Patent ID: 11898940
Assignee: EBARA CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 7:
8. The leak detection system according to claim 6, wherein the operation controller is configured to:
close the supply valve, the return valve, and the drain valve;
open the on-off valve;
obtain, from the flow meter, a measured value of the first flow rate of fluid in the leak detection line;
determine no fluid leak from the fluid line when the first flow rate is equal to or lower than a predetermined threshold value; then
open the drain valve, with the supply valve and the return valve closed, and with the on-off valve opened;
obtain, from the flow meter, a measured value of the second flow rate of fluid in the leak detection line; and
determine that the leak detection system has a defect when the second flow rate is lower than the predetermined reference value.