Air density determination using 1 kg buoyancy mass comparison(III)

被引：0

作者：

Chung, JW ^{[1
]}

Chang, KH ^{[1
]}

Lee, WG ^{[1
]}

Kim, KP ^{[1
]}

机构：

[1] Korea Res Inst Stand & Sci, Div Phys Metrol, Taejon 305600, South Korea

来源：

JOINT INTERNATIONAL CONFERENCE IMEKO TC3/TC5/TC20 | 2002年 / 1685卷

关键词：

air density; buoyancy; mass;

D O I：

暂无

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In calibration of secondary 1 kg stainless steel mass standard from a platinum-iridium kilogram prototype, a major uncertainty arises from the measurement of air density for the buoyancy correction. This paper is continued to the reference[1]. An experimental determination of air density using buoyancy pairs and a vacuum balance has been carried out and its results were compared with those of the CIPM formula 81/91. The environmental measurement instruments used for this experiment are different from those previously used. Also the true mass difference between buoyancy pairs in vacuum was measured at mass laboratory of NMIJ in Japan and compared with the KRISS result. The disagreement between air density measurements by the 1 kg BA-pair and those by CIPM formula is 5.1x10(-4) kg/m(3), but the standard deviation of the difference between both methods has been improved, to 5.3x10(-5) kg/m(3) compared to 1.5x10(-4) kg/m(3) by the previous experiment.

引用

页码：273 / 277

页数：5