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Metrological relationaships between primary vacuum standards.

Redgrave, F J; Music, V (1999) Metrological relationaships between primary vacuum standards. NPL Report. CMAM 46

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Abstract

Over the past 20 years, despite poor reproducibility of the transfer standards, several international comparisons have suggested that agreement between the primary vacuum standards held at national laboratories may not be as robust as indicated by the associated measurement uncertainties. This report reviews the results of such comparisons and analyses the level of agreement between laboratories and the various types of primary standards used, and also details internal comparisons between NPL' s primary vacuum standards. The report highlights weaknesses in the physical models and assumptions that underpin the different types of standard and proposes some refinements including experimental protocols. It also identifies areas where, historically, a lack of documentation may have masked short-comings in either the models or experimental practice.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CMAM 46
Subjects: Engineering Measurements
Engineering Measurements > Mass, Force, Pressure
Last Modified: 02 Feb 2018 13:18
URI: http://eprintspublications.npl.co.uk/id/eprint/1232

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