Abstract
Abstract:This paper presents a detailed measurement uncertainty analysis for the calibration of gauge blocks made from like materials using a mechanical comparator consisting of opposing styli and a digital readout. After discussing the influence parameters affecting the calibration process, a mathematical model is developed that leads to a measurement equation relating the length of the client's gauge block to measurements of the standard gauge block and associated temperature corrections. Following the ISO “Guide to the Expression of Uncertainty in Measurement,” all of the uncertainty components and their sensitivity components are calculated. These components include factors related to the calibration of the standard, the measured difference between the client's gauge and the standard gauges, and various temperature differences. After discussing a specific measurement process in a typical laboratory environment, all of the uncertainty components are quantified and then combined in quadrature. The resul...
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