The Planck constant, watt and vacuum balances, and an evolving Mise en pratique for the kilogram in North America

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Conference2012 Conference on Precision Electromagnetic Measurements (CPEM 2012), 2012-07-1 - 2012-07-6, Washington, DC, USA
Pages422423; # of pages: 2
Subjectfundamental constants; fundamental electrical measurements; magnetic levitation balance; mass metrology; revised SI; vacuum mass; watt balance
AbstractWe report preparations underway at the National Institute of Standards and Technology (NIST) in the United States and at the National Research Council (NRC) in Canada to support the redefinition of the international system of units (SI) and the development of a Mise en pratique for the unit of mass. NIST and the NRC possess two of the world's most precise moving coil watt balances and are developing a collaborative plan to reconcile differences between the respective measurement platforms by testing their ability to mutually realize the kilogram from the Planck constant. The important role to be played by mass metrology and new facilities, such as the NIST magnetic levitation balance and the NRC vacuum comparator, to establish the necessary link between a mass as measured in vacuum and its value in air will be considered.
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number21269117
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Record identifier4abacc13-bed1-4650-ba0c-0c5682c8a8f2
Record created2013-12-06
Record modified2016-05-09
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