Reson SeaBat 7125 SV2, Operator'S Manual

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SAFETY PRECAUTIONS
SeaBat 7125 SV2 Operator‟s Manual
Page 10 July 25, 2011
Version 3
2.3 Corrosion Avoidance
It is important that your SeaBat™ system be properly protected from the corrosive
effects of the water in which the sonar head is submerged.
WARNING!
Aluminum components of your SeaBat system are not suitable for permanent
installations on surface vessels. Aluminum components require regular cleaning with
fresh water and sacrificial anodes must be inspected/renewed on a regular basis.
All aluminum housings are provided with
zinc alloy sacrificial anodes to protect against
galvanic corrosion while immersed in sea water , or with magnesium anodes for use in
fresh water .
Take the following precautions to ensure the best usage of your SeaBat system
‟s
sacrificial anodes.
Maintain electrical isolation between the sonar head and the mounting
structure.
Do not paint the anodes.
Inspect the anodes periodically for cleanliness and good physical condition.
Tighten or replace loose anodes immediately.
WARNING!
Sacrificial anodes, when new, have a thin coating to prevent them from oxidizing. The
first time the anodes come in contact with water the coating will dissolve thereby
making the anodes active. If the anodes are removed from the water, even for a short
period of time, they will oxidize (in a matter of minutes) forming a layer that must be
removed before the anodes and sonar head are placed in the water again.
2.4 Electrical Isolation
Electrical isolation for both titanium and aluminum components may be achieved by
using nonconductive bushings, washers, and isolation plates to insulate them from the
mounting brackets. Common nonconductive materials include Delrin, G-10/FR4 glass
fiber sheets, and high-density polyethylene sheets.
WARNING!
If the sonar head is not isolated from the mounting structure, galvanic corrosion will
result in either the housing (aluminum housings) or in the mounting structure itself
(titanium housings).
Additionally, an undue amount of stress will be put on the affected sacrificial anodes,
causing them to be used very quickly.
NOTE
Contact RESON for additional information on schemes for electrical isolation.