| Zugriffsnummer | 17515 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | New multifrequency method for the determination of the dissipation factor of capacitors and of the time constant of resistors |
| Autor(in); Institution |
Ramm, Günther; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
Moser, Harald; 2.1, Gleichstrom und Niederfrequenz, PTB-Braunschweig
|
| Quelle/Jahr | IEEE Transactions on Instrumentation and Measurement: 54 (2005), 2, 521 - 524 |
| ISSN | 0018-9456 |
| Verlag | Piscataway, NJ: IEEE |
| Konferenzangaben | CPEM 2004, London, 27, June - 02, July, 2004, UK |
| Freie Schlagworte | AC resistor ; capacitor ; discrete Fourier transform ; dissipation factor ; multifrequency method ; synchronous sampling procedure ; time constant |
| Zusammenfassung | A new method for the simultaneous determination of the dissipation factor of capacitors and of the time constant of resistors by a multifrequency method is presented. This method is based on the measurement of impedance ratios at two or more frequencies. A bridge is set up with a programmable two-channel ac voltage source and the impedances to be compared. The impedance ratios are determined by synchronous sampling procedures and application of discrete Fourier transform. In a first experiment, a high-grade gas-filled 1 nF standard capacitor was compared with a stable 1 MΩ ac resistor at frequencies between 31 Hz and 666 Hz. The estimated standard uncertainties (k = 1) are 0.6·10-6 for the dissipation factor of the capacitor and 0.4 ns for the time constant of the ac resistor. |
