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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.
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［6］罗志勇，陈朝晖，顾英姿,等. 一种密度精密测量方法［J］. 计量学报，2010,31（4）:330-333.
［7］Jesus A, John D, Vera E. Hydrometer calibration by hydrostatic weighing with automated liquid surface positioning［J］. Measurement Science & Technology,2008, 19(1): 141-150. |
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2014, Vol. 35 
