Impedance measurement by means of a high-stability multiphase DDS generator, with the three-voltage method

The system the intercomparison of unlike impedances of IEN, based on the three-voltmeter method and four-terminal pair definition of the standards, has now been provided with a new direct-digital synthesis generator, having multiple outputs, isolation among the channels, and high amplitude and frequency stability. Experimental results in the new and old configuration are shown and compared.

[1]  Harald Moser,et al.  From the calculable AC resistor to capacitor dissipation factor determination on the basis of time constants , 2001, IEEE Trans. Instrum. Meas..

[2]  G. H. Rayner,et al.  Coaxial Ac Bridges , 1984 .

[3]  B. C. Waltrip,et al.  Digital impedance bridge , 1995 .

[4]  Luca Callegaro,et al.  Automatic compensation technique for alternating current metrology based on synchronous filtering , 1998 .

[5]  Wolfgang Helbach,et al.  Impedance measuring methods based on multiple digital generators , 1987, IEEE Transactions on Instrumentation and Measurement.

[6]  Louis A. Marzetta,et al.  An Evaluation of the Three-Voltmeter Method for AC Power Measurement , 1972 .

[7]  Luca Callegaro,et al.  Automated system for inductance realization traceable to AC resistance with a three-voltmeter method , 2001, IEEE Trans. Instrum. Meas..

[8]  Luca Callegaro,et al.  A synchronized two-phase sinewave generator for AC metrology system compensations , 2000, IEEE Trans. Instrum. Meas..

[9]  Gian Carlo Bosco,et al.  LC Comparison System Based on a Two-Phase Generator , 1985, IEEE Transactions on Instrumentation and Measurement.

[10]  L. Callegaro,et al.  A synchronized two-phase sinewave generator for AC metrology systems compensations , 1999, IMTC/99. Proceedings of the 16th IEEE Instrumentation and Measurement Technology Conference (Cat. No.99CH36309).

[11]  Gianluca Galzerano,et al.  A multiphase direct-digital-synthesis sinewave generator for high-accuracy impedance comparison , 2000, Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066].