上海计量测试2024，Vol.51Issue(1) ：37-40,44.

标准铂电阻温度计在温度范围0～419.527 ℃内的长期稳定性

Long-term stability of standard platinum resistance thermometers in the temperature range 0-419.527 ℃

姜盈盈 邹冰妍 乔家广 朱毅晨 姚丽芳
上海计量测试2024，Vol.51Issue(1) ：37-40,44.
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标准铂电阻温度计在温度范围0～419.527 ℃内的长期稳定性

Long-term stability of standard platinum resistance thermometers in the temperature range 0-419.527 ℃

姜盈盈 1邹冰妍 1乔家广 1朱毅晨 1姚丽芳1
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作者信息

  • 1. 上海市计量测试技术研究院
  • 折叠

摘要

在温度范围0.01～419.527 ℃内,对标准铂电阻温度计进行长期稳定性调查,选取的样本为2017年至2020年送至上海市计量测试技术研究院进行检定的铂电阻温度计,一共319支.对样本的水三相点电阻值、锡凝固点电阻比和锌凝固点电阻比变化率进行分析,75％样本的水三相点变化幅度在2.66 mK/a以内,相同样本比例的锡凝固点和锌凝固点变化幅度分别在1.19 mK/a和1.69 mK/a以内.统计研究表明,仅在水三相点测量变化不足以确定锡凝固点电阻比WSn和锌凝固点电阻比WZn的变化,而由于WSn和WZn的变化之间具有强相关性,测量使用范围内的任意固定点的电阻比足以识别整个范围内温度计可能发生的变化.

Abstract

In the temperature range between 0.01 ℃ and 419.527 ℃,the long-term stability of standard platinum resistance thermometers(SPRTs)was investigated.There were 319 samples that were sent to Shanghai Institute of Metrology and Testing Technology for verification from 2017 to 2020.The rates of change of resistance Rtp and the resistance ratio of Sn and Zn were analyzed.The rate of change of resistance Rtp was within 2.66 mK/a,for the 75％of the samples investigated.And,the rates of change of WSn and WZn were within 1.19 mK/a and 1.69 mK/a,for the same portion of SPRTs.Statistical study showed that measurement change of Rtp was not sufficient to determine the change in WSn or WZn.Because of the strong correlation between the changes of WSn and WZn,the resistance ratio of any fixed point in the measurement range is sufficient to identify the possible changes of the thermometer in the whole range.

关键词

标准铂电阻温度计/长期稳定性

Key words

standard platinum resistance thermometers/long-term stability

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出版年

2024
上海计量测试
上海市计量测试技术研究院,上海市计量测试学会,上海市计量协会

上海计量测试

影响因子：0.171
ISSN：1673-2235
参考文献量9
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