Patent ID: 7162915
Filing Date: 2007-01-16
Classification: G01F,G01N

Abstract:
1. A method for operating a metering device, the metering device comprising a vibratory transducer and a meter electronics electrically connected to said transducer, said transducer including at least one flow tube communicating with a pipe for conducting a fluid flowing in said pipe, and an excitation assembly mechanically coupled to the at least one flow tube, and said meter electronics including a driver circuit electrically connected to said excitation assembly, said method comprising the steps of: generating an oscillating excitation current by means of said driver circuit and feeding said excitation current into the excitation assembly; vibrating said at least one flow tube conducting said fluid and sensing vibrations of said at least one flow tube for generating at least one sensor signal representing vibrations of said flow tube; using said at least one sensor signal for controlling said driver circuit; generating digital first intermediates values, each of said digital first intermediates values corresponding with an amplitude of said oscillating excitation current; storing said digital first intermediate values in a data memory of said meter electronics to produce a sampling of digital first intermediate values; and determining from said sampling of digital first intermediate values a second internal intermediate value representing inhomogeneities in the fluid.