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 language | English |
|---|---|
| Pages (from-to) | 491-494 |
| Number of pages | 4 |
| Journal | High Temperatures - High Pressures |
| Volume | 20 |
| Issue number | 5 |
| Publication status | Published - 1988 Dec 1 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Physical and Theoretical Chemistry
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Cite this
Hahn, J. W., & Rhee, C. (1988). Calculation of the temperature error caused by effective wavelengths in the two-colour pyrometer. High Temperatures - High Pressures, 20(5), 491-494.