| Zugriffsnummer | 44063 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Experimental evaluation of a PTB force-balanced piston gauge |
| Autor(in); Institution |
Hashad, Ahmed; 3.3, Physikalische Chemie, PTB-Braunschweig; National Institute for Standards (NIS), Giza, EGYPT
Sabuga, Wladimir; 3.3, Physikalische Chemie, PTB-Braunschweig
Ehlers, Sven; 3.3, Physikalische Chemie, PTB-Braunschweig
Bock, Thomas; 7.5, Wärme und Vakuum, PTB-Berlin
|
| Quelle/Jahr | Proceedings of the APMF2019:(2020), 1 - 6 |
| Verlag | Tokio: The Society of Instrument and Control Engineers (SICE) |
| Konferenzangaben | Asia Pacific Measurement Forum on Mechanical Quantities 2019 ; APMF 2019, Niigata, 17-21, November, 2019, Japan |
| Freie Schlagworte | FPG ; cross floating ; effective area ; pressure standard ; experimental verification |
| Zusammenfassung | Experimental methods using different pressure standards were applied to verify theoretical results obtained for the effective area of the piston-cylinder assembly (PCA) and the pressures measured with a Force-Balanced Piston Gauge (FPG). The theoretical effective area was based on PCA's dimensional properties defined by diameter, straightness and roundness measurements on the piston and cylinder, derived by gas flow modelling using principles of the Rarefied Gas Dynamics, and presented by two values, one obtained for absolute and the other for gauge pressure operation modes of the FPG, both having a relative standard uncertainty of 5x10 6. The experimental methods were selected aimed at covering the whole operating pressure range of the FPG from 3 Pa to 15 kPa. Comparisons of the FPG with three different PTB pressure standards operated in different pressure ranges were performed using the cross-float method or by a direct comparison of the generated pressures. First, a Ruska pressure balance traceable to PTB primary pressure standards was applied to determine the FPG effective area in the range of 2 kPa to 15 kPa. Second, the FPG was compared with a mercury manometer, being a primary standard, in the pressure range of 1 kPa to 15 kPa. Third, the FPG pressures from 3 Pa up to 300 Pa were compared with pressures of a static expansion system (SES), being PTB primary vacuum standard. The two first comparisons against the pressure balance and the mercury manometer were performed in absolute and gauge pressure modes. The measurements against the SES were done in absolute pressure mode only. The experimental results obtained at pressures above 1 kPa were used to calculate the PCA effective area, which was compared with the theoretical one. Below 1 kPa, the FPG pressures were compared with those of the reference standards. For the theoretical and experimental effective area as well as for pressures generated by the FPG and the reference standards, all the results demonstrated full agreement within their uncertainties. Herewith, the FPG characterised as primary pressure standard is validated experimentally and can now be used for pressure measurements and calibrations in the pressure range from about 3 Pa to 15 kPa. |
| Themenbereich der Metrologie | Masse und abgeleitete Größen |
| Forschungsprojekt | 14IND06: pres2vac: Industrial standards in the intermediate pressure-to-vacuum range |
| Förderinformationen (1) |
Förderername: European Commission (EC)
Förderer ID: 0000 0001 2242 8989 Förderer ID Typ: ISNI Förderprogramm: EMPIR 2014 Industry Titel der Förderung: 14IND06: pres2vac: Industrial standards in the intermediate pressure-to-vacuum range Förderungsnummer: 14IND06 URI der Förderung: http://pres2vac.eu |