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5
Micro GC Channels
Carrier Gas
Carrier Gas
The Micro GC is configured for use with either He and H
Agilent recommends you use gases with a minimum purity of 99.999 %. Since the injection valve
is operated pneumatically, there is a limit of 550 kPa ±10 kPa (80 psi ±1.5 psi) to the main gas
supply.
Your Micro GC is configured either for carrier gas He and H
C AU T I O N
type for which your instrument is configured, otherwise the detector filaments can be damaged.
Gas clean unit
(optional)
Carrier gas
Figure 25.
Gas flow diagram
62
Dynamic
electronic gas
control (DEGC)
Sample in
or N
and Ar.
2
2
or N
2
Columns
(analytical and
reference)
Injector
Agilent 990 Micro GC User Manual
and Ar. Use the carrier gas
2
µTCD
Reference vent
Column vent
Sample out
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