INTER-LABORATORY COMPARISONS BETWEEN NMIJ AND ACCREDITED LABORATORIES FOR WATER FLOW IN JAPAN

N Furuichi, Kar-Hooi Cheong, Y Terao

Abstract

Inter-laboratory comparisons between NIMJ and four JCSS accredited laboratories in Japan for water flow are carried out for wide flowrate range from 0.005 m³/h to 5000 m³/h using five type transfer flowmeters. The deviations of test results between NMIJ and the accredited labs are within approximately 0.1% and the averages of these deviations for each accredited labs are within 0.025%. These result indicate a high capability of the calibration facilities in the accredited labs. To investgate the reason of the deviations in the comparisons, influences of temperature, density and measurement time are observed.

Keywords

intercomparisons, water flow, tempertature, density, measurement time

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IMEKO-TC9-2013-057.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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