Routine Maintenance: Inlets
Maintaining a PTV
Released: March 2004 6850 Series II GC User Information page 152 of 256
4. Screw the new head onto the inlet. Tighten it 1/8-turn past finger tight.
5. Reconnect the carrier gas line.
6. Check all connections on the sampling head for leaks. If necessary, tighten
them again by hand.
Cleaning the septumless head
Minor deposits from sample mixtures can collect in the head. Dust and abraded
material particles can enter together with the syringe needle, eventually
causing leaks. We recommend periodic cleaning.
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. Disconnect the carrier gas line and unscrew the head from the inlet.
Carrier gas connection
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