Regulatory bodies are increasingly asking for uncertainty estimates in the measurements from testing and calibration labs. There is also a lot of confusion as to the correct approach to take when determining uncertainty for a precision scale. Devices like the analytical balance are especially confusing. This paper examines this problem. The primary issue is the inconsistency of terminology used. To compound that manufacturer specifications do not provide estimates of the uncertainty. The general literature on the subject cite several ways to estimate uncertainty which is highlighted in the paper along with a discussion on the advantages and disadvantages of the various methods for estimating uncertainty.
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