Abstract: A method for operating a field device, and a field device that is operated according to the method, in which a measured value is generated, the measured value being assigned a current set point, a target current signal being issued depending on the current set point, wherein an actual current signal is fed back and the target current signal is compared to the actual current signal. To provide more exact comparison of signals a cross-correlation of the target current signal with the actual current signal is formed for comparison.

Abstract: An electrical function group with a control device and a first voltage regulator, the control device having a supply voltage input, the first voltage regulator having a first supply voltage input and a first supply voltage output and being designed for connection to a supply voltage source via the first supply voltage input and to supply the control device via the first supply voltage output, the first supply voltage output and the supply voltage input being connected together. A second voltage regulator is also provided having a second supply voltage input and a second supply voltage output, the second voltage regulator being designed to be connected to the supply voltage source via the second supply voltage input and to supply the first voltage regulator and the control device via the second supply voltage output, the second supply voltage output and the first supply voltage input being connected to one another.

Abstract: A device for determining the fill level of a medium in a container has at least one electronic device and at least one signal conductor arrangement. The electronic device supplies the signal conductor arrangement with electromagnetic signals. To provide a device for determining the fill level that is advantageous compared to the prior art, the signal conductor arrangement has several emitting devices for emitting the electromagnetic signal. A support element that can be inserted in a wall of the container supports the signal conductor arrangement.

Abstract: A method for operating a Coriolis mass flowmeter having at least one measuring tube, at least one oscillation generator, at least one oscillation sensor and at least one strain sensor. The oscillation generator is actuated with an oscillation excitation signal and the measuring tube is excited to oscillation by the oscillation generator, the oscillation of the measuring tube is detected by the oscillation sensor and an oscillation sensor signal is generated. The strain sensor is mechanically coupled to the measuring tube via a connection. A change of the mechanical coupling via the connection can be determined by the oscillation of the measuring tube being measured by the strain sensor and a strain sensor signal generated representing oscillation of the measuring tube, a correlation between the strain sensor signal and an oscillation signal representing the oscillation of the measuring tube is identified, and a temporal change of the correlation is determined.

Abstract: A method for connecting a field device (1) to an operating unit (2), and a field device (1) for use therewith, via which a connection between a field device and an operating unit can be implemented when the field device is mounted at a location that is difficult to access is achieved in that a query signal is transmitted to the field device (1) by the operating unit (2) and that a response signal is generated by the field device (1) as a reaction to the query signal, in that the field device (1) generates a blinking display and/or a change in color of the display and/or an acoustic signal and/or a change in an acoustic signal.

Abstract: A method for operating a Coriolis mass flowmeter (1) having at least one measuring tube (2) and at least one sensor (3), wherein the sensor (3) emits an electric sensor signal depending on the temperature of the sensor (3), the sensor (3) is mechanically coupled to the rest of the Coriolis mass flowmeter (1) via a connection (5) and the connection (5) has a thermal resistance. To provide a method for operating a Coriolis mass flowmeter that makes recognition of a change in the connection possible an electric excitation signal is generated, the excitation signal is impressed in the sensor (3), the sensor signal influenced by the excitation signal is detected, a change between the detected sensor signal and a reference signal is determined and the change between the detected sensor signal and the reference signal is associated with a change in the thermal resistance.

Abstract: A method for operating an inductive conductivity measuring device that has a transmitting coil with an input and a receiving coil, the transmitting coil and the receiving coil being inductively coupled to one another by an electrically conductive medium. An electrical preset alternating signal is generated and fed to the input of the transmitting coil. The method for operating an inductive conductivity measuring device is improved in that a frequency of a preset alternating signal is varied in a frequency interval, in the frequency interval, a frequency-dependent minimum input impedance at the input of the transmitting coil is determined using a response alternating signal, a minimum frequency of the response alternating signal is determined at the minimum input impedance at the input of the transmitting coil, and a conductivity of the medium is determined using the minimum frequency of the response alternating signal.

Abstract: A method for setting a constant magnetic field strength of a magnetic field within a commutation interval using a magnetic-inductive flowmeter having a current controller with which time for setting the constant magnetic field strength of a magnetic field is relatively shorter. Additionally, a first interval having a starting point in time and an ending point in time and a second interval having a starting point in time and an ending point in time are arranged within a commutation interval. A first setpoint current curve for the first interval differs by a difference current curve to effectuate a higher rate of change. A second setpoint current curve is assigned to the constant setpoint current. The current controller is fed the first and second setpoint current curves.

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 fill level switch arrangement (1) for determining the fill level of a medium (2) in a container (3) and a method for determining the fill level of a medium (2) in a container (3) using a fill level switch arrangement (1). The fill level switch arrangement (1) has at least one alarm threshold that can be implemented in a simplified manner due to the fill level switch arrangement (1) having a transmitting element (4) and a receiving element (5), wherein the transmitting element (4) is used for transmitting a radio signal and is operatively connected to the receiving element (4), wherein the receiving element (5) is configured to detect radio signals, and wherein the receiving element (5) is configured such that it generates and transmits a switching signal in the event of a change in the received radio signal caused by the medium (2).

