The inter-comparison of air speed from 2 m/s to 40 m/s by Pitot static tubes

Y. M. Choi, N. D. Trang, W. Kang, Y. Terao, N. Kurihara, A. Iwai, T. Funaki, S. H. Bak, C. S. Yoo, Y. T. Kwon

Abstract

The Mutual Recognition Arrangement (MRA) is framed by the International Committee of Weights and Measures in order to establish the degree of equivalence of national measurement standards via the key comparisons as well as the inter-comparisons of measurements. Based on this objective, the current work was performed in order to determine the degrees of equivalence among three laboratories in Korea Research Institute of Standards and Science (KRISS), National Metrology Institute of Japan (NMIJ) and HCT company for air speed over the range from 2 m/s to 40 m/s. In this inter-comparison of air speed, two AMCA type Pitot static tubes were considered as artifacts. The reference value (RV) and its uncertainty was calculated from all measurement results reported by the participants. The normalized deviations, En-number, were mostly smaller than 1. Consequently, the results of participants were mutually consistent.

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IMEKO TC

TC9 - Flow Measurement

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