Pant, Umesh and Meena, Hansraj and Gupta, Gaurav and Shivagan, D. D. (2019) Development and Long-Term Stability Assessment of Co-C Eutectic Fixed Point for Thermocouple Thermometry. International Journal of Thermophysics, 40 (8). pp. 80-93. ISSN 0195-928X

PDF - Published Version Restricted to Registered users only Download (1167Kb) | Request a copy

Abstract

The long-term stability assessment on the Co-C eutectic fixed point cell indigenously developed at CSIR-National Physical Laboratory, India is presented. Metal-carbon eutectic fixed points are promising candidates for the direct traceability to high-temperature thermometry and radiometry. The acceptance of any fixed point as a temperature reference cell depends on its repeatability, reproducibility, and long-term stability. In this paper, we report the detailed investigations on development and realization of Co-C cell and comparison of successive 3-year data to evaluate the long-term stability and robustness of cell. We assigned melting transition temperature to Co-C cell by using Type-S thermocouple, calibrated on ITS-90 fixed points. The cell has been subjected for 270h of melt-freeze cycle since its construction in 2014 and exhibits excellent thermo-mechanical stability. The Co-C melting transition temperature and measurement uncertainty were estimated by using the same Type-S thermocouple, for 3years from 2015 to 2017, and overall drift for the cell was estimated to be 0.1 degrees C, after normalizing the drift of the thermocouple.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Mechanics Applied Physics/Condensed Matter Physical Chemistry/Chemical Physics Thermodynamics
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	06 Feb 2020 07:28
Last Modified:	06 Feb 2020 07:28
URI:	http://npl.csircentral.net/id/eprint/4144

Actions (login required)

View Item