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WIRING
Connect the wires as shown in the diagram on the next page. The 3500
operates from 10 to 15 vdc (12-volt system). You can connect the wires
as shown in the diagram at the top of the page using two accessory
switches (not included), which switches the unit's lights on separately
from the power, or you can wire the lights to the power switch as shown
at the bottom of the page. (The white wire on the power cable is con-
nected to the lights.) Regardless of which wiring method you use, the
3500 must be wired to a 3-amp fuse! Failure to fuse this product will void
the warranty and could result in damage to the unit or your boat.
The unit won't be harmed if the power wires are connected backwards,
however, it won't work until they're properly connected.
Find a location for the speaker that is protected from the elements, but
still lets you hear it. The typical mounting location is behind the dash.
Make certain to wire the speaker's wires to the same color wires on the
3500's speaker cable - red to red and black to black. If the 3500's wires
won't reach the speaker, splice ordinary speaker wire to them.
TRANSDUCER
The 3500 can use any Lowrance 192 kHz transducer with gray connec-
tors. For the best performance, we recommend a transducer with a nar-
row (8°) cone angle. See your transducer owner's manual for installation
instructions.
OPERATION
Since the 3500 is an automatic sonar, all you have to do is turn it's power
on. It will give you a water depth reading within seconds. Once it finds the
bottom, the 3500 locks onto it and automatically adjusts the sensitivity
and noise suppression circuits. It will track the bottom at speeds over 70
m.p.h..
Feet/Meters
You can view the water depth in feet or meters. When the 3500 is first
turned on, the depth is in feet. To change it to meters, simply press the
left arrow key. To switch back to feet, press the left arrow key again. The
display shows the depth in tenths of a foot when the water depth is below
100 feet. It shows the depth in tenths of a meter below 100 meters. The
letters "FT" or "M" appear at the bottom of the display, depending if the
unit is in feet (FT) or meters (M).
If the 3500 loses the bottom signal for any reason, it flashes the last
known water depth until it reacquires the bottom signal.
