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

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Title: Characterizing a linear pyrometer at the National Metrology Institute of South Africa.
Authors: Ejigu, Efrem K.1 (AUTHOR) eejigu@nmisa.org
Source: International Journal of Metrology & Quality Engineering. 2023, Vol. 14, p1-10. 10p.
Subjects: Pyrometers, Metrology, Action spectrum, Linear systems, Thermometry
Geographic Terms: South Africa
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. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Metrology & Quality Engineering is the property of EDP Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Characterizing a linear pyrometer at the National Metrology Institute of South Africa.
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Metrology+%26+Quality+Engineering%22">International Journal of Metrology & Quality Engineering</searchLink>. 2023, Vol. 14, p1-10. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Pyrometers%22">Pyrometers</searchLink><br /><searchLink fieldCode="DE" term="%22Metrology%22">Metrology</searchLink><br /><searchLink fieldCode="DE" term="%22Action+spectrum%22">Action spectrum</searchLink><br /><searchLink fieldCode="DE" term="%22Linear+systems%22">Linear systems</searchLink><br /><searchLink fieldCode="DE" term="%22Thermometry%22">Thermometry</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22South+Africa%22">South Africa</searchLink>
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  Data: 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. [ABSTRACT FROM AUTHOR]
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  Group: Ab
  Data: <i>Copyright of International Journal of Metrology & Quality Engineering is the property of EDP Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1051/ijmqe/2023002
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 1
    Subjects:
      – SubjectFull: Pyrometers
        Type: general
      – SubjectFull: Metrology
        Type: general
      – SubjectFull: Action spectrum
        Type: general
      – SubjectFull: Linear systems
        Type: general
      – SubjectFull: Thermometry
        Type: general
      – SubjectFull: South Africa
        Type: general
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      – TitleFull: Characterizing a linear pyrometer at the National Metrology Institute of South Africa.
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              Text: 2023
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              Y: 2023
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              Value: 14
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            – TitleFull: International Journal of Metrology & Quality Engineering
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