Hardware Installation & Configuration; Installing The Sonar Head; Electrical & Communication Notes - Gemini 720i Product Manual

3. Hardware Installation & Configuration

3.1. Installing the Sonar Head

The transducer should be mounted with the transmitter element on the bottom. The transmit
and receive elements are internally angled down at 10° which should be taken into account
when mounting the Sonar.
For the 720i there are 4 tapped M5 holes (10mm deep) on the top surface that are to be
used for mounting the sonar.
Any metallic clamps should be electrically insulated from the sonar body by either rubber or
plastic strips or mounting brackets of at least 3 mm thickness and extending at least 3 mm
beyond the clamp boundary to reduce any galvanic corrosion effect. Non-metallic clamps are
preferable; if metallic clamps are used (especially if they are not aluminium) they should be
painted or lacquered with at least two or three coatings.
1. Sound Velocity Probe
2. Receiver Elements
3. Transmitter Elements
3.2. Electrical & Communication Notes
Either an Ethernet or VDSL cable whip is supplied with the appropriate connector fitted to one
end. The other end should be terminated with a suitable connector for the user application.
Document: 0685-SOM-00001, Issue: 11
Caution
Although the sonar head is rugged, it should be handled with care, particularly
the connector and receiver/transmitter elements. It is strongly recommended that
a substantial guard is fitted over the sonar to protect the transducer from impact
damage.
Caution
Any alloy containing copper such as brasses or bronze should be avoided
because they will severely corrode the aluminium body.
15
Gemini Imaging Sonar
© Tritech International Ltd.