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Thermodynamik und Explosionsschutz (ThEx)

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PTB-ThEx-12

Dimensional measurements and calculation of the effective area : phase A1 of the CCM key comparison in the pressure range 0,05 to 1 MPa (gas medium, gauge mode)

Autor(en):
Herausgeber: Physikalisch-Technische Bundesanstalt
Report Typ: PTB-Report
Jahr: 2000
Seite(n): 35, 7 S.
ISBN: ISBN 3-89701-614-1 ; ISSN 1434-2391
Zusammenfassung: This report summarises the results obtained by five laboratories in the determination of the effective areas of two piston-cylinder asemblies from dimensional measurements carried out as part of a key comparison in the pressure range 0,05 MPa to 1 MPA under the auspices of the CCM. It analyses the results of the dimensional measurements performed by the laboratories as well as the methods they used to calculate the effective area from the dimensional data. Twenty-five of the 34 values reported by the laboratories deviate from the reference values by no more than the standard uncertainties of these deviations. All the results agree with the reference values with the expanded uncertainties with a coverage factor k = 2. In three of 30 pairs of compared results, te discrepancies are larger than the expanded uncertainties with a coverage factor k = 2.
Bemerkung: Dimensional measurements and calculation of the effective area : phase A1 of the CCM key comparison in the pressure range 0,05 to 1 MPa (gas medium, gauge mode) ; (PTB-Bericht PTB-ThEx-12)

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