Kongsberg EA 600 Instruction Manual page 55

Note
857-164688 / E
Most Kongsberg Maritime transducers are delivered with 20 m
cable. Excess cable can be cut off, or an extension cable can be
added. This is possible because all Kongsberg Maritime
transducers have a built-in transformer for tuning and matching
to the cable impedance of 75 Ohms.
Do not lift the transducer by the cable.
Some transducers are delivered with a cover plate on the face
for protection during transport. Let this plate stay on as long as
possible, but do not forget to remove it before the vessel goes
into the sea.
An anti-fouling paint may be applied to the transducer face.
Because some paint types may be aggressive to the polyurethane
in the transducer face, please consult Kongsberg Maritime's list
of approved paints on the next page.
Arctic tanks have acoustic windows made of polycarbonate.
These must neither be painted nor cleaned with chemicals.
During dry docking of the vessel, the transducer face may be
cleaned for shells and other marine fouling. Be careful not to
make cuts in the transducer face. Use a piece of wood or a very
fine grade emery paper.
Transducer installation
45