(一)前言化工过程和科研中关于温度的测量,都广泛的采用铂电阻和热电偶作为测温元件,如日子横河公司的EBS系列和Ⅰ系列仪表及国产的DDZ—Ⅱ,Ⅲ型仪表中的温度变送器,就都是采用铂电阻和热电偶做为测温元件的。对于铂电阻,如BA_2,它在0～500℃的温度范围内有将近2％的非线性,这个误差是比较大的。怎样用最简单的线路,最易于调校的方法,把温度变送 (A) Foreword Chemical process and scientific research on the temperature measurement, are widely used platinum resistance and thermocouple temperature measurement devices, such as the days of Yokogawa EBS Series and Series I instruments and domestic DDZ-Ⅱ, Ⅲ instrument In the temperature transmitter, are used platinum resistance and thermocouple temperature measurement device. For platinum resistance, such as BA_2, it has a nonlinearity of nearly 2% over the temperature range of 0 to 500 ° C. This error is relatively large. How to use the most simple line, the easiest way to adjust, the temperature change