Airmar TRIDUCER DST800 Owner's Manual

OWNER' S GUIDE
Retractable TRIDUCER
Model DST800
U.S. Patents: 4,898,029; Re-issue 33, 982; 6,904,798 B2.
Australian Patent 605,281.Canadian Patent 1,313,775. Japanese Patent 1851014
IMPORTANT : Please read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.
CAUTION : NEVER USE SOLVENTS!
Cleaners, fuel, paint, sealants, and other products may
contain strong solvents, such as acetone, which attack
many plastics greatly reducing their strength.

Applications

• Plastic housing recommended for fiberglass or metal hulls only.
Never install a plastic housing in a wood hull since swelling of
the wood may overstress the plastic causing a fracture.
• Bronze housing recommended for fiberglass or wood hulls.
Never mount a bronze housing in an aluminum hull because
electrolytic corrosion will occur.
• Stainless steel housing compatible with all hull materials.
Recommended for aluminum hulls to prevent electrolytic corrosion
provided the stainless steel housing is isolated from the metal hull .
• Never install a metal housing in a vessel with a positive ground
system.
Tools & Materials
Water-based antifouling paint ( MANDATORY IN SALT WATER )
Safety goggles
Dust mask
Electric drill with 10mm (3/8") or larger chuck capacity
Drill bit: 3mm or 1/8"
Hole saw: 51mm or 2"
57mm or 2-1/4"
Countersink tool (installing a flush housing)
Sandpaper
Mild household detergent or weak solvent (such as alcohol)
File (installation in a metal hull)
Marine sealant (suitable for below waterline)
Additional washer [for aluminum hull less than 6mm (1/4") thick]
Slip-joint pliers (installing a bronze housing)
Zip-ties
Installation in a cored fiberglass hull (see page 3):
Hole saw for hull interior: 60mm or 2-3/8"
Fiberglass cloth and resin
or Cylinder, wax, tape, and casting epoxy
Fairing
Caution : Never use a fairing with a plastic housing; the protruding
multisensor would be vulnerable to damage from impact.
® Multisensor
(plastic or bronze housing)
(stainless steel housing in a metal hull)
& INSTALLATION INSTRUCTIONS
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz

Pretest

Connect the multisensor to the instrument and spin the paddlewheel.
Check for a speed reading and the approximate air temperature.
If there are no readings or they are inaccurate, check all the
connections and repeat the test. If there are still no readings or they
are inaccurate, return the product to the place of purchase.

Antifouling Paint

Aquatic growth can accumulate rapidly on the multisensor's surface
reducing performance within weeks. Surfaces exposed to salt water
must be coated with antifouling paint. Use WATER-BASED
antifouling paint only. Never use ketone-based paint, since ketones
can attack many plastics possibly damaging the sensor.
It is easier to apply antifouling paint before installation, but allow
sufficient drying time.
Reapply paint every 6
months or at the
beginning of each boating
season. Paint the
following surfaces (see
Figure 1):
• Outside wall of the
insert below the lower
O-ring
• Paddlewheel cavity
• Paddlewheel
• Exposed end of the
insert
• Exterior lip of the
housing
• Bore of the housing up
30mm (1-1/4")
• Blanking plug below the
lower O-ring including
the exposed end
plastic
low profile
housing
insert
outside wall
below lower
O-ring
paddlewheel
cavity
paddlewheel
housing
exposed end
exterior lip
of housing
inside bore of
housing up 30mm (1-1/4")
Figure 1. Antifouling paint
Copyright © 2006 Airmar Technology Corp.