Airmar 1 kW—TM258 Long Bracket - Manual

17-299-01 re
v.
04
09/06
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.
Transom Mount
1kW Depth Transducer
with Release Bracket
Models: TM258
Applications
• Sport fishing vessels
•
Not recommended for high-speed inboard powerboats
• No t recommended for stepped HULLS
• Good operation up to 30kn (35MPH)
• Bracket protects the transducer from frontal impact
only
Tools & Materials
Pencil
Straight edge
Safety goggles
Dust mask
Saw (some installations)
File (some installations)
Sandpaper (some installations)
Wrench: 3/8"
Electric drill
Drill bits:
Bracket holes 4mm, #23, or 9/64"
Transom hole (optional) 18mm, 11/16", or 3/4"
21mm or 13/16" ( Furuno, Raymarine only)
Cable clamp holes 3mm or 1/8"
Masking tape
Marine sealant (suitable for below waterline)
Screwdrivers
Stainless steel bolts, nuts, and washers (2 each)
6mm or 1/4"
Zip-ties
Water-based antifouling paint (
MANDATORY IN SALT WATER )
Mounting Location
General Guidelines
• The transducer must be submerged in smooth water. Do not
mount the transducer in an area of turbulence or bubbles: near
water intake or discharge openings; behind strakes, struts,
fittings, or hull irregularities. To identify an area of smooth water,
observe the flow off the transom while the boat is underway.
• Mounting on the side of the transom where the propeller blades
are rotating downward is preferred (see Figure 1).
• Mount the bracket above the waterline to minimize the build up
of marine growth. It may be desirable to mount the bracket
farther from the keel than recommended in Figure 1.
• Mount the transducer as close to the centerline of the boat as
possible to ensure the transducer’s face remains in the water
when the boat is turning. However, keep in mind that it should
be a minimum of 15 cm (6") beyond the swing radius of the
propeller, so the water passing over the transducer does not
cause a flow disturbance to the propeller.
• Allow enough headroom above the bracket for the transducer to
be raised into the “up” position and the “released” position (see
Figure 2). If there is too little headroom, the support tube must
be shortened (see “Shortening the Support Tube” on page 2).
“Up” position —The bracket is factory preset to provide a
vertical travel of 77mm (3") between the “up” and “down”
positions. The vertical travel can be adjusted by moving the
lower latch pin to another set of adjustment holes. With the lower
latch pin in the bottommost set of holes, the support tube
requires 30cm (12") of headroom above the bracket in the “up”
position.
The upper latch pin must be inserted through the
topmost holes of the support tube for the transducer to release.
“Released” position —The transducer makes an arc of 110
°
.
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
IMPORTANT : Please read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.
INSTALLATION INSTRUCTIONS OWNER’S GUIDE &
Copyright © 2005 Airmar Technology Corp.
Figure 2. Positions
“up” “down” “released”
Figure 1. Mounting location on single drive boat
15cm (6")
minimum beyond
swing radius
hull projection:
0-3mm (0-1/8")
transducer
face
parallel to
waterline
in “down”
position
sensor
shown
Copyright © 2005 Airmar Technology Corp.