| Zugriffsnummer | 10690 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | New multi-frequency 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 | 2004 Conference on Precision Electromagnetic Measurements Digest:(2004), 93 - 94 |
| ISBN | 0-7803-8493-8 |
| Berichtsnummer | 04CH37570 |
| Verlag | Piscataway, NJ: IEEE |
| Konferenzangaben | Conference on Precision Electromagnetic Measurement (CPEM), London, 27, June - 02, July, 2004, UK |
| Freie Schlagworte | multy-frequency method ; dissipation factor of capacitors ; time constant of the ac resistor |
| Zusammenfassung | A new method for the simultaneous determination of the dissipation factor of capacitors and of the time constant of resistors by a multi-frequency 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 40 Hz and 660 Hz. The estimated standard uncertainties (k = 1) are 0.7 × 10-6 for the dissipation factor of the capacitor and 0.6 ns for the time constant of the ac resistor. |
