众所周知,用热电偶测温时,须用补偿导线将热电偶的冷端引伸到远离工作端的控制室操作台或温度波动较小的地方。这对于单针指示或虽是多点记录仪表,但与它相联接的各支热电偶分散在不同的工作点上,这是可以的。然而,对于多点式热电偶就比较复杂,可用以下办法进行冷端补偿。 As we all know, when measuring temperature with thermocouple, use compensating wire to extend the cold end of the thermocouple to the control room console away from the working end or the place where temperature fluctuation is small. This is a single-pin instructions or although it is a multi-point recording instrument, but it is connected with each thermocouple dispersed at different operating points, this is possible. However, for multi-point thermocouples is more complex, you can use the following methods for cold junction compensation.