Campbell Scientific AP200 CO2/H2O Atmospheric Profile System - Manual (Page 35)

AP200 CO
2
/H
2
O Atmospheric Profile System
FIGURE 5-3. Mounting clip orientation for pipe diameters between 3.9
and 5.1 cm
FIGURE 5-4. Installation of AP200 assembly on a small-diameter pipe
(left) and large-diameter pipe (right)
5.2 Plumbing
5.2.1 Profile Sample Tubes
A sample tube must be used to bring the air sample from each intake assembly
to the AP200 system enclosure. Campbell Scientific pn 15702 or equivalent is
recommended. This tubing has an aluminum layer to minimize diffusion
through the wall of the tube. See Appendix H, Using Swagelok ® Fittings, for
important information.
The AP200 has eleven inlets, labeled 1 through 8, Zero, CO
2
Span, and H
2
O
Span, and one outlet labeled Exhaust. All connections are 0.25-in Swagelok ®
fittings mounted on the bottom of the enclosure, as shown in FIGURE 5-5.
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