Abstract: A method for operating a measuring unit having at least one parameter sensor, at least a position sensor and/or an acceleration sensor, and at least a control and evaluation unit, the position sensor and/or the acceleration sensor being connected to the control and evaluation unit, the position sensor emitting a position signal and/or the acceleration sensor emitting an acceleration signal to the control and evaluation unit. At least one process relevant to the operation of the measuring unit is triggered when at least one part of the measuring unit is moved in a first movement pattern, wherein the first movement pattern comprises a sequence of at least two movements and/or at least a partial process of the process or a process is triggered when at least one part of the measuring unit is moved according to a second movement pattern, wherein the second movement pattern comprises at least one movement.

Abstract: A method for determining a property of a medium, wherein an excitation signal is generated and transmitted into the medium, a measuring signal is generated from the excitation signal transmitted into the medium, the measuring signal is measured, an amplitude of the excitation signal and an amplitude of the measuring signal are determined, and the property of the medium is determined using the amplitude of the excitation signal and the amplitude of the measuring signal. To provide a method in which the accuracy of determination of the property of the medium is improved, the amplitude of the excitation signal is determined by digitizing the excitation signal and applying a lock-in method to the digitized excitation signal and determining the amplitude of the measuring signal by digitizing the measuring signal and applying the lock-in method to the digitized measuring signal.

Abstract: A conductivity sensor for measuring the electrical conductivity of a liquid medium having at least a first coil, a current source and a control and evaluation unit, the current source being connected to the first coil. The conductivity sensor has the ability to determine a particularly large range of electric conductivity by at least a first electrode and a second electrode and at least one voltage measuring unit being provided, the voltage measuring unit being connected to the first electrode and the second electrode, the control and evaluation unit being connected to the current source and to the voltage measuring unit, and the first electrode and the second electrode being out of electrical contact with the first coil.

Abstract: A communication arrangement, a gate device and method for data communication between a mobile operating unit and a field device provides a certain ease in handling. The method involves a user program being loaded onto or activated on the mobile operating unit. Furthermore, data from the mobile operating unit is transmitted to a data communication device and from the data communication device to a gate device and from the gate device to a transmitting device of the field device and/or is transmitted in the opposite direction.

Abstract: A conductivity meter for measuring an electrical conductivity of a liquid medium having a housing, a conductive first measuring cell and a control device for controlling the first measuring cell, wherein the first measuring cell has a first conductivity measuring range, a first electrode and a second electrode, and wherein the first measuring cell and the control device are arranged at the housing. To provide a conductivity meter for measuring an electrical conductivity of a liquid medium, whose conductivity measuring range is increased, the conductivity meter has a second measuring cell with a second conductivity measuring range, that the second measuring cell is arranged at the housing, and that the control device is designed for controlling the second measuring cell.

Abstract: A device for the verification of organic compounds, comprising a miniaturized flame ionization detector (2) with a combustion chamber (3) for the analysis of a sample gas, having at least one oxygen feed line (4) to the combustion chamber (3), and having at least one hydrogen feed line (5) to the combustion chamber (3) and an electrolyzer for the generation of hydrogen and oxygen. To provide a device for the mobile verification of organic compounds, which has a low maintenance effort and a high reliability, the electrolyzer is designed as a PEM electrolyzer (6).

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.

Abstract: A method for determining the fill level of a medium (2) in a container (3) that is advantageous as compared to the prior art is achieved in that several emitting devices (6) are supplied with electromagnetic signals and that an emitting behavior of at least a portion of the emitting devices (6) is evaluated in view of the fill level of the medium (2).

Abstract: A flame ionization detector having at least one combustion chamber, at least one conduit for directing a gas or gas mixture, and at least one electrode structure, and a process for forming the flame ionization detector by providing two or more green ceramic films, forming geometric structures in said green ceramic films, depositing at least a portion of an electrically conductive structure on at least one of said green ceramic films, stacking said green ceramic films, laminating said green ceramic films, and sintering said laminated green ceramic films to form said flame ionization detector.

Abstract: A method for operating a measuring device having at least one measured value sensor for recording and forwarding measured values of a primary measured variable. To ensure a particularly high reliability and measuring accuracy, the recording of the measured value and/or the forwarding of the measured value is carried out in dependence on the operating state of the measuring device, recording of the measured value and/or the forwarding of the measured value being interrupted during a disturbance. The measuring device is wherein the measured value sensor is designed in such a manner that the recording of the measured value and/or the forwarding of the measured value is carried out in dependence on the operating state of the measuring device, wherein the recording of the measured value or the forwarding of the measured value is interrupted during a disturbance.