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Jun 2001
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Programmed Temperature Vaporization Inlet (PTV) 240
Replacement procedures
4. Lift the filter trap from the mounting bracket and unscrew the filter trap
assembly.
5. Remove the old filter and O-rings and replace them.
6. Reassemble the trap.
Replacing the inlet adapter
The Graphpack–2M connector (the inlet adapter) at the bottom of the inlet is
sized to the column diameter. When installing a different diameter column,
change the adapter.
The adapter number is stamped on the side of the adapters. Select the smallest
hole diameter that will accept the column.
1. Unscrew the column nut from the adapter. Remove the nut and the
column from the inlet.
2. With a 6 mm wrench, remove the inlet adapter, being careful not to lose
the silver seal inside. Save the adapter for later use.
3. Select the appropriate inlet adapter for the column to be installed. Insert
a new silver seal (part no. 5182-9763, package of five) into the adapter
and screw the adapter onto the inlet fingertight. Tighten the adapter an
additional 1/16 to 1/8 turn.
Be careful not to overtighten the adapter. The inlet can be damaged if the
adapter is forced. If the adapter leaks, check the silver seal and replace
it if necessary.
Column
ID
Inlet adapter
number
Quantity Part no.
200 mm 31 1 5182-9754
250 mm 45 1 5182-9761
320 mm 45 1 5182-9761
530 mm 70 1 5182-9762
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