94: Cal.password

    Section 4: TSP command reference Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual cal.password This attribute sets the password that you send when you unlock calibration. Type TSP-Link accessible Affected by Where saved Default value Attribute (W) Not applicable...

  • Page 95: Cal.save()

    Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 4: TSP command reference cal.save() This function saves the calibration constants. Type TSP-Link accessible Affected by Where saved Default value Function Usage cal.save() Details This command stores the internally calculated calibration constants that were derived during the comprehensive calibration procedure.

  • Page 96: Cal.unlock()

    Section 4: TSP command reference Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual cal.unlock() This attribute unlocks calibration operations. Type TSP-Link accessible Affected by Where saved Default value Function Usage cal.unlock("password") password A string containing the password to unlock calibration Details Calibration data is locked during normal operation.

  • Page 97: Cal.verify.date

    Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 4: TSP command reference cal.verify.date This attribute contains the date of the last calibration verification. Type TSP-Link accessible Affected by Where saved Default value Attribute (RW) Not applicable Nonvolatile memory...
  • Page 98 Section 4: TSP command reference Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Example 1 cal.verify.date = os.time({year=2018, month=9, day=5}) print(cal.verify.date) Set the verify calibration date to September 5, 2018. Verify the date. Example output: Sep 5 2014 12:00:00.000 Example 2 cal.verify.date = os.time()
  • Page 99 All Keithley trademarks and trade names are the property of Keithley Instruments. All other trademarks and trade names are the property of their respective companies. Keithley Instruments Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168 • 1-800-935-5595 • www.tek.com/keithley 12/17...

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