NI PXIe-4154 Calibration Procedure
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© National Instruments Corporation
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After the new coefficients are calculated, commit the new coefficients to the hardware using the
process described in the
Adjusting Voltage Measurement
To adjust the voltage measurement for a calibrated NI PXIe-4154, compare a set of voltage test
points as measured by an external DMM to the measured voltage reported by the NI PXIe-4154.
Refer to Figure 2 for a connection diagram.
Refer to Table 23 for a list of the voltage test points that you must request and measure with an
external DMM and the NI PXIe-4154 to adjust a given range. For example, the 8 V range on
Channel 1 requires the adjustment application to separately request 0.1 V, 4 V, and 8 V outputs
from the NI PXIe-4154. Take measurements using an external DMM and NI PXIe-4154 at each
test point.
Note
After requesting a new voltage, wait one second to take a measurement with
an external DMM and NI PXIe-4154 to ensure the system has adequate time to settle.
After all test points are measured for a range, use the niDCPower Cal Adjust Voltage
Measurement VI or the
niDCPower_CalAdjustVoltageMeasurement
function to
calculate updated calibration coefficients. Refer to Table 24 for parameters specific to
adjustment applications for this VI. Refer to the
NI DC Power Supplies and SMUs Help
for more
information about programming references common to VIs within the NI-DCPower API.
Figure 15.
NI-DCPower Cal Adjust Voltage Measurement VI Block Diagram
Table 23.
NI PXIe-4154
Voltage Measurement Adjustment Points
Channel
V Range
Required Adjustment Test Point
s
0
6 V
0.1 V
3 V
6 V
1
8 V
0.1 V
4 V
8 V
