Experimental research on mass determination of non-metal weights

M. Hu, J. Wang, C. Cai, R. Zhong, K. Jiao, D. Wu, P. Cheng


With the revision of the definition of the kilogram, more and more weights made of non-metal material, such as silicon spheres and PM 2.5 film, need to be determined with high accuracy. As conventional mass is commonly used in mass metrology, this paper discusses the mass-measuring process for silicon and PM 2.5 film. Electrostatic eliminators are used to eliminate the electrostatic effects of non-metal material to improve the stability of mass measurement. Due to the big difference of weights’ densities, the air buoyancy correction and its uncertainty evaluation are also conducted.

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DOI: http://dx.doi.org/10.21014/acta_imeko.v9i5.932