Abstract: A magneto-inductive flow measuring device, including: A measuring tube, through which a medium flows essentially in a direction of a measuring tube axis; a magnet arrangement, which produces a magnetic field passing through the measuring tube and extending essentially perpendicularly to the measuring tube axis; a first measuring electrode and a second measuring electrode; wherein the measuring electrodes are positioned in the measuring tube on a connecting line, which is directed essentially perpendicularly to the measuring tube axis and to the magnetic field; and an evaluation/control unit, which ascertains, on the basis of a measurement voltage tapped on the measuring electrodes, the volume- and/or mass-flow of the medium through the measuring tube. In order to increase the measuring accuracy of the multi-parameter flow measuring device, the first measuring electrode is made of a first material and the second measuring electrode is made of a second material different from the first material.

Abstract: A magneto-inductive flow measuring device providing, in addition to flow information for a medium, also information concerning electrical conductivity of the medium. For a highly accurate determination of the electrical conductivity, the invention provides the following solution: a temperature measuring unit is provided, which makes available information concerning the temperature of the medium. On the basis of the measured temperature, a control/evaluation unit ascertains a correction value for electrical conductivity and makes available a correspondingly corrected value for the electrical conductivity.

Abstract: A method for determining the working point of a magneto-inductive flow measuring device for detecting volume- or mass-flow of a medium flowing through a pipeline or measuring tube, wherein an alternating magnetic field produced by a coil arrangement is caused to pass through the pipeline or measuring tube, wherein a sensor-specific rise time (tr) from reversal of the magnetic field up to reaching of an at least approximately constant magnetic field, as dependent on the particular magneto-inductive flow measuring device, is ascertained and stored, wherein a minimum measuring time (tM) for providing a measured value of flow at the at least approximately constant magnetic field is determined, and wherein an optimized measuring period (Topt) is determined as the sum of the sensor-specific rise time (tr) and the minimum measuring time (tM) and made available for operation of the flow measuring device.

Abstract: An installed hardware of a measuring field device includes at least one transducer reacting during operation to a chemical and/or physical, measured variable of a pourable and/or flowable medium, especially a pourable or flowable bulk good, liquid, gas or the like, as well as a microcomputer communicating during operation with the transducer. The field device is first installed by means of the transducer on, and/or in a process vessel serving for conveying and/or holding pourable and/or flowable media for forming a process measuring point. Thereafter, the microcomputer is booted and a basic software held in a memory provided within the field device for providing, at least in part, basic functionalities of the field device is activated in such a manner that the basic software is executable by means of the microcomputer so that, in the interaction of basic software and hardware installed in the field device, the basic functionalities of the field device are available.

Abstract: A method for monitoring a function of a magnetically inductive flow measuring sensor having a measuring tube and a magnetic field generator provided with at least two coils. The coils are used in the measuring mode for generating a magnetic field which penetrates the measuring tube. The method makes it possible to specifically monitor generation of the magnetic field, the coils being additionally used for function monitoring purposes. During function monitoring, at least one of the coils is used as a producer which produces a magnetic field that changes over time and penetrates at least one other coil, at least one of the other coils is used as a receiver via which a received signal induced by the magnetic field that changes over time can be derived, and functioning of the flow measuring sensor is monitored based on the received signal.

Abstract: The process measuring device comprises a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused especially by foreign particles or air bubbles in the liquid to be measured. For this purpose, an anomaly in the waveform of the measurement signal caused at least in part by an electrical, especially pulse-shaped, interfering potential is detected by determining within a stored first data set a data group which digitally represents the anomaly. To generate an interference-free data set, the data belonging to the data group are removed from the stored first data set.

Abstract: The invention relates to a magneto-inductive method for determining the flow rate of a medium flowing through a measuring tube in the direction of the measuring tube axis. In order to be able to detect a coating formation on a measuring electrode early and with a high degree of certainty, a test pulse (Up) of defined pulse length (tp) is issued to the measuring electrode; at least one signal in response to the test pulse (Up) is determined at at least two measuring points in time (t1, t2), wherein the measuring points in time (t1, t2) lie in a time window (tend-tbegin), which is so selected that no predictable disturbance signals occur on the measuring electrode in this time window (tend-tbegin).

Abstract: A flow meter includes a measuring tube for conveying a fluid to be measured and a magnetic field system, which has at least one field coil, through which an exciter current (IM) flows, at least at times, for producing a magnetic field passing through the fluid at least partly perpendicularly to a stream direction. In the method, the voltage (UH) instantaneously driving the exciter current (IM) is changed at a second point in time, t2, from the second voltage level, Udrv, to a third voltage level, Ushort, especially to a third voltage level which is constant or controlled to be constant, in order to achieve a sinking of the electrical current strength of the exciter current (IM) instantaneously flowing in the at least one field coil from the maximum current value, Im, to an electrical current end value, Iczu, especially a constant end value, predetermined for the exciter current (IM). In such case, the third voltage level, Ushort, is chosen smaller than the second voltage level, Urev.

Abstract: The invention relates to a magneto-inductive method for determining the flow rate of a medium flowing through a measuring tube in the direction of the measuring tube axis. In order to be able to detect a coating formation on a measuring electrode early and with a high degree of certainty, a test pulse (Up) of defined pulse length (tp) is issued to the measuring electrode; at least one signal in response to the test pulse (Up) is determined at at least two measuring points in time (t1, t2), wherein the measuring points in time (t1, t2) lie in a time window (tend-tbegin), which is so selected that no predictable disturbance signals occur on the measuring electrode in this time window (tend-tbegin).

