作者：黄元津，杜文岚
单位：台州市计量技术研究院,浙江台州 318000
中图分类号：TH811        
文献标识码：A         
文章编号：1006-883X(2017)11-0034-05
收稿日期：2017-08-29

摘要：针对传统工业铂热电阻任意温度点检定过程中计算繁琐的问题，提出一种新型的恒温槽温度偏离值计算方法。首先研究了标准铂电阻温度计的温标内插公式与其反函数之间的误差值。再从标准铂电阻温度计的不同温度范围的温标内插公式以及差值函数出发，推导出标准铂电阻不同电阻所对应温度的函数表达式。最后使用FLUKE 1529四通道便携测温仪的温度显示值作为标准值，通过实验值与理论值的对比验证了内嵌算法误差，并结合具体实际应用对改进方法的不确定度进行了评定，满足检定要求。
关键词：铂热电阻；参考函数；内插公式；温度；标准铂电阻温度计

An error calculation method for industrial platinum  resistances measuring thermostatic baths at full temperature range and uncertainty evaluation of the measuring results
HUANG Yuan-jin, DU Wen-lan
Taizhou Institute of Metrology and Technology, Taizhou 318000, China
Abstract: Aiming at the complex calculation problem  in  temperature verification process of platinum  resistances  at arbitrary temperature point in traditional industries, a new method for calculating the temperature deviation values of  thermostatic baths is put forward. Firstly, the error between the thermometric scale interpolation formula and its inverse function of standard Pt RTDs is studied. And then , the function expression of the resistances  corresponding to the temperatures is derived from the temperature scale interpolation formula and difference function of standard Pt RTDs at different temperature ranges. Finally， the error of the embedded algorithm is verified by the comparison between the experimental values and theoretical values with the temperature display values of a four channel portable thermometer FLUKE 1529 as the standard. Combined with the actual conditions, the uncertainty of the improved method is evaluated and meets the requirements of the calibration.
Keywords: platinum resistance; reference function; interpolation formula; temperature; standard Pt RTD

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备注：2017年 第23卷 第11期