Abstract: A fill level measuring device having at least one transmitting and receiving unit, a measuring antenna with a first supply element for transmitting and receiving an electromagnetic measurement signal and at least one dielectric body for guiding and/or shaping the waves of the measurement signal, and a communication antenna. The communication antenna has at least one second supply element for wireless transmission and for receiving an electromagnetic communication signal. To provide a fill level measuring device that can be used particularly flexibly, the first supply element and the second supply element are arranged inside the dielectric body so that the dielectric body is able to guide and/or shape the measurement signal and the communication signal.

Abstract: A method is described for secure communication with a field measuring device of process measuring technology. A plurality of scopes of rights, and a plurality of public keys of a corresponding plurality of asymmetrical key pairs, are stored in the field measuring device. Each public key is assigned a scope of rights, and at least one private key of the corresponding plurality of asymmetric key pairs is stored in an external communicator. Upon establishing contact of the external communicator with the field measuring device, the external communicator identifies itself by a public-key authentication with the stored private key to the field measuring device. The field measuring device authenticates the external communicator using a suitable public key stored in the field measuring device. The field measuring device then opens an operating session in which the external communicator is granted access to the information technology content of the field measuring device.

Abstract: A method for operating a Coriolis mass flowmeter in which the interferences when calculating the medium parameters is considered by the eigenfrequency (f01) of the oscillation of the measuring tube being determined in the first and second natural modes during operation of the Coriolis mass flowmeter, and at least one medium parameter ({dot over (m)}) is calculated with the aid of the oscillation measuring variable (?t) by means of a calculation rule representing a mathematic relation between the oscillation measuring variable (?t), the medium parameter ({dot over (m)}) and the eigenfrequencies (f01, f02) of the oscillations of the measuring tube in the first natural mode and the second natural mode, and the medium parameter ({dot over (m)}) being determined taking into consideration the current determined eigenfrequencies (f01, f02) of the oscillations of the measuring tub in the first natural mode and the second natural mode as well as the oscillation measuring variable (?t).

Abstract: An electrical device includes a functional unit subdivided into a secure functional block and a non-secure functional block. The functional unit has a single transmission device for transmitting information from the secure functional block into the non-secure functional block. The functional unit has a first interface device and the first interface device is arranged in the non-secure functional block. A key is stored in the secure functional block. The secure functional block is designed to assign an identifier to a meaning using the key, to form a value pair from the identifier and a value, and to transmit the value pair via the transmission device in the non-secure functional block. The non-secure functional block is designed to transmit the value pair via the first interface.

Abstract: A device for receiving an electronics assembly having a closed housing with a housing wall, at least one electronic component, a holder and a fan with a fan housing, wherein the electronic component, the holder and the fan are arranged within the housing, and the fan is arranged in the holder. To provide a device for receiving an electronics assembly that enables an alternative cooling of the electronics assembly in a closed housing is achieved in that the fan is designed as a revolving blade fan and by the fact that the fan generates a continuous air flow for cooling the electronic unit during operation.

Abstract: A magnetic-inductive flowmeter having a measuring tube for guiding a conductive medium, having a magnetic field generator for generating a magnetic field passing through the measuring tube at least partially perpendicular to the medium flow direction, electrodes for tapping a measuring voltage induced in the medium and a conductivity measuring device for determining the conductivity of the medium. The conductivity measuring device has a measuring circuit with the electrodes, a voltage source and a measuring unit. In operation, the voltage source generates a voltage and the measuring unit measures the actual electrode voltage applied between the electrodes. The control unit sets the actual electrode voltage to a predetermined constant setpoint value and the evaluation unit determines the electrode current flowing between the electrodes and calculates the conductivity value of the medium or a variable related to the conductivity using the determined electrode current and the actual electrode voltage.

Abstract: A field measuring device includes a sensor, a measuring transducer, and interface electronics. The interface electronics include a measuring and control device, and first and second terminals for connecting an external electrical device. A current controller and a current measuring device are connected in series in a terminal current path between the first and second terminals. The interface electronics has a voltage source that can be switched on in the terminal current path and disconnected from the terminal current path, so that the voltage source can drive a current in the terminal current path in the switched-on state and in the case of a connected external electrical device. The measuring and control device actuates and reads the current controller, the current measuring device, and the voltage source such that a current signal is output or input via the first and second terminals when an external device is connected.

