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用热电偶测量温度时,其参考端必须保持恒定温度,或对参考端的温度进行自动补偿,才能使二次仪表指示出被测点的实际温度值。在热电偶测温线路中,其参考端的温度补偿电路通常采用热电阻桥路。补偿桥路的输出电压应与热电偶参考端的电压一致,才能获得最佳的补偿效果。这就要求补偿桥路电阻和电桥的工作电压具有较高的精度,而且桥路各元件的制作与调整也比较麻烦。本文介绍用集成温度
Thermocouple temperature measurement, the reference must be maintained at a constant temperature, or the reference end of the temperature automatically compensated in order to make the secondary meter indicates the measured point of the actual temperature value. In the thermocouple temperature measurement circuit, the temperature compensation circuit of the reference end usually adopts a thermal resistance bridge. The compensation bridge output voltage should be consistent with the thermocouple reference voltage, in order to obtain the best compensation. This requires compensating bridge resistance and bridge operating voltage with high accuracy, and the bridge components of the production and adjustment is too much trouble. This article describes the use of integrated temperature