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

Claim 0:
1. An inspection method for use in a leak detection system configured to detect a fluid leak from a fluid line, the leak detection system including:
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 method comprising:
measuring a second flow rate of a fluid in the leak detection line of the leak detection system by the flow meter; and
determining that the leak detection system has a defect when the second flow rate is lower than a predetermined reference value.