| Zugriffsnummer | 26391 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | High-precision capacitance bridge for dielectric-constant gas thermometry |
| Autor(in); Institution |
Fellmuth, Bernd; 7.4, Temperatur, PTB-Berlin
Bothe, Harald; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
Haft, Norbert; 7.4, Temperatur, PTB-Berlin
Melcher, Jürgen; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
|
| Quelle/Jahr | IEEE Transactions on Instrumentation and Measurement: 60 (2011), 7, 2512 - 2516 |
| ISSN | 0018-9456 |
| DOI | |
| Verlag | New York, NY: IEEE |
| Konferenzangaben | 2010 Conference on Precision Electromagnetic Measurements, CPEM 2010, Daejeon, 13-18, June, 2010, South Korea |
| Freie Schlagworte | Capacitance measurement ; fundamental constant ; measurement units ; temperature measurement |
| Zusammenfassung | A high-resolution and high-precision autotransformer ratio capacitance bridge is described that has been built and tested at the Physikalisch-Technische Bundesanstalt for dielectric-constant gas thermometry. Its main component is a homemade high-precision 1 : 1 inductive voltage divider used in a autotransformer configuration. For balancing the bridge, adjustable in-phase and quadrature currents can be injected. A detailed uncertainty budget is presented for measuring small capacitance changes. Considering correlations between main terms in themathematicalmodel, it is shown that it is possible tomeasure capacitance changes of at most a few 0.1 % with a relative standard uncertainty below one part per million, i.e., with an uncertainty relative to the capacitance value of order one part per billion. |
