Method for operating an electromagnetic flowmeter and electomagnetic flowmeter

摘要: The invention relates to a method for operating an electromagnetic flowmeter (1) and carrying out the method. A measuring tube (2) is provided with coil arrangement (3, 4) producing magnetic field at right angles direction of flow. current flow in altered periodically, kept essentially constant one period after rise predetermined value. In this case, voltage applied and/or its derivative determined compared associated reference If or does not fall below value desired minimum time within measurement period, error message can be emitted order indicate fault. falls good time, it ensured that sufficiently stable measured values which tapped off electrodes (5, 6), if need be, are subject slight offset error. As result, more reliable result improved accuracy achieved.