Measurement IRM aims to get the saturation state of the sample being tested. This measurement is done by placing a sample of the finished didemagnetisasi in center of magnetic poles, then given electromagnetic field generated by electric currents Weiss with an acceptable rate of 16 A with voltage of 120 V DC Power Supply and electrical resistance 6,6 Ohm. To obtain a strong magnetic field, of course, required large electrical currents and to keep the heat effect resulting from large currents Weiss electromagnet was then cooled with water that flowed through the cooling pipe with pompa.Kuat electromagnetic field generated by Weiss, in addition to relying the flow is also dependent on the distance of the magnetic poles. The measurement results obtained should show a linear relationship between the magnetic field with an electric current through the relationship M = ai + b where M states in the magnitude of the magnetic field coil elektomagnet Weiss, i declare a strong magnitude of the current in Amperes, while a and b is the number of measurement results obtained ie a = b = 80.26 and 12.03. IRM measurements performed by means of Minispin Magnetometers with the same procedure as in the measurement of NRM, note the magnitude of the intensity of magnetization is shown as a result of the magnetic field induced by electromagnetic Weiss, then raise the terrain is given by way of adjusting the position switch to position 2 and note the large strong currents caused. After administering field is done, then measure again IRMnya with the same procedure as before to obtain saturation of the sample being tested. Usually the number of steps required for saturation between 11-15 step or maybe less. IRMnya sample to be measured is taken one from each site by considering that the sample is slow decay of its intensity, the characterization of a95 which is quite significant and doesdeclination, inclination and not vary much with the other characterization.