Radar level gauge system with variable alarm limits
First Claim
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.
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Accused Products
Abstract
A radar level gauge system for determining the filling level of a filling material in a tank is disclosed. The system comprises a transmitter for transmitting measuring signals towards the surface of the filling material; a receiver for receiving echo signals from the tank; 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 said threshold value in said storage means is replaceable and/or adjustable. The alarm signal could indicate high level and/or overfill. The possibility of adjusting/replacing the threshold values enables adjustment of the alarm levels when the system is already installed.
A corresponding method of operation is also disclosed.
31 Citations
17 Claims
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1. A radar level gauge system for continuously determining a filling level of a filling material in a tank, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of continuously determining a filling level of a filling material in a tank, comprising:
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transmitting measuring signals towards a surface of the filling material; receiving echo signals from said surface; determining the filling level of the tank based on said received echo signals; storing at least one preset threshold value; producing an alarm signal in dependence of said determined filling level and said threshold value; and adjusting the preset threshold value , wherein the alarm signal is produced when the determined filling level exceeds a first threshold value and wherein a produced alarm signal is deactivate 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. - View Dependent Claims (17)
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Specification