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Uncertainty of gauge block calibration by mechanical comparison: a worked example. Case 1: gauges of like material

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.4224/40003376
AuthorSearch for: 1; Search for: 1
Affiliation
  1. National Research Council of Canada. NRC Institute for National Measurement Standards
SponsorSearch for: National Research Council of Canada
FormatText, Technical Report
Abstract
This document provides a worked example of a typical evaluation of measurement uncertainty for the case of the calibration of gauge blocks by mechanical comparison. The comparison involves gauges of known and unknown length, herein referred to as the standard gauge and test gauge respectively. In laboratories that provide service to many clients, the lab’s reference standard gauge is spared excessive handling and wear by calibrating a working standard gauge, which is used to calibrate the client gauge. Our two-gauge comparison model is general, in that it can apply first to the comparison of the reference standard, and working standard gauge, and then to the working standard and client gauges. At the end of the paper, it is shown how the uncertainties propagate along the traceability chain, from the reference standard, to the working standard, to the client gauge. It is assumed that the reader is familiar with the gauge blocks, the mechanical comparator and the principles of their metrology. Our objective is to guide the reader through the evaluation of the overall calibration uncertainties.
Publication date
PublisherNational Research Council of Canada
LanguageEnglish
NRC numberNRCC 39998
NRC-INMS-244
NPARC number8897275
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Record identifiera3c7300b-3e9f-43df-8cbf-f876803b1247
Record created2009-04-22
Record modified2024-07-08
Date modified: