Teleflex TFX128, Operation Manual

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5
D
EPTH
R
ANGE
. The depth range is
shown to the right of the screen. The
upper number is 0 indicating the
transducer position. The lower
number is one of the nine depth
ranges available that best match the
depth of the water. As the depth of
the water changes, the range changes
as necessary in order to retain a
bottom representation on-screen.
When in Auto mode, the horizontal
line at the top of the screen is the
“zero line,” representing the
transducer location. Occasionally
there is a gap in this line. This gap
indicates the unit is updating the
display even if the bottom is not
visible on-screen, or if the bottom information is not changing.
New sonar information appears on the right side of the graphic area of
the display and moves to the left as
new information is displayed. The
128 can automatically select the
appropriate depth range to show
the depth of water beneath the
transducer. This range is selected so
the bottom representation is typically
shown about
²⁄₃
down the display.
B
OTTOM
. The graphic depiction of
the bottom provides an effective tool
for understanding the composition
of the bottom. If the bottom is hard
and smooth, the bottom depiction is
narrow and dense. If the bottom is
soft mud or sand, the depiction will
be thick and less dense. This
indicates much of the signal is
USING THE 128 SERIES
WHAT YOU SEE ON-SCREEN
Water Depth
Bottom Depiction
Depth Range
Figure B
Zero Line
Rocky Bottom
Soft Bottom Hard Bottom