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Analysis on the Automatic Method of Calibrating Indium Freezing Point
Author(s): 
Pages: 108-111
Year: Issue:  6
Journal: Ocean Technology

Keyword:  ITS-90国际温标铟凝固点温度校准复现;
Abstract: 铟凝固点(156.598 5℃)是ITS-90国际温标重要的定义固定点,可用于海洋温度校准实验室标准铂电阻温度计的期间核查工作.提高铟凝固点复现水平,可以保证海洋温度传感器计量校准(0.01℃~156.598 5℃)准确度,对海洋学界获取高质量的海水温度数据具有重要意义.文中介绍了使用铟凝固点容器及自动复现装置复现铟凝固点的过程;通过分析铟凝固点复现数据发现其凝固温坪大于18h,期间温度变化小于0.8 mK,能达到实验室日常使用及标准铂电阻温度计期间核查的要求.通过铟凝固点装置,可对使用范围0.01℃~156.598 5℃的温度计进行分度,提高海水温度检测的实验精度.
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