5.
Compare a DMM voltage measurement to the voltage measurement test limits.
a)
Take a voltage measurement using the DMM.
b)
Calculate the lower and upper voltage measurement test limits using the following
formula:
Voltage Measurement Test Limits
=
Test Point
± (|
Test Point
| *
% of Voltage
+
Offset
)
c)
Verify the DMM measurement falls within the test limits.
6.
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 PXIe-4137 up to this step.
7.
If more than one level range is specified, repeat the previous steps using the values
specified in each level range.
Verifying Remote Sense Voltage Offset
Use the PXIe-4137 in constant current mode with a test circuit to simulate the voltage drop
between the device and a load.
Refer to the following table as you complete the following steps.
Verify ranges in the order listed in the table. Use the same connections as the previous test.
Table 3. Remote Sense Voltage Offset Verification
Level Range
Limit Range
and Limit
Test Point
As-Found
Measurement Test
Limit
As-Left Measurement
Test Limit
600 mV
1 mA
0 V
±30 μV
±11.5 μV
6 V
±90 μV
±50 μV
20 V
±400 μV
±165 μV
200 V
±2.5 mV
±1.25 mV
1.
Set the first specified level range, limit range, and limit on the PXIe-4137.
2.
Set the
niDCPower Sense
property or
NIDCPOWER_ATTR_SENSE
attribute to Remote.
3.
Set the level on the PXIe-4137 to the first specified test point.
4.
Compare a DMM voltage measurement to the voltage measurement test limits.
a)
Take a voltage measurement using the DMM.
b)
Verify the DMM measurement falls within the test limits.
5.
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 PXIe-4137 up to this step.
6.
If more than one level range is specified, repeat the previous steps using the values
specified in each level range.
Verifying Voltage Remote Sense
Use the PXIe-4137 in constant current mode with a test circuit to simulate the voltage drop
between the device and a load.
NI PXIe-4137 Calibration Procedure
|
© National Instruments
|
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