Method for operating a measuring transducer of vibration-type

A method for operating a measuring transducer of vibration-type, the method comprising:

• providing a measuring transducer including at least two oscillators, each of which is formed by a pair of measuring tubes, wherein the pairs of measuring tubes are arranged for parallel flow, wherein the at least two oscillators have mutually independent oscillator oscillations with mutually differing eigenfrequencies for corresponding oscillation modes;
• determining a first value of a primary measurement variable, or of a variable derived therefrom, using a first oscillator of the at least two oscillators;
• determining a second value of the primary measurement variable, or of a variable derived therefrom, using a second oscillator of the at least two oscillators;
• checking an actual ratio between the first value and the second value by comparison with an expected ratio between the first value and the second value;
• and
• outputting a signal when the actual ratio does not correspond to the expected ratio.