Apogee SI-4H1 Owner's Manual - Page 10

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Apogee SI-4H1 Owner's Manual

OPERATION AND MEASUREMENT

All SI-400 series radiometers have an SDI-12 output, where target and detector temperatures are
returned in digital format. Measurement of SI-400 series radiometers requires a measurement device with
SDI-12 functionality that includes the M or C command.
Wiring:
All Apogee SDI-12 infrared radiometer models (SI-400 series) have sensor-specific calibration coefficients
determined during the custom calibration process. Coefficients are programmed into the microcontroller
at the factory. Calibration data for each sensor are provided on a calibration certificate (shown on
following page).
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