Omron Sysmac CJ Series, Operation Manual

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Troubleshooting Section 5-2
Here is a simple method to check the temperature sensor inputs:
With a resistance-thermometer Unit, connect a 100-
Ω
resistor to the A-B
temperature sensor input terminals and short the B-B terminals. The Tem-
perature Control Unit is operating normally if the measured temperature is
at the 0.0
°
C or 32.0
°
F level.
With a thermocouple Unit, short the temperature sensor input terminals.
The Temperature Control Unit is operating normally if the measured tem-
perature is the temperature in the vicinity of the terminal block.
Usage There is a thermocouple input and the input termi-
nals are shorted. Connect a thermocouple.
The temperature sensor was replaced or switch
settings were changed while the power was ON. Turn the power OFF and then ON again.
Step Possible Cause Remedy