Patent ID: 7319401
Filing Date: 2008-01-15
Classification: G01F

Abstract:
1. A radar level gauge system for continuously determining a filling level of a filling material in a tank, comprising: a transmitter for transmitting measuring signals towards a surface of the filling material; a receiver for receiving echo signals from said surface; processing circuitry for determining the filling level of the tank based on said echo signal and adapted to compare said determined filling level with at least one preset threshold value and to produce an alarm signal in dependence of said threshold value; and a storage means for storing the preset threshold value, wherein the storage means is controllable, whereby the threshold value stored in said storage means is operator adjustable, wherein the processing circuitry is adapted to produce an alarm signal when the determined filling level exceeds a first threshold value and wherein the processing circuitry is adapted to deactivate a produced alarm signal when the determined filling level is lower than a second threshold value, said second threshold value corresponding to a lower filling level than said first threshold value.