Magnetic after effect measurement constitutes an advantageous procedure for the investigation of point defects giving considerable information about the crystal lattice dynamics. Unfortunately, most standard measuring methods involve tedious impedance bridges which are not suitable for systematic research. Thus a new automatic measuring system, based on the use of an inductance-capacitance resistor LCR meter, has been developed with special emphasis on soft magnetic materials. The resolution capability of our system is pointed out by measuring the disaccommodation of a ferrite sample.