金-铂热电偶校准装置的研制

doi:10.3969/j.issn.1000-1158.2023.11.08

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Abstract The gold-platinum thermocouple is one of the most accurate thermocouples available. The development of calibration installation for the high-precision gold versus platinum (Au/Pt) thermocouple and process and method of calibrating thermocouple are described. The calibration installation constructed with the temperature fixed point facilities, a specified annealing furnace and a low electric motive force (EMF) measurement is fully capable to calibrate thermocouple and a new method is proposed for evaluating the uncertainty components caused by thermoelectric inhomogeneity. The measurement reproducibility of calibration installation is up to 7mK and the calibration uncertainty is 0.03℃(k=2), which is sufficient for calibrating Au/Pt thermocouples.

Key words： metrology Au/Pt thermocouple calibration EMF thermoelectric inhomogeneity

Received: 20 September 2022 Published: 17 November 2023

PACS:

TB942

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	Articles by authors
	ZHENG Wei
	TANG Lei
	XIANG Ming-dong

Cite this article:

ZHENG Wei,TANG Lei,XIANG Ming-dong. Development of the Gold-Platinum Thermocouple Calibration Installation[J]. Acta Metrologica Sinica, 2023, 44(11): 1687-1691.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2023.11.08 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2023/V44/I11/1687

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