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Jun 2001
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Programmed Temperature Vaporization Inlet (PTV) 240
Replacement procedures
WARNING Turn off the oven and the interface and allow them to cool. Turn off all flows
at the initial gas supply. Then turn off the main power switch and unplug the
power cord.
2. Remove the top cover, the inlet fan cover, the inlet cover, the left side
panel, the top rear panel, the pneumatics chassis cover.
3. Remove the column.
4. Loosen the three captive Torx screws which secure the inlet to the oven,
and lift the PTV inlet out of the oven.
Caution When removing/attaching the inlet cryo line, use one wrench to support the
cryo line fitting on the inlet body and one to tighten the nut. Failure to do
this could break the fitting on the inlet.
Figure 240-11 Removing the gas lines from the inlet
5. Disconnect the carrier gas line to the inlet at the inlet. Remove the split
vent gas line, and the septum purge line (as applicable). Using two
wrenches, remove the cryo fitting from the inlet.
Remove gas
lines
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