Always use a high-quality pressure regulator, that can be set with the required precision, for
both gases.
Figure 12.2 Pressure regulator
If MAW
®
is equipped with a gas mixer, connect CO
2
gas to the CO
2
inlet and N
2
gas to the N
2
inlet with a suitable tube. If MAW
®
is not equipped with a gas mixer, connect the premixed
gas only to the inlet marked “CO2”. Make sure the tube is fastened with a clip, so that it does
not accidentally loosen itself during a sudden pressure fluctuation. Use the supplied 0.2µ
HEPA filter on the gas line just before the inlet on MAW
®
. Notice the flow direction marked
on the filter.
Figure 12.3 Gas filter
The gas flow may be controlled digitally with the use of keys on the tabletop. If MAW
®
is
equipped with a gas mixer, the system will control the gas flow automatically. The user will
have to set the required gas setpoint (SP).
The gas will pass through the humidification flask.
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