National Instruments 321645c-01 用户手册
Chapter 2
Function Reference — SCXI_Cal_Constants
NI-DAQ FRM for PC Compatibles
2-322
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National Instruments Corporation
SCXI_Cal_Constants
Format
status = SCXI_Cal_Constants (SCXIchassisID, moduleSlot, channel, opCode, calibrationArea,
rangeCode, SCXIgain, DAQboard, DAQchan, DAQgain,
TBgain, scaled1, binary1, scaled2, binary2, calConst1,
calConst2)
TBgain, scaled1, binary1, scaled2, binary2, calConst1,
calConst2)
Purpose
Calculates calibration constants for the given channel and range or gain using measured input
value/binary pairs. You can use this with any SCXI analog input or analog output module. The
constants can be stored and retrieved from NI-DAQ memory or the module EEPROM (if your
module has an EEPROM). The driver uses the calibration constants to more accurately scale
analog input data when you use the
value/binary pairs. You can use this with any SCXI analog input or analog output module. The
constants can be stored and retrieved from NI-DAQ memory or the module EEPROM (if your
module has an EEPROM). The driver uses the calibration constants to more accurately scale
analog input data when you use the
SCXI_Scale
function and output data when you use
SCXI_AO_Write
.
Parameters
Input
Name
Type
Description
SCXIchassisID
i16
SCXI chassis ID number
moduleSlot
i16
SCXI module slot number
channel
i16
analog input or output channel number
opCode
i16
operation to perform with the calibration
constants
constants
calibrationArea
i16
where to store or retrieve constants
rangeCode
i16
the voltage/current range for the analog output
channel
channel
SCXIgain
f64
gain setting for the SCXI analog input channel
DAQboard
i16
device number of DAQ device used to acquire
binary1 and binary2
binary1 and binary2
DAQchan
i16
DAQ device channel number used when acquiring
binary1 and binary2
binary1 and binary2
DAQgain
i16
DAQ device gain code used when acquiring
binary1 and binary2
binary1 and binary2