E8500 Instruction & Operations Manual
version 1.010
Page 17 of 45
NO
2
and SO
2
are gases that are highly soluble in water. To prevent significant loss of
NO
2
and SO
2
during transport of the sample from the probe to the analyzer, the
following conditions must be satisfied:
1. Rapid sample transport. This is accomplished by maintaining a high flow rate
using a relatively small diameter sampling line.
2. Preferably use of a sample line made from a highly hydrophobic material, such
as Teflon, Viton or stainless steel.
3. Minimum contact of the gas sample with the water collection mechanism and
also no additional condensation to occur following the thermoelectric chiller. This
is accomplished by using a specially designed Peltier cooled manifold to
separate the gas from the water.
The entire conditioning system is located inside the drawer compartment of the
analyzer.
You can open the drawer compartment to access the conditioning system by pulling on
the black knob that is located on the right side of the instrument front above the
temperature connectors.
The following figure shows the drawer compartment containing the sample conditioning
apparatus:
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