Article2012

Final report on key comparison CCM.P-K13 in the range 50 MPa to 500 MPa of hydraulic gauge pressure

Wladimir Sabuga · D A Olson · J C Torres · Sanjay Yadav · Y Jin · Tokihiko Kobata +1 more

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Scientific Measurement and Uncertainty Evaluation Advanced Measurement and Metrology Techniques Advanced Electrical Measurement Techniques

Abstract

This report describes a CCM key comparison of hydraulic pressure standards of seven National Metrology Institutes, listed in the chronological order of their measurements, that was carried out in the period from December 2008 to March 2010 in order to determine their degrees of equivalence in the range 50 MPa to 500 MPa of gauge pressure. The pilot laboratory was PTB. The primary pressure standards were pressure balances of different design equipped with piston–cylinder assemblies operated in free-deformation, controlled-clearance or re-entrant operation mode. The transfer standard was a piston–cylinder assembly in a pressure balance. The pressure-dependent effective areas of the transfer standard at specified pressures were reported by the participants and led to the reference values calculated as medians. Results of all participants excepting NIM agree with the reference values and with each other within the expanded uncertainties calculated with a coverage factor 2, most of them even within their standard uncertainties. In addition, the results were analysed in terms of the zero pressure effective area and the pressure distortion coefficient. Also for them agreement within expanded uncertainties ( k = 2) is observed. The results of the comparison demonstrate equivalence of the laboratory standards and of the Calibration and Measurement Capabilities currently presented in the BIPM key comparison database. Main text. To reach the main text of this paper, click on Final Report . Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/ . The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

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2002The evaluation of key comparison data 2000Possible advantages of a robust evaluation of comparisons 1998Comparison of methods for calculating distortion in pressure balances up to 400 MPa - EUROMET Project 256

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2018Role of National Pressure and Vacuum Metrology in Indian Industrial Growth and Their Global Metrological Equivalence 2005Accurate determination of equilibrium state between two pressure balances using a pressure transducer 2019Comparison of Monte Carlo Simulation, Least Square Fitting and Calibration Factor Methods for the Evaluation of Measurement Uncertainty Using Direct Pressure Indicating Devices 2010Investigations on Measurement Uncertainty and Stability of Pressure Dial Gauges and Transducers 2017High pressure metrology for industrial applications 2018Evaluation and correction for long-term drift of hydraulic pressure gauges monitoring stable and constant pressures 2014Final report on key comparison APMP.M.P-K13 in hydraulic gauge pressure from 50 MPa to 500 MPa 2006Current Status of Pressure Standards at NPLI and Our Experiences with the Key Comparison Data Base (KCDB)

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