MS Detector Maintenance
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_________________________________________________________ API Source Maintenance
_______________________ Finnigan LTQ Hardware Manual _____________________
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Maintaining the PhotoMate Light Source
Maintaining the PhotoMate light source involves the following:
• Cleaning and polishing the VUV lamp
• Replacing the VUV lamp
Refer to the topic Maintaining the APPI Probe in the Finnigan Ion Max
API Source Hardware Manual for procedures for maintaining the APPI
probe.
Maintaining the Ion Source Interface
The ion source interface includes the ion sweep cone, ion transfer capillary,
capillary heater, tube lens, and skimmer. The ion transfer capillary has a finite
lifetime. You need to replace the ion transfer capillary if the ion transfer
capillary bore becomes corroded.
You should flush the ion sweep cone and the bore of the ion transfer capillary
at the end of each working day with a 50:50 methanol:water solution. Refer to
the topic Flushing the Ion Sweep Cone and Ion Transfer Capillary on
page 3-9.
The ion transfer capillary can be easily removed for cleaning or replacement
without venting the system. Refer to the topic Removing and Cleaning the
Ion Transfer Capillary on page 4-8.
To access the tube lens and skimmer for cleaning or to replace ion source
interface components other than the ion transfer capillary and ion sweep cone,
do the following:
• Shut down and vent the system
• Remove the Ion Max ion source
• Remove the ion source interface
• Clean or replace ion source interface components
• Reinstall the ion source interface
• Reinstall the Ion Max ion source
• Start up the system
Shutting Down the System
Shut down and vent the system as described in the topic Shutting Down the
System Completely in the System Shutdown, Startup, and Reset chapter.
Wait several minutes for the LTQ to vent.
Go on to the next topic: Removing the Ion Max Ion Source.
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