NI-DAQ™mx C Reference

Self Calibration >> Last Self Calibration Temperature

Data Type: float64
Description: Indicates in degrees Celsius the temperature of the device at the time of the last self-calibration. Compare this temperature to the current onboard temperature to determine if you should perform another calibration.
Restrictions: Not Settable

You can get this property using:
  DAQmxGetSelfCalLastTemp