Apogee SI-421 Benutzerhandbuch - Seite 11

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Apogee SI series infrared radiometers are calibrated in a temperature controlled chamber that houses a

custom-built blackbody cone (target) for the radiation source. During calibration, infrared radiometers

(detectors) are held in a fixture at the opening of the blackbody cone, but are thermally insulated from

the cone. Detector and target temperature are controlled independently. At each calibration set point,

detectors are held at a constant temperature while the blackbody cone is controlled at temperatures

below (12 C), above (18 C), and equal to the detector temperature. The range of detector temperatures is

-15 C to 45 C (set points at 10 C increments). Data are collected at each detector temperature set point,

after detectors and target reach constant temperatures.