A pulsed fourier spectrometer for impedance measurements of electrochemical systems

The facility is intended for measuring the impedance of electrochemical systems by the pulse method. The impedance spectrum is calculated by applying the Fourier transform to the step response (variation in the potential due to sample polarization by a step current pulse). The facility is controlled by a computer and contains a programmable galvanizer and 8-bit parallel ADC with a buffer RAM. Measurements are performed by the two-or three-electrode method over a frequency band of 10⁻³ to 3×10⁵ Hz with samples whose tan (δ) is within 0.01–100. The measurement error is 2%.