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Circuit Descriptions
1) The sensor uses the characteristics of thermistor. If temperature goes higher, resistance goes
lower. On the contrary, if temperature goes lower, resistance goes higher.
2) A MICOM input voltage is calculated by sensor as follows.
(V
CC : 5V, RTH : Sensor reisitance)
3) For the resistance data corresponding to a temperature and a MICOM input voltage, please
refer the conversion table on the back.
RTH
VF = X Vcc
RTH + R301
When Sensor is open
MICOM input “HIGH”
When sensor is cut off
MICOM input “LOW”
( Air Sensor)
10-5) Temperature Sensing Circuit
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