Patent ID: 11939760
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E  Y | IPC E

Claim 1:
2. The method of claim 1, further including the steps of:
detecting the vacuum level at the collection station after reducing the vacuum level operating range for the collection station;
detecting the vacuum level at the location in the system after reducing the vacuum level operating range for the collection station;
comparing the vacuum level detected at the location in the system after the vacuum level operating range for the collection station has been reduced with the specified vacuum level for the location; and
if the vacuum level detected at the location in the system after the vacuum level operating range for the collection station has been reduced is equal to or greater than the specified vacuum level for the location and the vacuum level detected at the collection station after the vacuum level operating range for the collection station has been reduced is within the reduced vacuum level operating range for the collection station, further reducing the vacuum level operating range for the collection station.