Characterization and calibration of electromagnets is a very important issue if the objective is to develop any further application with the equipment. In this work it is informed and theoretically justify the automatic characterization and calibration of a Phylatex electromagnet. Besides, the experimental curves produced by a magnetic field as function of the feeder current in the windinos are also provided, resulting in an expected behaviour according to the theory of ferromagnetic materials. Finally an alternative procedure for the characterization of materials is presented.