SCXI-1520 Calibration Procedure
12
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15. Set the calibrator to output the test point voltage from Table 2.
16. Call
SCAN_Op
to acquire the data. Set the following parameters:
•
deviceNumber
—The device number of the DAQ device
•
numChans
—{1}
•
chans
—{0}
•
gains
—1
•
buffer
—[5000]
•
count
—5000
•
sampleRate
—10000
•
scanRate
—5000
17. Call
DAQ_VScale
to scale the data returned by
SCAN_Op
. Set the
following parameters:
•
deviceNumber
—The value assigned to the DAQ device by MAX
•
chan
—0
•
gain
—1
•
gainAdjust
—1
•
offset
—0
•
count
—5000
•
binArray
—The array returned by
SCAN_Op
The result is
voltArray
, a set of scaled voltages measured with respect
to the output of the SCXI module.
18. Average the results returned by
DAQ_VScale
.
19. Record the averaged voltage from step 18 as
V
mp
and the calibrator
voltage as
V
inp
.
20. Set the calibrator to the negative test-point value for the same gain.
21. Repeat steps 16 through 18.
22. Record the averaged voltage from step 18 as
V
mn
and the calibrator
voltage as
V
inn
. You now have two pairs of data points, (
V
mp
,
V
inp
) and
(
V
mn
,
V
inn
), to use in the
section.
23. Repeat steps 14 through 22 for the remaining gains you want to adjust
on this module.
24. Repeat steps 7 through 23 for the remaining channels you want to
adjust on this module.