September
2017
Sentinel V SC and RT Operation Manual
Page 102
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Disassembly and Assembly Procedures
This section explains how to remove and replace the end-cap or transducer head to gain access to the Sen-
tinel V electronics, batteries and digital recorder.
Training videos are available on https://www.youtube.com/user/mlnewcombe.
Disassembling the Sentinel V
If the ADCP was just recovered from a deployment, use caution when removing the end-cap or transducer
head. If the system leaked, water may be inside the housing and under pressure. To avoid any possible in-
jury always loosen the four bolts to allow any internal pressure to be vented from the system.
Caution label on End-Cap
Wear safety glasses and keep head and body clear of the end-cap while opening. Any
system that was deployed may have pressure inside the housing.
Removing the End-Cap
To remove the end-cap:
1. Dry the outside of the Sentinel V ADCP.
2. Disconnect the I/O cable and install the dummy plug (for systems with an end-cap connector).
3. Lay the Sentinel V ADCP on its side on a soft pad.
4. Inspect the end cap bolts for any signs of damage such as bending, stretched bolts, crushed or de-
formed housing captive nuts, etc. These signs may indicate that there is internal pressure inside
the system.
5. Using a 4mm Hex Key, loosen each of the M5 captured bolts (counterclockwise) until the O-ring
seal is released.
6. Allow the system the opportunity to vent while the bolts are loose.
To avoid any possible injury ALWAYS loosen the four end-cap bolts to allow any internal
pressure to be vented from the system
.
7. Once any possible over-pressure has been released, completely loosen the four M5 retaining bolts.
The end-cap hardware will stay attached to the end-cap.
A lanyard connects the end-cap to the housing. This protects the internal I/O cable from
being pulled too far away from the Sentinel V ADCP.
8. Carefully lift the end-cap away from the housing. Observe how the internal I/O cable is coiled in-
side the housing. It must be coiled it the same way when replacing the end-cap.
CAUTION
Contents May be
Under Pressure.
Refer to Operator’s
Manual Prior to
Servicing.
90Z-6038-00
