Flowmeter phase fraction and concentration measurement adjustment method and apparatus

A vibratory meter (5), comprising:

• a driver (104);
• a vibratory member (103, 103′) vibratable by the driver (104);
• at least one pickoff sensor (105, 105′) configured to detect vibrations of the vibratory member (103, 103′);
• meter electronics (20) comprising an interface (301) configured to receive a vibrational response from the at least one pickoff sensor (105, 105′), and a processing system (303) coupled to the interface (301) configured to:
• measure a drive gain (306) of the driver (104);
• measure a total density (325) of a multiphase process fluid in the vibratory meter (5);
• determine whether the drive gain (306) is below a first threshold;
• determine a liquid/liquid phase concentration allocation with the measured total density (325) if the drive gain (306) is below the first threshold, and calculate a flow rate for each liquid phase;
• determine at least one of whether the drive gain (306) is above a second threshold that is greater than the first threshold and whether the drive gain (306) is above a first drive gain noise threshold;
• and determine a gas/liquid phase concentration allocation with the measured total density (325) and a previously determined liquid density, if the measured total density (325) is lower than a liquid density range, and calculate a flow rate for each fluid phase.