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http://dx.doi.org/10.5293/KFMA.2004.7.1.024

Inter-comparison of Bell Prover using Sonic Nozzles  

Choi, Hae Man (한국표준과학연구원 유체유동그룹)
Park, Kyung-Am (한국표준과학연구원 유체유동그룹)
Publication Information
The KSFM Journal of Fluid Machinery / v.7, no.1, 2004 , pp. 24-29 More about this Journal
Abstract
The inter-comparison of standards is required to be recognized the calibration results. The sonic nozzle package is developed to do inter-comparison of the bell preyer used to calibrate many gas flow meters for industries. Four national metrology institutes (KRISS, CMS, CENAM, NEL) were participated in this inter-comparison. The deviation of calibration data from the average value was small at the low flow rate and large at the high flow rate, respectively At the high flow rate, the deviation was larger than the expected value from uncertainties asserted by NMIs. This means there are some problems in the uncertainty evaluation and experiment procedures in some of the participated NMIs.
Keywords
Sonic nozzle; Bell Prover; Inter-comparison; Uncertainty;
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  • Reference
1 ISO Guide 25, 1993, 'Guide to the Expression of Uncertainty in Measurement', ISO
2 측정 불확도 표현지침, 1998, KRISS-98-096-SP, KRISS
3 ISO 9300, 1993, 'Measurement of gas flow by means of critical flow venturi nozzles', ISO
4 ISO 5168, 2003/DIS, 'Measurement of Fluid Flow-Estimation of Uncertainty of a Flow rate Measurement', ISO
5 ISO;1EC 17025, 1999, 'General Requirement for the Competence of Testing and Calibration Laboratory', ISO