B-type compensating wire

The type B compensation wire must be selected correctly according to the type of thermocouple used and the occasion in which it is used. For example, the compensation wire of the K-type thermocouple should be selected, and the operating temperature range should be chosen according to the usage scenario. The typical working temperature for kx is -20 to 100 ℃, with a wide range of -25 to 200 ℃. The ordinary level error is ± 2.5 ℃, and the precision level is ± 1.5 ℃.

Try to keep the temperature of the two contact points as close as possible to the thermocouple terminal. The temperature at the connection point with the instrument terminal should be as high as possible. In areas where there is a fan in the instrument cabinet, the contact points should be protected to prevent the fan from blowing directly to the contact points. To improve the anti-interference performance of thermocouple connection wires, shielded compensation wires can be used. For situations where there are many sources of interference on site, the effect is better. But it is necessary to strictly ground the shielding layer, otherwise the shielding layer will not only fail to provide shielding, but also enhance interference.