Campbell Scientific SI-111 (IRR-P) Precision Infrared Radiometer - Manual (Page 9)

SI-111 Precision Infrared Radiometer
4. Wiring
Target Temperature:
Red
Differential High
Black Differential Low
Clear Analog Ground
Sensor Body Temperature:
Green Single-Ended
Blue Analog Ground
White Voltage Excitation
5. Example Programs
The example datalogger programs measure the SI-111’s thermistor to obtain
the SI-111 sensor body temperature and measure the SI-111’s thermopile to
obtain the target-to-sensor body temperature difference.
After measuring the thermopile and thermistor outputs, the sensor body
temperature is used to reference the target temperature.
Wiring for the example programs is shown in TABLE 5-1. The actual channels
used need to be adjusted for the actual installation and application.
Coefficients used to calculate the slope (m) and intercept (b) are
specific to individual SI-111 sensors. The unique coefficients for
each individual sensor are provided on the calibration sheet
shipped with the sensor. NOTE
TABLE 5-1. Wiring for Example Programs
Sensor/Lead Description CR10X CR1000
SI-111 Thermopile Target Temp
Red Diff. High 2H 2H
Black Diff. Low 2L 2L
Clear Analog Ground AG
SI-111 Thermistor Sensor Temp
Green SE 1 1
Blue Analog Ground AG
White Excitation E1 VX1 or
EX1
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