Heater/Sensor Assembly Replacement; Reinstalling The Inlet - Agilent Technologies 6890 Series Service Manual

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Heater/sensor assembly replacement

Follow the Removing the inlet procedure described previously in this

Remove both the bottom reducing nut (1/2-inch) and the larger thermal

nut (3/4-inch) from the bottom of the inlet. Be careful not to lose the

lower inlet seal and thrust washer inside the reducing nut.

You may want to use a vise to hold the heat sink when removing the thermal

Slide the aluminum heat sink off of the inlet weldment.

Remove the Torx T-20 screw and washer from the top of the heat sink

and slide the heater/sensor elements out of the heat sink.

Replace the heater/sensor assembly, being careful not to damage the

sensor. Replace the washer/T-20 screw and reassemble the rest of the

Make sure the heater/sensor assembly is installed and the inlet insulation

sleeve is in place.

Install a column nut and blank ferrule on the bottom of the inlet to prevent

insulation contamination, and place the inlet into the inlet carrier.

Make sure the insulation is properly seated around the inlet and that the

heater/sensor wiring harness insulation sleeve is tucked under the top inlet

Retighten the three screws (Torx T-20) to secure the top inlet weldment

plate to the inlet carrier.

Reconnect the split vent flow line.

Agilent 6890 Gas Chromatograph Service Manual

Split/Splitless Inlet

Replacement procedures

6890a 6890 plus