银、铝、锌和锡凝固点的高精度复现  

Research of High Precision System for Realizing The International Temperature Scale of 1990

作　　者：姚丽芳[1] 宋年兰[1] 

机构地区：[1]上海市计量测试技术研究院,200040

出　　处：《上海计量测试》2002年第2期21-25,共5页Shanghai Measurement and Testing

摘　　要：我们成功复现了 90国际温标定义的固定点 :银、铝、锌和锡凝固点。本文介绍了这些凝固点的复现方法和实验结果 ,表明能满足建立 0 - 96 1.78范围内 90国际温标的高精度复现系统的要求。We developed a system in which four freezing point furnaces were automatically controlled by a microcomputer controller under the command of a computer and succeed in realized the silver, aluminum, zinc and tin freezing points. A new high precision system for realizing the international temperature scale of 1990 in range of 0 to 961.78℃ was established with the total uncertainty of 1 to 5mK(for temperature 0℃ to 419.527℃) and 8.8 to 20mK(for temperature 419.527℃ to 961.78℃) with reliability of 0.99. A group of middle temperature working standard platinum resistance thermometers and a group of high temperature working standard platinum resistance thermometers were used as interpolation instrument.

关 键 词：国际温标 银凝固点 铝凝固点 锌凝固点 锡凝固点 铂电阻 温度计 复现方法 温度计量 

分 类 号：TB94[一般工业技术—计量学]