The material ‘manganite’ having the formula , belongs to the large family of Perovskites and have a large variation in properties like colossal magnetoresistance , ferroelectricity, magnetocaloric effect etc. when the trivalent lanthanide ion3AMnOA is replaced partially by divalent / monovalent alkaline earth ions. Early studies on manganites were motivated by a need to develop insulating ferromagnets with a large magnetization for high frequency application. The renewed interest in this material started in ~1990’s with the observation of large MR effect near Curie temperature. More recent work has been driven by a desire to understand and exploit large magnetoresistance and magnetocaloric effects near Curie temperature (). CTIn the present program, the polycrystalline bulk samples of have been prepared with Potassium concentration up to 0.15 by chemical ‘Pyrophoric method’. The characterization of the samples is done by X-ray diffraction and Rietveld analysis, scanning electron microscopy, oxygen non-stoichiometry, density and ac susceptibility measurements. A detail investigation of electrical, thermoelectric, magnetoresistance and the magnetocaloric effect on this polycrystalline compound has been carried out. A major part of the work is devoted to develop a vibrating sample magnetometer (VSM) in order to carry out the magnetization measurement needed for the study of magnetocaloric property of these materials.