Transcription of Issue 2 - National Physical Laboratory
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Issue 2 - National Physical Laboratory
good Practice Guide No. 40 Callipers and micrometersDavid FlackIssue 2 measurement good Practice Guide No. 40 Callipers and Micrometers David Flack Engineering measurement Division National Physical Laboratory ABSTRACT This guide covers the use of callipers and micrometers for internal, external and depth measurements. The issues covered include the effect of measurement force, both when a ratchet is present ( , micrometers) and when it is not, particularly when measuring soft materials; use and general care, support and handling of micrometers and callipers; guidance on choosing the most appropriate equipment type for the measurement ; advice on calibration and verification methods and how to generate an uncertainty budget for a measurement ; use of electronic instruments, fault awareness, temperature effects; awareness of errors introduced into internal knife edge jaws as external/internal jaws wear; and standard calibration methods and reporting of results.
Measurement Good Practice Guide No. 40 . Callipers and Micrometers . David Flack . Engineering Measurement Division . National Physical Laboratory . ABSTRACT
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