September
2017
Sentinel V SC and RT Operation Manual
Page 90
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Using a Sea Chest
Table 4.
Underneath Vessel Mounting of a Sentinel V20/V50 ADCP
DIMENSION LETTER
OPTION 1
MINIMUM DIMENSION
OPTION 2
MAXIMUM DIMENSION
A
179.8mm
186.1mm
C
8
204.4mm
215.1mm
D
8
255mm
265mm
Special Notes:
1.
No liability is assumed by RD Instruments for users using this conceptual well drawing. Users realize that this drawing is provided as
a basis for the user to construct their own well. It is expected that the user will have their well design inspected and approved by a
naval architect.
2.
The top plate of the well is intended as the primary seal for the vessel. The window and transducer can provide additional seal, but
should not be considered the primary sealing mechanism for the vessel.
3.
The listed minimum and maximum dimensions are recommendations based on maintaining the clearance for the transducer as well
as providing the smallest well possible. Transducer dimensions should be confirmed before building well.
4.
The gasket material between the adapter plate and the vessel flange should be used that will both seal and provide electrical isola-
tion between the transducer housing and the vessel flange. Typical gasket material used is silicone rubber 3-6.35mm thick.
5.
Inserts in the transducer housing mounting holes may be used to provide additional isolation from vessel.
6.
The walls of the well should be coated with a material to absorb reflected sound in the well. Material such as 3mm wet suit mate-
rial glued to the inside well walls is satisfactory for this purpose.
7.
Vent and fill pipes should be above the water line of the vessel and it is recommended that a gate valve be installed to seal off these
pipes.
8.
Window thickness should not exceed 9.5 mm of Polycarbonate material. Thinner Polycarbonate window is OK.
9.
Window faces should be at an angle of 20 d/-2 degrees to all of the transducer faces degree for best performance should
never /-5 degrees.
