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Checking the sensors
Each of the three RSM sensors are interchangeable and can be tested in the
same way. The display (see pg. 7) will indicate which sensor is registering
open or short, or the temperature reading for that sensor. To test the sensor,
remove the pair of sensor wires connected to the RSM terminals. Take a
resistance reading across the detached wires going to the sensor. If the
reading shows:
OPEN or a resistance greater than 100,000Ω Ω Ω Ω Ω : Check the wires going
to the sensor. They may have been broken or become disconnected. If
the wires are fine, check the resistance at the sensor itself. If the value is
still open, the sensor has been damaged and needs to be replaced.
SHORT or a resistance less than 100Ω Ω Ω Ω Ω : Check the wires going to the
sensor. They may have become shorted together in the run of the wire.
If not, check the resistance at the sensor itself. If there still is no
resistance, the sensor has been damaged and needs to be replaced.
Resistances from 200Ω Ω Ω Ω Ω to 100,000Ω:
corresponds to the resistance value on the chart. If the sensor appears
to be outputting correctly, check that the wires were properly connected
to the RSM. If they were, the RSM may have been damaged. If the
sensor is not outputting correctly, take another reading at the sensor
itself. If this is correct, the problem is in the wiring between the sensor
and the RSM. Otherwise, the sensor has been damaged, and should be
replaced.
Ω: Ω: Find the temperature that
Ω: Ω:
For Technical Support or
Additional Product Information Contact:
Heat-Timer Corporation
20 New Dutch Lane
Fairfield, NJ 07004
Phone (973) 575-4004 Fax (973) 575 -4052
TEMPERATURE
(in degrees F)
8
VALUE
(in Ohms)
0
4 2 6 8 3
1 0
3 1 2 1 5
2 0
2 3 0 8 9
2 5
1 9 9 3 9
3 0
1 7 2 6 4
3 5
1 4 9 8 5
4 0
1 3 0 4 0
4 5
1 1 3 7 4
5 0
9 9 4 4
5 5
8 7 1 4
6 0
7 6 5 3
7 0
5 9 4 1
8 0
4 6 4 9
9 0
3 6 6 7
1 0 0
2 9 1 4
1 1 0
2 3 3 2
1 2 0
1 8 7 9
1 3 0
1 5 2 4
1 4 0
1 2 4 3
1 5 0
1 0 2 1
1 6 0
8 4 2
1 7 0
6 9 9
1 8 0
5 8 3
1 9 0
4 8 9
2 0 0
4 1 2
HT #059204
Rev A
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