Abstract: A pressure sensor includes a hydraulic path filled with a pressure transfer liquid and a pressure transducer having a pressure sensitive deformation body. The hydraulic path includes a channel which extends from a pressure input opening at least to the deformation body, wherein the pressure input opening is spaced a separation distance from the deformation body, and wherein pressure on the deformation body deviates from pressure at the pressure input opening by the difference of the hydrostatic pressure of the pressure transfer liquid between the pressure input opening and the deformation body.

Abstract: A method for ascertaining and monitoring fill level of a medium in a container a field device using a travel time, measuring method, wherein transmission signals are transmitted and reflection signals received. The received reflection signals are registered as echo signals in an echo function, wherein masking curve, evaluation curves and/or echo parameters of the echo signals in the echo function are ascertained or predetermined, as well as stored in a first measuring cycle. By a static echo search algorithm, through the masking curve, the evaluation curve, the echo parameters, position and/or amplitude of at least one wanted echo signal are/is ascertained, wherein, a dynamic echo search algorithm, a continuous echo tracking of positional changes and/or amplitude changes of individual echo signals and/or the wanted echo signal in the echo function is performed.

Abstract: A method for testing an electronics unit, especially an electronics unit of an apparatus for ascertaining and/or monitoring a process variable, wherein the electronics unit has a plurality of electrical components. At least a part of the electrical components is grouped into at least one group, and this group is supplied with a query signal. A response signal is received from the group, and the response signal is evaluated. Furthermore, the invention relates to an apparatus for determining and/or monitoring a process variable.

Abstract: An apparatus for ascertaining and/or monitoring fill level of a medium, having piezoelectric sensors for producing and receiving ultrasonic signals, relates to a scanning circuit, which provides, for each piezoelectric sensor to be driven, at least one exciter switching circuit for selective driving of the selected piezoelectric sensor.

Abstract: A configurable field device for automation technology with a partially dynamically reconfigurable logic chip FPGA, in which function modules are dynamically configured during runtime, and to a method for operating the configurable field device.

Abstract: An apparatus for determining and/or monitoring at least one process variable of a medium, including: at least one mechanically oscillatable membrane, which has a plurality of natural eigenmodes; and at least one driving/receiving unit, which excites the membrane to execute mechanical oscillations and/or which receives mechanical oscillations from the membrane. The driving/receiving unit and the membrane are embodied and matched to one another in such a manner, that the membrane executes only mechanical oscillations, which correspond to modes, which lie above the fundamental mode of the membrane.

Abstract: A method using an antenna arrangement. The antenna arrangement includes a switched transmission antenna array with a number of transmission antennas, which radiate a radar transmission signal one after the other corresponding to a predetermined switching sequence. A first receiving antenna and a second receiving antenna receive the transmitted radar signals and reflected by at least one radar target. A first set of received signals by the first receiving antenna during the switching sequence of the transmission antenna array; receiving a second set of received signals by the second receiving antenna simultaneously with receiving the first set of received signals by the first receiving antenna during the switching sequence of the transmission antenna array; and from these signals the angular position of the at least one radar target based on the first set and the second set of received signals using an ESPRIT method is determined.

Abstract: A method for updating device descriptions for field devices in process automation technology by loading the required descriptions from an external server (S), by means of an application program, into a controller (for example, PC1; PC2).

Abstract: An apparatus forming a measuring device for ascertaining and monitoring a chemical or physical process variable in a high temperature process in a container, wherein the measuring device is formed from at least a sensor element located in the process and at least a measurement transmitter located outside the process. At least a first sealing element is provided for sealing against penetration of process medium into the sensor element. The sensor element has a boundary location between a first sensor element region, which faces the process and which is embodied with a high thermal resistance, and a second sensor element region, which faces away from the process and which has a low thermal resistance, and that the temperature sensitive element is arranged in the sensor element at the boundary location.

Abstract: An antenna array for a radar sensor, wherein the antenna array has a number of antenna elements linearly arranged next to one another. The antenna elements are designed for transmitting or receiving a radar signal, and the antenna array has a switching unit, which is designed to connect the antenna elements according to a predetermined switching sequence individually, one after the other in time, with a transmitting or receiving unit of the radar sensor. The switching sequence, according to which the antenna elements are connected one after the other with the transmitting or receiving unit, deviates from the spatial sequence of the antenna elements in the antenna array.

Abstract: A method for start-up and/or operation of a communication system composed of at least one multivariable sensor, at least one converter unit and at least one receiving unit, which are connected with one another via a two-wire line. A wherein a primary measured value in the form of an analog signal and extra measured values in the form of an encoded digital signal modulated on the analog signal are provided from the multivariable sensor via the two-wire line, wherein only analog signals are received by the receiving unit. The extra measured values are scaled in the multivariable sensor into formatted values by means of a conversion algorithm, wherein at least the formatted values are requested and received by the converter unit, and wherein corresponding analog signals of the extra measured values are produced from the formatted values in the converter unit by a fixedly predetermined, unconfigurable, reconversion algorithm.

