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© National Instruments Corporation 9 SCXI-1125 Calibration Procedure
16. Record binary1 with volt1 and binary2 with volt2 for later use.
17. Repeat steps 7 through 16 for the remaining gain values you want to
adjust on this channel.
18. Repeat steps 6 through 17 for the remaining channels you want to
adjust.
You have determined the new calibration constants. Use these values in the
the following section, Adjusting Calibration Constants.
Adjusting Calibration Constants
Complete the following steps to adjust the calibration constants on the
SCXI-1125:
1. Call
SCXI_Cal_Constants
to create and store the new calibration
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 device number 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
gain values that you are about to save on the SCXI-1125
• binary1 and binary2—The first and second binary readings for
the gain values that you are about to save on the SCXI-1125
• calConst1 and calConst2—These are return values
2. Repeat step 1, changing calibrationArea to 1.
3. Repeat steps 1 and 2 for the next channel.
You have now finished adjusting the calibration constants of your
SCXI-1125.