Scarab Flight Model is a four channels scanning radiometer, launched in February 1994, with the same ERBE scientific mission. It worked perfectly during one year, aboard a Russian satellite, METEOR 3 N degrees 7. Data wee very consistent with ERBE results. Calibration of FM2 and Spare Model is described. The calibration comprises three phases: solar/diffuser short wave source; blackbodies long wave sources under vacuum; integrating sphere short wave source. Results are described and a comparison between the tow last methods is established.