Abstract: An apparatus for ascertaining and/or monitoring a process variable, especially density of a medium. The apparatus includes: an exciting/receiving unit, which excites a mechanically oscillatable unit to execute mechanical oscillations and which receives the mechanical oscillations; an electronics unit, which applies to the exciting/receiving unit an electrical, exciter signal, and which obtains from the exciting/receiving unit an electrical, received signal. The electronics unit produces the exciter signal in such a manner, that, between the received signal and the exciter signal, a phase difference equal to a desired value of phase difference results, at which effects of changes of viscosity on mechanical oscillations of the mechanically oscillatable unit are negligible, and that the desired value of phase difference is predetermined as a function of the ratio of impedance of the exciting/receiving unit to the input impedance of the electronics unit.

Abstract: A method for determining and/or monitoring at least one physical, process variable of a medium with an oscillatable unit, wherein a transmitting/receiving unit excites the oscillatable unit by means of transmission signals to execute oscillations. The oscillations of the oscillatable unit are received in the form of received signals, and the process variable is determined and/or monitored based on the frequency and/or the amplitude of the received signal and/or phase shift between the transmission and the received signals. The time behavior of the amplitude of the received signal is examined and evaluated as a function of a time variation of the exciting of the oscillatable unit, and is determined therefrom whether accretion has formed on the oscillatable unit.

Abstract: A housing comprises a first housing part, having a first bearing surface for a first contact surface of a sealing ring, and a second housing part, which can be screwed together with the first housing part and has a second bearing surface for a second contact surface of the sealing ring. The first contact surface of the sealing ring is produced from a first material having a first coefficient of friction in relation to the material of the first bearing surface, the second contact surface of the sealing ring is produced from a second material that has a second coefficient of friction in relation to the material of the second bearing surface, and the first coefficient of friction is smaller than the second coefficient of friction.

Abstract: An apparatus for ascertaining and/or monitoring a process variable. The apparatus includes a sensor element, and at least one electronics unit, which, for measuring the process variable, supplies the sensor element with an electrical exciter signal, receives an electrical measurement signal from the sensor element and evaluates the measurement signal with respect to the process variable. An analog-digital converter is provided in the electronics unit. For measuring the process variable, the electronics unit supplies the sensor element with a first exciter signal and a second exciter signal, timewise one after the other, in such a manner, that the first exciter signal and the second exciter signal have a settable phase (?)relative to one another.

Abstract: A pressure transfer device comprises a pressure transfer device body and an isolating diaphragm, wherein, between the surface of the body of the pressure transmitting device and the isolating diaphragm, a pressure chamber is formed, whose volume is dependent on the position of the isolating diaphragm. The isolating diaphragm has a material thickness and a deflectable working region with an area A, wherein the isolating diaphragm has a reference position, in which the pressure chamber contains a reference volume Vref, and the isolating diaphragm is deflectable from the reference position at least so far in two directions, that the volume of the pressure chamber varies between values of up to Vref+/??Vdesired, wherein associated with a volume change ?V is a dimensionless deflection measure w, with w(?V):=(3·?V)/(A·h), wherein ?Vdesired is dimensioned in such a way, that |w(?Vdesired)|?2.5; wherein, in the case of all w(?V), for which |w(?V)|?|w?(?V)|, wherein |w?(?V)|?0.

Abstract: A measuring device working with high frequency microwaves, especially frequencies above 70 GHz, comprises a microwave module for the production of microwave transmission signals and/or for the reception and processing of received microwave signals, and an antenna unit for the transmission of the microwave transmission signals and/or for the receipt of the received microwave signals. The measuring device has a cost effective, flexibly usable connection between the microwave module and the antenna unit suitable for the transmission of high frequency microwave signals, especially frequencies of 70 GHz and more. The microwave module and the antenna unit are connected to one another via a dielectric waveguide, via which a transmission of the microwave transmission signals from the microwave module to the antenna unit and/or a transmission of the received microwave signals from the antenna unit to the microwave module occurs.

Abstract: A method for monitoring the functioning of a field device, wherein the field device provides a complex measurement signal, which is produced from a number of individual measurements following one another in time, comprising method steps as follows: the complex measurement signals are stored within a predetermined time window; the occurrence of a predetermined event is monitored in the field device; the stored complex measurement signals are overwritten for the case, in which the predetermined event does not occur within the predetermined time window; for the case, in which the predetermined event occurs within the predetermined time window, both a first defined number of complex measurement signals, which were ascertained in time directly before the occurrence of the event, are frozen, as well as a second defined number of complex measurement signals, which were ascertained in time directly after the occurrence of the predetermined event, are stored.

Abstract: A multivariable sensor for determining and/or monitoring a predetermined fill level and density and/or viscosity of a liquid in a container. The sensor comprises a measuring tube provided in the container. The measuring tube has at least a first oscillatable segment and a second oscillatable segment, wherein the oscillatable segments have a cross sectional area deviating from a circularly round shape and at least one straight side, wherein on an inner wall of the oscillatable segments, driver/receiving units are placed, which cause the oscillatable segments to execute resonant oscillations. At least one control/evaluation unit is provided, which evaluates frequency and/or phase and/or amplitude of the oscillations and determines therefrom reaching of the predetermined fill level and density and/or viscosity of the liquid.

Abstract: An apparatus for ascertaining and monitoring the fill level of a medium in a container by means of a travel-time measuring method. The apparatus includes: A coupling unit for coupling measurement signals onto/from at least one conductive, first element extending into the container; a first securement element provided in the region of the coupling unit for securing the apparatus at the container; and a control/evaluation unit for ascertaining a fill-level measurement signal. The apparatus has a high transfer quality, while, at the same time, being mechanically and chemically stable.