National Instruments PCI-1200 - Manual (Page 68)

Chapter 5 Calibration
© National Instruments Corporation 5-3 PCI-1200 User Manual
Using the Calibration Function
The Calibrate_1200 function and the 1200 Calibrate VI can either load
the calibration DACs with the factory constants or the user-defined
constants stored in the EEPROM, or you can perform your own calibration
and directly load these constants into the calibration DACs. To use the
Calibrate_1200 function or the 1200 Calibrate VI for analog input
calibration, ground an analog input channel at the I/O connector for offset
calibration and apply an accurate voltage reference to another input channel
for gain calibration. You should first configure the ADC for RSE mode,
then for the correct polarity at which you want to perform data acquisition.
To use the Calibrate_1200 function or the 1200 Calibrate VI for analog
output calibration, the DAC0 and DAC1 outputs must be wrapped back and
applied to two other analog input channels. You should first configure the
analog input circuitry for RSE and for bipolar polarity, then configure the
analog output circuitry for the polarity at which you want to perform output
waveform generation.
Refer to your software documentation for more details on the
Calibrate_1200 function and the 1200 Calibrate VI.