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Uncertainties Related to Thermal Expansion in Dimensional Metrology; NCSLI Measure Paper 011-2006; 2006


Doiron, T.

NCSLI Measure 011-2006; 13p. 2006.

Abstract:
Thermal expansion effects are very important in dimensional metrology. In this paper a measurement model, and associated equations, are developed for the case of a one-dimensional measurement of a steel test gage using a measuring machine and master gage. After presenting the uncertainty components for this measurement, several example measurement situations with difference levels of temperature control are calculated and discussed. For each situation, the magnitude of the different sources of uncertainty are compared in order to rationally allocate resources to improve the overall measurement uncertainty.


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