Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 129)

daqCalGetCalEquation
Also See: Other daqCal commands
Format
daqCalGetCalEquation(handle, chanConfig, tableType, calEquation)
Purpose
daqCalGetCalEquation retrieves the calibration equation from the currently selected calibration table
chosen by the daqCalSelectCalTable function.
Parameter Summary
Parameter Type Description
handle DaqHandleT Handle to the device from which ADC transfer status
will be retrieved
chanConfig DaqCalChanConfigT Configuration info which includes channel and gain.
tableType DaqCalTableTypeT Calibration table type to use
calEquation DaqCalEquationType Defines the equation type to use
Parameter Values
handle: obtained from the daqOpen function
chanConfig: channel configuration information (see chanConfig table, below)
tableType: s ee tableType table below
calEquation: see DaqCalEquationType below
Parameter Type Definitions
chanConfig - DaqCalChanConfigT
Definition Description
DaqCalType dctAdc = 0; dctDac = 1; dctTrigger = 2; dctVref = 3; dctTime = 4 (for time stamp)
channel Channel number to which the equation will be applied
gain Channel gain
flags Channel flags, as applicable
extendedFlags The Channel’s extended flags, as applicable.
tableType - DaqCalTableTypeT
Definition Description
DcttFactory Selects the factory calibration table. The factory calibration table reflects factory calibration
constants for the selected device. This is the default setting.
DcttUser Selects the user-calibration table. The user-calibration table reflects calibration constants defined
by the user or the device’s user-calibration application. Refer to the device’s calibration
documentation for specific settings.
DcttSelfCal Self-calibration constants.
calEquation - DaqCalEquationType
Definition Description
dcetConstant = 0; used to select constant
dcetLinear = 1; used to select linear slope and offset
dcetSplitLinear = 2; slope positive, slope negative; offset
dcetNonZeroSplitLinear = 3; slope positive, slope negative, offset positive, offset negative; split
dcetTime = 4; time stamp: year, month, day, hour, minute, second, milli-second
Function Usage
To retrieve an existing calibration equation.
Programmer’s Manual 908494 Daq API Command Reference 4.3-3