Service manual

INSTRUMENTATION SERVICE MANUAL NUMBER 26
Page 4D-12 90-861329--1 MARCH 1999
2. Follow these instructions:
a. With ohmmeter connected as outlined and using suitable container, thermometer
and heat source, suspend sender with tip in water.
b. Heat water and observe thermometer.
c. As temperature rises ohmmeter readings must be within the ranges specified for
each temperature (see chart below).
d. Turn heat source off. Allow water and components to cool.
NOTE: While water cools you may recheck ohmmeter readings.
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b
a
c
d
e
a-Suitable Container
b-Thermometer
c-Heat Source
d-Water Temperature Sender
e-Ohmmeter Leads
Water Temperature Ohms Reading
140°F (60°C) 121-147
194°F (90°C) 47-55
212°F (100°C) 36-41
3. Replace sender if ohmmeter readings are other than as shown for each temperature.
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