Uncertainty reduction due to correlation effects in weighing during the preparation of primary gas standards

被引：18

作者：

Milton, MJT ^{[1
]}

Woods, PT ^{[1
]}

Holland, PE ^{[1
]}

机构：

[1] Natl Phys Lab, Ctr Opt & Environm Metrol, Teddington TW11 0LW, Middx, England

来源：

METROLOGIA | 2002年 / 39卷 / 01期

关键词：

D O I：

10.1088/0026-1394/39/1/12

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The accurate weighing of gas into high-pressure cylinders plays a central role in providing traceability for primary gas mixtures. The uncertainties in the masses of successive components added to such mixtures are significantly correlated. We show that a consequence is that the amount fraction of the resulting mixture is not influenced by changes in buoyancy due to the linear expansion of the cylinder. This result will provide a useful simplification to some procedures used in gas metrology.

引用

页码：97 / 99

页数：3