Thermocouple wiring is distinguished by two poles, namely positive and negative, if we observe, we can see the calibration on the wiring board. The above calibrations are: +, -, but some manufacturers do not have positive and negative points. If we encounter such a situation, we need to judge through experience: it is the color of the wiring to distinguish, the green is positive, and the gray is negative. . Measure it with a thermometer. Check the temperature after wiring. If it is suction, you can also use a magnet to determine. Compensation wires also need correct wiring, as well as positive and negative. When connecting the meter, we should also pay attention to the positive and negative poles. Generally, the terminals are marked on them. If not, please refer to the manual. When wiring the thermocouple, we also need to pay attention that the general-purpose terminal cannot be used for the wiring of the thermocouple, because the guide bar in the terminal is usually made of special copper material such as electrolytic copper, which is different from the copper composing the thermocouple. Depending on the material, thermocouple terminals are supplied in pairs, unlike general-purpose combination terminals, which are supplied in pieces. The guide bars of each pair of thermocouple terminals are made of different metal materials. For different types of thermocouples, there are correspondingly different terminals. The conductive material used in the thermocouple terminal should be exactly the same as the conductive material that composes the thermocouple, so as to ensure the accuracy of the thermocouple signal during the transmission process. As a transmitter for measuring temperature, industrial fabricated thermocouples are usually used in conjunction with display instruments, recording instruments and electronic regulators.
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