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Title: Biases In Mass Measurement Caused By Altitude
Author: Mark Fritz
Source: 1996 Measurement Science Conference
Year Published: 1996
Abstract: Here in Denver, we deal with the effects of altitude on our measurement process on a daily bases. In the field of mass measurement, values are expressed in two ways: The first is the mass in a vacuum often referred to as true mass, the second is apparent mass which is also called conventional mass or mass in air. It is not practical to weigh in a vacuum and air density varies with altitude and weather. Therefore, apparent mass by convention is reported as: A weighing of a mass standard with a density of 8.0 g/cm3 in 20C air with a density of 1.2 mg/cm3. The problem with this is mass standards are not exactly 8.0 g/cm3 and at altitude, air is not 1.2 mg/cm3. If corrections for this are not applied the measurement will have a bias. In this paper I will show the effects of uncorrected measurements.

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