Lowrance electronic LMS-350A User Manual
LMS-350A
INSTALLATION AND OPERATION
INSTRUCTIONS
IMPORTANT!
YOU MUST HAVE THE OPTIONAL LGC-1 GPS MODULE ATTACHED
TO THE LMS-350A TO USE THE POSITION AND NAVIGATION FEATURES ON THIS PRODUCT.
WARNING!
USE THIS PRODUCT ONLY AS AN AID TO NAVIGATION. A CAREFUL
NAVIGATOR NEVER RELIES ON ONLY ONE METHOD TO OBTAIN
POSITION INFORMATION.
CAUTION
The LGC-1 GPS receiver, (like all GPS navigation equipment) will show
the shortest, most direct path to a waypoint. It provides navigation data
to the waypoint regardless of obstructions. Therefore, the prudent
navigator will not only take advantage of all available navigation tools
when travelling to a waypoint, but will also visually check to make certain
a clear, safe path to the waypoint is always available.
NO TICE!
As of this writing, the Department of Defense (DOD) has not declared the
GPS navigation system operational. The system is still in a testing phase.
Satellites can be turned off or accuracy can be degraded at will by the
system operators. Remember that the LMS-350A, or any GPS receiver
is only as accurate as the system it’s using.
Copyright © 1993 Lowrance Electronics
All features and specifications subject to change without notice.
All screens in this manual are simulated.
All rights reserved.
SONAR TABLE OF CONTENTS
INTRODUCTION ............................................................................................................................ 1
MOUNTING .................................................................................................................................... 1
POWER CONNECTIONS ...............................................................................................................3
TRANSDUCER CONNECTIONS.................................................................................................... 4
OPTIONAL GPS MODULE INSTALLATION ................................................................................... 5
KEYBOARD BASICS ...................................................................................................................... 8
DISPLAY ......................................................................................................................................... 9
MENUS .......................................................................................................................................... 10
HELP .............................................................................................................................................. 10
WINDOWS ..................................................................................................................................... 10
VIEWING WINDOWS OPTIONS ............................................................................................... 12
MODIFYING GROUPS .............................................................................................................. 12
RESETTING ALL GROUPS ...................................................................................................... 13
SONAR OPERATION .................................................................................................................... 14
AUTOMATIC .................................................................................................................................. 14
SENSITIVITY ................................................................................................................................. 15
RANGE .......................................................................................................................................... 16
ZOOM - Automatic Operation ........................................................................................................17
ZOOM - Manual Operation............................................................................................................. 18
MENU - PAGE 1 ............................................................................................................................ 19
CHART SPEED ......................................................................................................................... 19
GRAYLINE® .............................................................................................................................. 19
FISH I.D. ....................................................................................................................................20
DISPLAY CONTRAST ...............................................................................................................21
ALARMS ....................................................................................................................................22
FISH ALARM ..........................................................................................................................22
DEPTH ALARMS ....................................................................................................................23
ZONE ALARM ........................................................................................................................24
SONAR FREQUENCY ................................................................................................................... 25
DUAL FREQUENCY OPERATION ............................................................................................ 26
MENU - PAGE 2 ............................................................................................................................ 27
ADJUST BACK LIGHT LEVEL................................................................................................... 27
BACK LIGHT ON/OFF ...............................................................................................................27
SPEAKER VOLUME ..................................................................................................................27
TURN DIGITAL BOX OFF ......................................................................................................... 28
CONSTRUCT DIGITAL BOX ..................................................................................................... 28
MENU - PAGE 3 ............................................................................................................................ 29
