Irradiance sensitivity is calibrated with broadband light source as reference. The irradiance of the reference source is measured with a standard detector. The spectral responsivity of the Standard detector is identical to that of the test detector. The irradiance responsivity of the test detector is calculated by its signal and the irradiance measured by the standard detector.
A factory calibration certificate is supplied listing test device data, measurement set-up, traceability and calibration uncertainty.