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101
Mass Spectrometer Maintenance
Turn off the Mass Spectrometer
WARNING:
BURN HAZARD
Allow heated zones to cool before disassembly.
Turn off the mass spectrometer by invoking the Shutdown procedure. Refer to
chapter on system Start-up and Shutdown.
1. Shut off the turbomolecular pump, foreline pump, and all electronics by
turning off the main power switch on the back panel.
2. Disconnect the Saturn power cord.
3. Open the front-panel door and lift the toggle vent valve for 1 sec to slow the
turbomolecular pump down.
4. Once the pump has finished spinning down, open the vent valve. Leave it open
until the system is fully vented, i.e., about 5-10 minutes.
Retract/Remove the Transfer Line
NOTE: Fully vent the analyzer assembly before attempting to retract or remove
the transfer line. Vacuum makes retraction of the transfer line difficult.
To retract the transfer line, proceed as follows:
1. Unplug the transfer line heater cable.
2. Take hold of the transfer line nose.
3. Simultaneously push and rotate the nose counterclockwise.
4. Pull the transfer line away from the analyzer.
•
Under most conditions, the transfer line needs only to be retracted in
order to remove the analyzer. If it is necessary to remove the transfer
line (i.e., to inspect or change the O-ring), perform steps 5 and 6.
5. Remove the nose clip by pulling both sides away from the boot.
•
Take care not to apply excessive force.
6. Pull the nose away from the analyzer until the entire assembly is free of the
transfer-line shell.
•
Exercise particular care if the column is still connected to the transfer
line.
