Magnetic properties comparison of mass standards

doi:10.1088/0026-1394/43/5/014

Magnetic properties comparison of mass standards among seventeen national metrology institutes

L O Becerra et al 2006 Metrologia 43 426-434 doi: 10.1088/0026-1394/43/5/014

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L O Becerra¹, J Berry², C S Chang³, G D Chapman⁴, J W Chung⁵, R S Davis⁶, I Field⁷, P Fuchs⁸, U Jacobsson^9,18, S M Lee¹⁰, V M Loayza¹¹, T Madec¹², C Matilla¹³, A Ooiwa¹⁴, F Scholz¹⁵, C Sutton¹⁶ and I van Andel¹⁷
¹ Centro Nacional de Metrologia (CENAM), CP 76900, Querétaro, Qro, Mexico
² National Physical Laboratory (NPL), Teddington, Middlesex, TW11 0LW, UK
³ Center for Measurement Standards, Industrial Technology Research Institute (CMS/ITRI), Hsinchu, Taiwan 300
⁴ Institute for National Measurement Standards, National Research Council (INMS/NRC), Ottawa, Ontario, K1A 0R6, Canada
⁵ Korea Research Institute of Standards and Science (KRISS), Box 102 Yousung, Taejon, 305-600, Korea
⁶ Bureau International des Poids et Mesures (BIPM), Pavillon de Breteuil, F-92310, Sèvres Cedex, France
⁷ National Metrology Laboratory (CSIR-NML), PO Box 395, Pretoria 0001, South Africa
⁸ Metrologie und akkreditierung schweiz (METAS), Lindenweg 50, CH-3003 Bern-Wabern, Switzerland
⁹ Swedish National Testing and Research Institute (SP), PO Box 857, SE-501 15 Boräs, Sweden
¹⁰ Standards, Productivity and Innovation Board (SPRING Singapore), 1 Science Park Drive, Singapore 118221, Singapore
¹¹ Instituto Nacional de Metrologia (INMETRO), Av. N.S. das Graças, 50-Xerém, Duque de Caxias–RJ, Brazil 25250-020
¹² Laboratoire national de métrologie et d'essais (LNE), 1, Rue Gaston Boissier, 75015 Paris, France
¹³ Centro Español de Metrologia (CEM), c/ del Alfar, 2 – Apartado 37, 28760 Tres Cantos (Madrid), Spain
¹⁴ National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (NMIJ/AIST), Central 3, 1-1, Umezono 1-chome, Tsukuba, 305-8563, Japan
¹⁵ Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
¹⁶ Measurement Standards Laboratory of New Zealand, Industrial Research Limited (MSL), PO Box 31310, Lower Hutt, New Zealand
¹⁷ Nederlands Meetinstituut, Van Swinden Laboratorium (NMi-VSL), Thijsseweg 11, Box 654, 2600 AR Delft, The Netherlands
¹⁸ Present address: European Commission, Joint Research Centre, Institute for Reference Materials and Measurements (IRMM), Retieseweg 111, B-2440 Geel, Belgium.

Abstract. The ubiquitous technology of magnetic force compensation of gravitational forces acting on artifacts on the pans of modern balances and comparators has brought with it the problem of magnetic leakage from the compensation coils. Leaking magnetic fields, as well as those due to the surroundings of the balance, can interact with the artifact whose mass is to be determined, causing erroneous values to be observed. For this reason, and to comply with normative standards, it has become important for mass metrologists to evaluate the magnetic susceptibility and any remanent magnetization that mass standards may possess. This paper describes a comparison of measurements of these parameters among seventeen national metrology institutes. The measurements are made on three transfer standards whose magnetic parameters span the range that might be encountered in stainless steel mass standards.

Print publication: Issue 5 (October 2006)
Received 3 April 2006
Published 21 September 2006

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Magnetic properties comparison of mass standards among seventeen national metrology institutes

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