Campbell CPEC300, Product Manual, Page: 14 / 175

CPEC300/306/310 Closed-Path Eddy-Covariance Systems
5
4.1.4 Pump Module
All three CPEC systems use a small, low-power diaphragm pump to draw air
through the EC155 sample cell. The pumping speed is automatically controlled
to maintain the volumetric flow at the setpoint (3 to 9 LPM). The pump module
is temperature controlled to keep the pump in its operating temperature range
of 0 to 55 °C. The pump module includes a large-capacity filter to protect the
pump from contamination and dampen pressure fluctuations in the sample cell
that are caused by the pump.
Section 4.2 , CPEC300
(p. 5)
; Section 4.3 , CPEC306
(p. 7)
; and Section 4.4 ,
CPEC310
(p. 10)
, below describe each of the individual systems in greater detail.
4.2 CPEC300
The CPEC300 is the most compact of the three systems, yet has the core
capabilities provided by the EC100 controlling the EC155 and CSAT3A, and
the measurement and control capabilities of the CR6 datalogger.
A typical configuration of the CPEC300 is shown in FIGURE 4-4 .
The CPEC300 comes with two system enclosures: the CPEC300 enclosure
which houses the EC100 electronics and the CR6 datalogger (see FIGURE 4-5
and FIGURE 4-6 ; and the CPEC300 pump module enclosure which houses the
system pump (see FIGURE 4-7 ).
FIGURE 4-4. CPEC300 system