Routine Checks; Cleaning - Raymarine DSM400 Installation Manual

items of equipment, i.e. ensure optimum Electromagnetic
Compatibility (EMC).
• Always report any EMC related problem to a Raymarine
dealer. Such information is used to improve quality
standards.
• In some instances it may not be possible to prevent the
equipment from being affected by external influences. In
general this will not damage the equipment but can lead to
spurious resetting action, or may result in momentary faulty
operation

Routine checks

The DSM400 Digital Sounder Module is a sealed unit.
Maintenance is therefore limited to the following periodic checks:
• Examine all of the cables for signs of damage, such as
chafing, cuts or nicks.
• Check that all cable connectors are firmly attached.

Cleaning

Cleaning the unit
The sounder module is a sealed unit and does not require
regular cleaning. If it necessary to clean the unit, follow these
basic procedures:
• Ensure the power is set to OFF.
• Wipe the module using a damp cloth.
• If necessary, use isopropyl alcohol (IPA) or a mild detergent
to remove grease marks.
Cleaning the transducer
Sea growth can collect quickly on the bottom of the transducer
which can reduce its performance in just a few weeks. To
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prevent the build-up of sea growth, coat the transducer with a
thin layer of paint.
Use only water-based antifouling paint, or a water-based paint
specifically designed for transducers. Apply the paint with a
brush.
If the transducer becomes fouled or stops working because of
sea growth or sand, use a stiff brush to clean it. The surface can
also be sanded with a fine-grit wet or dry sandpaper (#320 grade
or finer), but this will affect the performance of the unit when the
boat is moving at higher speeds.
The paddle wheel mechanism may become jammed by dirt, grit
or barnacles. Work the contaminant out of the mechanism, then
clean the unit with soap and water or IPA.
Cleaning the hull
Take care when cleaning the outside of the hull near the
transducer as harsh cleaning solvents such as acetone may
damage the transducer.
Raymarine DSM400 Digital Sounder Module