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738.955 | 10.40
EN
9.2
Testing
the
temperature
sensor
9.2.1
Safety
Only professional personnel may test the temperature
sensor.
9.2.2
Testing
the
resistance
values
DANGER
Risk
of
death
by
electrocution!
Disconnect the controller from the power supply
before opening the casing.
The temperature is recorded by type Pt1000 resistance
sensors. The resistance value of the sensor changes
depending on the temperature. A potentially defective
sensor can be checked using an ohmmeter.
Measuring
resistance
values
Disconnect the corresponding temperature sensor
from the controller.
Measure the resistance value. The typical resistance
values, depending on the temperature, are listed in
the following table. Please note that small devia-
tions are permissible.
Содержание TR A301
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