Kongsberg EM 712 Maintenance Manual page 37

Biological material which is strongly rooted in the substrate can be removed
carefully with a piece of wood or plastic.
If required, you can also use citric acid. Apply, leave it working for several hours,
and rinse thoroughly with fresh water.
Note
Do not use high-pressure water, sandblasting, metal tools or strong solvents to
clean the transducer face.
Do not damage the outer protective skin of the transducer face.
3 Allow the transducer surface to dry.
4 Do a thorough visual inspection of the transducer. Check for dents, scratches,
holes or other damage to the surface.
If you suspect damage, take a high resolution photo. Contact your dealer or the
Kongsberg support organization for advice.
5 Apply anti-fouling paint as described in the dedicated procedure.
Note
Because some paint types may be aggressive to the polyurethane in the transducer,
consult our list of approved paints.
The list can also be found on Kongsberg Maritime
berg.com/maritime/).
451106/B
Preventive maintenance
(https://www.kongs-
37