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TitleThe pressure balance as an absolute pressure standard
Publication TypeJournal Article
Year of Publication1994
AuthorsSutton, C.M.
Pagination591 - 594
Date Published1994
ISSN00261394 (ISSN)
AbstractGas-operated pressure balances as primary standards for absolute pressure are discussed, with emphasis on obtaining the effective area from the piston-cylinder dimensions and the mass in vacuum of the pressure balance floating element. The performance of one 35 kPa pressure balance is presented showing that an accuracy of better than 10 ppm can be achieved. Repeat measurements of the piston-cylinder dimensions ten years apart gave the same calculated effective areas to within 3 ppm. These calculated areas vary by up to 2 ppm with gas pressure and gas type. Comparison with two interferometric manometers, using other nitrogen gas-operated pressure balances as transfer standards, resulted in effective areas -7 ppm and 2,6 ppm different from the area calculated from the piston-cylinder dimensions.

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