Tektronix KEITHLEY DMM6500, Calibration Manual

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Section 2: Performance verification DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
2-20 DMM6500-905-01 Rev. E June 2021
2. On the DMM6500, press the
FUNCTION
key and select
DC voltage
.
3. Press the MENU key.
4. Under Measure, select
Settings
.
5. Set the range to 100 mV .
6. Set Input Impedance to Auto .
7. Set autozero to On .
8. Select Integration Rate . The Integration Rate dialog box opens.
9. Set the unit to NPLC.
10. Set NPLC to 1 PLC.
11. Select
OK and press the HOME key to return to the Home Screen.
12. Set the calibrator to output 0 V and enable the output.
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 ).
15. Press the DMM6500
FUNCTION
key and select
Temperature
.
16. Press the
MENU
key.
17. Under Measure, select
Settings
.
18. On the Measure Settings screen, set the following values:

Units: °C

Transducer: TC

Thermocouple: J

Temperature (simulated reference temperature): 0 °C

Integration Rate: 1 PLC

Auto Zero: On
19. Set the calibrator to the simulated thermocouple voltage you want (from the following table), first
correcting for the offset voltage measured in step 14. For example, if the measured offset voltage
was –2 µV, set the calibrator to –7.659 mV – (–0.002 mV), which equals –7.657 mV, to
simulate –190 °C.
20. Verify that the DMM6500 reading is within lower and upper limits.
21. Repeat steps 18 and 19 for each value in the following table.
Use the following values to verify the performance of the DMM6500. Actual values depend on
published specifications (see
Example reading limit calculation (on page 2-4)).
Simulated
temperature
Uncompensated
calibrator source
value (V)
Lower limit Upper limit