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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 k
Ω
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 k
Ω
Verification Limits
Range
Verification Point
1 Year Limits ±
(% of Calibrator
% of
Range)
24 Hour Limits ±
(Deviation from
Calibrator Output)
100 kΩ
100 kΩ
0.018 + 0.005
3.8 Ω
1 MΩ
1 MΩ
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
1 MΩ
1.3 + 0.005
1.5 kΩ
100 MΩ
1.3 + 0.005
190.3 kΩ