Reference Standards, Uncertainties, and the Future of the NIST Electronic Kilogram
Richard L. Steiner, David B. Newell, J. Schwarz, Edwin R. Williams
The National Institute of Standards and Technology (NIST) watt balance experiment recently made a new determination of Planck's constant with a relative standard uncertainty of 87 x 10-9 (k = 1), concurrently with an upper limit on the drift rate of the SI kilogram mass standard. This paper briefly describes the calibration work necessary to maintain several reference standards and subsystems for this experiment, and mentions several noise sources. These discussions suggest design improvements being built into the next generation electronic kilogram experiment, which will try to obtain 5 x 10-9 relative standard uncertainty in order to monitor the SI kilogram.
Proc. 1999 National Conference of Standards Laboratories Workshop and Symposium (NCSL)
, Newell, D.
, Schwarz, J.
and Williams, E.
Reference Standards, Uncertainties, and the Future of the NIST Electronic Kilogram, Proc. 1999 National Conference of Standards Laboratories Workshop and Symposium (NCSL), Charlotte, NC, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=8399
(Accessed November 28, 2023)