热电偶温度与电势互换公式

Exchangeable formulas of temperature to electric potential for thermocouple

本文对铜—铜镍(康铜)(T)、镍铬—铜镍(康铜)(E)、铁—铜镍(康铜)(T)和铂铑13—铂(R)四种热电偶,根据温度 T→电势 E 的分度公式,采用多项式回归的方法,得出了电势 E→温度 T 的拟合公式,与分度公式比较,最大偏差在0.04℃以下,0℃以上的回归公式最大偏差小于0.02℃。

According to thermocouple T→E(temperature→electric poten- tial)graduation formulas of Cu/Cu-Nr(T),Nr-Cr/Cu-Nr(E),Fe/Cu-Nr(J) and Pt-Rh13/Pt(R),this paper presents their E→T(electric potential→ temperature)regression formulas by polynomial regression.In comparison with their graduation formulas,the most deviation of theseregression formulas is under 0.04℃.As the temperature is more than 0℃,the most deviation is less than 0.02℃.