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Temperature Sensing Errors Section 8-3
Simple Method for Checking Temperature Sensors
Platinum Resistance Thermometer
1,2,3... 1. Connect a 100-Ω resistor between the A and B temperature sensor input
terminals and short-circuit the B terminals.
2. If the temperature sensed by the E5ZN is 0.0
°C or 32.0°F, the E5ZN is op-
erating normally.
Thermocouple
1,2,3... 1. Short-circuit the temperature sensor input terminals of the E5ZN.
2. If the E5ZN senses the temperature of the terminal block of the E5ZN, the
E5ZN is operating normally.
Settings Selector settings for the input type of temperature
sensor are incorrect.
Correct the input type setting.
Celsius-Fahrenheit designation of the E5ZN is
incorrect.
Correct the °C/°F selection switch setting.
The PV appears to be incorrect due to the input
shift setting.
Set the input shift to 0.0.
Data setting unit is incorrect. Change the program of the host.
Program of the host is incorrect.
Operation Temperature sensor input terminals of the E5ZN
thermocouple input model have been short-cir-
cuited.
Connect a thermocouple to the temperature sen-
sor input terminals.
Temperature sensor connected to the E5ZN has
been replaced or the switch or selector settings of
the E5ZN have been changed while the power is
ON.
Turn OFF the power to the E5ZN, and then turn
ON again.
Probable cause Remedy
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