DISPLAY ZOOM BAR ................................................................................................................29
DISPLAY ZONE BAR.................................................................................................................29
DIGITAL SONAR ....................................................................................................................... 30
TURN ALL SONAR OFF ........................................................................................................... 30
CHART CURSOR...................................................................................................................... 30
MENU - PAGE 4 ............................................................................................................................ 30
FASTRAK ........................................................................................................................ ..........31
SELECT UNITS OF MEASURE................................................................................................. 31
CLEAR DISTANCE LOG ........................................................................................................... 32
DEPTH LINES ........................................................................................................................... 32
MENU - PAGE 5 ............................................................................................................................ 33
ADJUST CHART SURFACE CLARITY ..................................................................................... 33
ADVANCED SIGNAL PROCESSING (ASP).............................................................................. 34
SYSTEM INFORMATION .......................................................................................................... 34
PRESET SONAR AND GPS ...................................................................................................... 35
MENU - PAGE 6 ............................................................................................................................ 35
ADJUST KEEL OFFSET............................................................................................................ 35
CALIBRATE SPEED ..................................................................................................................36
BATTERY BACKUP ................................................................................................................... 37
TRANSDUCERS AND CONE ANGLES......................................................................................... 38
FISH ARCHES ............................................................................................................................... 39
SONAR TROUBLESHOOTING ..................................................................................................... 40
WINDOWS GROUP SUMMARY.................................................................................................... 44
WINDOWS SUMMARY ..................................................................................................................47
INTRODUCTION
The LMS-350A is a high quality, wide screen sonar with performance that
is second to none in its class. Using menu features and “soft-key”
operation, the LMS-350A is also one of the easiest-to-use sonars that
Lowrance has ever built. The wide “ClearVision” screen shows the
underwater world with high resolution and detail. The display and keyboard
are also lighted for night operation. The LMS-350A also has digital depth,
boat speed, surface water temperature, and distance travelled (log)
displays (requires an optional ST-T speed/temperature sensor).
If you purchase and install a LGC-1 GPS module, the LMS-350A can show
position and navigation information. Utilizing Rockwell's NavCoreV
technology, this GPS receiver is second to none in it's class.
MOUNTING - Bracket Mount
The LMS-350A can be mounted on it's gimbal bracket or in-dash mounted.
Brackets are supplied for both configurations, however if the dash is
thicker than 1/2", a special bracket will have to be purchased to mount the
unit in the dash. You can install the LMS-350A on its bracket in any
convenient location, provided there is clearance behind the unit when it is
tilted for the best viewing angle. Holes in the bracket base allow wood
screw or through-bolt mounting. You may need to place 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.
FRONT
SLOT BREAK
OUT SLOT
You will need to drill a hole in the dash for the power and transducer cables.
The smallest hole that will pass one power or transducer plug is one inch.
After the hole is drilled, pass the transducer connector up through the hole
first, then pass the power cable down through it.
After the cables have been routed, fill the hole with a good marine sealing
compound. Offset the bracket to cover the hole. Route the power cable
through the slot and break out one of the other slots in the bracket for the
transducer cable.
1
IN-DASH MOUNTING
The LMS-350A can be installed in the dash with the supplied hardware if
the dash is 1/2" thick or less. Determining the dash thickness can be
difficult, however, if you remove a gauge from the dash, you can easilly
measure the thickness. Try this in an area that's close to the location that
you wish to install the unit, since the thickness can vary significantly in
some boats. Make certain there is clearance behind the dash for the unit
and there is enough room to tighten the bolts on both sides of the unit.
7.625"
DASH CUTOUT
.400" radius
(4 places)
5.375"
Once you've determined the location for the unit, cut the hole according
to the drawing shown above. Measure carefully before cutting! After
cutting the dash, place the gasket supplied with the LMS-350A around the
unit and place the unit in the hole.
Supplied with the LMS-350A are rubber pads, bolts, washers, and cam
clamps to attach the LMS-350A to the dash. Peel the adhesive backing off
the rubber pads and place one on each side of the LMS-350A in the
location where the cam clamp will touch the back side of the dash. Using
the hardware supplied with the unit, attach the LMS-350A to the dash.
Make certain that the cam clamp on the left side of the unit is pointing down
and the cam clamp on the right side of the unit is pointing up before you
start tightening the bolts.
