한국유체기계학회 논문집 (The KSFM Journal of Fluid Machinery)

한국유체기계학회 (Korean Society for Fluid machinery)
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액체용 중량식 유량계 교정장치의 일방향 Diverter 특성연구

Characteristics of Uni-directional Diverter for Gravimetric Calibration Facility

  • 투고 : 2016.09.08
  • 심사 : 2016.10.10
  • 발행 : 2017.02.01
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초록

Diverter is an essential element in gravimetric calibration method of flowmeter. Error of diverter are influenced by flow velocity profile of nozzle outlet, motion velocity of diverter and detecting location. That's why, time detection position of diverter is tuned through repetitive test for minimizing error of diverter. Further the diverter must be compared with the other institutions test since the influence on the accuracy of the flow meter used in the test. In this paper, errors (flow velocity profile of nozzle outlet, motion velocity of diverter and detecting location) of diverter are decreased by produced uni-direction diverter and error of gravimetric calibration system is decreased. Uni-direction diverter is calibrated by gravimetric calibration system with precision flowmeter, the flowmeter is calibrated by pipe prover and other institutions and uni-direction diverter is evaluated. Uni-direction diverter is not influenced by flow velocity profile of nozzle outlet, motion velocity of diverter and detecting location. As a result, Uni-direction diverter can calibrate in wider scope since increasing ratio of maximum and minimum flow rate of uni-direction diverter.

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참고문헌

  1. ISO 4185, 1980, "Measurement of liquid flow in closed conduits - Weighing method".
  2. ISO/IEC 17025, 2005, "Gerneral requirements for the competence of testing and calibration laboratory".
  3. Lee, D. K. and Park, J. H., 2008, "Uncertainty Characteristics of Diverter for Flowmeter Calibration System," The KSFM Journal of Fluid Machinery, Vol. 11, No. 3, pp. 50-55. https://doi.org/10.5293/KFMA.2008.11.3.050
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  8. Nam, K. H., Park, Y. C., and Park, J. H., 2013, "Impact of Yearly Drift on the Measurement Uncertainty of Pipe Prover," KSME Conference.
  9. ISO/IEC 17043, 2010, "Conformity Assessment -General Requirements for Proficiency Testing - Annex B Statistical Methods for Proficiency Testing".
  10. ISO/IEC GUIDE 98-3, 2008, "Uncertainty of Measurement - Part 3:Guide to the Expression of Uncertainty in Measurement".