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Pollack Periodica
Zoltan Vizvari
Tibor Kiss
Csaba Ver
Kalman Mathe
Bojan Kuljic
Ferenc Henezi
, and
Peter Odry


The presented multichannel measuring system working on various frequencies is suitable either for electrical impedance spectroscopy or tomography. The authors of this paper have developed the complete measurement system and a graphical user interface platform. The accuracy of impedance amplitude and phase are 1 ppm and 0.01°, respectively. The basic instrument works with 8 channels and can be expanded to 64 channels with the application of multiplexing or multiple parallel connected instruments in the same system.

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