Routine Maintenance: Inlets
Maintaining a PTV
Released: March 2004 6850 Series II GC User Information page 150 of 256
Maintaining a PTV
Inlet adapters
The GRAPHPACK-2M connector (the inlet adapter) at the bottom of the inlet is
sized to the column diameter. When a different diameter column is to be
installed, the adapter must be changed.
The adapter number is stamped on the side of the adapters. Select the smallest
hole diameter that will accept the column. See Table 29 for part numbers.
Table 29. PTV Inlet Adapters
To replace the inlet adapter
1. Load the SERVICE method or reset the inlet and oven temperatures to
OFF or turn the main power switch off. Let the heated zones cool to room
temperature. Also, make sure that:
• If you have entered parameters that you do not want to lose, store
them as a method
• If the detector is on, turn it off.
2. Unscrew the column nut from the adapter. Remove the nut and the
column from the inlet.
3. With a 6-mm wrench, remove the inlet adapter, being careful not to lose
the silver seal inside. Save the adapter for later use.
Column id Inlet adapter number Quantity Part no.
200 µm 31 1 5182-9754
250 µm 45 1 5182-9761
320 µm 45 1 5182-9761
530 µm 70 1 5182-9762
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