METHOD FOR DETERMINING AND MONITORING THE LEVEL OF A MEDIUM IN A CONTAINER ACCORDING TO A RUNTIME MEASUREMENT METHOD

摘要

The present invention relates to a method for determining and monitoring the level of a medium in a container by means of a field device according to a runtime measurement method, wherein transmission signals are emitted in the direction of the medium and reflection signals are received, wherein the received reflection signals are captured as echo signals in an echo function or envelope curve dependent on the runtime or run distance, wherein an echo search algorithm is used to determine at least one useful echo signal in the echo function or envelope curve, wherein the echo function or envelope curve is preprocessed by means of at least one filter with filter parameters, wherein at least one first filter range with a first width is predefined at the position of the useful echo signal in the echo function or envelope curve and thus at least three filter ranges are formed in the echo function or envelope curve.