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

Claim 5:
6. A leak detection system for detecting a fluid leak from a fluid line, comprising:
a leak detection line coupled to the fluid line extending between a supply valve and a return valve;
an on-off valve attached to the leak detection line;
a flow meter configured to measure a flow rate of fluid flowing through the leak detection line;
an operation controller configured to detect the fluid leak from the fluid line based on a first flow rate measured by the flow meter;
a drain line communicating with the fluid line and the leak detection line, the drain line being located downstream of the flow meter; and
a drain valve attached to the drain line,
the operation controller being configured to:
close the supply valve and the return valve;
open the on-off valve and the drain valve;
obtain, from the flow meter, a measured value of a 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 a predetermined reference value.