WARNING:
SHOCK HAZARD
Dangerous high voltages are present. Unplug power cord.
5. Open the vent valve one turn counterclockwise with the Nitrogen flow on.
NOTE: Opening this valve more than one turn risks damage to the
equipment.
6. Listen for the turbomolecular pump to fully spin down, then wait one hour for
the trap to cool down.
7. Close the vent valve by turning it fully clockwise. Remove the nitrogen line.
Moving the Mass Spectrometer Away From the GC
1. Turn off the GC column oven and heater through the 3800 GC keyboard by
pressing the Column Oven button and the blue soft key labeled Turn Oven
Off.
WARNING:
SHOCK HAZARD
Dangerous high voltages are present. Unplug power cord.
2. Open the GC oven door. Make sure that about 30 cm (12 in.) of the mass-
spectrometer end of the capillary column is hanging freely and that the
column is not caught on the column rack or cage.
3. Check for sufficient lengths of pneumatics tubing at the back of the
instrument to move the spectrometer.
4. While keeping an eye on the capillary column in the GC oven, gently slide
the mass spectrometer away from the GC with the transfer line lined up with
the GC hole. As you slide the mass spectrometer, take care not to allow the
column to bind or kink. When you have fully withdrawn the mass
spectrometer from the GC, the distance separating them should be ~23 cm
(9 in.). The transfer line should be fully removed from the GC oven.
Removing the Analyzer Assembly
1. Move the mass spectrometer away from the GC.
2. Remove the top cover from the MS instrument by lifting it up.
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