Patent ID: 7038196

Claim:
A method for calibrating an irradiance level control in a client accelerated weathering test apparatus, comprising the steps of: installing a calibration light source in a factory accelerated weathering test apparatus; operating the factory accelerated weathering test apparatus at a fixed power level as determined by a first calibrated device; collecting a first full spectrum power distribution (“SPD”) of the calibration light source; generating a first group of measurements from the first full SPD; storing the first group of measurements as a first data set; installing the calibration light source in a client accelerated weathering test apparatus; operating the client accelerated weathering test apparatus at the fixed power level as determined by a second calibrated device; collecting a second full SPD for the calibration light source; generating a second group of measurements from the second full SPD; storing the second group of measurements as a second data set; filtering the first and second data sets; aligning the first and second filtered data sets; and determining a system response factor of the client accelerated weathering test apparatus in order to calibrate the irradiance level control of the client accelerated weathering test apparatus.