Replacing The Makeup Gas Adapter - Agilent Technologies 6890 Series Service Manual

Gas chromatograph

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Electron Capture Detector (ECD)

Replacement procedures

Replacing the makeup gas adapter

After removing the ECD detector from the GC, you can further disassemble

it to replace the makeup gas adapter. The makeup gas adapter consists of a

line from the detector pneumatics manifold that carries makeup gas to a

weldment that screws into the bottom of the ECD detector. From there, the

makeup gas sweeps past the end of the column and carries the column effluent

into the ECD cell.

Remove the detector as described in the Replacing the entire detector/

detector cell procedure in this section.

Remove the Torx T-20 screw holding the pneumatics block(s) to the

detector manifold.

There are two pneumatics blocks on the EPC version of the ECD pneumatics

manifold. The outside block is the anode purge gas line and the inside block

is the makeup gas line.

Slide the makeup gas adapter up and out of the GC.

When reinstalling the makeup gas adapter, ensure the following:

Approximately 6 inches of the makeup gas line should reside in the

oven after installation.

The makeup gas line should be bent into a coil that loops around the

bottom of the detector weldment and makeup gas adapter.

Agilent 6890 Gas Chromatograph Service Manual

6890a 6890 plus