56
OCH670
9-7. HOW TO CHECK THE COMPONENTS
<Thermistor feature chart>
Low temperature thermistors
• Thermistor <Liquid> (TH3)
• Thermistor <2-phase pipe> (TH6)
• Thermistor <Ambient> (TH7)
0°C
15 k
"
10°C
9.6 k
"
20°C
6.3 k
"
25°C
5.2 k
"
0°C 180 k
"
25°C 50 k
"
50°C 17 k
"
70°C
8 k
"
90°C
4 k
"
30°C 4.3 k
"
40°C 3.0 k
"
Thermistor R0 = 15 k
"
± 3 %
B constant = 3480 ± 2 %
R
t
=15exp{3480( 273+t – 273 )}
1
1
Thermistor R50 = 17 k
"
± 2 %
B constant = 4150 ± 3 %
R
t
=17exp{4150( 273+t – 323)}
1
1
Thermistor R120 = 7.465 k
"
± 2%
B constant = 4057 ± 2%
R
t
=7.465exp{4057( 273+t – 393)}
1
1
Medium temperature thermistor
• Thermistor <Heatsink> (TH8)
20°C 250 k
"
30°C 160 k
"
40°C 104 k
"
50°C 70 k
"
60°C 48 k
"
70°C
34 k
"
80°C
24 k
"
90°C
17.5 k
"
100°C 13.0 k
"
110°C
9.8 k
"
High temperature thermistor
• Thermistor <Discharge> (TH4)
• Thermistor <Comp. surface> (TH33)
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
Temperature (
:
)
Resistance (k
"
)
200
150
100
50
0
25
50
75
100
125
Temperature (
:
)
Resistance (k
"
)
500
400
300
200
100
0
25
50
75
100
120
Temperature (
:
)
Resistance (k
"
)