RUBBER PAD
BOLT
CAM CLAMP
(TURNED DOWN)
LOWRANCE
2
RUBBER PAD
BOLT
CAM CLAMP
(TURNED UP)
POWER CONNECTIONS
The LMS-350A works from a twelve-volt battery system. For the best
results, attach the power cable directly to the battery. You can attach the
power cable to an accessory or power buss, however you may have
problems with electrical interference. Therefore, it’s safer to go ahead and
attach the power cable directly to the battery. If the cable is too short, splice
#18 gauge wire onto it. The power cable has four wires; red, black, green,
and white. Red is the positive lead, black is negative or ground. Make
certain to attach the in-line fuse holder to the red lead as close to the power
source as possible. For example, if you have to extend the power cable
to the battery or power buss, attach one end of the fuse holder directly to
the battery or power buss. This will protect both the unit and the power
cable in the event of a short. The LMS-350A uses a 3-amp fuse.
IMPORTANT!
Do not use this product without a 3-amp fuse wired into the power cable!
Failure to use a 3-amp fuse will void your warranty.
If you’re installing an optional speed/temperature sensor, read the speed/
temperature sensor's installation manual for mounting instructions. Route
the sensor’s cable to the LMS-350's power cable and plug it into the
connector marked “SPEED/TEMP CABLE”
TO "P" CONNECTOR
ON ACCURA
TO
GPS
MODULE
TO
SPEED/
TEMP
SENSOR
TO
NMEA
INTERFACE
LMS-350A POWER CONNECTIONS
3
RED
WIRE
3 amp
FUSE
BLACK
WIRE
12 VOLT
BATTERY
The white wire is for a NMEA interface. The LMS-350A sends data to
another electronic navigation devices through the white wire. It receives
data from a differential (DGPS) beacon receiver through the green wire.
If the white and green wires are not used, tape their ends so that they
cannot short.
To connect a device to the LMS-350's NMEA output (white wire), attach
a shielded, twisted pair cable from the device's NMEA intput to the
white wire on the LMS-350's power cable. Solder the ground conductor
of the twisted pair and the shield to the black wire on the power cable.
Do not connect the shield to the other device. Use the green and black
wires in the same manner to attach a DGPS recevier's output to the
LMS-350's input (green wire). See the other instrument's manual and
the NMEA section in this manual for more information.
TRANSDUCER CONNECTIONS
The LMS-350A has dual frequency capability. It can operate at 50 or
192 kHz, separately, or at the same time. The connection diagram
below shows the proper method to attach the transducers to the LMS350A. See the transducer owner’s manual for transducer installation
instructions. If dual frequency (simultaneous) operation is desired, a 50
kHz transducer and the MY-2 transducer adapter cable must be purchased separtately.
See page 18 for more information on dual frequency operation.
DUAL
FREQUENCY
SINGLE FREQUENCY
"T" CONNECTOR ON
LMS-350A
192 kHz
TRANSDUCER
192 kHz or 50 kHz
TRANSDUCER
4
"T" CONNECTOR ON
LMS-350A
TRANSDUCER
ADAPTER
CABLE
(MY-2)
50 kHz
TRANSDUCER
OPTIONAL GPS MODULE INSTALLATION
6
The GPS module can be installed on a flat surface or (with the supplied
adapter) on a pole. Mount the module in an area that guarantees a
clear view of the sky at all times. In order for the module to receive the
signals from the satellites, it must not be obstructed. An ideal location is
on a cabin roof, or deck. The gunnels also make a good location.
Attaching the pole mounting adapter lets you install the module on a
one inch mast. However, for lightning protection, the antenna shouln't
be the highest part of the boat.
Surface Mounting - With Access
If you have access underneath the mounting surface, use the gasket
supplied with the GPS module as a template. Drill four 5.5 mm (7/32")
holes and one 17 mm (11/16") hole for the module's cable. Attach the
cable to the module and pass it down through the hole in the gasket and
the mounting surface. Use 5 mm screws, flat washers, and lock
washers to fasten the GPS module to the mounting surface. Route the
cable to the LMS-350A.
