“二等标准铜-康铜热电偶检定规程”规(T)热-3-63,自一九六三年颁布实行后已有十余年的时间了,原规程对于0～-100℃范围内的低温测量起到了应有的作用。原规程规定热电偶的测量范围为0～-100℃,检定时测量三个检定点即-40℃、-80℃、-100℃。通过最小二乘法及误差理论计算热电偶的温度、热电势关系式中的a、b系数值〔1〕,温度,热电势关系式采用下式: e_t=at+bt~2(1) 当检定时三个检定点的准确度能够保证在±0.03～±0.05℃的范围之内,则在最后检定 “Second-class standard copper - Constantine copper thermocouple test procedures,” Regulation (T) heat -63, since its promulgation in 1963 has been implemented for more than ten years, the original procedures for the 0 ~ -100 ℃ range Within the low temperature measurement has played its due role. The original code stipulates that the measuring range of the thermocouple is 0 ~ -100 ° C, and the three test points of the test are -40 ° C, -80 ° C and -100 ° C. Through the least squares method and the error theory to calculate the temperature of the thermocouple, the relationship between the thermoelectric power in the coefficient of a, b 〔1〕, temperature, thermoelectric power relationship using the following formula: e_t = at + bt ~ 2 (1) When the accuracy of the three test points can be guaranteed within ± 0.03 ~ ± 0.05 ℃ within the final test