Characterizing a linear pyrometer at the National Metrology Institute of South Africa

Q3 Engineering
E. Ejigu
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引用次数: 0

Abstract

A linear pyrometer is used to realize the International Temperature Scale of 1990 (ITS-90) for temperature ranges above 961.78 °C in most National Metrology Institute (NMI) radiation thermometry labs. The different components of the linear pyrometer system working together to measure temperature may exhibit some errors which should be accounted for. The errors can be characterized by several equipment parameters that should be measured before the radiation thermometer is used to realize ITS-90 temperatures. Relative spectral responsivity (s), size of source effect (SSE), gain ratio (GR), non-linearity (NL), distance effect (DE), temperature coefficient and zero drift are all major equipment parameters that characterize the efficiency of a linear pyrometer in realizing ITS-90. In this work, an attempt was made to describe and demonstrate these major parameters by using actual measured characterization results of a linear pyrometer. Uncertainty contributions from some of the parameters considered in scale realizations was also demonstrated using the measurement results.
在南非国家计量研究所对线性高温计进行表征
在大多数美国国家计量研究所(NMI)的辐射测温实验室中,对961.78°C以上的温度范围,采用线性高温计来实现1990年国际温标(ITS-90)。线性高温计系统的不同组成部分一起工作来测量温度可能会出现一些应该考虑的误差。在使用辐射温度计实现ITS-90温度之前,应该测量几个设备参数,这些参数可以表征误差。相对光谱响应率(s)、源效应大小(SSE)、增益比(GR)、非线性(NL)、距离效应(DE)、温度系数和零漂移都是表征线性高温计实现ITS-90效率的主要设备参数。在这项工作中,我们尝试用线性高温计的实际测量结果来描述和演示这些主要参数。使用测量结果也证明了在尺度实现中考虑的一些参数的不确定性贡献。
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来源期刊
International Journal of Metrology and Quality Engineering
International Journal of Metrology and Quality Engineering Engineering-Safety, Risk, Reliability and Quality
CiteScore
1.70
自引率
0.00%
发文量
8
审稿时长
8 weeks
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