5.5 mm (7/32")
17mm
(11/16")
Hole
Hole
(4 places)
GASKET
DECK
234567890123456789012345678901212345
5 MM SCREWS 5 MM SCREWS
CABLE
5
Surface Mounting - Without Access
4
4
4
If you don't have access to the back side of the mounting surface, use
the "cleats" supplied with the LMS-350A. (Note: This is assuming you
can "snake" the module's cable to a location that is accessable. A hole
will still need to be drilled in the mounting surface for the cable.) Using
the gasket as a template, mark and drill the 17 mm (11/16") hole for the
cable. Attach the cable to the module and drop the other end of the
cable through the gasket and down the hole. Place the module on the
gasket. Slide the "cleats" onto each end of the module and (using the
cleats as templates) mark four holes for 5 mm (#10) mounting screws.
Drill the holes, then replace the cleats on the module and fasten them to
the mounting surface with 5 mm (#10) screws. Route the cable to the
LMS-350A.
"CLEAT"
MARK AND
DRILL FOUR
PLACES
GPS MODULE
"CLEAT"
GASKET
234567890123456789012345678901212345678901234567890123
234567890123456789012345678901212345678901234567890123
234567890123456789012345678901212345678901234567890123
CABLE
6
Pole Mount
First, thread the pole mounting adapter onto the mounting pole or
ratchet base. Align the pole mounting adapter so the module will face
the bow of the boat. Install and tighten the set screw into the pole
mounting adapter and tighten it securely. This should prevent the GPS
module from unscrewing from the pole. Place the gasket onto the pole
mounting adapter. Now attach the cable to the GPS module and pass
the cable through the gasket, pole mounting adapter, and pole. Set the
GPS module on top of the pole mounting adapter and align the four
threaded holes in the module with the holes in the pole mounting
adapter. Using the four stainless steel 5 mm screws and lock washers
supplied with the LMS-350A, attach the pole mounting adapter to the
GPS module. This completes the assembly.
GPS MODULE
POLE
MOUNTING
SET
SCREW
ADAPTER
POLE
If the pole or mast you're using isn't hollow or if the hole in the middle of
the pole is too small for the connectors, use the cable mounting adapter
supplied with your unit. Thread the cable mounting adapter into the
GPS pole mounting adapter. Then thread the pole into the cable mounting adapter. Route the cable down the outside of the pole.
GPS MODULE
CABLE
MOUNTING
ADAPTER
POLE
7
CABLE
MOUNTING
ADAPTER
POLE
OFF
ON
LMS-350A
123
456
789
CLR ENT
0
MAN
EVENT
OVERBOARD
MARKER
LOWRANCE
SENS
RANGE
ZOOM
AUTO
WAYPT
WAYPT
MENU
SONAR GPS PLOTTER WINDOWS
KEYBOARD
The keyboard has keys arranged in a vertical column on the left plus a
horizontal row at the bottom. A ten-key pad and arrow keys on the right
side of the screen lets you enter and change data on the screen. The keys
in the left column are used for sonar and menu selections. The menu key
in the bottom left corner of the keyboard activates the first menu page. The
keys along the bottom of the screen are used to switch between the sonar,
optional GPS, and windows modes.
SONAR - Press this key to switch to the sonar display.
GPS - The GPS navigation displays show when you press this key.
PLOTTER - Press this key to show the GPS Plotter display.
WINDOWS - This key gives you access to the windows mode, which lets
you customize displays.
SENS - Press this key to adjust the unit’s sonar sensitivity.
RANGE - This key lets you adjust the sonar's range.
ZOOM - The LMS-350A gives you 2X and 4X zoom capability with this key.
AUTO - This turns the automatic feature off and on.
WAYPT - Press this key to save and recall waypoints.
8
WAYPT QUICK SAVE - Pressing this key instantly saves your position.
MENU - Press this key to show the menus and gain access to most functions.
CLR - This key clears menus and erases entries from the screen.
ENT - This key is used to enter numbers and make selections.
