A meter electronics (20) and a method for detecting and identifying a change in a vibratory meter (5) is provided. The meter electronics (20) includes an interface (201) configured to receive sensor signals (100) from a meter assembly (10) and provide information based on the sensor signals (100) and a processing system (202) communicatively coupled to the interface (201). The processing system (202) is configured to use the information to determine a first stiffness change (244) associated with a first location of a conduit (130, 130′) of the vibratory meter (5), determine a second stiffness change (254) associated with a second location of the conduit (130, 130′) of the vibratory meter (5), and determine a condition of the conduit (130, 130′) based on the first stiffness change and the second stiffness change.

A method for operating a Coriolis measurement device comprises the following steps: recording the measured voltages of sensors for sensing measuring tube vibrations and creating an asymmetric sequence of values by way of the amplitudes of the measured voltages for the purpose of diagnosing the Coriolis measurement device, recording at least one stabilization variable and creating a stabilized asymmetric sequence of values based on the stabilization variable, wherein the stabilization variable is one of the following variables or a first or further temporal derivative thereof: a resonant frequency of the measuring tube containing medium or a variable derived therefrom, time or phase difference between measurement signals from the first sensor and the second sensor or a variable derived therefrom, temperature of the measuring tube wall, temperature difference between two measurement points of the measuring tube wall.

A U-shaped tube is used to measure the mass flow rate of the fluid using both thermal method and the Coriolis principle simultaneously. Two resistant coils are wound on the tube to do the thermal measurement and an excitation coil and two optical sensors are used to do the Coriolis flow measurement. It takes the advantages of both technologies and create a flow sensor which is super accurate, gas type insensitive, long-term stable and fast responsive without too much pressure drop.

The Coriolis mass flowmeter comprises a measuring transducer having a vibration element, an exciter arrangement, and a sensor arrangement The flowmeter further includes an electronic transmitter circuit coupled with the exciter arrangement and the sensor arrangement. The transmitter circuit supplies power to the exciter arrangement to force mechanical oscillations having a wanted frequency. The sensor arrangement includes two electrodynamic oscillation sensors to convert oscillatory movements of the vibration element into an electrical signal having an alternating voltage having an amplitude dependent on the wanted frequency and on a magnetic flux of its oscillation sensor. The sensor arrangement includes a magnetic field detector adapted to convert changes of the magnetic field into a magnetic field signal having an amplitude dependent on a magnetic flux and/or an areal density of the magnetic flux. The transmitter circuit ascertains mass flow measured values and ascertains whether an external magnetic field is present.

A method for analyzing the reliability of a measured volumetric flow rate of a fluid in a gas outlet line of a gas-liquid separator is provided. In one embodiment, analyzing the reliability of the measured volumetric flow rate includes measuring a gas volume fraction of the fluid in the gas outlet line, comparing the measured gas volume fraction of the fluid to a threshold gas volume fraction level, and determining whether the measured volumetric flow rate of the fluid is reliable based on the comparison. Additional systems, devices, and methods are also disclosed.

A method for operating an engine system 200 comprising an engine 208 configured to consume a fuel, having at least a two flowmeters 214, 216, is provided. The method includes the step of operating an engine 208 disposed between a supply flowmeter 214 of the at least two flowmeters and a return flowmeter 216 of the at least two flowmeters. A first fuel density in the supply flowmeter 214 and a second fuel density in the return flowmeter 216 are measured. The fuel density measurements 317 between the supply flowmeter 214 and return flowmeter 216 are compared and a differential density measurement value, Δρ 319, based on a difference in the second fuel density and the first fuel density is determined. The Δρ 319 is compared to a range of theoretical differential fuel density values, Δρ.sub.t, and potential fuel contamination is indicated if the Δρ lies outside a range of Δρ.sub.t values by a predetermined threshold.

A method for operating a Coriolis mass flowmeter that has at least one measuring tube with medium flowing through it involves exciting the measuring tube excited to oscillation, detecting the oscillations of the measuring tube and determining the density of the medium. Detection of the state and a change in the state of a Coriolis mass flowmeter is achieved by determining a calibration temperature and a calibration density sensitivity of the Coriolis mass flowmeter using the detected oscillations, at a temperature differing from the calibration temperature, and a density sensitivity of the flowmeter determined using the detected oscillations. A measurement rate of change of the density sensitivity is determined and a forecast rate of change of the density sensitivity is calculated using a forecast algorithm, and at a given deviation of the measurement rate of change from the forecast rate of change r.sub.p, a deviation signal is generated.

A meter electronics (20) configured to notify of an event and apportion process data is provided. The meter electronics (20) comprises a memory (230) configured to continuously store the process data (410) for a duration (412), a processor (210) communicatively coupled to the memory (230). The processor (210) is configured to detect one or more events (430) in the process data (410) and at least one of generate a notification (460) and apportion the process data (410) based on the detected one or more events (430).

A method produces a void fraction (VF) error curve which correlates an apparent VF with the actual VF of a multi-phase flow, the method comprising (a) using a device to measure a property of the multi-phase flow from which an apparent VF may be calculated; (b) calculating the apparent VF using the measured property from the device; (c) determining the actual VF of the multiphase flow using a radiometric densitometer; (d) using the values from steps (b) and (c) to calculate the VF error; (e) repeating steps (b) through (d) for all expected flow conditions to generate a VF error curve.

A system can include a flow measurement device positionable in a flow path for measuring a property of the fuel flowing through the flow path and a shutdown device positionable in the flow path for controlling the fuel flow through the flow path. The system can also include a computing device that is communicatively coupled to the flow measurement device for receiving the fuel flow property and from which the presence of two-phase flow or multiphase flow can be detected. The computing device is also communicatively coupled to the shutdown device for controlling fuel flow through the flow path in response to the detection of two-phase flow or multiphase flow.