Abstract: Vibratory meters (5), and methods for their use measuring a fluid are provided. Each vibratory meter includes a multichannel flow tube (300) comprising two or more fluid channels (302), a pickoff (170), a driver (180), and meter electronics (20) configured to apply a drive signal to the driver at a drive frequency, and measure a deflection of the multichannel flow tube with the pickoff. In examples, at least one fluid channel has an effective diameter that is related to kinematic viscosity, inverse Stokes number, and drive frequency; velocity of sound and drive velocity; or the length of the flow tube. In further examples, the driver may apply a drive signal to the driver having a drive frequency proportional to the kinematic viscosity, inverse Stokes number, and effective diameter; or velocity of sound and effective diameter.

Abstract: A vibratory meter (5) including a multi-channel flow tube (130) is provided. The vibratory meter (5) includes a meter electronics (20) and a meter assembly (10) communicatively coupled to the meter electronics (20). The meter assembly (10) includes the multi-channel flow tube (130, 330, 430, 530) comprising two or more fluid channels (132, 332, 432, 532) surrounded by a tube wall (134, 334, 434, 534). The two or more fluid channels (132, 332, 432, 532) and tube wall (134, 334, 434, 534) comprise a single integral structure. A driver (180) is coupled to the multi-channel flow tube (130, 330, 430, 530). The driver (180) is configured to vibrate the multi-channel flow tube (130, 330, 430, 530). The two or more fluid channels (132, 332, 432, 532) and tube wall (134, 334, 434, 534) are configured to deform in the same direction as the single integral structure in response to a drive signal applied to the driver (180).

Abstract: A first and second vibratory meter (5), and methods of manufacturing the same are provided. The first vibratory meter includes a pickoff (170l), a driver (180), and a flow tube (400) comprising a tube perimeter wall with: a first substantially planar section (406a), a second substantially planar section (406b) coupled to the first substantially planar section to form a first angle ??1#191 (404), and a first curved section (406c). The second vibratory meter includes a pickoff, a driver, and a flow tube (700) comprising a tube perimeter wall with: a first substantially planar section (706a), a second substantially planar section (706b) coupled to the first substantially planar section to form a first angle ??1#191 (704), a third substantially planar section (706c), a fourth substantially planar section (706d), and a fifth substantially planar section (706e).

Abstract: A method and apparatus for operating a flowmeter (5) is provided. A process fluid is placed in the flowmeter (5). A measured mass flow rate (221) of the process fluid is determined. The process fluid is totalized. A first flowmeter parameter is measured. The measured mass flow rate (221) is set to zero if the first flowmeter parameter differs from a pre-determined threshold by a predetermined amount, and totalizing is halted if the first flowmeter parameter differs from a predetermined threshold by a predetermined amount.

Abstract: A sensor assembly (10) of a vibrating meter (5) is provided. The sensor assembly (10) comprises one or more fluid conduits (103A, 103B). The sensor assembly (10) also includes a case (200) surrounding at least a portion of the one or more fluid conduits (103A, 103B). A synthetic wrap (300) is applied to at least a portion of the case (200).

Abstract: Vibratory meters (5), and methods for their use measuring a fluid are provided. Each vibratory meter includes a multichannel flow tube (300) comprising two or more fluid channels (302), a pickoff (170), a driver (180), and meter electronics (20) configured to apply a drive signal to the driver at a drive frequency ?, and measure a deflection of the multichannel flow tube with the pickoff. In examples, at least one fluid channel has an effective diameter that is related to velocity of sound and drive velocity. In further examples, the driver may apply a drive signal to the driver having a drive frequency proportional to the velocity of sound and effective diameter.

Abstract: A flow conduit assembly (300), a method for making the same, a brace bar (304), and a vibrating flowmeter including the flow conduit assembly are provided. The flow conduit assembly includes a first flow tube (302), a second flow tube (303), and a first brace bar (304) coupled to the first flow tube, wherein the first brace bar does not enclose the first flow tube and the second flow tube.

Abstract: A vibratory meter (5), and methods of manufacturing the same are provided. The vibratory meter includes a pickoff, a driver, and a flow tube (700) comprising a tube perimeter wall with: a first substantially planar section (706a), a second substantially planar section (706b) coupled to the first substantially planar section to form a first angle ?1 (704), a third substantially planar section (706c), a fourth substantially planar section (706d), and a fifth substantially planar section (706e).

Abstract: Vibratory meters (5), and methods for their use measuring a fluid are provided. Each vibratory meter includes a multichannel flow tube (300) comprising two or more fluid channels (302), a pickoff (170), a driver (180), and meter electronics (20) configured to apply a drive signal to the driver at a drive frequency ?, and measure a deflection of the multichannel flow tube with the pickoff. In examples, at least one fluid channel has an effective diameter that is related to kinematic viscosity, inverse Stokes number, and drive frequency. In further examples, the driver may apply a drive signal to the driver having a drive frequency proportional to the kinematic viscosity, inverse Stokes number, and effective diameter.

