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• The knurled nut
• The septum purge cap (septum head only)
• The connections for the carrier gas and sep-
tum purge (septum head only)
• The lower inlet seal at the bottom of the
inlet
• The inlet bottom cap
Valves
Replacing the Valve Box
The valve box sits on top of the 6850 GC and
contains the valves and plumbing, heated zones
and sensors, and the insulation.
1. Place the main power switch in the off posi-
tion.
Released: April 2004
2. Unplug the line power cord from its
3. Allow some time for the oven and heated
4. When the oven has cooled, turn off all gas
5. Switch the solenoid valve off so the actuator
6850 Series Gas Chromatograph Service Procedures
WARNING
Hazardous voltages are present in the instru-
ment when the power cord is connected.
Avoid a potentially dangerous shock hazard
by disconnecting the power cord before
working on the instrument.
receptacle.
zones to cool.
supplies.
is in its fully extended position (piston rod
extended as shown).
126
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