NorthStar Navigation NorthStar 491 manual Maintaining a transducer

transducer. The models below can be purchased from Northstar.

Table 3: Northstar-recommended transducers

Manufacturer	Model	Power	Northstar P/N
Airmar	B260	1 kW	TD1004
Airmar	B744V	600 W	TD1005
	(w/3-wire speed)
Airmar	P66	600 W	TD1006

Airmar Technology Corporation may be reached at 35 Meadowbrook Drive, Milford, New Hampshire 03055-4613; phone 603/673-9570; fax 603/673-4624.

NOTE:

Detailed information on maintaining and troubleshooting a trans- ducer is outside the scope of this manual. Refer to the transducer manufacturer’s documentation. Do not return a transducer to North- star. If you need to return a transducer for service, contact the man- ufacturer directly for instructions.

Maintaining a transducer

Do not expose a transducer to gasoline or clean it with strong solvents. These can penetrate and degrade the housing. If a transducer will be exposed to saltwater, coat it with anti-fouling paint to prevent sea growth. To clean a transducer of sand, debris, or sea growth, use a stiff brush or putty knife. Use sanding sparingly, as repeated sanding may affect a transducer’s performance at high speeds. If necessary, wet sand with finer grade wet or dry paper. Check the transducer periodically.

Page 66 491 Echo Sounder Operations Manual