Patent ID: 7036355

Claim:
A viscometer for a fluid flowing in a pipe, said viscometer comprising: a vibratory transducer, with at least one flow tube for conducting the fluid and for generating friction forces acting in the fluid, said at least one flow tube communicating with the pipe and vibrating in operation, and with an excitation assembly for vibrating said at least one flow tube; and meter electronics which deliver an excitation current (I exc. ) for said excitation assembly, and a viscosity value (X η ) representing the instantaneous viscosity of the fluid, said meter electronics generating a first internal intermediate value (X 1 ), corresponding with the excitation current (i exc. ) and representing the friction forces acting in the fluid, and a second internal intermediate value (X 2 ), representing in homogeneities in the fluid, said meter electronics determining the viscosity value using the first and second internal values (X 1 , X 2 ).