niDMM_ConfigureADCCalibration

ViStatus = niDMM_ConfigureADCCalibration(ViSession Instrument_Handle, ViInt32 ADC_Calibration)

Purpose

For the NI 4070/4071/4072 only, allows the DMM to compensate for gain drift since the last external calibration or self-calibration. When ADC_Calibration is ON, the DMM measures an internal reference to calculate the correct gain for the measurement. When ADC_Calibration is OFF, the DMM does not compensate for changes to the gain.

Parameters

Input
Name	Type	Description
Instrument_Handle	ViSession	Identifies a particular instrument session. You obtain the Instrument_Handle parameter from niDMM_init or niDMM_InitWithOptions. The default is None.
ADC_Calibration	ViInt32	Specifies the ADC_Calibration setting. The driver sets NIDMM_ATTR_ADC_CALIBRATION to this value. NIDMM_VAL_ADC_CALIBRATION_ON enables ADC_Calibration. NIDMM_VAL_ADC_CALIBRATION_OFF disables ADC_Calibration. If you set the value to NIDMM_VAL_ADC_CALIBRATION_AUTO, the driver determines whether to enable ADC_Calibration based on the measurement function and resolution that you configure. If you configure the NI 4070/4071/4072 for a 6½–digit and greater resolution DC measurement, the driver enables ADC Calibration. For all other measurement configurations, the driver disables ADC_Calibration. Name Value Description NIDMM_VAL_ADC_CALIBRATION_AUTO (default) -1.0 The DMM enables or disables ADC_Calibration based on the configured function and resolution. NIDMM_VAL_ADC_CALIBRATION_OFF  0 The DMM does not compensate for changes to the gain. NIDMM_VAL_ADC_CALIBRATION_ON  1 The DMM measures an internal reference to calculate the correct gain for the measurement.

Return Value

Name	Type	Description
Status	ViStatus	Reports the Status of this operation. To obtain a text description of the status code, call niDMM_error_message. To obtain additional information concerning the error condition, use niDMM_GetError.