A method for verifying accurate operation for a flow meter (5) is provided. The method entails receiving a vibrational response from the flow meter (5), wherein the vibrational response comprises a response to a vibration of the flow meter (5) at a substantially resonant frequency. At least one gain decay variable is measured. It is then determined whether the gain decay variable is outside a predetermined range. A filter used in a stiffness calculation is adjusted if the gain decay variable is outside the predetermined range.

Methods for operating a flowmeter diagnostic tool are provided that comprise interfacing the diagnostic tool with a flowmeter (5) sensor assembly (10). A base prover volume (BPV), a desired number of passes per run, and/or a maximum number of allowed runs may be input into the diagnostic tool. Flowmeter data is received. An estimated total prove time (TPT) necessary to pass a predetermined repeatability requirement, an estimated minimum number of runs needed to achieve the calculated TPT, and/or an estimated minimum BPV may be calculated.

A measuring system includes a measuring and operation electronic unit (ME) and a transducer device electrically coupled thereto. The transducer device (MW) has at least one tube, through which fluid flows during operation and which is caused to vibrate meanwhile, a vibration exciter, two vibration sensors for generating vibration signals, and two temperature sensors for generating temperature measurement signals (θ1, θ2). The temperature sensors are coupled to a wall of the tube in a thermally conductive manner. The ME is designed to feed electrical power into the at least one vibration exciter to cause mechanical vibrations of the tube by an electrical excitation signal. The ME generates a mass flow sequence representing the instantaneous mass flow rate (m) of the fluid, so that, at least for a reference mass flow rate, the mass flow measurement values are independent of the temperature difference.

A measuring system comprises: a measuring transducer; transmitter electronics; at least one measuring tube; and at least one oscillation exciter. The transmitter electronics delivers a driver signal for the at least one oscillation exciter, and for feeding electrical, excitation power into the at least one oscillation exciter. The driver signal, has a sinusoidal signal component which corresponds to an instantaneous eigenfrequency, and in which the at least one measuring tube can execute, or executes, eigenoscillations about a resting position. The eigenoscillations have an oscillation node and in the region of the wanted, oscillatory length exactly one oscillatory antinode. The driver signal has, a sinusoidal signal component with a signal frequency, which deviates from each instantaneous eigenfrequency of each natural mode of oscillation of the at least one measuring tube, in each case, by more than 1 Hz and/or by more than 1% of said eigenfrequency.

A measuring transducer includes a support body, a curved oscillatable measuring tube, an electrodynamic exciter, at least one sensor for registering oscillations of the measuring tube, and an operating circuit. The measuring tube has first and second bending oscillation modes, which are mirror symmetric to a measuring tube transverse plane and have first and second media density dependent eigenfrequencies f1, f3 with f3>f1. The measuring tube has a peak secant with an oscillation node in the second mirror symmetric bending oscillation mode. The operating circuit is adapted to drive the exciter conductor loop with a signal exciting the second mirror symmetric bending oscillation mode. The exciter conductor loop has an ohmic resistance R.sub.Ω and a mode dependent mutual induction reactance R.sub.g3 which depends on the position of the exciter. The exciter is so positioned that a dimensionless power factor ${\mathrm{pc}}_3=\frac{4.Math.R_{\Omega }.Math.R_{g3}}{{\left(R_{\Omega }+R_{g3}\right)}^2}$
has a value of not less than 0.2.

A method of determining a zero offset of a vibratory meter at a process condition is provided. The method includes measuring a flow rate of a material in the vibratory meter, determining if the measured flow rate is less than a low flow threshold, measuring one or more operational parameters of the vibratory meter, determining if the one or more measured operational parameters of the vibratory meter are within a corresponding range, and if the measured flow rate is less than the low flow threshold and if the one or more measured operational parameters of the vibratory meter are within the corresponding range, then determining a zero offset of the vibratory meter based on the measured flow rate.

A measuring device for measuring flow velocity includes a measuring tube, a measuring transducer for registering a measured variable and outputting a first measured value representing the measured variable, a temperature sensor, and an electronic measuring/operating circuit. The temperature sensor has a sensor element and electrically conductive leads. Each lead is connected with the sensor element and has a first section following on the connection location. The sensor element has a maximum periphery. The first section has a separation of less than 5% of a measuring tube radius from a measuring tube wall, wherein a length of each lead in the first section is at least 25% of the maximum periphery. The leads are guided in their first section at least in certain regions along the maximum periphery, and in their first section are in certain regions in thermal contact with the measuring tube.

A method for proving or calibrating a first How meter integrated into a common platform with a second flow meter is provided. The first flow meter comprises a first driver, a first flow tube, and a first meter electronics, and the second flow meter comprises a second driver, a second flow tube, and a second meter electronics. The method includes configuring the first flow meter to vibrate the first flow tube with a first driver voltage at a first default driver voltage amplitude using the first meter electronics, and configuring the second flow meter to vibrate the second flow tube with a second driver voltage at a second standby driver voltage amplitude using the second meter electronics.

Provided is a Coriolis flow sensor assembly that includes a flow tube configured to provide a flow path through the flow tube. Further, the Coriolis flow sensor assembly includes a mechanical drive assembly configured to drive an oscillation of the flow tube while fluid is flowing via an oscillation surface. The Coriolis flow sensor assembly includes an interface fixedly coupled to the oscillation surface of the mechanical drive assembly and configured to receive the flow tube.

A measuring device for determining density, mass flow rate and/or viscosity of a flowable medium includes: an oscillator including at least one oscillatable measuring tube for conveying the medium, and having at least one oscillatory mode, whose eigenfrequency depends on density of the medium; an exciter for exciting the oscillatory mode; at least one oscillation sensor for registering oscillations of the oscillator; and an operating-evaluating circuit, which is adapted to supply the exciter with an excitation signal, to register signals of the oscillation sensor, based on the signals of the oscillation sensor to ascertain current values of the eigenfrequency of the oscillator as well as variations of the eigenfrequency, and to determine a value characterizing density variations of the medium, wherein the value depends on a function, which is proportional to the variation of the eigenfrequency and has an eigenfrequency dependent normalization.