Thermocouple temperature sensor can not be ignored when using the details of the problem

The principle of thermocouple temperature sensor and installation for most of the industry people already very understanding, but in the process of thermocouple temperature sensor using details and two easy to ignore. One is its working temperature, and the other is its insertion depth. Then the next project to specific about temperature thermocouple sensor can not be ignored when using the two details.

the normal work of the thermocouple temperature sensor element is to meet its working conditions, one of which is its working current, owing to the thermocouple temperature sensor resistance, when current flows through the temperature thermocouple sensor element, there will be a power loss, fever, so in order to reduce the fever caused by temperature measurement error of thermocouple sensor itself, to meet the thermocouple sensor working conditions, try to reduce the fever itself.

this is why the thermocouple temperature sensor to under the condition of constant small current use. Such as the routine work of the platinic resistance current is 5 ma, ma, but we recommend working current is 1. The reason is to reduce the temperature of thermocouple sensor element self-heating cause measurement error. Current is constant, the output will has a linear relationship of temperature and electric potential.

insert depth of thermocouple temperature sensor is also easy to overlook a problem, some customers require insertion depth is short but the diameter is larger, it is not reasonable, especially in the case of high temperature it is not desirable, theoretically insertion depth general thermocouple temperature sensor can be decided according to the actual needs. But the minimum insertion depth should not be less than 8 - the diameter of the thermocouple temperature sensor to protect casing 10 times. In this way can guarantee the stability of thermocouple temperature sensor performance.

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