Abbott Patrick J, Kubarych Zeina J
National Institute of Standards and Technology, Gaithersburg, MD 20899.
J Res Natl Inst Stand Technol. 2013 Aug 26;118:353-8. doi: 10.6028/jres.118.016. eCollection 2013.
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.
国际单位制（SI）的质量单位千克，是SI系统七个基本单位中唯一仍基于实物定义的单位。一旦满足质量及相关量咨询委员会（CCM）建议的某些实验条件，它将根据普朗克常数进行重新定义。为了更好地反映实际情况，重新定义可能会伴随着国家计量院（NMI）通过实物传递给客户的不确定度增加，若采用某些砝码公差，这可能会对二级校准实验室使用的参考标准产生影响。本文将比较千克重新定义后精密质量校准实验室的法定计量要求与当前基于国际千克原器（IPK）实现千克的能力。
