Patent ID: 7260977

Claim:
A method for diagnosing a functionality of an electromechanical oscillation unit of a vibrating level gauge, comprising the steps of: supplying at least one electromechanical transducer of the electromechanical oscillation unit with an electric wave signal, a frequency of which is beyond a resonance frequency range of the electromechanical oscillation unit and is not adapted to cause resonance of an oscillatory portion of the electromechanical oscillation unit so that the electric wave signal is converted into mechanical oscillations; recording the converted mechanical oscillations using the at least one electromechanical transducer of the electromechanical oscillation unit, which reconverts the mechanical oscillations into the electric wave signal; analyzing transmission characteristics of the electromechanical transducer by comparing at least one of signal characteristics of the reconverted electric wave signal with predetermined signal characteristics; and adjusting a status information subject to an analysis of the transmission characteristics.