ELECTROCHEMISTRY AND SI1287 Electrochemical measurements rely on the electrical aspect of chemical processes to provide readable data. This is based on Faraday’s law which relates the change in mass per unit area of a substance, to the magnitude of the current flowing through it. Measurements are made of the voltage and current acting in an electrochemical "cell", whose basic form is a pair of metal electrodes immersed in an electrolyte. The wide range of studies to which electrochemical measurements can be usefully applied includes: corrosion, effectiveness of protective coatings, batteries, and biological processes. For these measurements the SI1287 Electrochemical Interface can provide accurate d.c. polarization to establish the rate of ionization in the cell and frequency response analysis to study the cell impedance characteristics. The full spectrum of electrochemical measurement techniques can thus be employed to establish or study the mechanisms of various electrochemical phenomena. 2 FEATURES OF THE SI1287 The SI1287 Advanced Electrochemical Interface is an exceptional adaptable instrument. It can stand alone, or form the center of a powerful measurement system. The SI1287 can be used either as a potentiostat or galvanostat, with selectable control loop bandwidth to ensure stable operation for various types of cell. Full compensation and correction facilities are provided to enable you to extract the most useful information from your experimental data, with the utmost precision. Control of the SI1287 is managed manually from the front panel keyboard, or by simple commands that are applied from a controller, such as a personal computer, via the GPIB. Data from the SI1287 may be output in the form most suitable for your analysis requirements. ASCII and binary coded data is available, as well as ASCII coded status messages.