WattMaster Auto-Zone Plus, Design, Installation And Operation

Page: 175 / 180

Auto-Zone Plus Section 4
Start-Up and Troubleshooting 4-57
5.3 Temperature Sensor Resistance
Table 4-2:
Temperature Sensor Resistance
Temperature
(
º
F)
Resistance
(Ohms)
Voltage @
Input (VDC)
Temperature
(
º
F)
Resistance
(Ohms)
Voltage @ Input
(VDC)
-10 93333 4.620 72 11136 2.695
-5 80531 4.550 73 10878 2.665
0 69822 4.474 74 10625 2.635
5 60552 4.390 75 10398 2.607
10 52500 4.297 76 10158 2.577
15 45902 4.200 78 9711 2.520
20 40147 4.095 80 9302 2.465
25 35165 3.982
82 8893 2.407
30 30805 3.862 84 8514 2.352
35 27140 3.737 86 8153 2.297
40 23874 3.605 88 7805 2.242
45 21094 3.470 90 7472 2.187
50 18655 3.330 95 6716 2.055
52 17799 3.275 100 6047 1.927
54 16956 3.217
105 5453 1.805
56 16164 3.160
110 4923 1.687
58 15385 3.100 115 4449 1.575
60 14681 3.042 120 4030 1.469
62 14014 2.985 125 3656 1.369
64 13382 2.927 130 3317 1.274
66 12758 2.867 135 3015 1.185
68 12191 2.810 140 2743 1.101
69 11906 2.780
145 2502 1.024
70 11652 2.752 150 2288 0.952
71 11379 2.722
Notes:
1. Use the resistance column to check the thermistor sensor while disconnected from the
controllers (not powered).
2. Use the voltage column to check sensors while connected to powered controllers. Read
voltage with meter set on DC volts. Place the “-”(minus) lead on GND terminal and the
“+”(plus) lead on the sensor input terminal being investigated.
If the voltage is above 5.08 VDC, then the sensor or wiring is “open.” If the voltage is
less than 0.05 VDC, the sensor or wiring is shorted.
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