ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY ANALYZER WITH DIGITAL POTENTIOSTAT |
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| Jerzy Hoja, Grzegorz Lentka |
- Abstract:
- The paper presents a prototype of EIS analyzer, which uses digital potentiostat/galvanostat. The separate paths and AD converters were used for sampling DC and AC components of signals proportional to current through and voltage across the impedance of the measured object. The converters are controlled by different processors, which performs functions tightly connected with realization of two tasks of EIS analyzer: potentiostat/galvanostat controlling and impedance measuring. In order to decrease the influence of the real-life parameters of used operational amplifiers and the parasitic capacitances on the error of impedance measurement, the correction taking those parameters into account has been used in the algorithm for determination of impedance parameters of the measured objects. Performed tests proved benefits appearing from correction implemented in the algorithm. The measurement results of an example non-linear RC object with diode show that the relative error of impedance modulus doesn’t exceed +0.5/-1.0% and absolute error of impedance argument was not greater than ±0.5°.
- Download:
- IMEKO-TC4-2008-030.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
- Title:
- XVIth IMEKO TC4 International Symposium on Electrical Measurements and Instrumentation (together with 13th IMEKO TC4 Workshop on ADC Modelling and Testing)
- Place:
- Florence, ITALY
- Time:
- 22 September 2008 - 24 September 2008