Abstract: Described and shown is a device for measuring the distance to an object, including at least two freely radiating transmitter units for transmitting an electromagnetic measuring signal, at least one receiver unit for receiving a reflection signal reflected on the object, and at least one evaluation unit. The at least one receiver unit forwards the received reflection signal to the at least one evaluation unit. The transmitter units and the at least one receiver unit are arranged within one measuring environment. The transmitter units and the at least one receiver unit have at least one common measuring frequency range. The operation of the transmitter units is coordinated so that the measuring signals transmitted by the transmitter units and the reflection signals resulting from the measuring signals can be differentiated from one another.

Abstract: A magnetic-inductive flowmeter and method in which a control circuit and/or evaluation circuit is designed/operated in such a manner that a measuring voltage tapped or tappable by measuring electrodes for flow measurement are evaluated only during a flow measuring time that is less than half the duration of the period of generation of the magnetic field and that the control circuit is designed/operated in such a manner that the measuring electrodes are impinged with conductivity measuring signals only during a conductivity measuring time that lies outside the flow measuring time.

Abstract: The invention relates to a guide element for an antenna for a fill level meter, wherein the guide element is composed of a dielectric material and is used for forming, guiding and emitting electromagnetic radiation. The guide element has a permittivity course that changes over the spatial expansion of the guide element for specifically forming the electromagnetic radiation, the course being implemented by a spatial distribution of the material density of the dielectric material, wherein the material density is defined as one portion of dielectric material per elementary cell of a given size. Furthermore, the invention relates to a method for producing a guide element.

Abstract: A tomography device for electric impedance tomography in a measuring volume having at least two measuring ports. The object is to provide a tomography device that allows adaptation to an application with less effort and/or a greater number of measuring ports than the prior art. The object is achieved with a tomography device in that the tomography device has at least two measuring modules, that each of the measuring modules is designed to be controllable via the respective module radio device and module control device and, in each case has a module control device, a module radio device and one of the measuring ports, and the respective measuring port can be arranged at a freely selectable position on a perimeter of the measuring volume, and that each of the module control devices is designed to carry out measurements for electrical impedance tomography using the respective measuring port.

Abstract: A magnetic-inductive flowmeter for measuring the flow of a conductive medium having a measuring tube, a magnetic field generator, a magnetic circuit device for guiding the measuring magnetic field, electrodes for detecting a flow-dependent electrical measuring voltage when the conductive medium flows through the measuring tube, and an electronic control and evaluation unit, and a method for operating the magnetic-inductive flowmeter. To make the magnetic-inductive flowmeter which smaller and cheaper, a sensor for detecting a physical disturbance variable acting on the magnetic circuit device is arranged on the magnetic circuit device, wherein the measuring magnetic field is influenced by the physical disturbance variable and wherein the control and evaluation unit is designed such that it detects and signals an exceeding or falling below of a pre-definable limit value of the physical disturbance variable and/or performs a correction of the effect of the physical disturbance variable on the flow measurement.

Abstract: A magnetic-inductive flowmeter with a measuring tube and at least one measuring electrode has at least one opening in its circumferential wall, at least a electrode head of the at least one measuring electrode being arranged in the at least one opening. At least one coil pair has first and second coils that are arranged offset to one another on the circumferential wall of the measuring tube in the axial direction of the measuring tube. The first and second coils are arranged at least partially overlapping to one another in a top view of a cross section through the measuring tube. The at least one measuring electrode is arranged in a peripheral area of the circumferential wall of the measuring tube that is located between the first and the second coil of the at last one coil pair.

Abstract: A transmitter having a transmitter housing (3), an electronics unit (4) and a display unit (5), the electronics unit (4) having a connection for a measured value sensor (6), the electronics unit (4) being connected to the display unit (5), and the transmitter housing (3) having at least one cable gland (7). To allow for a particularly simple and secure external operation, at least one connection module (9) is arranged in the at least one cable gland (7), and the at least one connection module (9) has at least one operating element (10) for communication with the display unit (5) and/or the electronics unit (4).

