• DocumentCode
    845291
  • Title

    A measurement of the NBS electrical watt in SI units

  • Author

    Olsen, P. Thomas ; Elmquist, Randolph E. ; Phillips, William D. ; Williams, Edwin R. ; Jones, George R. ; Bower, Vincent E.

  • Author_Institution
    NBS, Gaithersburg, MD, USA
  • Volume
    38
  • Issue
    2
  • fYear
    1989
  • fDate
    4/1/1989 12:00:00 AM
  • Firstpage
    238
  • Lastpage
    244
  • Abstract
    The National Bureau of Standards (NBS) electric watt in SI units to be: WNBS/W=KW =1-(16.69±1.33) p.p.m. The uncertainty of 1.33 p.p.m. has the significance of a standard deviation and includes the best estimate of random and known or suspected systematic uncertainties. The mean time of the measurement is May 15, 1988. Combined with the measurement of the NBS ohm in SI units: ΩNBS/Ω=KΩ =1-(1.593±0.022) p.p.m., this leads to a Josephson frequency/voltage quotient of EJ=E0[1+(7.94±0.67) p.p.m.] where E0=483, 594 GHz/V
  • Keywords
    Josephson effect; power measurement; units (measurement); Josephson frequency/voltage quotient; NBS; National Bureau of Standards; SI units; measurement standards; ohm; random uncertainties; standard deviation; systematic uncertainties; watt; Coils; Current measurement; Electric variables measurement; Force measurement; Laboratories; Measurement standards; NIST; Power measurement; Time measurement; Voltage;
  • fLanguage
    English
  • Journal_Title
    Instrumentation and Measurement, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9456
  • Type

    jour

  • DOI
    10.1109/19.192279
  • Filename
    192279
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=845291