The present invention relates to a novel manner of measuring DC fields using amulti-channel MEG or MKG measuring instrument； and on the other hand, to amanner of eliminating from the measurement result the interference signalscaused by the DC currents. The invention combines the monitoring system of atestee~s movement and the method for motion correction of the measured signalsso that the signals produced by the DC currents of a moving testee are visiblein the final measurement result as a static signal component in a conventionalMEG or MKG measurement. In that case, in the measurement, it is not necessaryto beforehand prepare oneself for measuring the DC fields.
