Campbell Scientific CPEC200 Closed-Path Eddy-Covariance System - Manual (Page 105)

Appendix H. CPEC200 Pump
Replacement
H.1 Introduction
A properly maintained CPEC200 system will exceed the lifetime of the
system’s pump. This section provides step-by-step instructions for the user to
replace the system pump (pn 26402), rather than needing to return the pump
enclosure to Campbell for replacement.
H.2 Removal
To remove a CPEC200 pump, carry out the following steps:
1. Place the pump module on a horizontal surface.
It is very difficult to replace the pump if the module is mounted
vertically on a tower.
2. Remove the four, #10 self-sealing screws that hold the filter assembly
within the CPEC200 pump module enclosure (see FIGURE H-1). If
these screws become lost or damaged, replace them with pn 26412.
FIGURE H-1. Four screws holding filter assembly inside CPEC200
pump module enclosure
3. Stand the filter up in the enclosure and remove the tubing from the
filter inlet by loosening the nut with an 11/16” wrench. Remove the
tubing from the outlet of the filter by loosening the nut with a 9/16”
wrench (FIGURE H-2).
The filter cartridge in the pump module is unlikely to clog over
the lifetime of the CPEC200 system. If the filter holder or
cartridge become damaged, however, the replacement parts are pn
26407 (filter holder) and pn 26408 (filter cartridge).
NOTE
NOTE
H-1