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Part # 4521056 Rev 2(02/21/12)
Page 10
SENSOR DATA
The sensor used on the model is an NTC (negative
temperature coeffi
cient) thermistor. This is a sensor whose
resistance decreases with an increase in temperature.
The sensing circuit is arranged as a voltage divider circuit
shown below. The data chart shows the thermistor resistance
out of the circuit, in the circuit and voltage measured at the
input if the circuit is energized versus temperature.
I8
I6,
-
1
2V
R
1
R2
VR
1
C
1
22uf
1
0k
temperature
sense
11
k,
1%
+1
2VDC
c
omputer
interna
l
resistan
c
e
76k
ohm
t
20k
1%
Temperature - Resistance/Voltage Table
Temperature - Resistance/Voltage
Temperature
Resistance
Out Of
Circuit
In-Circuit
Resistance
Voltage
In Circuit
(I8 to -)
°C
°F
150
302
187.2
185.01
0.20
145
293
210.3
207.54
0.22
140
284
236.9
233.41
0.25
135
275
267.5
263.06
0.28
Temperature - Resistance/Voltage
Temperature
Resistance
Out Of
Circuit
In-Circuit
Resistance
Voltage
In Circuit
(I8 to -)
°C
°F
130
266
303.0
297.31
0.32
125
257
344.2
336.88
0.36
120
248
392.2
382.72
0.40
115
239
448.3
435.96
0.46
110
230
514.1
497.93
0.52
105
221
591.6
570.29
0.59
100
212
683.1
654.85
0.67
95
203
791.6
753.91
0.77
90
194
920.9
870.28
0.88
85
185
1075
1006.65
1.01
80
176
1261
1167.98
1.15
75
167
1485
1357.67
1.32
70
158
1756
1580.69
1.51
65
149
2087
1843.95
1.72
63
145
2256
1974.84
1.83
60
140
2491
2152.37
1.96
55
131
2989
2514.34
2.23
50
122
3604
2935.76
2.53
45
113
4369
3424.15
2.85
40
104
5326
3985.40
3.19
35
95
6530
4623.27
3.55
30
86
8056
5339.34
3.92
25
77
10000
6129.03
4.29
20
68
12500
6985.29
4.66
15
59
15720
7888.23
5.01
10
50
19920
8821.56
5.34
5
41
25440
9759.33
5.64
0
32
32740
10672.18
5.91
-5
23
42470
11533.50
6.14
-10
14
55580
12322.86
6.34
-15
5
73390
13023.59
6.51
-20
-4
97820
13627.55
6.64
-25
-13
131700
14134.09
6.75
Summary of Contents for EFW800
Page 14: ...Part 4521056 Rev 2 02 21 12 Page 14...
Page 15: ...Part 4521056 Rev 2 02 21 12 Page 15 WIRING DIAGRAM I1 I2 I3 I4 I5 I6 I7 I8 Q2 Q3 Q4 Q1...
Page 16: ...Part 4521056 Rev 2 02 21 12 Page 16 MODEL EFW800 EFW800 PARTS BREAKDOWN...
Page 18: ......
Page 19: ......
Page 21: ...Pi ce n 4521056 Rev 2 02 21 12 Page 16 Mod le EFW800 CLAT DES PI CES DU MOD LE EFW800...
Page 22: ...Pi ce n 4521056 Rev 2 02 21 12 Page 15 SCH MA DE C BLAGE I1 I2 I3 I4 I5 I6 I7 I8 Q2 Q3 Q4 Q1...