USER MANUAL | ICOS | INSTRUCTIONS | UM/ICOS-EN REV. B.2
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Plumbing Diagram for the GLA431-AAQC
For standard operation, the internal pump draws gas through the Sample Inlet port (1/4”
Swagelok) on the back panel of the analyzer. The gas travels through a low flow orifice and
is filtered through a Teflon Membrane filter. The gas then travels through the optical cell
and is exhausted through the Internal Pump Exhaust port (1/4” Swagelok).
Figure 7 shows the plumbing diagram for the GLA431-AAQC.
Figure 7: Plumbing diagram for the GLA431-AAQC
Optional Fast Flow Mode
Analyzers with fast flow capabilities (external pump on/internal pump off) measure data at
a higher flow rate.
Cap the
Internal Pump Exhaust port with the provided ¼” Swagelok cap
during Fast-Flow operation.