
Most fish dont
spawn
unless the
water
temperature
is
within rather
narrow limits.
To find
the
different
temperatures,
a surface
temperature
meter,
such as the
EDT-20 is a valuable aid
to
your
boat This unit
provides
an
extremely quick response
to
identifying
the
desired surface
water
spawning temperatures
for various
species.
Trout can't survive in
streams
that
get
too
warm;
bass and
other fish
eventually
die out
when
stocked in lakes that
remain too cold
during
the summer. While
some fish
have a
wider
temperature
tolerance than
others,
each has a
certain
range
within
which it tries to
stay.
Schooling
fish
suspended
over
deep
water lie at the
level that
provides
this
temperature
in
which,
we
assume,
they
are the most
comfortable.
The
temperature
of
water in the lake is
seldom constant from
top
to
bottom.
Layers
of
different
temperatures form,
and the
junction
of a
warm
and
cool
layer
of water
is oalled a
thermoclirie. The
depth
and thickness
of the thermocline
can
vary
with the
season or time of
day.
In
deep
lakes
there
may
be two or
more at
different
depths.
Thermoclines are
important
to fishermen
because
they
are areas where fish
are active.
Many
times
bait fish
wilFbe above the
thermocline while
larger game
fish
will
suspend
in or
just
below it.
The Z-6100 can
detect
this
invisible
layer
in the
water,
but the
sensitivity
will
probably
have to
be turned
up
to see
it
INTRODUCTION
When the Z-6100
Liquid Crystal Graph
(LCG)
is turned
on,
it
will
automatically
find and
display
the bottom
signal
and other
targets.
As the
depth
of the
bottom
changes,
the Z-@100 will
automatically change
the
range
and
sensitivity
to
always keep
the
boffom
signal
on the
display.
If
desired,
the
only
key
that needs to be
touched is the ON
key. Howeve
the
automatic mode can be disabled
which allows the Z-6100 to be
manually adjusted.
The Z-6100 is
nitrogen
filled
and sealed for
complete waterproof
protection.
The
liquid crystal
display
and
keyboard
are
lacklighted
for
easy
use at
night, plus
it's covered
by
a full one
year warranty
which
includes
all
parts
and labor for one
year
from the date of
purchase.
To
get
started with
your Z-610p,
first read the
installation section. This
is where it all
begins,
and
improper
installation can
cause
problems
down the road.
After
you've
read
these instructions and installed
your
Z-6100,
read
the rest of this manual
in detail. The more
you
know
when
you get
to
the
water,
the more
your
Z-6100 will do
for
you.
I
WSTALLATI ON
Mounting
The
Z-6100 can be installed in
any
convenient
location,
provided
there
is
clearance when tilted for
the best
viewing angle.
Holes in the bracket
base allow woed screw
or
through
bolt
mounting.
The bracket can be
aftached to aluminum
panels
with sheet metal sdrews.
However,
we
suggest placing
a
piece
of
plywood
on the back of thin
fiberglass panels
to
secure the
mounting
hardware. Make
certain there is
enough
room
behind the unit to
attach the
power
and
transducer cables.
A 1½"
hole in the base of the
gimbal
bracket allows the
power
and
transducer
cables to be routed
straight
down
through
the
mounting
surface.
The smallest
hole that will
pass
the
transducer connector
through
is
3%" This will allow
the transducer
connector and cable to
be
passed up
through
the
hole and
gimbal bracket
then the
power
cable
wire can
be
pushed
DOWN
through
the bracket and
dash. After the
cables
have been
routed,
the hole
may
be
filled with silicone
rubber
adhesive
(RTV),
or the bracket can
be offset so that the
majority
of the
hole is covered.
21
2
I'll"
AUTO.
III ..
ILl
TI-IERMOCLINE
Simulated
Pictures
Figure
17
U.S
HO
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