NorthStar Navigation Echo Sounder NorthStar 491 - Manual (Page 70)

Page 66 491 Echo Sounder Operations Manual
transducer. The models below can be purchased from
Northstar.
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.
Table 3: Northstar-recommended transducers
Manufacturer Model Power Northstar P/N
Airmar B260 1 kW TD1004
Airmar B744V
(w/3-wire speed) 600 W TD1005
Airmar P66 600 W TD1006