National Instruments Module SCXI-1125, Процедура калибровки, Страница: 10 / 18

SCXI-1125 Calibration Procedure 10 ni.com
10. Acquire 1000 points of voltage data using the Analog 1D DBL 1Chan
NSamp instance of the DAQmx Read VI.
11. Compute the mean of the 1000 voltage values that you acquired.
12. Compare the resulting average to the upper and lower limits listed in
Table 2. If the result is between the upper and lower limits, the
SCXI-1125 passes the test.
13. Clear the acquisition using the DAQmx Clear Task VI.
14. Repeat steps 4 through 13 for the remaining channels.
15. Repeat steps 3 through 14 for all test points in Table 2.
You have finished verifying the analog input accuracy of the SCXI-1125.
Adjustment Procedure
The adjustment procedure adjusts the gain and offset calibration constants
on the SCXI-1125. Complete the
Verification Procedure prior to the
adjustment procedure to determine the pre-calibration accuracy and
whether adjustments are necessary.
LabVIEW Block Diagram NI-DAQmx Function Call
Call
DAQmxReadAnalogF64
with the following
parameters:
taskHandle :
taskHandle
numSampsPerChan :
–1
timeout :
10.0
fillMode :
DAQmx_Val_GroupByChannel
readArray :
data
arraySizeInSamples :
1000
sampsPerChanRead :
&read
reserved :
NULL
LabVIEW Block Diagram NI-DAQmx Function Call
Call
DAQmxClearTask
with
the following parameter:
taskHandle :
taskHandle