Self-calibration of a W/Re thermocouple using a miniature Ru-C (1954 °C) eutectic cell

Journal Article · Wed Sep 11 04:00:00 EDT 2013 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4821392· OSTI ID:22218027

Ongrai, O. ^[1]; Pearce, J. V.; Machin, G. ^[1]; Sweeney, S. J. ^[2]

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1. National Physical Laboratory (NPL), Hampton Road, Teddington, Middlesex (United Kingdom)
2. University of Surrey, Guildford, Surrey (United Kingdom)

Previous successful investigations of miniature cobalt-carbon (Co-C, 1324 °C) and palladium-carbon (Pd-C, 1492 °C) high temperature fixed-point cells for thermocouple self-calibration have been reported [1-2]. In the present work, we describe a series of measurements of a miniature ruthenium-carbon (Ru-C) eutectic cell (melting point 1954 °C) to evaluate the repeatability and stability of a W/Re thermocouple (type C) by means of in-situ calibration. A miniature Ru-C eutectic fixed-point cell with outside diameter 14 mm and length 30 mm was fabricated to be used as a self-calibrating device. The performance of the miniature Ru-C cell and the type C thermocouple is presented, including characterization of the stability, repeatability, thermal environment influence, ITS-90 temperature realization and measurement uncertainty.

• OSTI ID: 22218027
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1552; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALIBRATION
CARBON
COBALT
EUTECTICS
INTERMETALLIC COMPOUNDS
MELTING POINTS
PALLADIUM
PERFORMANCE
RUTHENIUM
STABILITY
TEMPERATURE MEASUREMENT
THERMOCOUPLES