A flow transmitter method and system involves obtaining, via a flow sensor, sensor measurements of flow characteristics of a moving medium; outputting, via a processor, a drive signal for driving a pulse output circuit to generate a pulse signal according to the sensor measurements from the sensor; and generating, via a switching circuit of a pulse output circuit, a pulse signal according to the drive signal. The method and system further involve monitoring, via a diagnostic circuit connected to the switching circuit, current corresponding to the pulse signal; and determining, via the processor, whether the output circuit is operating in a normal or abnormal state based on the drive signal from the processor and a feedback signal corresponding to the monitored current from the diagnostic circuit.

A flow transmitter method and system involves obtaining, via a flow sensor, sensor measurements of flow characteristics of a moving medium; outputting, via a processor, a drive signal for driving a pulse output circuit to generate a pulse signal according to the sensor measurements from the sensor; and generating, via a switching circuit of a pulse output circuit, a pulse signal according to the drive signal. The method and system further involve monitoring, via a diagnostic circuit connected to the switching circuit, current corresponding to the pulse signal; and determining, via the processor, whether the output circuit is operating in a normal or abnormal state based on the drive signal from the processor and a feedback signal corresponding to the monitored current from the diagnostic circuit.

Flow meter and method for measuring the flow velocity of an oil continuous multiphase flow, said flow including water droplets. The flow meter including at least one magnetic field generator configured to provide a magnetic field with a known strength into said flow, the flow meter also including at least one sensor for measuring the charge at the sensor relative to a ground level, the sensor being positioned at a distance from the center of the magnetic field axis and the flow axis, in essentially the same axial position as the magnetic field axis, wherein the meter also including a calculating means for calculating a measure of the flow velocity based on the measured charge.

A magneto-inductive flow measurement device, comprises a means for producing a magnetic field with a self-inductance, wherein the means for producing the magnetic field comprises a coil arrangement; a means for sensing a measurement voltage induced in the flowable medium; an operating circuit, which is adapted to apply an operating signal on the coil arrangement, wherein the operating signal has operating signal parameters; a measuring circuit, which is adapted to determine a coil electrical current of the coil arrangement; a control circuit, which is adapted so to control at least one of the operating signal parameters that a function dependent on a self-induction value of the self-induction and a coil electrical current value of the coil electrical current does not differ from a predetermined, first desired value.

A magneto-inductive flow measurement device, comprises a means for producing a magnetic field with a self-inductance, wherein the means for producing the magnetic field comprises a coil arrangement; a means for sensing a measurement voltage induced in the flowable medium; an operating circuit, which is adapted to apply an operating signal on the coil arrangement, wherein the operating signal has operating signal parameters; a measuring circuit, which is adapted to determine a coil electrical current of the coil arrangement; a control circuit, which is adapted so to control at least one of the operating signal parameters that a function dependent on a self-induction value of the self-induction and a coil electrical current value of the coil electrical current does not differ from a predetermined, first desired value.

A system may include a driver circuit configured to receive a clock signal. The system may also include a first tuned circuit and a second tuned circuit. The first tuned circuit and the driver circuit may be collectively tuned according to a first frequency range. The first tuned circuit may be configured to be active when a rate of the clock signal is within the first frequency range and to be inactive when the rate is outside of the first frequency range. Further, the second tuned circuit and the driver circuit may be collectively tuned according to a second frequency range that is different from the first frequency range. The second tuned circuit may be configured to be active when the rate is within the second frequency range and to be inactive when the rate is outside of the second frequency range.

This disclosure relates to a method for determining a fluid balance between a first volume flow in a first section of a fluid circuit and a second volume flow of a second section of the fluid circuit. The method may also include adjusting, assuming or detecting a first temperature in the first section of the fluid circuit and a second temperature in the second section of the fluid circuit, or detecting a temperature difference between the first and the second sections. The method may also include detecting a second volume flow in a second section of the fluid circuit and forming a balance from at least the first volume flow and a corrected value of the second volume flow. The corrected value is determined from the detected second volume flow and the second temperature and/or the temperature difference.

A detection device for a liquid-conducting appliance includes a hydraulic body (2) defining a duct (3) for a flow of a liquid, and a flow sensor on the hydraulic body (2), which includes an electromagnetic arrangement and a detection arrangement. The detection arrangement includes two electrode units (20) for detecting a potential difference induced by the flow of the liquid through an electromagnetic field generated by the electromagnetic arrangement. The hydraulic body (2) has two through openings on two opposite sides (3a, 3b) of the duct (3), inserted in each of which is a corresponding electrode unit (20), in such a way that the electrode units (20) are opposed to one another and in contact with the liquid. The device (1) includes sealing elements at each through opening, for preventing leakage of the liquid from the duct (3).

A detection device for a liquid-conducting appliance includes a hydraulic body (2) defining a duct (3) for a flow of a liquid, and a flow sensor on the hydraulic body (2), which includes an electromagnetic arrangement and a detection arrangement. The detection arrangement includes two electrode units (20) for detecting a potential difference induced by the flow of the liquid through an electromagnetic field generated by the electromagnetic arrangement. The hydraulic body (2) has two through openings on two opposite sides (3a, 3b) of the duct (3), inserted in each of which is a corresponding electrode unit (20), in such a way that the electrode units (20) are opposed to one another and in contact with the liquid. The device (1) includes sealing elements at each through opening, for preventing leakage of the liquid from the duct (3).

An oscillating analog signal includes a succession of dampened oscillations. That oscillating analog signal is conditioned to generate an output signal including only oscillations of the oscillating analog signal which have an amplitude smaller than a first threshold. The output signal is then processed by a processing unit, where the first threshold is compatible with a maximum level of voltage tolerable by the processing unit.