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Performance of Different Light Sources for the Absolute Calibration of Radiation Thermometers

AuthorsMartín, M. J.; Mantilla, J. M.; Campo, D. del; Hernanz, María Luisa CSIC ORCID CVN; Pons Aglio, Alicia CSIC ORCID; Campos Acosta, Joaquín CSIC ORCID
KeywordsStandard radiation thermometer
Thermodynamic temperature
Radiance method
Absolute radiometry
Issue Date25-Jul-2017
CitationInternational Journal of Thermophysics 38: 138 (2017)
AbstractThe evolving mise en pratique for the definition of the kelvin (MeP-K) [1, 2] will, in its forthcoming edition, encourage the realization and dissemination of the thermodynamic temperature either directly (primary thermometry) or indirectly (relative primary thermometry) via fixed points with assigned reference thermodynamic temperatures. In the last years, the Centro Español de Metrología (CEM), in collaboration with the Instituto de Óptica of Consejo Superior de Investigaciones Científicas (IO-CSIC), has developed several setups for absolute calibration of standard radiation thermometers using the radiance method to allow CEM the direct dissemination of the thermodynamic temperature and the assignment of the thermodynamic temperatures to several fixed points. Different calibration facilities based on a monochromator and/or a laser and an integrating sphere have been developed to calibrate CEM’s standard radiation thermometers (KE-LP2 and KE-LP4) and filter radiometer (FIRA2). This system is based on the one described in [3] placed in IO-CSIC. Different light sources have been tried and tested for measuring absolute spectral radiance responsivity: a Xe-Hg 500 W lamp, a supercontinuum laser NKT SuperK-EXR20 and a diode laser emitting at 6473 nm with a typical maximum power of 120 mW. Their advantages and disadvantages have been studied such as sensitivity to interferences generated by the laser inside the filter, flux stability generated by the radiant sources and so forth. This paper describes the setups used, the uncertainty budgets and the results obtained for the absolute temperatures of Cu, Co-C, Pt-C and Re-C fixed points, measured with the three thermometers with central wavelengths around 650 nm.
Description13 pags., 6 figs., 3 tabs. -- Part of the following topical collections: TEMPMEKO 2016: Selected Papers of the 12th International Symposium on Temperature, Humidity, Moisture and Thermal Measurements in Industry and Science
Publisher version (URL)https://doi.org/10.1007/s10765-017-2271-1
Identifiersdoi: 10.1007/s10765-017-2271-1
issn: 0195-928X
Appears in Collections:(CFMAC-IO) Artículos
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