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901-10037001/1.1 FS 20/25 Operators Manual
Page 4.10 FS 20/25 Installation, System Set-Up and Test
Kongsberg Simrad Mesotech Ltd.
Port Coquitlam, BC - Canada
Note!
Incorrect placement of the retaining rings and locating pin or the
guide bracket on the sonar head, or the failure to install these
parts, may result in movement of the sonar head that could
damage the transducer and/or drive shaft and result in water
damage to the entire unit.
Liberal amounts of Dow Corning #55 grease should be applied to all connector
surfaces before mating so that a water tight seal is obtained. The locking sleeve
should then be hand-tightened.
Note
Dow Corning #55 grease must be applied to all mating surfaces
of underwater connectors to insure proper sealing. Sufficient
grease should be applied so that excess squeezes out with any
air when the connectors are mated. RTV or any other sealant
must NOT be used, and when tightening the locking sleeves, do
NOT use a wrench or pliers! See chapter 5, "Troubleshooting
and Maintenance", for proper connector maintenance.
4.4 SYSTEM SET-UP AND TESTING USING TEST CABLE
Initial power-up, set-up and test of system should be made with the trawl unit, in the
wheel house, connected to the PWR/TTM module using the supplied test cable.
The 3-pin MS connector of the test cable is attached to the connector labelled
“Trawl Cable” on the rear panel of the PWR/TTM unit. The other end of the test
cable is plugged into the 2-pin connector on the sonar head of the trawl unit.
4.4.1 Start Up
1. Check that the system has been properly installed and that all connections have
been made to the PWR/TTM, and the HP/PC processing unit.
2. First turn on the PWR/TTM interface module. The voltmeter should display
approximately 112 volts if on “FS 20” setting, 200 volts if on “FS 25”: setting and
approximately 56 volts if on “TEST” setting. The current meter should read
approximately 0.15 – 0.7 amps if everything is okay.
3. Next turn on the display monitor, and then turn on the HP/PC. The system will
start up automatically.
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