A SYSTEM FOR DATA ACQUISITION IN ELECTROCHEMICAL EXPERIMENTS

In this article the construction of an apparatus for electrochemical i nvestigations using an IBM personal microcomputer is presented. This a pparatus can be used in a wide range of electrochemical methods, stati onary and dynamic. A special construction solution allows for applicat ion in electrochemical impedance spectroscopy measurements, particular ly using the fast Fourier transform method. The apparatus contains a p otentiostat connected with signal generators for the polarization of t he working electrode and two identical analogue-to-digital conversion channels. For data transmission between this apparatus and the microco mputer, two parallel transmission ports and a special communication in terface are used. Also, the detailed description of the construction o f the analogue-to-digital conversion channels, including a special mod ule for direct voltage compensation in the input analogue signal, is g iven, together with the final technical specification of the apparatus .