Abstract: A flowmeter for use in custody transfer, having a housing, at last one evaluation unit arranged in the housing and having an interface arranged in the housing for communication with an external control unit that can be written with data via the interface. Inadmissible influencing of the evaluation unit is prevented by at least two write protection sensor elements being arranged in the housing, by the outside of the housing having a receptacle for at least one write protection influencing element that sets the write protection sensor elements into a write protection state when inserted in the receptacle, and by the write protection state of the write protection sensor elements being detected by the evaluation unit. In detecting the write protection state of at least one of the write protection sensor elements by the evaluation unit, writing the evaluation unit with data via the interface is at least partially inhibited.

Abstract: A method for operating a Coriolis mass flowmeter having at least one measuring tube, at least one oscillation generator, at least two oscillation sensors, and at least one control and evaluation unit, the oscillation generator and the oscillation sensors being arranged on the measuring tube, wherein the measuring tube has a medium flowing through it, wherein the oscillation generator puts the measuring tube into a harmonic oscillation with the excitation frequency f0 and the excitation amplitude A0, wherein the first and the second oscillation sensors detect the oscillation of the measuring tube and wherein the first oscillation sensor forwards the oscillation to the control and evaluation unit as first measuring signal and wherein the second oscillation sensor forwards the oscillation to the control and evaluation unit as second measuring signal, and wherein at least one comparison measurement signal is determined from the first measuring signal and/or the second measuring signal.

Abstract: A variable area flowmeter having a float and having a display unit, the display unit includes a pointer element, the pointer element is connected directly or indirectly to the float such that the pointer element is mechanically deflected by the float during the measuring process. The variable area flowmeter that operates particularly reliably and is flexibly applicable at the same time is achieved in that the display unit comprises at least one bi-stable display which only requires an energy supply in order to modify the displayed representation and/or to restore the representation.

Abstract: A conductivity sensor having a sensor housing and a sensor element, the sensor element having at least a first electrode and a second electrode, the first electrode is impinged during operation by a current or voltage signal via a first feed line, the second electrode is impinged during operation by a current or voltage signal via a second feed line, and the first feed line and/or the second feed line is/are arranged in the sensor housing, and the conductivity sensor has a longitudinal axis. To provide a conductivity sensor which has a particularly high measuring range is achieved in that at least one fixing element is provided, the at least one fixing element being arranged inside the sensor housing and in that the first feed line and/or the second feed line is/are fixed in their position by the at least one fixing element.

Abstract: A method for operating an inductive conductivity sensor, wherein a first electric transmitter signal having a first signal frequency is generated and supplied to the transmitter coil, a first electric receiver signal is measured at the receiver coil and a first conductivity of the medium determined from the first electric receiver and first electric transmitter signals using a first calibration model. At least one further electric transmitter signal having a different signal frequency is generated and supplied to the transmitter coil, a further electric receiver signal is measured at the receiver coil and a further conductivity of the medium determined from the further electric receiver and electric transmitter signals using another calibration model, at least one conductivity difference is determined between each of the determined conductivities of the medium and when the at least one conductivity difference exceeds a threshold conductivity difference, the conductivity difference is signaled as an error.

Abstract: A method for operating a magnetic-inductive flowmeter that has at least one measuring unit for measuring the flow of a medium through a pipeline, a housing and at least one control and evaluation unit, wherein the measuring unit has at least one coil for generating a magnetic field, and wherein at least one capacitance formed in conjunction with the coil forms a resonant circuit and wherein the resonant circuit has at least one measured variable characterizing it. A particularly reliable operation of the flowmeter is achieved in that the resonant circuit is excited with an excitation frequency, that the measured variable characterizing the resonant circuit is determined, that a comparison value of the measured variable characterizing the resonant circuit for the leak-free case is stored in the control and evaluation unit and that the measured variable characterizing the resonant circuit is compared to the comparison value.