A tabletop-sized Kibble balance (KIBB-g1) designed to directly realize mass at the gram-level range with uncertainties on the order of parts in 10$^6$ has been developed at the National Institute of Standards and Technology (NIST). The masses of a nominally 5\,g and 1\,g weight were determined with 1-$\sigma$ standard uncertainties of 9.0\,$\upmu$g and 6.7\,$\upmu$g, respectively. The corresponding relative uncertainties are $1.8\times 10^{-6}$ and $6.3\times 10^{-6}$. The construction of the instrument, capabilities, and full uncertainty budgets are presented in this manuscript.

中文翻译：

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NIST KIBB-g1 桌面粗磨天平的性能

美国国家标准与技术研究院 (NIST) 开发了一种桌面大小的 Kibble 天平 (KIBB-g1)，旨在直接实现克级范围内的质量，而零件的顺序不确定性为 10$^6$。标称 5\,g 和 1\,g 重量的质量分别用 9.0\,$\upmu$g 和 6.7\,$\upmu$g 的 1-$\sigma$ 标准不确定度确定。对应的相对不确定性为 $1.8\times 10^{-6}$ 和 $6.3\times 10^{-6}$。本手稿介绍了仪器的构造、功能和完整的不确定性预算。