Waters Xevo G2 QTof, Operator'S, Overview And Maintenance Manual, Page: 104 / 248

5-28 Maintenance Procedures
4. Connect the power cords for the mass spectrometer and roughing pump
to the main power source.
5. Start the mass spectrometer (see page 2-2 ).
Tip:
After you add oil to the pump, the following situations can occur:
• The oil level drops slightly during the first month of operation.
• The oil changes color (darkens) over time.
• After running the pump for 12 to 48 hours, a few drops of oil can
sometimes appear around the lip of the filler plug, and eventually
run downward, dripping from the pump once it reaches operating
temperature.
• When the pump begins to run at normal operating temperature,
spilled oil becomes slightly odorous.
Cleaning the source components
Clean the sample cone and cone gas nozzle when these conditions apply:
• The sample cone and cone gas nozzle are visibly fouled.
• LC and sample-related causes for decreased signal intensity have been
dismissed.
See “Cleaning the sampling cone assembly” on page 5-29 .
If cleaning the sample cone and cone gas nozzles fails to increase signal
sensitivity, also clean the extraction cone (see page 5-38 ).
If cleaning the extraction cone fails to increase signal sensitivity, clean the ion
block and isolation valve (see page 5-46 ).
If cleaning the ion block and isolation valve fails to increase signal sensitivity,
also clean the source hexapole assembly (see page 5-57 ).