Maintenance; After Using Sonar; If Storing The Sonar For Extended Periods; Regular Maintenance - Gemini 720i Product Manual

8. Maintenance

8.1. After using Sonar

Make sure that after using the sonar head that it is washed down with fresh water and check
the unit for any signs of obvious damage. Pay particular attention to the transducer head and
free any organic matter which has become trapped. Once the unit is clean; dry thoroughly
and place in storage container.

8.2. If storing the sonar for extended periods

Make sure that the sonar is completely dry (if necessary leave to dry in air before stowing).
Pack into storage container along with several pouches of silica gel.

8.3. Regular maintenance

Although the Gemini range is not field serviceable regular care and maintenance of the unit
should be carried out. Ensuring that the electrical connectors are clean and free of corrosion
will aid in preserving the working lifespan of the unit. Particular care should be taken for units
that use an o-ring seal on the connectors and blanking caps to ensure that these o-rings are
seated properly.
Regular visual inspection of the unit around the areas where salt build up can occur will help
highlight any potential issues of corrosion and allow for corrective action to be undertaken
before any integrity failure of the unit. The areas around the Transmitter and Receiver array
should be inspected, as well as the VOS sensor. The mechanical interface between the
bulkhead connectors and housing elements should also be inspected.
It is recommended that Gemini units be returned to Tritech as part of a regular maintenance
schedule. An annual return is highly recommended, but this can be lengthened, or shortened,
by various factors:
• Frequency of use
• The operating environment (i.e. salinity, temperature)
• The presence of any galvanic action from dissimilar metals, or case voltages
Document: 0685-SOM-00001, Issue: 11
Caution
It is essential to have a regular maintenance schedule so that any defects arising
from corrosion or erosion can be spotted early and corrected before they cause
severe damage to the unit. It is recommended that the unit is annually serviced
and can be returned to Tritech International Ltd for this purpose.
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Gemini Imaging Sonar
© Tritech International Ltd.