SCXI-1141/1142/1143 Calibration Procedure
12
ni.com
You have finished measuring the gain on the SCXI-1141/1142/1143.
Adjusting Calibration Constants
Complete the following steps to adjust the calibration constants on the
SCXI-1141/1142/1143 to compensate for the gain error measured in the
section:
1.
Reconnect the E Series DAQ device to the SCXI-1141/1142/1143.
2.
Call
SCXI_Cal_Constants
to create and store the new calibration
constants in the SCXI-1141/1142/1143 memory. Use the following
parameters:
•
SCXIchassisID
—The ID assigned by MAX
•
moduleSlot
—1, unless you installed the module in a different slot
•
channel
—The channel you want to adjust
•
opCode
—2
•
calibrationArea
—0
•
rangeCode
—0 (not used for the SCXI-1141/1142/1143)
•
SCXIgain
—The gain setting you want to adjust
•
DAQboard
—The device number assigned by MAX
•
DAQChan
—0
•
DAQGain
—1 for 16-bit devices
•
Tbgain
—1.0
•
volt1
and
volt2
—The first and second voltage readings for the
gain values that you are saving on the SCXI-1141/1142/1143
•
binary1
and
binary2
—The first and second binary readings for
the gain values that you are saving on the SCXI-1141/1142/1143
•
calConst1
and
calConst2
—The return values
3.
Repeat step 2, changing
calibrationArea
to 1.
4.
Repeat step 2, changing
calibrationArea
to 3.
5.
Repeat steps 2 through 4 for the next channel.
6.
Repeat steps 2 through 5 for the next gain setting.
You have finished adjusting the calibration constants on the
SCXI-1141/1142/1143.
