Calculation of the temperature error caused by effective wavelengths in the two-colour pyrometer

Jae Won Hahn, Chunghi Rhee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

When the surface temperature of a greybody is measured with a two-colour pyrometer, a temperature error is caused by the use of effective wavelengths for a blackbody source. This error has been calculated numerically in the temperature range 500-2000 K. For the calculation it has been assumed that the two channels of the two-colour pyrometer have triangular spectral responses with a full width at half-maximum of 0.1 μm, and peak wavelengths of 2.0 μm and 2.5 μm. When the emissivities of the greybodies are 0.3, 0.5, and 0.7, the maximum calculated temperature errors are 3.5%, 1.8%, and 0.85%, respectively.

Original languageEnglish
Pages (from-to)491-494
Number of pages4
JournalHigh Temperatures - High Pressures
Volume20
Issue number5
Publication statusPublished - 1988 Dec 1

Fingerprint

Pyrometers
pyrometers
Color
color
Wavelength
wavelengths
spectral sensitivity
emissivity
Temperature
surface temperature
temperature
Full width at half maximum

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Physical and Theoretical Chemistry

Cite this

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title = "Calculation of the temperature error caused by effective wavelengths in the two-colour pyrometer",
abstract = "When the surface temperature of a greybody is measured with a two-colour pyrometer, a temperature error is caused by the use of effective wavelengths for a blackbody source. This error has been calculated numerically in the temperature range 500-2000 K. For the calculation it has been assumed that the two channels of the two-colour pyrometer have triangular spectral responses with a full width at half-maximum of 0.1 μm, and peak wavelengths of 2.0 μm and 2.5 μm. When the emissivities of the greybodies are 0.3, 0.5, and 0.7, the maximum calculated temperature errors are 3.5{\%}, 1.8{\%}, and 0.85{\%}, respectively.",
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Calculation of the temperature error caused by effective wavelengths in the two-colour pyrometer. / Hahn, Jae Won; Rhee, Chunghi.

In: High Temperatures - High Pressures, Vol. 20, No. 5, 01.12.1988, p. 491-494.

Research output: Contribution to journalArticle

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N2 - When the surface temperature of a greybody is measured with a two-colour pyrometer, a temperature error is caused by the use of effective wavelengths for a blackbody source. This error has been calculated numerically in the temperature range 500-2000 K. For the calculation it has been assumed that the two channels of the two-colour pyrometer have triangular spectral responses with a full width at half-maximum of 0.1 μm, and peak wavelengths of 2.0 μm and 2.5 μm. When the emissivities of the greybodies are 0.3, 0.5, and 0.7, the maximum calculated temperature errors are 3.5%, 1.8%, and 0.85%, respectively.

AB - When the surface temperature of a greybody is measured with a two-colour pyrometer, a temperature error is caused by the use of effective wavelengths for a blackbody source. This error has been calculated numerically in the temperature range 500-2000 K. For the calculation it has been assumed that the two channels of the two-colour pyrometer have triangular spectral responses with a full width at half-maximum of 0.1 μm, and peak wavelengths of 2.0 μm and 2.5 μm. When the emissivities of the greybodies are 0.3, 0.5, and 0.7, the maximum calculated temperature errors are 3.5%, 1.8%, and 0.85%, respectively.

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