NorthStar Navigation 491 instruction

491 ECHO SOUNDER

INSTALLATION MANUAL

Rev A

Part Number GM495

Northstar	www.NorthstarNav.com
a unit of Brunswick New Technologies Marine Electronics	www.NorthstarNav.com
30 Sudbury Road	Service: 978/897-6600
Acton, Massachusetts 01720	Sales: 800/628-4487

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NorthStar Navigation 491 installation manual Echo Sounder Installation Manual

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 transducer Airmar transducer elements Northstar-recommended transducers Do not mount the transducer Choosing a mounting location Hull thickness limits LWL Installing the transducer LWL Using anti-fouling paint Detail Cleaning a transducerPage Section Three Installing Section Three Installing Installation Manual Revision a Echo sounder system components with the Northstar 961/962 System components 190 dia 360 dia Mounting Connecting the 491 to the 961/962 Wiring Interface cable connection from 961/962 to Cable connection between the 961/962 Connecting the 491 to the 957/958 491-to-transducer connector pin wiring Connecting the 491 to a transducer Turning the 491 on Initial checkoutFor the 961/962 Setting up the echo sounder Installation test checklistTurning the 491 off For the 957/958/6000i Status LED Section Four Troubleshooting and servicing 961/962 echo sounder system troubleshooting 957/958/6000i echo sounder system troubleshooting Contacting Northstar Getting technical support Hearing from you Ordering replacement parts Servicing Returning a 491 for service 491 technical speciﬁcations Appendix a Technical speciﬁcations ON/OFF Cavitation Deadrise Echo sounder Fairing block Transducer Glossary Glossary Installation Manual Revision a Index 491 Index Index Installation Manual Revision a