Replacement Procedures; Replacing The Inlet - Agilent Technologies 6890 Series Service Manual

Gas chromatograph

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Cool On-Column Inlet

Replacement procedures

Turn off the oven and turn off the inlet you are replacing and let them cool

down. Turn off the carrier gas supply pressure, then turn off the main power

switch and unplug the power cord.

From inside the oven, remove the column from the inlet fitting.

From the top of the 6890 GC, remove the blue inlet carrier cover (or the

tray bracket, if installed) and the left side cover.

Unclip the heater/sensor leads from the connector to the left of the inlet

Disconnect the inlet plumbing and reroute the plumbing from

underneath the tabs on the left side of the instrument.

EPC inlets: The inlet plumbing terminates in a pneumatics block

connected to the EPC flow manifold with one Torx T-10 screw.

Non-EPC inlets: The inlet plumbing is located in the manual inlet side

carrier. The tubing labelled "C" is connected to the Forward Pressure

Regulator. The line labelled "P" is connected to the septum purge

Agilent 6890 Gas Chromatograph Service Manual

6890a 6890 plus