14 | ni.com | NI VirtualBench Calibration Procedure
18. Output 100 kΩ verification point on the calibrator.
19. Call
DMM Configure Measurement with the following parameters:
• Function =
Resistance
• Auto Range = FALSE
• Manual Range = 100 kΩ
20. Call
DMM Read 20 times. Calculate and record the average value. Subtract the average
value measured in step 17. Verify that the result falls between the limits listed in Table 7.
Note Use the values in the 24 Hour Limits column for a post-adjustment
verification only. Otherwise, use the values in the 1 Year Limits column.
Note Limits are provided for resistance instead of absolute limits because the limits
depend on the actual resistance value output by your calibrator.
21. Repeat steps 18 through 20 for each verification point on that range listed in Table 7.
22. Repeat steps 13 through 21 for each range listed in Table 7.
23. Reset the calibrator for safety reasons.
24. Disconnect all cables from the calibrator and VirtualBench.
You have completed verifying the resistance function of the VirtualBench.
Table 7. VirtualBench Resistance >19 kΩ Verification Limits
Range Verification Point
1 Year Limits ±
(% of Calibrator
Output + % of
Range)
24 Hour Limits ±
(Deviation from
Calibrator Output)
100 kΩ 100 kΩ 0.018 + 0.005 3.8 Ω
1MΩ 1MΩ 0.035 + 0.005 100 Ω
10 MΩ 100 kΩ 0.150 + 0.005 120 Ω
10 MΩ 0.150 + 0.005 10 kΩ
100 MΩ 1MΩ 1.3 + 0.005 1.5 kΩ
100 MΩ 1.3 + 0.005 190.3 kΩ
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