PT-IR PROTOTYPE KILOGRAM AS A BUOYANCY ARTEFACT FOR IN SITU DIRECT DETERMINATION OF AIR DENSITY

W. G. Lee, Y. J. Lee, J. W. Chung

Abstract

The density of air was directly measured by using a Pt-Ir kilogram and a stainless steel kilogram weight as buoyancy artefacts (BAs) in a comparator equipped with an automatic weight exchanger capable of handling four weights. The other two stainless steel weights loaded on the same weight exchanger were compared with the prototype kilogram by using the air density measured in situ. The in situ BA method determined the mass values with less uncertainty than the CIPM equation method.

Keywords

air density, buoyancy artefacts, prototype kilogram, mass measurement

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IMEKO-WC-2012-TC3-P23.pdf

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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