Patent ID: 7181982

Claim:
A coriolis mass flow meter, especially a Coriolis mass-flow/density meter, for measuring a mass flow rate of a two, or more, phase medium flowing in a pipeline, comprising: at least one measuring tube interposed in the pipeline and through which the medium flows during operation, said at least one measuring tube having an inlet end and an outlet end; a support means, which is fixed to said inlet end and to said outlet end of said at least one measuring tube, thus holding said at least one measuring tube in an oscillation-permitting manner; an exciter arrangement, which causes said at least one measuring tube to execute mechanical oscillations, especially bending oscillations, during operation; oscillation sensors for producing a first oscillation measurement signal (x s1 ) representing oscillations at said inlet end of said at least one measuring tube, and a second oscillation measurement signal (x s2 ) representing oscillations at said outlet end of said at least one measuring tube; and measuring and operating electronics, which deliver an exciter current (i exc ) driving said exciter arrangement and mass flow rate measured value (X m ), which represents the mass flow rate to be measured, wherein: said measuring and operating electronics produces a first intermediate value (X′ m ) derived from the oscillation measurement signals (x s1 , x s2 ) and corresponding to the mass flow rate to be measured, as well as producing a correction value (X K ) for the first intermediate value (X′ m ), and determines the mass flow rate measured value (X m ) on the basis of the first intermediate value (X′ m ) and the correction value (X K ); said measuring and operating electronics produces the correction value (X K ) by using at least one, second intermediate value (X 2 ), which is derived from at least one of the oscillation measurement signals (x s1 , x s2 ) and/or from the exciter current (i exc ), and which represents a measure for an amount of a phase of the medium; and said measuring and operating electronics has a table memory, in which a plurality of discrete preset values for the correction value (X K ) are digitally stored, and for determining the correction value (X K ), uses one of the preset values, which, on the basis of the second intermediate value (X 2 ), is read out of the table memory.