With these measured values, a graph of voltage versus time will be from the start of stimulation, for each electrode and each set sequence. It will try, by analyzing the curve (v = f (t))obtain the value of the capacitance (Cp Figure 4) for each electrode for each sequence. For this model equivalent circuit proposed in Figure 4 and an analysis of successive approximations is performed, determining the value of Cp represents the most approximate curve obtained is used.