Campbell Scientific AP200 CO2/H2O Atmospheric Profile System - Manual (Page 40)

AP200 CO
2
/H
2
O Atmospheric Profile System
5.3.2 Intake Heater Cables
The AP200 intake assemblies have a small heater in the rain diverter to prevent
condensation. Power for these heaters is available in the AP200 system
enclosure. Campbell Scientific pn 9922 cable or equivalent is recommended
for connecting the intake assemblies to the system enclosure. The system is
designed to daisy-chain the heater cables from one intake assembly to the next
as described below and shown in FIGURE 5-16.
Make sure power is disconnected from the AP200 before
connecting the heater cable.
To bring cables into the AP200 enclosure, remove the cap from the cable
feedthrough by loosening the thumbscrew and twisting the cap while pulling it
off. See FIGURE 5-11.
FIGURE 5-11. Cable feedthrough cap shown removed to admit cables
into the system enclosure
Insert the heater cable through the feedthrough, and connect it to the DIN rail
bus in the system enclosure. The red, positive wire connects to one of the
terminals labeled Intake Heater +. Connect the black, negative wire to one of
the terminals labeled G, as shown in FIGURE 5-12. Two connections are
provided for convenience if multiple cables are to be connected (for example, if
the intake assemblies are mounted on two separate towers).
NOTE
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