Possible causes: display meter and pt100 RTD wiring is wrong or pt100 RTD has a short circuit phenomenon;
Treatment: correct wiring, or find out where the short-circuit, strengthen the insulation.
2, fault phenomenon: pt100 RTD table indicates infinity;
Possible causes: pt100 RTD or lead wire short circuit or loose terminals, etc.;
Treatment: replacement of the resistor body or welding and tightening of the wiring screws and so on.
3, the failure phenomenon: display pt100 RTD indication value than the actual value of low or unstable value;
Possible causes: the protection of the tube metal chips, dust, dirt between the terminals and RTD short-circuit;
Processing methods: remove the metal chips, dust, water droplets, etc., to find the short-circuit point to strengthen the insulation.
4, failure phenomenon: pt100 thermal resistance value and temperature changes;
Possible causes: pt100 thermal resistance wire material corrosion and deterioration;
Treatment: replacement of the pt100 RTD.