Thermocouple anti-interference methods1

Thermocouple, are generally not directly measure temperature, were widely used in our daily life. But in use process, due to the interference by many factors, we in the use of thermocouple, should be ready to prevent interference, so as to make our thermocouple measurement more accurate, so as to make our work more convenient and effective.

1, isolation method: isolation method is impending, when you install the thermocouple made thermocouple is not contact with the furnace wall brick, also USES insulation between thermocouple and stents in isolation. This method is a good way to prevent heat leakage interference.

2, shielding method: shielding method is the compensation of the thermocouple wire, wear in iron pipe or other metal shield to shield. This will prevent electromagnetic interference and the interference of high voltage electric field. When using this method should be iron pipe, conduct a good grounding and shielding, and the compensating conductor ground up.

3, grounding method: this method is to measure ground loop, and the interference is introduced into the earth so as to ensure the measurement accuracy of instrument. This approach has two forms of farming first is thermocouple reference end grounding, the second is thermocouple measuring the grounding.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor