Table 2. Voltage Output and Measurement Verification (Continued)
Level
Range
Limit
Range and
Limit
Test Point
As-Found
Measurement Test
Limit (% of V
Offset)
As-Left Measurement
Test Limit (% of Voltage
+ Offset)
200 V
2
1 mA
-200 V
0.020% + 2.5 mV
0.0065% + 1.25 mV
0 V
200 V
1.
Set the first specified level range, limit range, and limit on the PXIe-4135.
2.
Set the
niDCPower Sense
property or
NIDCPOWER_ATTR_SENSE
attribute to Local.
3.
Measure the internal device temperature and perform self-calibration if necessary.
a)
After measuring the internal device temperature, wait for the internal device
temperature to stabilize. Temperature is considered stable when it has not changed
by more than ±1 °C in the previous 5 minutes.
b)
After the internal temperature has stabilized, if the temperature still exceeds
T
cal
± 1 °C, call the self-calibration VI or function.
4.
Set the level on the PXIe-4135 to the first specified test point.
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-4135 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
Compare a set of voltages measured by a DMM to the voltage test points requested by the
PXIe-4135.
Verify level ranges in the specified order. Use the same connections as the previous test.
Refer to the following table as you complete the following steps:
2
Ensure that the safety interlock terminal is closed when verifying the 200 V range.
PXIe-4135 Calibration Procedure
|
© National Instruments Corporation
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