Resistance Of Temperature Sensor - Mitsubishi Electric CITY MULTI PUHY-80TMU-A Service Handbook

[4] Resistance of Temperature Sensor

Thermistor for low temperature
= 15kΩ ± 3% (TH5 ~ 8)
Thermistor R
o
1
R = 15exp {3460 (
t
273+tc
9
∗˚F= × ˚C + 32
5
Temperature (˚C)[˚F]
= 33kΩ ± 1% (TH2)
Thermistor R
o
1
R = 33exp {3965 (
t
273+tc
9
∗˚F= × ˚C + 32
5
Temperature (˚C)[˚F]
1
- )}
273+0
1
- )}
273+0
= 7.465kΩ ± 2% (TH1)
Thermistor R
120
R = 7.465exp {4057 (
t
273+tc
9
∗˚F= × ˚C + 32
5
Temperature (˚C)[˚F]
= 17kΩ ± 2% (THHS)
Thermistor R
50
1
R = 17exp {4170 (
t
273+tc
9
∗˚F= × ˚C + 32
5
Temperature (˚C)[˚F]
- 38 -
1 1
- )}
273+120
1
- )}
273+50