Abstract: The present disclosure relates to a magnetic-inductive flow meter having a measuring tube on which there is fitted a magnetic unit for generating a magnetic field, which is aligned substantially perpendicular to a flow direction of an electrically conductive measuring medium flowing through the measuring tube and whose measurement voltage induced in the measuring medium can be detected by at least two inserted measuring electrodes electrically insulated from the measuring tube. In order to avoid coupling interference voltages into the electrical electrodes, the first and the second electrode leads can be jointly twisted starting from the leadthrough as far as the first electrode, where the first electrode lead is electrically connected to the first electrode, and the second electrode is connected to a short-circuited conductor loop which encompasses the measuring tube and is connected to the second electrode lead at a location of the first electrode.

Abstract: The present disclosure relates to a magnetic-inductive flow meter having a measuring tube on which there is fitted a magnetic unit for generating a magnetic field, which is aligned substantially perpendicular to a flow direction of an electrically conductive measuring medium flowing through the measuring tube and whose measurement voltage induced in the measuring medium can be detected by at least two inserted measuring electrodes electrically insulated from the measuring tube. In order to avoid coupling interference voltages into the electrical electrodes, the first and the second electrode leads can be jointly twisted starting from the leadthrough as far as the first electrode, where the first electrode lead is electrically connected to the first electrode, and the second electrode is connected to a short-circuited conductor loop which encompasses the measuring tube and is connected to the second electrode lead at a location of the first electrode.

Abstract: The invention relates to a method for regulating and monitoring a measuring system, in particular a flow measuring device, and the flow measuring device itself according to the preamble of patent claims 1 and 3. In order to be able to determine operability trends, according to the invention at cyclic time intervals besides measuring the terminal voltage Uk and the terminal current Ik, in addition the ohmic impedance, the inductance, the value of the reference resistor and the magnetization current are measured at cyclically recurring intervals, compared with reference values from a previous calibration measurement and stored.