| Zugriffsnummer | 13747 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | Maintenance and dissemination of the magnetic field unit at PTB |
| Autor(in); Institution |
Weyand, Kurt; 2.23, Magnetische Größen, PTB-Braunschweig
|
| Quelle/Jahr | IEEE Transactions on Instrumentation and Measurement: 50 (2001), 2, 470 - 473 |
| ISSN | 0018-9456 |
| Verlag | New York: IEEE |
| Konferenzangaben | Conference on Precision Electromagnetic Measurements ; CPEM 2000, Sydney, 14-19, May, 2000, Australia |
| Freie Schlagworte | magnetic field calibration ; magnetic field standard ; magnetic field unit |
| Zusammenfassung | The different methods which are used at Physikalisch Technische Bundesanstalt (PTB) to dissemeninate the unit of flux density are presented and compared with respect to their uncertainties. A dc flux density range from 10 μT to 2 T is covered with the lowest relative uncertainty of 10-6 at fields of 1 mT to 2mT. In case of ac fields, field coils are used as standards, the frequency response of which is checked by means of a simple but very reliable inductive mesuring technique. A relative uncertainty of 3 × 10-3 or even less is typically achieved for frequencies below 30 kHz. |
