A methodology is examined for the construction of a temperature scale over the range 692.67–1234.93 K by reproducing the unit of temperature by emitters based on reference points of pure metals zinc, aluminum, and silver, and the transmission of the unit of temperature to an emitter of variable temperatures by a pyrometer-comparator. The emitters are absolute black bodies. Interpolation of the readings of a pyrometer-comparator being used is done based on Planck’s Law. The sources of uncertainty are analyzed, and the uncertainty budget of the reproduction and transfer of the unit of temperature – the kelvin – by the radiation method is presented. The uncertainty of measurement of the temperature of an emitter as an absolute black body, associated using a pyrometer-comparator, was (1.99–2.94)·10–1°C, which makes it possible to use this pyrometer to construct a thermodynamic temperature scale.
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Translated from Izmeritel’naya Tekhnika, No. 2, pp. 61–65, February, 2022.
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Nazarenko, L.A., Neyezhmakov, P.I., Pushchin, R.V. et al. Temperature Scale in the Range from 692.67 K TO 1234.93 K: Construction by Infrared Radiation. Meas Tech 65, 137–141 (2022). https://doi.org/10.1007/s11018-022-02059-8
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DOI: https://doi.org/10.1007/s11018-022-02059-8