Abstract: A method for operating a vibratory flowmeter (5) is provided. The method includes placing a process fluid in the vibratory meter (5) and measuring entrained gas in the process fluid. A measurement confidence level is determined for at least one operating variable.

Abstract: A meter electronics (20) for a flowmeter (5) configured to receive a process fluid is provided. The meter electronics (20) includes an interface (201) configured to communicate with a flowmeter assembly of the flowmeter (5) and to receive a vibrational response. The meter electronics (20) comprises a drive gain threshold determination routine (215) configured to determine a first predetermined drive gain threshold (302), monitor a drive gain signal over a predetermined time period, and determine lowest points in the drive gain signal over the predetermined time period. A second drive gain threshold is determined based upon reaching a predetermined number of instances of low points of the drive gain signal.

Abstract: A method is provided for determining fluid momentum through one or more conduits. The method comprises the step of receiving an elongation signal from an elongation sensor indicating an elongation of the one or more conduits due to the flowing fluid. A momentum term is then calculated.

Abstract: A method for calculating a fluid parameter of a fluid flowing through a vibratory flow meter is provided. The method comprises vibrating the flow meter at one or more frequencies and receiving a vibrational response. The method further comprises generating a first fluid property and generating at least a second fluid property. The method further comprises calculating a fluid parameter based on the first fluid property and the at least second fluid property.

Abstract: A vibratory meter (5) including a multi-channel flow tube (130) is provided. The vibratory meter (5) includes a meter electronics (20) and a meter assembly (10) communicatively coupled to the meter electronics (20). The meter assembly (10) includes the multi-channel flow tube (130, 330, 430, 530) comprising two or more fluid channels (132, 332, 432, 532) surrounded by a tube wall (134, 334, 434, 534). The two or more fluid channels (132, 332, 432, 532) and tube wall (134, 334, 434, 534) comprise a single integral structure. A driver (180) is coupled to the multi-channel flow tube (130, 330, 430, 530). The driver (180) is configured to vibrate the multi-channel flow tube (130, 330, 430, 530). The two or more fluid channels (132, 332, 432, 532) and tube wall (134, 334, 434, 534) are configured to deform in the same direction as the single integral structure in response to a drive signal applied to the driver (180).

Abstract: A meter electronics (20) for a flowmeter (5) configured to receive a process fluid is provided. The meter electronics (20) includes an interface (201) configured to communicate with a flowmeter assembly of the flowmeter (5) and to receive a vibrational response. The meter electronics (20) comprises a drive gain threshold determination routine (215) configured to determine a first predetermined drive gain threshold (302), monitor a drive gain signal over a predetermined time period, and determine lowest points in the drive gain signal over the predetermined time period. A second drive gain threshold is determined based upon reaching a predetermined number of instances of low points of the drive gain signal.

Abstract: A method for operating a vibratory flowmeter (5) is provided. The method includes placing a process fluid in the vibratory meter (5) and measuring entrained gas in the process fluid. A measurement confidence level is determined for at least one operating variable.

Abstract: A meter electronics (20) for a vibrating meter (5) is provided. The vibrating meter (5) includes a sensor assembly located within a pipeline (301). The sensor assembly (10) is in fluid communication with one or more fluid switches (309). The meter electronics (20) is configured to measure one or more flow characteristics of a fluid flowing through the sensor assembly (10). The meter electronics (20) is further configured to receive a first fluid switch signal (214) indicating a fluid condition within the pipeline (301) from a first fluid switch (309) of the one or more fluid switches. The meter electronics (20) is further configured to correct the one or more flow characteristics if the fluid condition is outside a threshold value or band.

Abstract: The invention relates to meter electronics (20) for vibratory flowmeter friction compensation is provided. The meter electronics (20) includes an interface (201) configured to communicate with a flowmeter assembly (10) of a vibratory flowmeter (5) and receive a vibrational response and a processing system (203) coupled to the interface (201) and configured to measure a mass flow rate of a fluid using the vibrational response. The processing system (203) is configured to determine a fluid velocity (V) using the mass flow rate, a fluid density (p), and a cross-sectional flow area (A), determine a friction factor (f) using the fluid velocity (V) and a pressure drop (?P), and determine a compensation factor using the friction factor (f). The invention also relates to a vibratory flowmeter compensation method.

Abstract: A method is provided for determining fluid momentum through one or more conduits. The method comprises the step of receiving an elongation signal from an elongation sensor indicating an elongation of the one or more conduits due to the flowing fluid. A momentum term is then calculated.

Abstract: A method for operating a fluid flow system (300) is provided. The fluid flow system (300) includes a fluid flowing through a pipeline (301), a first pressure sensor (303) located within the pipeline (301), and a vibrating meter (5). The vibrating meter (5) includes a sensor assembly (10) in fluid communication with the first pressure sensor (303). The method includes steps of measuring a pressure of the fluid within the pipeline (301) using the first pressure sensor (303) and measuring one or more flow characteristics of the fluid using the vibrating meter (5). The method further includes a step of determining a static pressure of the fluid based on the pressure of the fluid within the pipeline (301) and the one or more flow characteristics. The method further includes a step of determining if the fluid contains at least some gas based on the static pressure of the fluid.