Thermolator TW Series UGH025-0504
6-24 TROUBLESHOOTING
PT100 SENSOR
TEST READINGS
TW CONTROL
°F (°C) Resistance
in Ohms
20 (-7) 974
25 (-4) 985
30 (-1) 996
35 (-2) 1007
40 (4) 1017
45 (7) 1028
50 (10) 1039
55 (13) 1050
60 (15) 1061
65 (18) 1071
70 (21) 1082
75 (24) 1093
80 (27) 1103
85 (29) 1115
90 (32) 1125
95 (35) 1136
100 (38) 1146
If you receive a sensor failure SF2 a possible cause may be
the process temperature sensor failed. Check with OHM
meter and see if the resistance matches the table below.
Replace if needed. In addition the sensor wiring may be
incorrect or failed. If this is the case check all wiring from
terminal strip to sensor in question. Repair as necessary.
Temperature Vs. Resistance readings
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