Connector Maintenance Guidelines - Gemini 720is Product Manual

Hardware Installation & Configuration

Connector Maintenance Guidelines

Mating surfaces should be lubricated with 3M Silicone Spray or equivalent, DO NOT
GREASE. Connectors must be lubricated on a regular basis. Lubricate O-rings with Dow
Corning #111 Valve Lubricant or equivalent. O-rings can be seriously degraded if exposed to
direct sunlight or high ozone levels for extended periods of time. Clean plugs and receptacles
with soap and fresh water.
Ground Fault Monitoring
The power supply within the Gemini includes an electrically isolated DC-DC converter front-
end. There is a small capacitive connection between the isolated ground and the sonar
chassis which should not noticeably affect any impressed current ground fault indicator (GFI)
equipment.
Power
Document: 0703-SOM-00002, Issue: 1
Caution
If required, ensure that o-rings have been fitted correctly to cables and blanking
caps before use. O-rings should be inspected and replaced as part of a regular
maintenance programme. Frequency will depend on usage.
When attaching a connector make sure that both connector and socket are
completely dry. Any water trapped in the connection could result in an electrical
short.
If the Gemini has two ports then the unused connector must have a blanking cap
fitted prior to immersing in water. Failure to do this will cause permanent damage.
If using alcohol or IPA to clean out the connector take care that it does not come
into contact with any other part of the sonar. If an O-ring is present it should be
first removed and discarded and the new O-ring only inserted after the IPA has
evaporated.
Caution
Never try to make the Gemini work down a long cable by increasing the PSU
output voltage above 75V DC.
Caution
Power should only be supplied to the Gemini through the MAIN port. The AUX
port power is supplied via an internal regulator.
Warning
The Gemini PSU that is supplied with the Gemini system is intended for INDOOR
USE ONLY and should not be placed in a position where it could get wet.
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Gemini 720is Imaging Sonar
© Tritech International Ltd.