Abstract: A method for determining and/or monitoring at least one process variable of a medium in a containment using a measuring probe having two electrodes comprises, in a first operating mode, supplying a first electrode of the measuring probe with a first excitation signal, wherein a second electrode of the measuring probe serves as receiving electrode, and wherein a first received signal is received from the measuring probe, in a second operating mode, supplying the first electrode of the measuring probe with a second excitation signal, wherein the second electrode of the measuring probe serves as ground electrode, and wherein a second received signal is received from the measuring probe, and ascertaining the at least one process variable based on the first and/or second received signal. Further disclosed is a device embodied for performing a method of the invention.

Abstract: A method for determining and/or monitoring the conductivity of a medium using a measuring probe having at least one electrode comprises method steps as follows: supplying the measuring probe with an excitation signal, receiving a received signal by the measuring probe, ascertaining an ohmic part of the received signal, and determining the conductivity of the medium based on the ohmic part of the received signal. Furthermore, the invention relates to a device embodied for performing the method of the invention.

Abstract: A method for monitoring condition of a vibronic sensor for determining and/or monitoring at least one process variable of a medium in a containment and having at least one sensor unit having a mechanically oscillatable unit includes: exciting the mechanically oscillatable unit by means of an excitation signal such that mechanical oscillations are executed, and receiving the mechanical oscillations in the form of a received signal, determining a measured value for amplitude and a measured value for frequency of the received signal, comparing the measured values for amplitude and frequency with reference values for amplitude and frequency, and ascertaining a condition indicator from the comparison.

Abstract: A method for determining and/or monitoring a predeterminable fill level of a medium in a container using a vibronic sensor having at least one sensor unit with a mechanically vibratable unit, comprises exciting the mechanically vibratable unit with an excitation signal to produce mechanical vibrations, and receiving the mechanical vibrations in the form of a reception signal, determining an amplitude and a frequency of the reception signal, comparing the frequency and amplitude of the reception signal with a predeterminable frequency limit value and a predeterminable amplitude limit value, and determining a reaching of the predeterminable fill level on the basis of the comparison.

Abstract: Provided is a method for process monitoring in automation technology based at least on one capacitive and/or conductive measuring probe for determining at least one process variable of at least one medium in a container, an apparatus suitable for executing the method, as well as a computer program and a computer readable medium. The method includes method steps of ascertaining whether the measuring probe is at least partially in contact with the medium and registering as a function of time at least an electrical conductivity of the medium, a dielectric constant of the medium and/or a degree of coverage of the measuring probe by the medium. The method also includes a step of monitoring the process running within the container based on the electrical conductivity, the dielectric constant and/or the degree of coverage as a function of time.

Abstract: Disclosed is a method for diagnosis of a two-conductor field instrument and a corresponding two-conductor field instrument. In a normal operating mode, an input voltage is provided and an output current is output.

Abstract: A method for monitoring condition of a vibronic sensor for determining and/or monitoring at least one process variable of a medium in a containment and having at least one sensor unit having a mechanically oscillatable unit includes: exciting the mechanically oscillatable unit by means of an excitation signal such that mechanical oscillations are executed, and receiving the mechanical oscillations in the form of a received signal, determining a measured value for amplitude and a measured value for frequency of the received signal, comparing the measured values for amplitude and frequency with reference values for amplitude and frequency, and ascertaining a condition indicator from the comparison.

Abstract: The present disclosure relates to a measuring system including: an automation field device embodied for determining and/or monitoring a process variable of a medium; a connection unit, which includes a connection plug, which is electrically connected with the field device, and a cable, which is connected to the connection plug with a cable connection and which serves for supplying the field device with electrical energy and/or for transmitting information between the field device and a superordinated unit; and a protective cover, which surrounds the connection unit and the field device connected with the connection unit in a protection section, wherein by means of the protective cover the impact resistance of the measuring system in the protection section is increased.

Abstract: The present disclosure relates to an apparatus for determining and/or monitoring at least one process variable of a medium in a containment, comprising a sensor unit and an electronics unit, wherein the electronics unit includes a transceiver unit and a transceiver protecting unit for limiting an input voltage of the transceiver unit to a first transceiver voltage value. According to the present disclosure, the transceiver protecting unit includes a first limiting unit and a transistor unit, the transistor unit connected in series with the transceiver unit, wherein the first limiting unit is connected in parallel with transceiver unit and to a control terminal of the transistor and is configured to control an input voltage for the control terminal of the transistor to a predeterminable control value such that the input voltage of the transceiver unit is limited to the first transceiver voltage value.

Abstract: Disclosed is an apparatus for determining and/or monitoring a predetermined fill level of a medium in a containment. The apparatus includes a sensor unit and an electronics unit. The electronics unit includes a limiting unit embodied to limit an electrical current or voltage in at least one portion of the electronics unit, a switching unit embodied to control a process switch, and a signal transformation unit embodied to transform a dynamic, electrical input signal into a static, electrical output signal. The static output signal flows through at least one component of the electronics unit. Furthermore, the electronics unit is embodied to supply the sensor unit with an excitation signal, to receive from the sensor unit a received signal, to determine and/or to monitor whether the predetermined fill level has been reached, and to produce a control signal.

