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Air inlet and outlet
On the left side of the front plate the air inlet and the air outlet are located.
Figure 8: Air inlet with adapter for diffusion mode (left
picture) and for flow mode (just for
AlphaGUARD DF2000, right picture)
6.3.1 Diffusion mode
In diffusion mode the diffusion adapter is mounted which is equipped with a grid.
The diffusion adapter allows an optimal air exchange and covers the filter which is
located in front of the measurement chamber. The air outlet is not used in this
mode.
6.3.2 Flow mode
In flow mode,
the flow through adapter has to be mounted. The flow through
adapter consists of an aluminium screw cap equipped with a tube nozzle for quick
coupling system (diameter: 2,7 mm) which allows the connection of plastic tubes
with inner diameters of 5/32" resp. 4 mm. The air outlet is provided with a tube
nozzle too, e.g. to set up a closed cycle.
To mount the flow-through adapter the following steps have to be effected at the
DF2000:
x Remove the diffusion adapter from the air inlet (can be unscrewed by
hand)
x Screw in the flow-through adapter (screw cap with tube nozzle)
- The filter paper must not be touched. High risk of damage!
- Make sure that the O
ring within the screw cap is correctly positioned.
- Tighten the screw cap carefully by hand using the hexagon spanner.
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