MicronNav System
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© Tritech International Ltd.
9. Adding a Micron Echosounder
When operating the MicronNav System in Responder mode in conjunction with a
Tritech
International Ltd
Sonar, a Micron Echosounder can be added to the subsea installation. The
Micron Echosounder is a sonar ranging device which mounted vertically gives altitude above
the seabed or in any other attitude provides a subsea distance measurement (see Micron
Echosounder Product Manual for further details).
Connect the Micron Echosounder (“Main” port) to the MicronNav subsea Modem head (“Aux”
port) using a Double Ended Micron Interconnect cable available from Tritech.
The Micron Echosounder requires a voltage of +9 to +50V DC and will draw approximately
1.72W when running (typical current will be 225mA @9v or 72mA @ 24V), as the Micron
Echosounder takes its power from the MicronNav subsea Modem head which is ‘daisy
chained’ with the Tritech Sonar head consideration must be given to the overall power
requirement.
The Micron Echosounder (“Main” port) communications should be configured to RS232 at a
baud rate of 9600Bd to match that of the Modem head (“Aux” port). The Micron Echosounder
Main port is factory configured at time of supply, if this needs to be changed then contact
Tritech for details.
Installation Notes:
• The connector sockets are not usable “open face” and should always be sealed with the
blanking-plug provided if not being used.
• Care should be taken when mating the connector, with either a plug or a blanking-plug, to
ensure both mating ends are clean and dry.
• Special attention should be given to checking the O-ring for dirt. The O-ring is located under
the lock-ring on both the plug and the blanking plug.
• When mating the connector, first locate the plug on its ‘D’ profile, push together as far as
possible and then tighten the lock-ring. The action of tightening the lock-ring draws the two
mating ends fully together.
• The connector lock-ring needs only to be finger tight. The use of any tools to tighten the
lock-ring further is not necessary and could result in damage to the connector.
When operating correctly the Micron Echosounder should be heard ‘ticking’ from the
transducer and a small digital readout should be displayed at the top of the Sonar display.
When operating in air this should display “50.000m” or “00.000m” depending on the “no-
echo” setting of the unit.
