Patent ID: 6981424

Claim:
A flow measurement system comprising: an input module operable to receive an analog sensor signal from a sensor connected to a vibratable flowtube, the analog sensor signal related to a process fluid through the flowtube, wherein the process fluid includes a liquid medium and a gas; a signal processing system operable to determine sensor signal characteristics from a digitized version of the sensor signal, and further operable to determine drive signal characteristics for a drive signal to be applied to the flowtube such that a drive phase of the drive signal substantially matches a sensor phase of the analog sensor signal; a measurement system operable to determine a property of the process fluid, based on the sensor signal characteristics; an output module operable to output the drive signal to the flowtube to maintain an oscillation of the flowtube while the process fluid is contained therein; and a correction system that is operable to receive the property from the measurement system and determine a corrected property that takes into account an adverse effect of the gas in the determining of the property by the measurement system.