Campbell Scientific AP200 CO2/H2O Atmospheric Profile System - Manual (Page 13)

AP200 CO
2
/H
2
O Atmospheric Profile
System
1. Introduction
The AP200 CO
2
/H
2
O Atmospheric Profile System (AP200) measures
atmospheric carbon dioxide and water vapor at up to eight positions. Intake
assemblies are normally spaced along the height of a tower to enable
measurement of a vertical profile. The AP200 is commonly used in
conjunction with an eddy-covariance system to measure the storage term to
give a more complete measurement of the surface exchange.
Before using the AP200, please study:
• Section 2, Cautionary Statements
• Section 3, Initial Inspection
• Section 5, Installation
Operational instructions critical to preserving accurate measurements of the
system are found throughout this manual. Before using the AP200, please
study the entire manual. Several other user manuals provide additional
information and should be consulted before using the AP200. These include:
• CR1000 Measurement and Control System Operator’s Manual
• CFM100 CompactFlash ® Module Instruction Manual
• NL115 Ethernet and CompactFlash ® Module Instruction Manual
• Application Note 3SM-F, CF Card Information
• ENC10/12, ENC12/14, ENC14/16, ENC16/18 Instruction Manual
• CM106 Tripod Instruction Manual
• Tripod Installation Manual Models CM110, CM115, CM120
• Model 107 Temperature Probe Instruction Manual
all available at www.campbellsci.com , and
• LI-840A CO
2
/H
2
O Gas Analyzer Instruction Manual
available at www.licor.com
2. Cautionary Statements
• WARNING:
o The AP200 can be damaged by unfiltered air being pulled into the
sampling sub system. To avoid this, each inlet must be capped or
have a particulate filter installed before applying power to the
system. Use care when connecting and disconnecting intake
assembly tubes, and zero and span tubes (see Section 5.2,
Plumbing) to avoid introducing dust or other contaminates.
o Do not overtighten the Swagelok ® fittings on the sampling system
or intake assemblies. See Appendix H, Using Swagelok ® Fittings,
for information on proper connection.
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