Open AccessThe New Kilogram Definition and its Implications for High-Precision Mass Tolerance Classes
Author(s) -
Patrick J. Abbott,
Zeina J. Kubarych
Publication year - 2013
Publication title -
journal of research of the national institute of standards and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.202
H-Index - 59
eISSN - 2165-7254
pISSN - 1044-677X
DOI - 10.6028/jres.118.016
Subject(s) - kilogram , metrology , calibration , artifact (error) , realization (probability) , planck constant , computer science , units of measurement , international system of units , standard uncertainty , measurement uncertainty , nuclear engineering , mathematics , physics , statistics , engineering , body weight , medicine , artificial intelligence , quantum mechanics , quantum
The SI unit of mass, the kilogram, is the only remaining artifact definition in the seven fundamental units of the SI system. It will be redefined in terms of the Planck constant as soon as certain experimental conditions, based on recommendations of the Consultative Committee for Mass and Related Quantities (CCM) are met. To better reflect reality, the redefinition will likely be accompanied by an increase in the uncertainties that National Metrology Institutes (NMIs) pass on to customers via artifact dissemination, which could have an impact on the reference standards that are used by secondary calibration laboratories if certain weight tolerances are adopted for use. This paper will compare the legal metrology requirements for precision mass calibration laboratories after the kilogram is redefined with the current capabilities based on the international prototype kilogram (IPK) realization of the kilogram.
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