VOLUME MEASUREMENT OF 1 kg WEIGHT BY HYDROSTATIC WEIGHING USING TWO ZERODUR DENSITY STANDARD SPHERES
Kyung-Ho Chang, Yong-Jae Lee
Abstract:
The hydrostatic weighing apparatus using two zerodur density standard spheres is built, and the weight exchanger, which is composed of a weight pan with the shape of a conoid and the standard weights with a slot, is constructed. In addition, the temperature and density gradient of transfer liquid are precisely corrected according to the measuring position of the liquid container. As a result, the volume of 1 kg standard weight in a class E1 obtains 124,90388 cm³ at 20°C with a precision of 8.4·10-5 cm³ (0,67 ppm) by hydrostatic weighing, and the measurement uncertainty shows 3.0·10-4 cm³ (2,4 ppm) in a confidence level of 95% with coverage factor k = 2.
Keywords:
hydrostatic weighing, weight exchanger
Download:
PWC-2003-TC3-011.pdf
DOI:
-
Event details
Event name:
XVII IMEKO World Congress
Title:

Metrology in the 3rd Millennium

Place:
Dubrovnik, CROATIA
Time:
22 June 2003 - 28 June 2003
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