Abstract: A method for measuring a fill level of a fill substance in a container with a fill-level measuring device working according to the travel time principle. The fill-level measuring device in measurement operation sends transmission signals toward the fill substance in the container and, based on their signal fractions reflected back in the container, derives echo functions, which give the amplitudes of the signal fractions as a function of their travel time.

Abstract: A method for evaluation of measurement signals of a level gauge, which works according to the transit time principle, comprising the steps of transmitting a transmission signal towards a filling material; receiving an echo signal of the transmission signal; determining a fill level of the filling material according to the transit time principle of the echo signal; determining at least one parameter of the echo signal; and storing the values of the at least one parameter and the corresponding fill level. The at least one parameter is a phase position of the echo signal and/or a rate at which a height of the filling material in a tank changes and/or a change in amplitude of the echo signal and/or a temperature of the filling material and/or a temperature change of the filling material and/or a change in the amplitude variation of the echo signal.

Abstract: A method for measuring a fill level of a fill substance in a container, in which, in an empty container, at least a part of the microwave signals transmitted into the container is reflected back via a reflection on a floor of the container. Microwave signals are transmitted into the container and their fractions reflected back to the fill-level measuring device. These are received as received signals. Echo functions are derived, which show amplitudes of the received signals as a function of a position corresponding to their travel time traveled in the container. A container floor echo is detected at a position, which lies in an earlier determined, both sides limited, empty echo position range, in which the container floor echo occurs in the case of empty container, at an empty echo position dependent on a shape of the container and an installed position of the fill-level measuring device.

Abstract: A method for determining and/or monitoring fill level of a medium in a container with a measuring device, which works according to the travel time measuring method, wherein measurement signals are transmitted toward the medium and are received, wherein from the high-frequency total measurement signal, composed by superimposing the transmitted measurement signals, the reflected wanted echo signals and the disturbance echo signals, a raw echo curve or digitized envelope curve is ascertained. The wanted echo signals and/or the disturbance echo signals in the raw echo curve or the digitized envelope curve are ascertained based on an ideal echo curve, which shows the amplitude of the echo signals of an ideal reflector as a function of the distance from the ideal reflector, and based on the ascertained wanted echo signal the fill level is determined.

Abstract: A method for measuring fill level of a fill substance located in a container with a fill-level measuring device. Transmission signals are sent by means of a transmitting and receiving unit into the container and their fractions reflected on reflectors in the container back to the transmitting and receiving unit, and received as received signals. Based on the received signals echo functions are derived, which give amplitudes of the received signals as a function of position corresponding to associated travel time, and wanted echos of predetermined wanted echo types respectively contained in the echo functions and identifiable based on predetermined echo recognition methods are ascertained. Each wanted echo is a local maximum and is attributable to a reflection on a reflector associated with its wanted echo type, especially a surface on the fill substance, a container floor or a disturbance located in the container.

Abstract: A method for measuring fill level and a measuring device for performing the method, wherein, in measuring cycles following one after the other, signal pulses of predetermined frequency sent by means of a transmitting and receiving system with a predetermined repetition frequency into a container, and their signal components reflected back in the container in the direction of the transmitting and receiving system after a travel time dependent on their traveled path, are received as received signal. A fill level is measured taking into consideration a phase relationship between the transmitted and received signals related physically with the fill level to be measured.

Abstract: A method for measuring a fill level of a fill substance in a container, in which, in an empty container, at least a part of the microwave signals transmitted into the container is reflected back via a reflection on a floor of the container. Microwave signals are transmitted into the container and their fractions reflected back to the fill-level measuring device. These are received as received signals. Echo functions are derived, which show amplitudes of the received signals as a function of a position corresponding to their travel time traveled in the container. A container floor echo is detected at a position, which lies in an earlier determined, both sides limited, empty echo position range, in which the container floor echo occurs in the case of empty container, at an empty echo position dependent on a shape of the container and an installed position of the fill-level measuring device.

Abstract: A method for ascertaining and monitoring fill level of a medium in a container by means of a field device by a travel time measuring method, wherein transmission signals are transmitted in the direction of the medium and reflection signals are received, wherein received reflection signals are registered as echo signals in an echo function dependent on travel time or travel distance, wherein position and/or amplitude at least of a wanted echo signal in the echo function are/is ascertained by means of an echo search algorithm and a continuous echo tracking of changes of position and/or of changes of amplitude of the wanted echo signal in the echo function is performed in a defined search window, wherein position and/or amplitude at least of a wanted echo signal is maintained, in case no wanted echo signal is ascertained in the search window, wherein from position and/or amplitude at least of a wanted echo signal, fill level is ascertained, and wherein a measured value of fill level is output.

Abstract: A method for ascertaining and monitoring fill level of a medium in a container by means of a field device by a travel time measuring method, wherein transmission signals are transmitted in the direction of the medium and reflection signals are received, wherein received reflection signals are registered as echo signals in an echo function dependent on travel time or travel distance, wherein position and/or amplitude at least of a wanted echo signal in the echo function are/is ascertained by means of an echo search algorithm and a continuous echo tracking of changes of position and/or of changes of amplitude of the wanted echo signal in the echo function is performed in a defined search window, wherein position and/or amplitude at least of a wanted echo signal is maintained, in case no wanted echo signal is ascertained in the search window, wherein from position and/or amplitude at least of a wanted echo signal, fill level is ascertained, and wherein a measured value of fill level is output.