INTRODUCTION Performing a repeatability test is an essential part of estimating uncertainty in measurement. It is the most common experiment performed to collect Type A Uncertainty data. Additionally, most accreditation bodies require that you include repeatability data in your uncertainty budgets. However, many people have trouble with performing a repeatability test. They do […]
When Repeatability is Zero Once in a while, you may encounter a scenario where your measurement repeatability is zero. This is common for certain types of measurements, such as: measuring a gauge block with a caliper, placing a calibrated mass on a scale or balance, or calibrating a handheld DMM with a multifunction […]
Introduction Estimating uncertainty in measurement for chemistry laboratories is quite different compared to other types of laboratories. Most chemistry labs need to use two different processes to estimate uncertainty. Typically, there is one process to evaluate uncertainty for physical measurements and another process for analytical chemistry measurements. Although each uncertainty analysis uses the GUM […]
Introduction Type A and Type B uncertainty are two elements that are commonly discussed in estimating measurement uncertainty. Uncertainty type is covered in most measurement uncertainty guides and uncertainty training courses. Auditors review uncertainty budgets to make sure the components are categorized correctly. However, have you ever looked at most of the information published […]
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