Patent ID: 11927469
Assignee: ROSEMOUNT TANK RADAR AB
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. A radar level gauge system for determining a filling level of a product in a tank, the radar level gauge system comprising:
a transceiver for generating, transmitting and receiving electromagnetic signals;
a signal propagation arrangement connected to the transceiver and arranged to propagate an electromagnetic transmit signal from the transceiver towards the product in the tank, and to return to the transceiver an electromagnetic reflection signal resulting from reflection of the electromagnetic transmit signal at a surface of the product; and
measurement representation forming circuitry for forming a measurement representation based on the transmit signal and the reflection signal, the measurement representation comprising surface echo information indicative of the filling level of the product;
proof test echo information adding circuitry, for adding to the measurement representation, proof test echo information indicative of a predefined proof test level corresponding to, or being higher than, a high level alarm limit of the radar level gauge system, resulting in a modified measurement representation; and
level determining circuitry coupled to the transceiver and configured to determine a proof test level based on the modified measurement representation.