NI PXI-4110 Calibration Procedure
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© National Instruments
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27
Adjusting Voltage Measurement Accuracy
To adjust voltage measurement, compare a set of voltage output points as measured by an
external DMM to the measured voltage reported by the NI 4110. When taking measurements
with the NI 4110, set the Samples to Average property to
300
. Configure the voltage level using
the
Output
value for the iteration of channel
x
in Table 18. Refer to Figure 1 for the necessary
connections.
To ensure the system has had adequate time to settle, wait one second after requesting a new
voltage before taking a measurement with the DMM and the NI 4110.
Use the niDCPower Cal Adjust Voltage Measurement VI
(
niDCPower_CalAdjustVoltageMeasurement
function) to calculate the new
calibration coefficients. Pass the voltage values reported by the NI 4110 to the Reported Outputs
input of the VI, and pass the voltage values measured by the DMM to the Measured Outputs
input of the VI. Call this VI or function once per range.
Table 18.
NI 4110 Output Parameters for Voltage Measurement
Accuracy Adjustment
Channel
Iteration
Output (V)
0
1
0
2
3
3
6
1
1
0
2
10
3
20
2
1
0
2
-10
3
-20
