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Title: Balance Repeatability And Reproducibility Effects On Measurement Uncertainty
Author: A. Harper Shull, John P. Clark
Source: 2002 Measurement Science Conference
Year Published: 2002
Abstract: Most balance manufacturers do not list an uncertainty estimate for measurements made with their balances. Their specifications usually include eccentricity, linearity, and repeatability. The latter is a measure of the random variability of the instrument, usually expressed in scale divisions. Further, the repeatability is usually based on 10 consecutive measurements of a mass standard. The authors have previously described methods currently being used to estimate the uncertainty of measurements made with electronic balances. The random errors associated with mass measure-ments obscure the true value of the artifact being weighed. Therefore, it is important to include the best estimate of the magnitude of these errors in the stated uncertainty.

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