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Research paper : Improvement of reliability in pressure measurements and international mutual recognition (T. Kobata et al.)−224−Synthesiology - English edition Vol.4 No.4 (2012) References[1]A. Ono: Globalizing metrological standards, AIST Today, 4 (2), 21 (2004) (in Japanese).[2]M. Tanaka: Innovation and metrology, AIST Today, 10 (12), 2 (2010) (in Japanese).[3]CIPM, Mutual recognition of national measurement standards and of calibration and measurement certificates issued by national metrology institutes (MRA), (1999).[4]A. Ooiwa: Mass and related quantities; Mechanical metrology, Journal of the Society of Instrument and Control Engineers, 48 (4), 313-320 (2009) (in Japanese).[5]T. Kobata: Development, maintenance and dissemination of pressure standard and improvement of reliability, Netsu Sokutei, 38 (2), 57-64 (2011) (in Japanese).[6]Pressure and Vacuum Standards Section: R&D of pressure and vacuum standards and calibration service, Journal of the Japan Society of Precision Engineering, 77 (8), 755-756 (2011) (in Japanese).NotesNote 1) The deadweight pressure balance or deadweight pressure gauge is commonly called “pressure balance”, “piston gauge”, or “deadweight tester” in English. In this paper, it will be called the “pressure balance” which is the term generally used in the technical documents for various standards including JIS.Note 2) In the Japan Calibration Service System under the Measurement Laws, the lower case letters “jcss” is used in the calibration certificate issued by the national metrology institute, and the upper case letters “JCSS” is used on the calibration certificate issued by the accredited calibration labs.In the highly advanced and diversified social and industrial activities, the ensuring of reliability of pressure measurement according to usage and precision are demanded. The development of pressure calibration and standard provision that are easier, faster, and lower in cost, as well as being practical and efficient, are important, taking advantage of the operability and convenience of the digital pressure gauge in the future.We shall engage in further R&D to maintain and improve the reliability of various pressure measurements in society and the industrial sites, by organizing and expanding the pressure standard provision system.AcknowledgementsI am deeply grateful to Dr. Akira Ooiwa, head of Mechanical Metrology Division, National Metrology Institute of Japan, who gave us valuable advice and cooperation, and the people of the Pressure and Vacuum Standard Section.[7]Heisei 14 Nendo Butsuri Hyojun Nizu Chosa Hokokusho (Survey Report for Physical Standard Demand FY 2002), National Metrology Institute of Japan, AIST (2003) (in Japanese).[8]M. Kojima, T. Kobata. K. Saitou and M. Hirata: Development of small different pressure standard using double pressure balances, Metrologia, 42 (6), S227-S230 (2005).[9]T. Kobata and K. Ide: Development of pressure standard up to 1 GPa using a precise pressure multiplier, Proceedings of SICE-ICASE International Joint Conference 2006, 3367-3371 (2006).[10]H. Kajikawa, T. Kobata and A. Ooiwa: Features of a new controlled-clearance pressure balance and in situ mass calibration of its weights, Trans. of the Society of Instrument and Control Engineers, 44 (3), 219-226 (2008).[11]JIS B 7610-1, -2, -3, Pressure balances (2000) (in Japanese).[12]JIS B 7547, Procedures of characterization and calibration for digital pressure gauges (2008) (in Japanese).[13]JIS B 7505-1, Aneroid pressure gauges - Part 1: Bourdon tube pressure gauge (2007) (in Japanese).[14]A. Ooiwa, M. Ueki and R. Kaneda: New mercury interferometric baromanometer as the primary pressure standard of Japan, Metrologia, 30 (6), 565-570 (1994).[15]M. Kojima. T. Kobata and K. Saitou: Study on calibration procedure for differential pressure transducers, Proceedings of IMEKO 20th TC3, 3rd TC16 and 1st TC22 International Conference, ID-044 (2007).[16]H. Kajikawa and T. Kobata: Effects of pressurization procedures on calibration results for precise pressure transducers, Meas. Sci. Technol., 21 (6), 065104 (2010).[17]T. Kobata and D. A. Olson: Accurate determination of equilibrium state between two pressure balances using a pressure transducer, Metrologia, 42 (6), S231-S234 (2005).[18]T. Kobata: Improved methods for comparing gas and hydraulic pressure balances, Metrologia, 46 (5), 591-598 (2009).[19]T. Kobata et al.: Final report on key comparison APMP. M.P-K7 in hydraulic pressure from 10 MPa to 100 MPa, Metrologia, 42 Tech. Suppl., 07006 (2005).[20]T. Kobata et al.: Final report on key comparison APMP. M.P-K5 in differential pressure from 1 Pa to 5000 Pa, Metrologia, 44 Tech. Suppl., 07001 (2007).[21]T. Kobata et al.: Final report on key comparison APMP. M.P-K7.1 in hydraulic gauge pressure from 10 MPa to 100 MPa, Metrologia, 46 Tech. Suppl., 07008 (2009).[22]T. Kobata et al.: Final report on supplementary comparison APMP.M.P-S8 in hydraulic gauge pressure from 100 MPa to 1000 MPa, Metrologia, 47 Tech. Suppl., 07009 (2009).[23]T. Kobata: Assurance of the international conformity of pressure standard-International comparison of hydraulic pressure standard from 10 MPa to100 MPa, AIST Today, 6 (5), 34-35 (2006) (in Japanese).[24]T. Kobata: Characterization of quartz Bourdon-type high-pressure transducers, Metrologia, 42 (6), S235-S238 (2005).[25]W. Sabuga et al.: Final report on key comparison CCM. P-K7 in the range 10 MPa to 100 MPa of hydraulic gauge pressure, Metrologia, 42 Tech. Suppl., 07005 (2005).[26]M. Kojima, H. Kajikawa and T. Kobata: Development of remote calibration technology for digital pressure gauge, Measurement Standards and Metrology Management, 58 (4), 56-61 (2009) (in Japanese).[27]T. Kobata: Full Research in pressure standard that supports the social infrastructure-Upgrading and dissemination of the pressure standard and the development of new calibration technology, AIST Today, 10 (1), 18-19 (2010) (in Japanese).

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