Development and Long-Term Stability Assessment of Co–C Eutectic Fixed Point for Thermocouple Thermometry
| Autor: | Gaurav Gupta, Hansraj Meena, Umesh Pant, D. D. Shivagan |
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| Rok vydání: | 2019 |
| Předmět: |
Reproducibility
Materials science Transition temperature Thermodynamics 02 engineering and technology Repeatability Fixed point 021001 nanoscience & nanotechnology Condensed Matter Physics 020401 chemical engineering Thermocouple Measurement uncertainty Radiometry 0204 chemical engineering 0210 nano-technology Eutectic system |
| Zdroj: | International Journal of Thermophysics. 40 |
| ISSN: | 1572-9567 0195-928X |
| DOI: | 10.1007/s10765-019-2546-9 |
| Popis: | 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 270 h 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 3 years from 2015 to 2017, and overall drift for the cell was estimated to be 0.1 °C, after normalizing the drift of the thermocouple. |
| Databáze: | OpenAIRE |
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