Waters Xevo G2 QTof, Operator'S, Overview And Maintenance Manual, Page: 96 / 248

5-20 Maintenance Procedures
Inspecting the Varian roughing pump oil level
Note:
This procedure is not required for an Edwards oil-free roughing pump
Requirement:
You must determine the oil level while the roughing pump is
running.
The roughing pump oil level appears in the pump’s oil-level sight glass.
Inspect the oil level weekly, while the pump is running. If the oil level is
significantly below the maximum oil level indicated by the oil level sight glass,
add oil to the pump (see page 5-21 ).
Sight glass for the roughing pump oil level:
Caution:
To ensure correct operation of the roughing pump, do not
operate the pump with the oil level outside the range shown by the oil
level sight glass minimum and maximum oil level indicators.
Maximum oil level
Minimum oil level