Raymarine DSM250, Owner'S Handbook Manual

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7-2 DSM250 Digital Sounder Module
Cleaning the Transducer
Sea growth can collect quickly on the bottom of the transducer,
this can reduce the performance in just a few weeks. To prevent
the build-up of sea growth, coat the transducer with a thin layer of
paint.
Use only a water-based antifouling paint, or a water-based paint
specifically designed for transducers. Apply the paint with a
brush.
If your transducer becomes fouled or stops working because of
sand or sea growth, use a stiff brush to clean it. You may sand the
surface 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 alcohol.
Cleaning the Hull
Use caution when sanding or cleaning the outside of the hull near
the transducer.
WARNING:
Harsh cleaning solvents such as acetone may damage the
transducer.
EMC Servicing and Safety Guidelines
• Raymarine equipment should be serviced only by authorized
Raymarine service technicians. They will ensure that service pro-
cedures and replacement parts used will not affect performance.
There are no user serviceable parts in any Raymarine product.
• Some products generate high voltages, so never handle the
cables/connectors when power is being supplied to the equip-
ment.
• When powered up, all electrical equipment produces electromag-
netic fields. These can cause adjacent pieces of electrical equip-
ment to interact with one another, with a consequent adverse
effect on operation.