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2.
Set the
niDCPower Sense
property or
NIDCPOWER_ATTR_SENSE
attribute to Remote.
3.
Make the necessary connections for this procedure, as shown in the following figure:
Figure 3. Voltage Remote Sense Diagram, Part 1
2
NI-DCPower Device
Sense LO
Sense HI
HI
LO
Load1
4.
Set the first specified level range, limit range, and limit on the PXIe-4139.
5.
Measure the internal device temperature and perform self-calibration if necessary.
a)
If the internal device temperature exceeds T
cal
±1 °C, wait up to five minutes for the
temperature to stabilize to within T
cal
±1 °C.
b)
If after five minutes the stable temperature still exceeds T
cal
±1 °C, call the self-
calibration VI or function.
6.
Set the level on the PXIe-4139 to the first specified test point.
7.
Take a voltage measurement using the PXIe-4139.
8.
Record the voltage from the previous step as
V1
.
9.
Repeat the previous three steps for the other test point specified in the range. This time,
record the value as
V2
.
10. Calculate the remote sense error using the following formula, and then record the value.
Remote Sense Error
= |
V
2 -
V
1|
11. Verify that the recorded value falls within the test limits.
12. Repeat the previous steps. This time, make the necessary connections as shown in the
following figure:
2
Follow industry best practices for minimizing thermal electromotive force (EMF) when making the
necessary connections for this procedure.
NI PXIe-4139 Calibration Procedure
|
© National Instruments
|
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