TM 10-8145-222-23
0004
MAINTAINER TROUBLESHOOTING MALFUNCTION/SYMPTOM INDEX CONTINUED
Table 3. Sensor Voltage Chart for Suction Pressure Transducer.
NOTE
Due to variations and inconsistencies in test equipment, the headings taken should
approach the table values. Also, an accurate low pressure gauge will give an idea of
how accurate the pressure transducer is at responding to the true suction pressure.
PSIG
Voltage
PSIG
Voltage
PSIG
Voltage
20" hg.
0.369
30
0.761
70
1.155
10" hg.
0.417
35
0.81
75
1.204
0
0.466
40
0.86
80
1.253
5
0.515
45
0.909
85
1.303
10
0.564
50
0.958
90
1.352
15
0.614
55
1.007
95
1.401
20
0.663
60
1.056
100
1.45
25
0.712
65
1.106
Table 4. Sensor Resistance Chart for Air Temperature, Return Air, Supply Air, and Water Temperature
Sensor.
NOTE
Due to variations and inaccuracies in test equipment, a reading within two percent of
the chart value would indicate a good sensor.
Temperature
Temperature
F
C
Ohms
F
C
Ohms
-20
-28.9
165.3K
40
4.4
26.1K
-18
-27.8
154.0K
42
5.5
24.7K
-16
-26.7
144.0K
44
6.7
23.4K
-14
-25.6
134.4K
46
7.8
22.1K
-12
-24.4
126.1K
48
8.9
21.0K
-10
-23.3
117.8K
50
10.0
19.9K
-8
-22.2
110.5K
52
11.1
18.9K
-6
-21.1
103.7K
54
12.2
18.0K
-4
-20.0
97.1K
56
13.3
17.0K
-2
-18.9
91.0K
58
14.4
16.1K
0
-17.8
82.8K
60
15.6
15.3K
2
-16.7
80.2K
62
16.7
14.5K
4
-15.6
75.3K
64
17.8
13.8K
