Gemini 720is Imaging Sonar
Document: 0703-SOM-00002, Issue: 7
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© Tritech International Ltd.
3. Hardware Installation & Configuration
Caution
Although the sonar head is rugged, it should be handled with care, particularly
the connector and receiver/transmitter elements. The plastic guard fitted to the
unit will not be able to protect the sonar against significant impacts.
3.1. Installing the Sonar Head
The sonar should be mounted with the transmitter element on the top. The transmit and
receive elements are internally angled down at 10° which should be taken into account when
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 different in composition to the
material used by the sonar) they should be painted or lacquered with at least two or three
coatings.
Caution
When deploying the aluminium version of the Gemini 720is, alloys containing
copper such as brasses or bronze should be avoided.
1. Sound Velocity Probe
2. Transmitter Elements
3. Receiver Elements
3.2. Electrical & Communication Notes
A cable whip supporting either Ethernet or VDSL communications can be supplied. The other
end of this cable whip should be terminated with a suitable connector for the user application.
