The METAS watt balance: a summary of progress

Author

Beer, W. ; Eichenberger, A.L. ; Jeanneret, B. ; Jeckelmann, B. ; Pourzand, A.R. ; Richard, P. ; Schwarz, J.P.

Author_Institution

Swiss Fed. Office of Metrol. & Accreditation (METAS), Bern, Switzerland

fYear

2002

fDate

16-21 June 2002

Firstpage

576

Lastpage

577

Abstract

The Swiss Federal Office of Metrology and Accreditation (METAS) has been continuing its drive towards a 100 g watt balance apparatus with a relative standard uncertainty of 1/spl times/10/sup -8/. The objective of this kind of measurement is, presently, to measure the Planck constant and improve the consistency of the SI. In the future it is hoped that the watt balance approach will help in a redefinition of the kilogram. Currently the experiment is producing preliminary measurements reproducible at the 1 ppm level. Our progress, measurements, and plans for the future are presented.

Keywords

balances; constants; mass measurement; measurement standards; measurement uncertainty; 100 g; METAS watt balance apparatus; Planck constant measurement; SI consistency improvement; balance relative standard uncertainty; kilogram redefinition; measurement reproducibility; Accreditation; Coils; Current measurement; Force measurement; Geometry; Hysteresis; Magnetic field measurement; Mechanical variables measurement; Metrology; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on

Conference_Location

Ottawa, Ontario, Canada

Print_ISBN

0-7803-7242-5

Type

conf

DOI

10.1109/CPEM.2002.1034978

Filename

1034978