Disassembly And Assembly Procedures; Disassembling The Sentinel V; Removing The End-Cap - Teledyne RD Instruments SENTINEL V SELF-CONTAINED Operation Manual

September 2017

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
Contents May be
Under Pressure.
Refer to Operator's
Manual Prior to
Servicing.
90Z-6038-00
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.
Page 102
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Caution label on End-Cap
Sentinel V SC and RT Operation Manual