Verifying Voltage Remote Sense Accuracy
Use the NI 4141 in constant voltage mode with a test circuit to simulate the voltage drop
between the device and a load.
Complete this procedure only after successfully completing all previous Verification
procedures.
Refer to the following table as you complete the following steps.
Table 4.
Voltage Remote Sense Output Verification
Level Range
Limit Range and Limit
Test Point
Load
1
Load
2
Load
3
10 V
100 mA
10 V
50 Ω
1 kΩ
50 Ω
1.
Set the first specified level range, limit range, and limit on the NI 4141.
2.
Set the level on the NI 4141 to the first specified test point.
3.
Measure the LO lead drop with
DMM1
from the negative terminal of the device to the
negative side of
Load2
. Record the measurement as
Lead Drop
.
4.
Measure the load voltage with
DMM2
across
Load2
where the sense leads connect.
Record the measurement as
Load Voltage
.
5.
Calculate the upper and lower voltage remote sense test limits using the following
equation:
Voltage Remote Sense Test Limit
= 10 V ± (0.015 V +
LO Lead Drop
× 0.001).
Record the test limits.
6.
Verify the
Load Voltage
measurement falls within the voltage remote sense test limits.
7.
If more than one test point per level range is specified, repeat the previous steps for each
test point, from setting the level to the test point on the NI 4141 up to this step.
8.
If more than one level range is specified, repeat the previous steps using the values
specified in each level range.
Connecting and Configuring Equipment to Verify Current
Remote Sense Accuracy
1.
Refer to the following figure to make the necessary connections to verify current remote
sense accuracy.
10
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NI PXIe-4141 Calibration Procedure
