Campbell Scientific AP200 CO2/H2O Atmospheric Profile System - Manual (Page 32)

AP200 CO
2
/H
2
O Atmospheric Profile System
4.3.3 Intake Assembly
Dimensions: 27.9 cm x 12.5 cm x 19.0 cm (11.0 in x 5.0
in x 7.5 in)
Weight: 1.4 kg (3.1 lb)
Filter: 1.0 in diameter, inline PTFE membrane
filter, 3 micron pore size, CSI pn 29998
Orifice: 0.007-in inside diameter
Heater: 560 ohms (0.25 W at 12Vdc)
Mixing volume: 750 ml
Sample connection: 0.25-in Swagelok ®
Heater cable entry seals
Number of connections: 3 (one in, and up to two out)
Cable diameter: 2.8 mm to 6.6 mm (0.11 in to 0.26 in)
Heater cable screw terminals
Wire diameter: 26 to 12 AWG
Wire stripping length: 5.0 mm (0.2 in)
Screw tightening torque: 0.4 Newton meter (N • m)
5. Installation
The following tools are required to install the AP200 system in the field.
Additional tools may be required for a user-supplied tripod or tower.
• 9/16-in open-end wrench
• Adjustable wrench
• Tubing cutter (included with AP200)
• Small, flat-tip screwdriver (included with AP200)
• Wire stripping tool
5.1 Mounting
5.1.1 Support Structure
The AP200 system has two types of components that must be mounted to a
support structure: the intake assemblies and the AP200 system enclosure. The
support structure itself is not included in the AP200 so that it can be tailored to
specific needs, but several options are available. Contact a Campbell Scientific
application engineer for more information on site-specific mounting options.
The following installation notes show a typical application using a UT30
tower.
The AP200 intake assemblies are designed to mount on a vertical pipe of 1.3-
cm to 5.1-cm (0.5-in to 2.0-in) diameter. They should be mounted at the
positions where the air is to be sampled.
The AP200 system enclosure should be mounted where it can be accessed
easily to retrieve data from the CF cards on the datalogger. The AP200 can be
configured with one of these mounting options, similar to the standard
ENC16/18 enclosure:
• Triangular tower (UT10, UT20, or UT30)
• Tripod mast (1.5-in to 1.9-in diameter)
• Tripod leg (CM106 or CM106K tripod only)
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