Campbell Scientific CPEC200 Closed-Path Eddy-Covariance System - Manual (Page 31)

CPEC200 Closed-Path Eddy-Covariance System
5.2 Plumbing
FIGURE 5-4 shows the basic plumbing configuration of a CPEC200 including
the cylinders required for zero and span operations.
FIGURE 5-4. Plumbing connections
5.2.1 Pump Module
Connect the EC155 to the pump module, see FIGURE 5-5. If the EC155 is
within 15 m (50 ft) of the pump module, 3/8-in OD tubing, such as pn 26506,
is recommended. For longer distances of up to 150 m (500 ft), a 1/2-in OD
tube (pn 25539) is recommended to minimize pressure drop in the tube.
The fittings on the EC155 and the pump module are sized for 3/8-
in OD tubing. A reducer is required at each end for the larger
tubing size. Campbell Scientific supplies pre-swaged pump tube
assemblies pn 26503-L (1/2-in OD), with reducers at each end for
this purpose.
Connect one end of the pump tube to the fitting labeled Pump on the back of
the EC155 analyzer. Connect the other end to the fitting labeled Inlet on the
CPEC200 pump module as shown in FIGURE 5-5.
NOTE
Zero Air Tubing
Pump Tubing
Pump Module Cable
CO
2
Span Gas
Tubing
Analyzer Tubing
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