Abstract: The process measuring device includes a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused especially by foreign particles or air bubbles in the liquid to be measured. For this purpose, an anomaly in the waveform of the measurement signal caused at least in part by an electrical, especially pulse-shaped, interfering potential is detected by determining within a stored first data set a data group which digitally represents the anomaly. To generate an interference-free data set, the data belonging to the data group are removed from the stored first data set.

Abstract: The invention relates to a method and to a device for system- and/or process-monitoring in connection with a measurement apparatus that determines/monitors at least one process parameter of a medium. The method and device enable statements to be made regarding the present and future functionality of a measurement apparatus, or individual components of the measurement apparatus. The temperature values (T) of the medium are ascertained directly or indirectly and a trend analysis regarding the thermal loading of the measurement apparatus or the thermal loading of individual components of the measurement apparatus is carried out on the basis of the ascertained temperature values (T) of the medium or on the basis of the derivatives of the ascertained temperature values of the medium.

Abstract: A flow meter includes a measuring tube for conveying a fluid to be measured and a magnetic field system, which has at least one field coil, through which an exciter current (IM) flows, at least at times, for producing a magnetic field passing through the fluid at least partly perpendicularly to a stream direction. In the method, the voltage (UH) instantaneously driving the exciter current (IM) is changed at a second point in time, t2, from the second voltage level, Udrv, to a third voltage level, Ushort, especially to a third voltage level which is constant or controlled to be constant, in order to achieve a sinking of the electrical current strength of the exciter current (IM) instantaneously flowing in the at least one field coil from the maximum current value, Im, to an electrical current end value, Iczu, especially a constant end value, predetermined for the exciter current (IM) In such case, the third voltage level, Ushort, is chosen smaller than the second voltage level, Urev.

Abstract: The process measuring device comprises a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused especially by foreign particles or air bubbles in the liquid to be measured. For this purpose, an anomaly in the waveform of the measurement signal caused at least in part by an electrical, especially pulse-shaped, interfering potential is detected by determining within a stored first data set a data group which digitally represents the anomaly. To generate an interference-free data set, the data belonging to the data group are removed from the stored first data set.

Abstract: The invention relates to a method and to a device for system and process supervision in a magneto-inductive sensor. A medium flows through a measuring tube substantially in the direction of the axis of the measuring tube. A magnetic field extends through the measuring tube in a direction substantially perpendicular to the axis of the measuring tube. A measuring voltage is induced in at least one measuring electrode that is disposed substantially perpendicular to the axis of the measuring tube. The measuring voltage or the measurement data provide information on the volume flow of the measuring medium in the measuring tube. In addition to the determination of the volume flow, the detection of the modification of a system and/or process parameter is also desired. For this purpose, the measurement data are acquired digitized and stored as actual measurement data over a predetermined period and the actual measurement data are compared with predetermined desired measurement data.

Abstract: The process measuring device comprises a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused especially by foreign particles or air bubbles in the liquid to be measured. For this purpose, an anomaly in the waveform of the measurement signal caused at least in part by an electrical, especially pulse-shaped, interfering potential is detected by determining within a stored first data set a data group which digitally represents the anomaly. To generate an interference-free data set, the data belonging to the data group are removed from the stored first data set.

Abstract: The flowmeter comprises a flow sensor with a flow tube, two coils, and two measuring electrodes as well as measuring and control electronics. The method serves to compensate interfering potentials that are caused by inductive and/or capacitive interference arising from the coil leads and/or by particles of foreign matter or air bubbles in the liquid to be measured and/or by coatings on the measuring electrodes. During first subcycles of the excitation current, a measurement signal proportional to volumetric flow rate is computed as usual. During second subcycles of the excitation current, at least one voltage pulse is applied to at least one of the measuring electrodes.

Abstract: The invention relates to a method and to a device for system- and/or process-monitoring in connection with a measurement apparatus that determines/monitors at least one process parameter of a medium (12).

Abstract: The invention relates to a method and to a device (1) for system and process supervision in a magneto-inductive sensor. A medium (6) flows through a measuring tube (2) substantially in the direction of the axis (5) of the measuring tube. A magnetic field extends through the measuring tube (2) in a direction substantially perpendicular to the axis (5) of the measuring tube. A measuring voltage is induced in at least one measuring electrode (3; 4) that is disposed substantially perpendicular to the axis (5) of the measuring tube. Said measuring voltage or the measurement data provide information on the volume flow of the measuring medium (6) in the measuring tube (2). The aim of the invention is to provide a method and a device which allow, in addition to the determination of the volume flow, the detection of the modification of a system and/or process parameter.

Abstract: The flowmeter comprises a flow sensor with a flow tube, two electrodes, and two field coils traversed by a first excitation current and a second excitation current, respectively, as well as control and evaluation electronics. The method serves to generate an error signal when the uniform turbulence in the liquid to be measured is disturbed. There are four quarter cycles. During each quarter cycle, a voltage is derived from the electrodes, and from these voltages, a first and a second voltage difference and a quotient using the first and the second voltage differences are formed. The latter is determined during calibration under uniformly turbulent flow conditions, and stored. In operation, values of the quotient are continuously formed and compared with the stored quotient; in case of deviations, an alarm is triggered and/or the volumetric flow rate signal represented by the first voltage difference is corrected.

Abstract: The invention relates to an apparatus for measuring the flow of a medium (11) to be measured which flows through a measuring tube (2) in the direction of the measuring tube axis (3), having a magnetic arrangement which generates a magnetic field which permeates the measuring tube (2) and runs essentially transversely with respect to the measuring tube axis (3), having at least one measuring electrode (4; 5) which is arranged in a lateral region of the measuring tube (2) and is coupled electrically or capacitively to the medium (11) to be measured, and having an evaluation/control unit (8) which, using the measurement voltage induced in the measuring electrode (4; 5), yields information about the volumetric flow of the medium (11) to be measured in the measuring tube (2).