Abstract: A computer program product includes program instructions executable by a processor to perform various operations. The operations include obtaining data from a flow meter having ultrasonic transducer pairs arranged about a conduit to establish measurement paths, wherein the flow meter data includes ultrasonic pulse transmission and detection data from first and second ultrasonic transducers for each path included in a set of the paths. The operations further comprise determining a first flow rate using the data for each path in the set of the paths, determining a second flow rate using the data for each path in a subset of the paths, wherein the subset of the paths includes fewer paths than in the set of the paths and only paths included in the set of the paths, and determining whether a difference between the first flow rate and the second flow rate is greater than a difference setpoint.

Abstract: Systems or apparatus include a plurality of ultrasonic transducer pairs arranged about a conduit to establish a plurality of measurement paths directed at an acute angle relative to a central axis of the conduit. A control system is configured to perform operations comprising obtaining ultrasonic pulse transmission and detection data from the first and second ultrasonic transducers for each of the measurement paths, determining a first fluid flow rate using the data for each of the measurement paths, determining a second fluid flow rate using a subset of the data that is used to determine the first fluid flow rate, wherein the subset of the data includes only the data for a subset of the measurement paths, and determining whether a difference between the first fluid flow rate and the second fluid flow rate is greater than a difference setpoint.