Cleaning The Septumless Head - Agilent Technologies 6890 Series Service Manual

Gas chromatograph

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Programmed Temperature Vaporization Inlet (PTV)

Replacement procedures

Figure 240-19

Reconnect the carrier gas line.

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.

Disconnect the carrier gas line and unscrew the head from the inlet.

Unscrew the sealing element from the head. Carefully remove the Viton

seal and the pressure spring. Do not use a sharp object to extract the

valve body—this can leave scratches that cause leaks.

Removing the carrier gas line

Agilent 6890 Gas Chromatograph Service Manual

6890a 6890 plus