Kongsberg EM 712, Maintenance Manual

Page: 38 / 232

38
451106/B
Painting the transducer face
Marine growth (biological fouling) on the transducer face reduces the EM 712
performance. We recommend that you paint the transducer face immediately after
installation, and then again as often as required to maintain the protection.
Prerequisites
The following tools and consumables are required.
• Personal protection
• Fresh water
• A mild synthetic detergent and a plastic brush
• Fine-grade sandpaper (240 inch grit size)
• Primer
• Anti-fouling paint
• Wet film gauge
• Airless spray
Because some paint types may be aggressive to the polyurethane in the transducer,
consult our list of approved paints.
Context
The transducer has not been designed with any protection against biological fouling.
Anti-fouling paint may therefore be applied to the transducer face. To minimize the
negative acoustical effects the layer of anti-fouling paint must be as thin as possible.
Note
The anti-fouling paint will reduce the acoustical performance of the transducer. The
surface roughness of the transducer substrate and the thickness of the paint may also
influence the performance. Kongsberg Maritime cannot be held responsible for any
negative consequences of the anti-fouling paint.
Observe the relevant instructions and safety information provided by the paint
manufacturer.
Procedure
1 Clean the transducer thoroughly.
Make sure that you remove all oil grease residues, as well as salt and other
contamination.
2 Allow the transducer surface to dry.
Kongsberg EM 712 Maintenance Manual