METHOD OF OPERATING A MAGNETIC-INDUCTIVE FLOW METER AND MAGNETIC-INDUCTIVE FLOW METER

摘要

Described and illustrated is a method (1) for operating a magnetic-inductive flowmeter (2), wherein the magnetic-inductive flowmeter (2) at least one measuring unit (3) for measuring the flow of a medium through a pipe (4), a housing (8) and at least one control and evaluation unit (5), wherein the measuring unit (3) has at least one coil (6, 7) for generating a magnetic field, wherein at least one of the coil (6, 7) related capacity (9, 16) is present, wherein the inductance of the coil (6, 7) with the capacitance (9, 16) forms a resonant circuit (10, 17) and wherein the resonant circuit (10, 17) has at least one measured variable characterizing it. The object to provide a method for operating a magneto-inductive flowmeter, which ensures a particularly reliable operation of the flowmeter, is achieved in that the resonant circuit (10, 17) is excited with an excitation frequency f that the resonant circuit (10, 17) Characterizing measurement is determined that in the control and evaluation unit (5) a comparison value of the resonant circuit (10, 17) characterizing measure for the leak-free case is deposited and that the resonant circuit (10, 17) characterizing the measured variable is compared with the comparison value ,