Waters Xevo G2 QTof, Operator'S, Overview And Maintenance Manual, Page: 114 / 248

5-38 Maintenance Procedures
3. Grasp the cone gas nozzle handle, and use it to rotate the sampling cone
assembly 90 degrees, moving the handle downward from the horizontal
to the vertical position.
4. Open the source isolation valve (see page 5-16 ).
5. Close the source enclosure.
Cleaning the extraction cone
Clean the ion block and extraction cone if cleaning the sample cone and cone
gas nozzle fails to increase signal sensitivity. You must remove the ion block
assembly from the source assembly in order to clean the extraction cone.
Removing the ion block assembly from the source assembly
Required materials
• Chemical-resistant, powder-free gloves
• Combined 2.5-mm Allen wrench and cone extraction tool
To remove the ion block assembly:
1. Vent and shut down the mass spectrometer (see the mass spectrometer’s
online Help for details).
2. Disconnect the power cords for the mass spectrometer and roughing
pump from the main power source.
Warning:
The source components can be contaminated with
biohazardous and/or toxic materials. Always wear
chemical-resistant, powder-free gloves while performing this
procedure.