Acta Metrologica Sinica  2014, Vol. 35 Issue (6): 591-594    DOI: 10.3969/j.issn.1000-1158.2014.06.15
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Realization for the Secondary Standard of Density
LUO Zhi-yong,LI Zhan-hong
National Institute of Metrology, Beijing  100029, China
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Abstract  he basic principle, apparatus, procedure and parameters by the method of hydrostatic weighing was introduced. With the hydrostatic weighing, the density dessimination from the solid density primary standard—silicon sphere to the second primary standard—a group of 137 hydrometers has been realized. The measuring uncertainty in full range has been evaluated in detail.
Key wordsMetrology      Value repetition      Hydrostatic weighing      Glass hydrometer      Solid density primary       standard     
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LUO Zhi-yong
LI Zhan-hong
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LUO Zhi-yong,LI Zhan-hong. Realization for the Secondary Standard of Density[J]. Acta Metrologica Sinica, 2014, 35(6): 591-594.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2014.06.15     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2014/V35/I6/591
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