Jiutian Instrument Co., Ltd. is a professional manufacturer of thermocouples and thermal resistances. We provide various quotations and consulting services for products. With the rapid development of the industry, thermocouple products such as platinum-rhodium thermocouples and armored thermocouples are more and more widely used in production. Thermocouples have become one of the most commonly used temperature inspection components in the industry. Its main features are: accuracy It has the characteristics of high height, wide use scale, simple structure and convenient use. Jiutian Instrument Co., Ltd. understands and analyzes thermocouple products through various ways, and interprets various common sense knowledge for the majority of netizens. Then let's learn how to judge the quality of thermocouples? The method of thermocouple temperature measurement is that two different raw material conductors form a closed loop. When there are different temperatures at the two ends, a current will flow through the loop. At this moment, there is an electromotive force between the two ends, which is the so-called Seebeck effect. . The two homogeneous conductors with different compositions are the hot electrode, the end with the higher temperature is the working end, and the end with the lower temperature is the free end, and the free end is usually at a constant temperature. After a thermocouple has been used for a period of time, it will definitely wear out and even cause damage. Usually, the quality of the thermocouple is inseparable from the thermocouple wire inside it. How to judge the quality of the thermocouple requires some procedures to check. : First observe that there is no major wear on the surface of the thermocouple, and check the quality of the internal structure to determine whether it is good or bad. . Put the thermocouple to be checked on a special porcelain sleeve, put it into the electric tube furnace together with the qualified platinum-rhodium thermocouple, and insert the hot end into a porous metal nickel for soaking in the electric tube furnace. in the cylinder. Place the tube furnace at the highest temperature of the thermocouple, and stabilize this position, and then use the qualified potentiometer to measure the thermoelectric potential difference between the qualified platinum-rhodium thermocouple and the inspected thermocouple and record it. According to the recorded thermoelectric potential difference, check the corresponding temperature, so that you can judge whether the thermocouple is qualified.
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