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Title: The Concept Of Conventional Mass In Astm E 617 And Oiml R 111.
Author: Walter E. Kupper
Source: 1999 Measurement Science Conference
Year Published: 1999
Abstract: ASTM Standard E 617 has recently been revised, and a major revision of OIML R 111 is currently in process. The concept of conventional mass, which is essential to both standards, is discussed in detail. A known problem with this concept exists at higher altitudes (starting as low as 1000 to 2000 feet above sea level) where the density of air is substantially different from 1.2 mg/cm3. The paper describes solutions that have been proposed for the revision of OIML R 111, including a formula for calculating correction values to be applied at higher altitudes.

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