FIELD: earth magnetic field examining. SUBSTANCE: magnetic field variation station is made on base of ferroprobe transducer which has balancing winding for out of metering part of earth magnetic field compensation. Station has electronic device, stepwise balancing block and recorder. Stepwise balancing block has reversing counter, digit-to-analog converter, reference voltage source, comparator, precision amplifier, standard resistance matrix, controlling element, direct current amplifier and control block. Precision amplifier drives controlling element which is connected in series with reference voltage source and balancing winding of ferroprobe to eliminate compensation current drift caused by ambient medium temperature variations. EFFECT: better operating of earth magnetic field variations metering station. 4 cl, 1 dwg
