NI-DAQ™mx C Reference

Analog Output >> General Properties >> Advanced >> Device Scaling Coefficients >> Device Scaling Coefficients

Data Type: float64*
Description: Indicates the coefficients of a linear equation that NI-DAQmx uses to scale values from a voltage to the native format of the device. Each element of the array corresponds to a term of the equation. The first element of the array corresponds to the y-intercept, and the second element corresponds to the slope. Scaling coefficients do not account for any custom scales that may be applied to the channel.
Restrictions: Not Settable

You can get this property using:
  DAQmxGetAODevScalingCoeff