On the application of special self-calibration algorithm to improve impedance measurement by standard measuring systems

In this paper self-calibration measuring methods are introduced to improve the accuracy of impedance measuring systems composed of standard instruments. Reference resistors are used for the self-calibration of measuring systems. The random errors are reduced by data processing using averaging and smoothing. The systematic errors are self-corrected by special self-calibration algorithms. These methods are applied to the impedance measurements of electrical elements and systems and the characterization of dielectric materials under high field intensities. Analysis and measurement results show an accuracy improvement compared with the measuring systems without self-calibration. Using the self-calibration methods precise impedance measurements are realizable in the measuring systems of lower accuracy and lower product cost.