Abstract: Disclosed is a method for diagnosis of a two-conductor field instrument and a corresponding two-conductor field instrument. In a normal operating mode, an input voltage is provided and an output current is output.

Abstract: A sensor adapter for a device for determining and/or monitoring at least one process variable of a medium in a container with a measuring probe, comprising: at least one adapter measuring probe with at least one adapter electrode, an adapter housing with structure for detachably fastening the sensor adapter on the device, and a contacting unit for the electrical contact of at least one electrode of the device with at least one adapter electrode of the sensor adapter.

Abstract: Apparatus for capacitive determining and/or monitoring of at least one process variable of a medium in a container, comprising at least one sensor unit with at least one sensor electrode, a housing and an electronics unit, wherein the electronics unit is embodied to supply the sensor unit with a high-frequency exciter signal, to receive a response signal from the sensor unit, and to provide at least from the response signal information concerning the fill level of medium in the container. The apparatus includes, furthermore, a coupling element, which is arranged and embodied in such a manner at least at times to establish a conductive connection between at least one portion of the housing and at least one component of the electronics unit and at least at times to effect a capacitive coupling between the two components.

Abstract: The present disclosure relates to a measuring system including: an automation field device embodied for determining and/or monitoring a process variable of a medium; a connection unit, which includes a connection plug, which is electrically connected with the field device, and a cable, which is connected to the connection plug with a cable connection and which serves for supplying the field device with electrical energy and/or for transmitting information between the field device and a superordinated unit; and a protective cover, which surrounds the connection unit and the field device connected with the connection unit in a protection section, wherein by means of the protective cover the impact resistance of the measuring system in the protection section is increased.

Abstract: The present disclosure relates to an apparatus for determining and/or monitoring at least one process variable of a medium in a containment, comprising a sensor unit and an electronics unit, wherein the electronics unit includes a transceiver unit and a transceiver protecting unit for limiting an input voltage of the transceiver unit to a first transceiver voltage value. According to the present disclosure, the transceiver protecting unit includes a first limiting unit and a transistor unit, the transistor unit connected in series with the transceiver unit, wherein the first limiting unit is connected in parallel with transceiver unit and to a control terminal of the transistor and is configured to control an input voltage for the control terminal of the transistor to a predeterminable control value such that the input voltage of the transceiver unit is limited to the first transceiver voltage value.

Abstract: A sensor adapter for a device for determining and/or monitoring at least one process variable of a medium in a container with a measuring probe, comprising: at least one adapter measuring probe with at least one adapter electrode, an adapter housing with structure for detachably fastening the sensor adapter on the device, and a contacting unit for the electrical contact of at least one electrode of the device with at least one adapter electrode of the sensor adapter.

Abstract: The present disclosure relates to a method for process monitoring in automation technology based at least on one capacitive and/or conductive measuring probe for determining at least one process variable of at least one medium in a container, an apparatus suitable for executing the method, as well as a computer program and a computer readable medium. The method comprises method steps ascertaining whether the measuring probe is at least partially in contact with the medium and registering as a function of time at least an electrical conductivity of the medium, a dielectric constant of the medium and/or a degree of coverage of the measuring probe by the medium. The method also includes a step of monitoring at least one, or the, process running within the container based on the electrical conductivity, the dielectric constant and/or the degree of coverage as a function of time.

Abstract: The present invention relates to a method for capacitive determining and/or monitoring of at least one process variable of a medium as well as to a corresponding apparatus. According to the invention, at least method steps as follows are executed: supplying a probe electrode with at least a first electrical, excitation signal having at least a first predeterminable frequency, receiving a first electrical, received signal from the probe electrode, ascertaining a measured capacitance of the probe electrode or the measured capacitance and a media/accretion resistance of the probe electrode from at least the first received signal, and determining the at least one process variable based on the value of the measured capacitance.

Abstract: The present disclosure relates to an apparatus for determining and/or monitoring a predetermined fill level of a medium in a containment, comprising a sensor unit and an electronics unit. The electronics unit includes a limiting unit embodied to limit an electrical current or an electrical voltage in at least one portion of the electronics unit, a switching unit embodied to control a process switch having at least first and second switch states, and a signal transformation unit embodied to transform a dynamic, electrical input signal into a static, electrical output signal, and wherein the static output signal flows through at least one component of the electronics unit. Furthermore, the electronics unit is embodied to supply the sensor unit with an excitation signal, to receive from the sensor unit a received signal, to determine and/or to monitor whether the predetermined fill level has been reached, and to produce at least one control signal.

Abstract: In a plug connector for connecting a field device of automation technology to an energy supply and/or to an evaluation unit, the plug connector includes a connection plug (M12) for the field device, wherein the connection plug (M12) is composed, at least partially, of a transparent material, wherein at least four display elements (gn ye, ye, rd) are arranged in the connection plug (M12). A first display element (gn) signals operational readiness of the field device; second and third display elements (ye, ye) signal two antivalent switch outputs (MIN, MAX) of the field device; and a fourth display element (rd) signals a disturbance or malfunction of field device. A circuit (NOR, XNOR) is provided to detect a disturbance or malfunction of field device based on the antivalent switch outputs (MIN, MAX) of the field device, and to activate fourth display element (rd) upon detection.