User manual

Table Of Contents
IMPORTANT
The relief valve will open automatically if dangerously high internal pressure is created by
battery out-gassing. Take appropriate precautions when opening the housing after recovery.
CTD
The Current Temperature Depth Sensor (CTD) is connected to and powered from the
controller housing. Figure 2-11 shows the FSI CTD, which slides in and out through a fitted hole
in the front plate and is secured by a pinch bracket. The single cap screw that secures the CTD in
the bracket can be reached through the small hole in the left side of the MMP (the left side skin
can also be removed). The CTD and ACM connectors are physically (and electrically) identical,
so the cables and connectors are color coded to avoid confusion (deploying with incorrectly
connected cables could prevent data collection).
Sensor orientation is important to ensure the correct water flow path. Mount the CTD as
shown in Figure 2-11, with the flow path through the inductive conductivity cell vertically
oriented and the oil-filled pressure compensation bladder on the left, away from the mooring
cable.
Figure 2-11: CTD Orientation
Compensation bladder
orientation
Conductivity cell
orientation
2-8