NorthStar Navigation 491 Section TWO Installing the transducer, Safety considerations

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SECTION TWO — Installing the transducer

Safety considerations

WARNING!

Be sure to turn the power off before starting the installation. Further, it is highly recommended that you keep power off while you’re performing the installation. If power is left on or turned on during the installation, fire, electrical shock, or other seri- ous injury may occur.

Be sure to ground the equipment to prevent electri- cal shock and mutual interference.

Be sure the transducer outputs are tied together before handling to avoid electrical charge build-up.

WARNING! Be sure to use a 3-amp fuse. Using the incorrect fuse can result in fire or damage to the 491.

CAUTION!

Mounting the transducer requires drilling holes

 

through the hull; make sure the installation does

 

not cause the vessel to leak. A thru-hull installation

 

should be performed by a professional installer. Do

 

not attempt this unless you are fully qualified.

 

Do not perform a thru-hull installation of the trans-

 

ducer when the vessel is actually in the water.

 

Immediately after installing the transducer, be sure

 

to check for leaks, and don’t leave the vessel in the

 

water for more than three hours before checking it

 

again.

 

Northstar assumes no responsibility for improper

 

installation of a transducer.

 

 

 

 

NOTE:

Be sure that the transducer doesn’t interfere with

 

any of the on-board systems. Check all other sys-

 

tems to ensure that their performance doesn’t

 

degrade when the transducer is connected.

 

 

491 INSTALLATION MANUAL Revision A

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Contents Echo Sounder Installation Manual Page Table of Contents Page Welcome to the Northstar Section ONE IntroductionWho should read this manual Scope of this manual Installation considerations Safety considerations Section TWO Installing the transducerAirmar transducer elements Northstar-recommended transducersDo not mount the transducer Choosing a mounting locationHull thickness limits LWL Installing the transducerLWL Using anti-fouling paintDetail Cleaning a transducerPage Section Three Installing Section Three Installing Installation Manual Revision a Echo sounder system components with the Northstar 961/962 System components190 dia 360 dia MountingConnecting the 491 to the 961/962 WiringInterface cable connection from 961/962 to Cable connection between the 961/962Connecting the 491 to the 957/958 491-to-transducer connector pin wiring Connecting the 491 to a transducerTurning the 491 on Initial checkoutFor the 961/962 For the 957/958/6000i Installation test checklistSetting up the echo sounder Turning the 491 offStatus LED Section Four Troubleshooting and servicing961/962 echo sounder system troubleshooting 957/958/6000i echo sounder system troubleshooting Contacting Northstar Getting technical supportHearing from you Ordering replacement parts ServicingReturning a 491 for service 491 technical specifications Appendix a Technical specificationsON/OFF Cavitation Deadrise Echo sounder Fairing block Transducer GlossaryGlossary Installation Manual Revision a Index 491 Index Index Installation Manual Revision a