What are the precautions for the use of KX compensation wire?

A. KX compensation wire use precautions in which aspects?1. KX compensation wire selection compensation wire must be based on the type of thermocouple used and the use of the occasion for the correct choice. For example, K-type coupling should choose K-type coupling compensation wire, according to the use of occasions, select the operating temperature range. Usually the KX working temperature is -20～100℃, and the wide range is -25～200℃. Ordinary grade error is ± 2.5 ℃, precision grade is ± 1.5 ℃. 2. KX compensation wire junction connection and thermocouple terminals 2 junctions as close as possible, try to keep the 2 junctions temperature consistent. And instrumentation terminals connected to the same temperature as possible, instrumentation cabinet with a fan in place, the point of contact should be protected not to make the fan blowing directly to the point of contact. 3. KX compensation wire length because the signal of the thermocouple is very low, for the micro-volt level, if you use the distance is too long, the signal attenuation and the environment in the interference of the strong electricity coupled together, enough to make the signal of the thermocouple distortion, resulting in inaccuracy of measurement and control of the temperature in control. Serious temperature fluctuations will occur. Usually use thermocouple compensation wire length control within 15 meters is better, if more than 15 meters, it is recommended to use the temperature transmitter for signal transmission. Temperature transmitter is the temperature corresponding to the value of the potential converted into DC current transmission, anti-interference strong. 4. KX compensation wire wiring compensation wire wiring must be away from the power line and interference sources. Where crossing is unavoidable, it is also possible to use crossing methods, not parallel. 5. Shielded KX Compensating Wire In order to improve the immunity of thermocouple connecting wires to interference, shielded compensating wires can be used. For the site interference source more occasions, the effect is better. But be sure to ground the shielding layer strictly, otherwise the shielding layer not only does not play the role of shielding, but enhance the interference.

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