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本文提出了一种新的偏差函数,可用来代替现行的1968年国际实用温标[IPTS-68(1975年修订版)]中的13.81—273.15K温区的四个偏差函数。此偏差函数为: △W=W-W_s=(W-1)(a_4+a_5W+a_6W~2+a_7W~3)/(1+a_1W+a_2W~2+a_3W~2) 对国际比对的35支标准铂电阻温度计的实验数据用上式进行计算,结果表明:我们所建议的新温标不仅免除了IPTS-68在13.81—273.15K中划分四个温区的必要性和复杂性,同时,在17—273.15K温区内,温标的内部一致性比IPTS-68提高一倍。
This paper presents a new deviation function that can be used to replace the four deviation functions in the 13.81-273.15K temperature range in the current 1968 International Practical Temperature Scale [IPTS-68 (Rev. 1975)]. The deviation function is: ΔW = W-W_s = (W-1) (a_4 + a_5W + a_6W ~ 2 + a_7W ~ 3) / (1 + a_1W + a_2W ~ 2 + a_3W ~ 2) The experimental data of the standard platinum resistance thermometer is calculated by the above formula. The results show that the new temperature scale we proposed not only eliminates the necessity and complexity of IPTS-68 dividing the four temperature zones in 13.81-273.15K, 17-273.15K temperature range, temperature scale internal consistency than IPTS-68 doubled.