Filter
Top Products
L'U
-.
-
Figure
20
END-OF-PAPER
MARKER
The
graph paper
in the X-15B
has a red
line
printed
at the
bot-
tom of
the
paper
to
signify
when
there is
only
2
to 3 feet before
the
end of the
paper.
ZERO ADJUST
Occasionally,
when
changing
the
stylus
or
stylus belt,
the
zero
line
does not
print
at the
same
place
near
the
top
of the
chart
paper.
A zero
adjust
control has been
placed
on the
back inside wall
of
the X-158 near
the
upper
left
hand
corner so
that the zero line's
position
may
be
adjusted
on
the
paper.
Open
the case front
and look
for the decal marked
"ZERO AD-
JUST".
You
may
have to
pull
the
paper
transport
assembly
down to
see the
decal for the
first time,
Push the
transport
closed
and turn
on the unit.
(Caution
—
Keep
hands
away
from the
stylus
belt
and
stylus.
High voltage
is
present.)
Insert a 6"-8"
long
screwdriver
with a /" blade into
the zero ad-
just
hole and rotate
the control on
the circuit board until
the zero line
is at the
desired
position. (Note:
This
may
also be
adjusted
with
the
unit turned OFF
Adjust
the
control,
then remove the
screw-
driver
and turn
power
back ON.
Repeat
until the
zero line is in
the
desired
position.)
IV
HOW TO
READ
GRAPHS
"Arched
Signatures"
A
remarkable
advantage
of
the
X-15B is that it. can
record
indi-
vidual fish with a
characteristic
arched
mark that
separates
them
from
their
stationary surroundings.
The
reason for
this is shown
be-
low.
The distance
to a fish when it
moves into the
sQnar's cone of
sound is shown as "A".
When the fish has
moved to
the center of the
cone,
the dis-
tance
to t will be
shorter,
(line
"B"),
and as it moves
out of the
cone,
the distance will
increase
again
as shown
in line "C".
0—
10
—
20
—
SO
—
4°
—
50—
60
—
Figure
22
If
a
partial
arch
occurs most of
the
time on
your unit,
(the
mark
curves
up,
but
not back
down,
or
vice-versa)
it is
because the trans-
ducer
is not
pointed
straight
down,
If
your
transducer
is mounted on
the
transom,
adjust
the
transducer
until the fish show
the distinctive
arched
sighature.
This
may
take
some trial
and error
until the cor-
rect
mounting
is achieved.
Sharp,
well defined
signatures
will
occur most often
when the
Sensitivity
knob is set at
the ¾
point,
or
higher. Remember,
that
there
must be some
movement
between
the boat and
the fish to
develop
the arched
mark.
Usually
this
means
trolling
at
very
slow
speeds
with the main
engine
in
gear
at
minimum
throttle
setting.
THERMOCLINES
The
temperature
of water
in the
lake is
seldom
constant from
top
to
bottom.
Layers
of
different tem-
peratures
form,
and the
junction
of
a warm and cool
layer
of water
is
called a thermoclino.
The
depth
and
thickness of the
thermocline
can
vary
with the seaspn
or time
of
day1
In
deep
lakes
there
may
be
two or
more,
at
different
depths.
Thermoclines are
import-
ant
to the fisherman
because
they
are areas where
fish are active.
Many
times bait fish will be
above
the
thermocline while
larger
game
fish
suspend
just
below it.
Your
Lowrance X-153 can
de-
tect this
invisible
layer
in.tho
water,
but the
Sensitivity
knob will
probably
have
to be set at the
1/2
point,
or
higher.
PAPER LOADING
CAUtION
—
High
voltage
is
pre-
snt in the
electronic section
when the unit is
turned on.
-1,
TURN
THE UNIT
OFF.
2. Release both
catches on the
top
of the
case. Pull out and
down on the
top
of the case
front to
expose
the
platen
as'
sembly. (See
Figure
23.)
3.
Move the
stylus
belt
DOWN,
to
position
the
marking stylus
on
the back side of
the
pla-
ten. NEVER move the
belt
up
—
the
stylu
may
be.
damaged. (See
Figure
24.)
PECIAL
NOTE: The
stylus
may
be
damaged
if
.the
platen.
assembly
is
pulled
down un-
less the
stylus
has been
moved to
the back side of
the
platen.
Figure
21
10
11
PDF compression, OCR, web-optimization with CVISION's PdfCompressor