Apogee Instruments TS-100 Manual del usuario - Página 12
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An excitation voltage of 2.5 V DC is recommended to minimize self-heating and current drain, while still
maintaining adequate measurement sensitivity (mV output from thermistor per C). However, other excitation
voltages can be used. Decreasing the excitation voltage will decrease self-heating and current drain, but will also
decrease thermistor measurement sensitivity. Increasing the excitation voltage will increase thermistor
measurement sensitivity, but will also increase self-heating and current drain.
Wiring for ST-110 Serial Numbers range 0-2724
Plug each wire into the appropriate data logger terminal following the illustrations below:
Thermistor
Measurement devices (e.g., datalogger, controller) do not measure resistance directly, but determine resistance
from a half-bridge measurement, where an excitation voltage is input across the thermistor and an output voltage
is measured across the bridge resistor.
Wiring for EE08-SS
*For more information, please see the EE08-SS manual:
Blue: Analog Ground (negative thermistor lead)
Red: Excitation Channel (excitation for thermistor)
Black: Single-ended channel (positive thermistor lead)
Clear: Ground (shield wire)
White: Single-ended channel (signal output by
relative humidity sensor)
Green: Single-ended channel (signal output by
air temperature sensor)
Red: Input voltage (7 to 30 V DC)
Black: Ground
Clear: Ground (shield)