1 Installing the GC
46 Installation and First Startup
Step 14 Vent ECD or uncombusted hydrogen to a
fume hood
If using a ECD, or if using hydrogen carrier gas that will be uncombusted, you must either
safely vent the exhaust or operate the GC inside a fume hood. For example, if using hydrogen
carrier gas the GC would vent uncombusted hydrogen from a thermal conductivity detector
(TCD) and from the inlet split vent and septum purge vent.
The ECD exhaust vents through a coiled tube. Connect tubing from the tube fitting at the end
of this tubing to an exhaust hood via a hole in the back panel.
For a TCD, you must supply vent tubing and fittings to connect to the detector exhaust tube on
the top of the detector. Route the tubing out the back of the GC, following the same path as for
the ECD vent tubing.
The other detectors (FID and FPD) combust any hydrogen carrier gas.
ECD vent
tubing hole
H
2
connections
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