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RM-4339 Calibration Procedure
f.
Multiply
Unscaled
OffsetComp
by
SCalScaleFactor
that was calculated in step 8 and
record the value as
Scaled
OffsetComp
.
g.
Compare
Scaled
OffsetComp
to the Upper and Lower Limits from Table 7 for the
quarter-bridge configuration that is being verified. If the results are within the Upper
and Lower Limits the device passes the verification test.
h.
Clear the task by calling DAQmx Clear Task.
11. Repeat steps 3 through 10 for each quarter-bridge configuration.
12. Repeat steps 1 through 11 for each channel.
13. Set the calibrator to standby mode (STBY).
14. Disconnect the calibrator from the device.
Note
Test limits in this document
are based upon the March 2015 edition of the
NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
. Refer to
the most recent
NI PXIe-4339 and RM-4339 User Guide and Terminal Block
Specifications
online at
ni.com/manual
s
.
If the device is not operating within the specified values, refer to the
section for assistance in returning the device to NI.
Specifications
Refer to the
NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
for
detailed specification information.
Table 7.
Quarter-Bridge Shunt Calibration Accuracy Limits
Quarter-Bridge
Completion (
Ω
Calibrator
Output (
Ω
)
Nominal Value
(V/V)
Lower Limit
(V/V)
Upper Limit
(V/V)
120
116.0
0.0084746
0.0084449
0.0085042
350
338.4
0.0084253
0.0084043
0.0084464
1000
966.8
0.0084401
0.0084190
0.0084612
