Solution:

Please refer to page 281 of 32-bit DLL drivers' User's Manual (V1.2). Structure DEVCONFIG_AI has some description about them. Name Direction Type Range Description dwBoardID input double word Refer to Driver.H board ID code usChanConfig input unsigned short 0-single ended Analog input mode 1-differential usGainCtrMode input unsigned short 1-by jumper 0-programmable usPolarity input unsigned short 0-bipolar 1-unipolar usDasGain input unsigned short refer to gain list the gain code of in user s manual the channel on DAS card usNumExpChan input unsigned short depend on DAS channels attached device installation expansion board usCjcChannel input unsigned short cold junction channel