随着工业控制自动化发展,温度二次仪表应用越来越广泛,种类也越来越多.文章列举了常见温度二次仪表的种类及使用方法、使用中注意事项,同时结合现行有效的国家检定规程、校准规范针对性的对各类温度二次仪表示值误差的溯源及溯源过程中注意事项进行了阐述和对比,对温度二次仪表的检定、校准和应用具有指导意义.

In order to address the issue of measurement accuracy in the calibration of temperature itinerant detecting instruments, a new mathematical model has been established for measuring the low-temperature Pt100 sensors and hightemperature thermocouple sensors based on existing technical specifications. The GUM method has been employed to assess the measurement uncertainty of the temperature itinerant detecting instruments, which provides technical support for improving the traceability and transfer system of these instruments and revising the calibration specification. The results show that the GUM method identifies the primary sources of uncertainty as the temperature itinerant detecting instruments’ indications and the performance of the constant temperature sources. The uncertainty of the low-temperature Pt100 sensors is 0.03℃ to 0.07℃（k=2） in the range of-80℃ to 600℃, while the uncertainty of the high-temperature thermocouple sensors is 0.8℃（k=2） in the range of 600℃ to 1000℃. Furthermore, the use of a salt bath tank can significantly improve the calibration accuracy of temperature sensors in the temperature range of 300℃ to 600℃.

为了提高红外遥感高精度测量水平,研发适用于红外遥感测温范围的次级固定点已成为提高在轨温度标定精度的重要手段.针对红外遥感领域涉及的温度范围(190～350 K),研制了Bi-In-Sn三元合金固定点.为提高三元合金温坪复现水平,采用预熔方法对三元合金固定点进行预处理,分析不同热工况对三元合金温坪的影响,获得适用于该三元合金固定点复现方法.结果 表明,适当地预热与预熔能够优化固定点温坪复现水平,优化后的Bi-In-Sn合金熔化温坪持续7h以上,复现性优于1.3mK;通过对Bi-In-Sn共晶点赋值获得其温度为333.7318 K,扩展不确定度为3.0 mK(k =2).

研制温湿度计自动拍照检定系统,实现温湿度计的自动检定.利用计算机控制技术、嵌入式技术和图像识别技术,通过计算机软件控制温湿度检定箱、精密露点仪、拍照机器人、数字相机等装置,对温湿度计进行自动拍照、识别、数据处理等,自动完成检定过程.该系统各功能模块运行正常,系统运行稳定,可按照JJG 205—2005《机械式温湿度计检定规程》检定流程对温湿度计进行检定,满足使用要求.该系统降低了人工读数误差,提高了检定精度和检定效率.

文章主要介绍利用Excel内嵌的VBA编程语言和Excel的宏功能相结合,实现0℃～1300℃温区标准铂铑10-铂热电偶温度与热电势值的相互计算,并对计算结果进行了验证。

Glass liquid thermometer computer aided test system,can guide the verification member of the science,to complete standard number,temperature control,arrange and put the thermometer,data acquisition and processing of a series of work,to prevent the problem of omission,fault detection,,repetitive inspection occurred.

水三相点是定义热力学温度单位的唯一参考点,也是ITS-90国际温标最重要的定义固定点。水三相点的复现是通过水三相点瓶内冻制冰套来实现。文章首先介绍了几种传统的冰套冻制方法,其次讨论了其优缺点;最后着重介绍了一种快速简单可行的冻制冰套的新方法,并阐述了此种方法的优点。