Analog Input >> General Properties >> Signal Conditioning >> Excitation >> Value

NI-DAQmx C Properties

Analog Input >> General Properties >> Signal Conditioning >> Excitation >> Value

Data Type: float64
Description: Specifies the amount of excitation that the sensor requires. If Voltage or Current is DAQmx_Val_Voltage, this value is in volts. If Voltage or Current is DAQmx_Val_Current, this value is in amperes.

You can get/set/reset this property using:
  DAQmxGetAIExcitVal
  DAQmxSetAIExcitVal
  DAQmxResetAIExcitVal