IMPROVED UNCERTAINTY OF PALLADIUM WIRE BRIDGE METHOD

M.Gotoh, M.Ogawa, J.Ode

Abstract

Wire method of calibration for R type thermocouple has reevaluated. Four kinds of source material of Pd wire was distributed and R type thermocouples from the same spool of wire were used among 7 members of the study group to equalize the experimental condition. More than 140 runs of the palladium point were performed. To avoid ambiguity in assigning Emf to the palladium melting point a data analysis program was developed which can determine a unique Emf from the data and can reject low quality plateau. Reproducibility expressed in terms of standard deviation is 0.18 K which is better than the previous results.

Keywords

Palladium wire bridge method, uncertainty, unambiguous determination

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IMEKO-WC-2000-TC12-P307.pdf

DOI

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IMEKO TC

TC12 - Temperature and Thermal Measurements

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