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System Start-up and Shutdown
System Start-up and Shutdown
Diffusion Pump Shutdown
NOTE: During the SHUTDOWN procedure, the GC and MS temperature zones
are reduced (<80 °C). The system is manually vented to atmosphere when the
trap temperature is less than 80 °C.
From the System Control click on Shutdown tab. The display of the Shutdown
program appears and click on Shutdown.
The shutdown procedure and capabilities for the Diffusion Pump system are
similar to the turbomolecular system.
Shutdown Page
NOTE: The Diffusion Pump System shutdown sequence takes at least 30
minutes.
•
The Saturn GC/MS heaters are turned OFF.
•
The GC temperature zones should be cooled downed before
maintenance is performed.
•
The diffusion pump heater is turned OFF while the Peltier Baffle cooler is
kept on. The DIFFUSION PUMP STATUS changes from NORMAL to
COOLING. After 15 minutes, at which time there is no longer any pump
vapor to contaminate the system, the Peltier Baffle cooler is turned OFF.
After another 15 minutes, the cooler has warmed to the point that it won’t
condense water vapor, and the pump is considered to be off. The
DIFFUSION PUMP STATUS changes from COOLING to OFF.
NOTE: If the word “FAULT!” is displayed in the Vacuum Status box, click on
Diagnostics tab for detailed information on fault.
