©NationalInstruments Corporation 9 SCXI-1125Calibration Procedure
16. Recordbina ry1 with volt1 and binary2 with volt2 for later use.
17. Repeatsteps 7through 16 for the remaining gain values you want to
adjuston this channel.
18. Repeat steps 6 through 17 for the remaining channels you want to
adjust.
Youhave determined the newcali bration constants. Use these valuesin the
the followingsection, Adju sting Calibration Constants.
Adjusting Calibration Constants
Complete the following steps to adjust the calibration constants on the
SCXI-1125:
1. Call SCXI_Cal_Constantsto create and store the newcalibration
constants in the SCXI-1125 memory.Set the following parameters:
•SCXIchassisID—TheIDassignedbyMAX
•ModuleSlot—1, because the SCXI-1125 should be installed in
slot 1
•channel—The channel on the SCXI-1125 you want to adjust
•OpCode—2
•calibrationArea—0
•rangeCode—0 (not used for the SCXI-1125)
•SCXIgain—The gain you want to adjust
•DAQboard —The devicenumber assigned by MAX
•DAQChan —0
•DAQGain —1 for 16-bit devices, –1 for 12-bit devices
•Tbgain—1.0
•volt1 and volt2—The first and second voltage readings for the
gainvalues that you are about to save on the SCXI-1125
•binary1and binary2 —The first and second binary readings for
the gain valuesthat you are about to save on the SCXI-1125
•calConst1 and calConst2—These are return values
2. Repeatstep 1, changing calibrationArea to 1.
3. Repeatsteps 1 and 2 for the next channel.
Youhave now finished adjusting the calibration constants of your
SCXI-1125.