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Tungsten–Rhenium Thermocouples Calibration in Ultra-High Temperature Range

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Abstract

There are presented results of experimental research on calibration of tungsten–rhenium thermocouples at the temperatures exceeding the upper limit of measurements (1700 °C) of standard type B thermocouple. The research was carried out using the high-temperature installation UKT-2500 designed for practical use in production of temperature sensors based on refractory thermocouples. Available types of insulating ceramics for thermocouples have been tested in the temperature range of (1500–2500) °C. The effects of signal shunting and thermocouples stability in inert atmosphere have been investigated at upper limit of the operating temperature range. There was proved practical feasibility of the method for calibration of several contact temperature sensors (up to 10) in one run relative to radiation pyrometer readings. Its suitability for thermocouple calibration and certifying of thermocouple wires in the temperature range (1200–2200) °C was shown. Installation enables to use reference fixed-points of Me-C type to get the highest accuracy calibration of a single tungsten–rhenium thermocouple. Type A bare-wire thermocouple was calibrated in the whole measuring range from 1200 °C to 2500 °C against an accurate radiation pyrometer.

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Data Availability

Any datasets used can be accessed on inquiry to the corresponding author, and some data can be got from the published papers indicated in the References.

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Acknowledgements

This project was supported and being consulted by specialists of All-Russian Institute of Optical and Physical Measurements, Moscow (B. B. Khlevnoy, D. A. Otryaskin), Mendeleev’s All-Russian Institute for Metrology, St-Petersburg (V. M. Fuksov), All-Russian Research Institute of Metrological Service, Moscow (A. A. Ignatov).

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Authors and Affiliations

  1. “Obninsk Thermoelectric Company”, Ltd., 30 Krasnykh Zor street, Obninsk, Kaluga Region, Russian Federation, 249031

    A. A. Ulanovskiy & S. S. Ankudinov

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  1. A. A. Ulanovskiy
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  2. S. S. Ankudinov
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Contributions

AAU wrote the basic manuscript text and Figs. 4, 5 and 10. SSA prepared all other Figs and experimental datasets. Both authors reviewed the manuscript.

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Correspondence to A. A. Ulanovskiy.

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Ulanovskiy, A.A., Ankudinov, S.S. Tungsten–Rhenium Thermocouples Calibration in Ultra-High Temperature Range. Int J Thermophys 44, 66 (2023). https://doi.org/10.1007/s10765-023-03168-4

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