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4. Gas Cooler
Exhaust gas with a temperature above the steam dew point (35 -
65 °C) is introduced into a long spiralling gas path with a surface
coated metal body with good thermal conductivity. The gas radiates
its heat to this metal body. A Peltier element (semi-conductor cooling
element) powered by a continuous current is thermally connected
with this body and with a second metal body with cooling ribs and
ventilation slots.
The flow thru the Peltier element creates a heat transfer from
WARM to COLD, drains the heat of the metal body flown by gas and
conveys it to the outer cooling body. This heat is conveyed to the
surrounding air with the aid of a fan.
The condensation formed by the heat loss of the gas drops in a re-
ceptacle and is pumped out automatically via a peristaltic pump.
On battery operation alone, the Peltier cooler can be switched off
to save battery power. In the Gas Analysis menu press <Enter>,
select Peltier I/0 and press <Enter>. To switch the Peltier cooler
back on, repeat these steps.
