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Uncertainty and Dimensional Calibrations; NIST J Res Nov-Dec 97 102-6; 1997


Doiron, T.; Stoup, J.

J Res NIST 102-6; 30p. November-December 1997.

Keywords:
Angle standards; calibration; dimensional metrology; gage blocks; gages; optical flats; uncertainty; uncertainty; uncertainty budget.

Abstract:
The calculation of uncertainty for a measurement is an effort to set reasonable bounds for the measurement result according to standardized rules. Since every measurement produces only an estimate of the answer, the primary requisite of an uncertainty statement is to inform the reader of how sure the writer is that the answer is in a certain range. This report explains how we have implemented these rules for dimensional calibrations of nine different types of gages: gage blocks, gage wires, ring gages, gage balls, roundness standards, optical flats, indexing tables, angle blocks, and sieves.


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