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NI PXIe-4154 Calibration Procedure
Figure 12.
NI-DCPower Cal Adjust Current Measurement VI Block Diagram
When the new coefficients are calculated, commit them to the hardware using the process
described in the
section.
Adjusting Voltage Output
To adjust the voltage output of a calibrated NI PXIe-4154, compare a range of requested voltage
test points to the measurements of the actual voltage at the output by an external DMM. Refer
to Figure 2 for a connection diagram.
Refer to Table 19 for an outline of the voltage test points that you must request and measure for
each range. For example, the 6 V range on Channel 0 requires the adjustment application to
separately request 0.1 V, 3 V, and 6 V outputs from the NI PXIe-4154. Take measurements using
the external DMM at each voltage test point.
Note
Do not use the NI-DCPower SFP to request test points for adjusting voltage
outputs.
Note
After requesting a new voltage, wait one second to take a measurement with
an external DMM to ensure the system has adequate time to settle.
Table 18.
NI-DCPower Cal Adjust Current Measurement VI Parameter Descriptions
Parameter
Description
range
The range to be adjusted with these settings
.
reported outputs
Array of measurements taken by the NI PXIe-4154
corresponding to required adjustment test points in Table 17
measured outputs
Array of measurements made by an external DMM
corresponding to required adjustment test points in Table 17. For
zero current test points, a measured output of exactly zero should
be entered as all connections to the NI PXIe-4154 should be
removed to take this measurement.
number of
measurements
The number of elements in
reported outputs
and
measured
outputs
.
