一、绪言定义1968年国际实用温标中的13.81开至630.74℃的一段系用标准铂电阻温度计。由于上述温度范围要有高的精度,温度计量谘询委员会考虑将铂电阻温度计的工作范周延伸至金点(1064.43℃)。在修订国际实用温标630～1064℃段之前要解决的一个问题就是要建立用于此段温度范围的温 I. INTRODUCTION The definition of 1968 international practical temperature scale in 13.81 open to 630.74 ℃ section with a standard platinum resistance thermometer. Due to the high accuracy of the above temperature range, the Advisory Committee on Thermometry has considered extending the working range of the platinum resistance thermometer to the gold point (1064.43 ℃). One of the problems to be solved before revising the International Practical Temperature Scale 630 ~ 1064 ℃ is to set the temperature for this temperature range