NI VirtualBench Calibration Procedure | © National Instruments | 51
5. Wait at least 100 milliseconds for settling.
6. Call
FGEN Run.
7. Perform a measurement with the DMM in the best available range greater than 12 V.
Compare to the limits listed in Table 18.
8. Call FGEN Enable Filter with the following parameter:
• Enable Filter = FALSE
9. Wait at least 100 milliseconds for settling.
10. Perform a measurement with the DMM in the best available range greater than 12 V.
Compare to the limits listed in Table 18.
11. Repeat steps 3 through 10 for all verification points in Table 18.
12. Call
FGEN Close.
FGEN Adjustment
This section explains how to adjust the VirtualBench FGEN. You can choose to perform these
adjustment procedures with or without performing the verification procedures first.
Note NI recommends repeating the verification procedures after you perform these
adjustment procedures. Re-verification ensures that the instrument you have
calibrated is operating within specifications after adjustments.
Note Before adjustment perform a self-calibration on the DMM performing the
adjustment.
Note Allow the VirtualBench to warm up for at least 30 minutes before adjusting.
Table 18. FGEN Gain Calibration Limits
Verification
Point (V)
FGEN
Enable Filter
Setting
1 Year Limits (V) 24 Hour Limits (V)
Lower Upper Lower Upper
+12 TRUE (On) 11.88 12.12 11.98 12.02
FALSE (Off) 11.88 12.12 11.98 12.02
-12 TRUE (On) -12.12 -11.88 -12.02 -11.98
FALSE (Off) -12.12 -11.88 -12.02 -11.98
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