Temperature vs. resistance table, Testing and troubleshooting – tekmar 095 Replacement Kit for Snow Sensor User Manual
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© 2013
M3065_D - 06/13
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Temperature vs. Resistance Table
Temperature Resistance
°F
°C
-50
-46
490,813
-45
-43
405,710
-40
-40
336,606
-35
-37
280,279
-30
-34
234,196
-25
-32
196,358
-20
-29
165,180
-15
-26
139,402
-10
-23
118,018
-5
-21
100,221
0
-18
85,362
5
-15
72,918
10
-12
62,465
15
-9
53,658
20
-7
46,218
25
-4
39,913
30
-1
34,558
35
2
29,996
40
4
26,099
Temperature Resistance
°F
°C
45
7
22,763
50
10
19,900
55
13
17,436
60
16
15,311
65
18
13,474
70
21
11,883
75
24
10,501
80
27
9,299
85
29
8,250
90
32
7,334
95
35
6,532
100
38
5,828
105
41
5,210
110
43
4,665
115
46
4,184
120
49
3,760
125
52
3,383
130
54
3,050
135
57
2,754
Temperature Resistance
°F
°C
140
60
2,490
145
63
2,255
150
66
2,045
155
68
1,857
160
71
1,689
165
74
1,538
170
77
1,403
175
79
1,281
180
82
1,172
185
85
1,073
190
88
983
195
91
903
200
93
829
205
96
763
210
99
703
215
102
648
220
104
598
225
107
553
If the Snow Melt Control shows an error message describing a sensor failure, perform the
following test procedure:
The 4 conductor wires at the sensor should be disconnected.
Use a good quality electrical testing meter with an ohm scale range of 0 to 2,000,000
Ohms.
Using the ohmmeter and standard testing practices, measure the resistance between:
1. The yellow (YEL) and black (BLK) wiring terminals to measure a 10 kΩ sensor and use
the Temperature vs. Resistance Table to calculate the approximate temperature reading.
Measure the surface temperature of the 095 blue sensor disk and compare versus the
yellow to black temperature reading.
2. Measure the resistance between the blue (BLU) and black (BLK) wiring terminals. When
the sensor surface is clean and dry, the reading should be 2,000,000 Ohms. When the
sensor surface is wet it should be between 10,000 and 300,000 Ohms.
3. Measure the resistance between the red (RED) and black (BLK) wiring terminals This
reading should be between 45 to 47 Ohms.
If resistance readings are outside of the normal operating range, the sensor has failed.
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Testing and Troubleshooting