Campbell Scientific CPEC200 Closed-Path Eddy-Covariance System - Manual (Page 28)

CPEC200 Closed-Path Eddy-Covariance System
• Small, flat-tip screwdriver (included with EC100 and CPEC200)
• Large, flat-tip screwdriver (included with EC100)
• Sledgehammer (to drive grounding rod into the ground)
• 3/16-in hex-key wrench (included with CM250 leveling mount)
5.1 Mounting
5.1.1 Support Structure
The CPEC200 system has four major components that must be mounted to a
user-provided support structure. The support structure itself is not included in
the CPEC200 so that it can be tailored to specific needs, but several options are
available. Contact a Campbell Scientific applications engineer for more
information on site-specific mounting options.
EC sensors (EC155 and CSAT3A): Mounted on a horizontal round pipe of
3.33 cm (1.31 in) outer diameter, such as the CM20X crossarm.
EC100 electronics: Mounted within 3.0 m (10 ft) of the EC sensors. The
EC100 mounting bracket will accommodate a pipe at any orientation, with
outer diameter from 2.5 cm to 4.8 cm (1.0 in to 1.9 in).
CPEC200 enclosure: Mounted where it can be accessed easily to retrieve data
from the CF cards on the datalogger. The CPEC200 enclosure is similar to the
ENC16/18, with the same mounting options (tower, tripod, leg, or pole).
CPEC200 pump module: Mounted within 3.0 m (10 ft) of the CPEC200
enclosure. The pump module enclosure is similar to the ENC10/12, with the
same mounting options (tower, tripod, leg, or pole).
Consult the ENC10/12, ENC12/14, ENC14/16, ENC16/18 Instruction Manual,
available at www.campbellsci.com , for details on mounting bracket options.
The following sections describe a typical application using a CM110 tripod and
CM202 crossarm. The CPEC200 enclosure and the CPEC200 pump module
are shown with the leg-mount options. The CM110 tripod and the leg
mounting options, shown in FIGURE 5-1, are ideal for a low EC measurement
height to minimize wind disturbance.
5.1.2 Mount Enclosures
Mount the EC100 electronics within 3.0 m (10 ft) of the EC sensors (this
measurement corresponds to the length of the cables on the EC155 and the
CSAT3A).
The EC100 should be mounted vertically to prevent water ingress
from precipitation.
The mounting bracket will accommodate a horizontal, vertical, or angled pipe
from 2.5 cm to 4.8 cm (1.0 in to 1.9 in) diameter. See the EC155 user manual
for details on configuring the EC100 mounting bracket. The EC100 electronics
are shown mounted on one leg of a CM110 tripod in FIGURE 5-1.
Mount the CPEC200 enclosure and the CPEC200 pump module within 3.0 m
(10 ft) distance. The enclosure and pump module are shown mounted back-to-
NOTE
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