the next shallower scale. You may manually change the range by depressing the depth
“set” button. Each time this button is depressed, the range is decreased by one setting.
Note: Should you attempt to change to a depth scale which is less than the
actual bottom depth, the computer will automatically change the depth scale
back to the proper position. For example, if you are in 40 feet of water and
you change the depth scale to 30 feet, the computer will automatically change
back to the 60 foot scale.
In the
Manual Mode
(See Paragraph 5 below) the automatic range change
is not active. This means that you must manually set the depth scale. For
example, if you are on the 0-30 foot scale and the bottom goes from 25 feet to
35 feet, you would press the depth set button four times to go from 0-30 to 0-
480 to 0-240 to 0-120 to 0-60 foot scale. The bottom would then be displayed
at 35 feet.
The depth range is always displayed at the bottom of the LCR display.
The LCR3000 has five depth ranges, 0-30’, 0-60’, and 0-120’, 0-240’ and 0-
480’. The graduated depth scales down the left and right side of the display
will identify the proper depth based upon the range you are on at the time.
Remember that because of the LCR3000’s Total Screen Update feature, information is
automatically being put into memory in smaller increments (pieces) than is being displayed on the
normal depth scales (see explanation of Total Screen Update earlier in manual). This means, for
example, that even though you are on the 0 to 480 ft. scale, when you change to the 0 to 30 ft. scale all
along. No information or resolution is lost.
3. Light: Depress the light “On/Off” switch to activate the display light for night
or low light conditions. The light is turned off by again depressing the
“On/Off” switch.
4. Set: The LCR3000 has two Set buttons labeled (upper arrow sign) (increase)
and (lower arrow sign) (decrease). These buttons are used to change four
functions:
1. Zoom Range
2. Manual Sensitivity Level
3. Alarm Depth Setting
4. Display Sweep Speed
Each of the buttons should be pressed and then the (upper arrow sign) or (lower arrow
sign) to increase or decrease the funtion.
5. Sensitivity:
Automatic Mode
- Each time the unit is turned on, the automatic
feature is on. In the automatic mode the sensitivity is adjusted automatically to
give a good return and the correct depth range is selected. The word Auto will
appear in the upper right hand corner of the display any time the unit is in the
automatic mode. The sensitivity bar at the top of the screen will increase or
decrease automatically indicating the amount of sensitivity being used. In
deeper water or soft bottom conditions this bar will increase indicating more
sensitivity. In shallow water or when a hard bottom is being read, the
sensitivity needed to achieve a good return will be less. Also in the automatic
mode, the unit will black out the display beneath the bottom line.
Manual Mode
-There are two ways of putting the LCR3000 in the
manual mode: (1) depress the Auto “On/Off” button or (2) depress
manual set and either the decrease (down arrow sign) or increase
(upper arrow sign) button. You will notice that the word “Auto” in the
upper right hand corner of the display has gone off. The operator can
control the amount of sensitivity by depressing the (lower arrow sign)
or (upper arrow sign) button. There are 15 sensitivity settings. When
the (lower arrow sign) or (upper arrow sign) button is pressed once, the
sensitivity settings at the top of the screen will change by one division.
If the (lower arrow sign) or (upper arrow sign) button is held down the
setting will move up or down as long as the button is held down. When
