Airmar M260 Owner's Manual & Installation Instructions

OWNER' S GUIDE
In-hull, Removable, Depth Transducer
Model M260
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.
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
Applications
• Fiberglass hulls only
• Recommended for high-speed boats
• Accommodates a deadrise angle up to 30°
Tools & Materials
Rope
Detergent or weak solvent (such as alcohol)
Safety goggles (some installations)
Dust mask (some installations)
Disk sander (some installations)
Thin sealable plastic bag (optional)
Twist-tie
Water-based lubricant (such as K-Y
Carpenter's level
Pencil
Saw
Scissors
Sand paper: 80 grit
Bonding material
Fiberglass resin approved brands:
Bondo 401
West Marine boaters resin (Model—1937762)
or Marine-Tex epoxy putty (14 oz. pack)
or 3M™ Marine Adhesive/Sealant 5200
Propylene glycol (non-toxic anti-freeze/coolant)
Zip ties
&
jelly) (optional)
®
INSTALLATION INSTRUCTIONS
Figure 1. Exploded view
Mounting Location
About Fiberglass Hulls
Caution : The fiberglass hull below the transducer must be solid.
Since the hull absorbs acoustic energy, transmitting through the hull
reduces the transducer's performance. Fiberglass hulls are often
cored in places for added strength or to reduce weight. These cored
areas contain balsa wood or structural foam which are poor sound
conductors. Do not locate the transducer over coring.
Choose a location:
• Where the fiberglass is solid (no air bubbles are trapped in the
fiberglass resin) and where no coring, flotation material, or
dead air space is sandwiched between the inside skin and outer
skin of the hull.
• Where the hull below the transducer will be in contact with the
water at all times.
• Where the water flowing across the hull is smoothest with a
minimum of bubbles and turbulence (especially at high speeds).
Caution : Do not mount the transducer near water intake or
discharge openings; or behind strakes, fittings, or hull
irregularities.
• Away from interference caused by power and radiation sources
such as: the propeller(s) and shaft(s), other machinery, other
echosounders, and other cables. The lower the noise level, the
higher the echosounder gain setting that can be used.
• Where the transducer beam will not be blocked by the keel or
propeller shaft(s).
• Where the deadrise angle does not exceed 30°.
• Where there is space inside the vessel for the size of the tank
and removing the transducer.
transducer
tank