Pt100 thermal resistance of four common fault phenomenon and the countermeasures

Pt100 is becoming more and more widely in use in the production of thermal resistor, gradually become the industry one of the most commonly used temperature detecting element, it has high measurement precision, wide measuring range, simple structure, convenient use, etc. We know through various channels and analysis products, for the majority of netizens to present various industry knowledge.

the pt100 resistance four common fault phenomenon and countermeasure of

1, fault phenomenon: display pt100 thermal resistance of the indicated value is lower than the actual value or unstable value; Possible reasons: protecting tube with metal scraps, dust, dirt, pt100 heat resistance between the terminal short circuit; Methods: to remove scrap metal, cleaning dust, water, etc. , find the short circuit point reinforced insulation.

2, fault phenomenon: pt100 thermoelectric resistance changes with the temperature relation; Possible reasons: pt100 metamorphic thermal resistance wire material corrosion; Methods: change of pt100 thermal resistance.

3, fault phenomenon: display instrument indicates a negative; Possible reasons: the display instrument with pt100 resistance connection is wrong or pt100 hot resistance short-circuit phenomenon; Processing method: correct wiring, or find out short circuit, reinforced insulation.

4, failure phenomenon: table indicating the pt100 resistance infinity;

may cause: pt100 heat resistance or lead wire short circuit or terminals to loosen, etc. ;

processing method: the change in resistance or welding and tighten the screw connection, etc.