ARROW KEYS - These keys are used to make menu selections and to
move objects on the screen.
ON - The ON key turns the LMS-350A on.
OFF - Press and HOLD the Off key to turn the LMS-350A off.
DISPLAY - General
The lights are turned on for approximately ten seconds when the LMS350A is first turned on. Menus appear at the same time. To keep the lights
on, press the key adjacent to the Light label. It controls the backlighting
used on the display and keyboard. If you don’t want the lights on, wait ten
seconds and the lights will automatically turn themselves off. The menus
will also disappear after ten seconds, or you can turn them off by pressing
the CLR key on the left side of the zero (0) key.
The Metric label at the top of the screen works the same way. Press the
key adjacent to the Metric label to change the depth from feet to meters.
This also changes the temperature display to degrees Celsius, speed to
knots, and log to kilometers.
The Display menu on the right side of the screen let you adjust the display’s
contrast for the best viewing angle. Pressing the left arrow key decreases
the contrast, the right arrow increases it. After setting the contrast for the
best viewing angle, press the
CLR key to erase the menu or
wait approximately ten seconds and it will automatically
erase. See the Display Contrast section for more information on this feature.
When the LMS-350A is first
turned on, the display will appear similar to the one at left.
The word “AUTOMATIC” in
9
the upper left corner of the display indicates the automatic feature is on.
The digital bottom depth also showsin this box.
MENUS
The LMS-350A uses menus extensively to guide you through the functions and features of the unit. The menu key accesses many of these
features, allowing you to customize the unit to your particular needs and
water conditions. Although you
may have to leave one menu
and enter another to reach the
desired function, all you have
to do is press the key next to
the "More" label to select the
next menu. To return to the
sonar screen, simply press
the key next to the "Exit" label
or press the CLR key.
HELP
An extremely useful feature incorporated into the LMS-350A series is the
Help menus. Virtually every feature has a help menu label that, when
pressed, gives one or more pages of text describing how to use that
feature. For example, pressing the AUTO key brings up a menu letting you
switch the unit into or out of the automatic mode. A help label also appears
on the screen. Pressing the key adjacent to the help label gives you a
description of how automatic works and how it affects different functions.
WINDOWS
You can change the displays on the LMS-350A by using the windows
feature. This lets you customize displays to your own fishing or boating
situations. This feature gives
you 22 different window
screens.
The screens available in the
windows mode are divided into
two or more windows per
screen. Each screen of windows is called a “group”. Group
“A” as shown at right has the
digital displays in one window
and the sonar chart in the other.
10
To use the windows feature,
first press the WINDOWS key.
A screen similar to the one
shown at left appears. The
menu on the right side of the
screen lets you switch between
the “pages” of displays. These
are lettered “A” through “V”.
Group “A” shows first. Press
the down arrow key to move
forward through the screens.
Press the up arrow key to move
backward. For example, pressing the down arrow key once
shows the group “B” screen.
To return to the full sonar
screen, press the “SONAR”
key.
Every one of the group screens
can be modified to some extent. For example, press the
MENU key while group “A” is
displayed. Three new labels
appear on the display as shown above. Two of these labels are window
menus. Pressing the key adjacent to one of the “window menu” labels
gives you a menu with functions that relate only to that window. For
example, if you press the key adjacent to the window menu label on the
sonar chart window, the screen will clear and you will have a new menu
with selections such as “ADJUST CHART SPEED” and “ADJUST
GRAYLINE”. Other window
menus let you change the sonar frequency or turn the Fish
ID feature on.
To exit from a window menu,
11
press the CLR key.
VIEWING WINDOWS
OPTIONS
To see all of the available window options, press the WINDOWS key, then press the
MENU key. Now press the key
adjacent to the “MAIN MENU”
label. Finally, press the key
next to the “VIEW ALL WINDOWS” label. The screen at
right appears.
The first window appears in the upper right corner of the screen. A
description of the screen shows in the box at the bottom of the screen. Now
press the key adjacent to the “NEXT” label. This changes the displayed
window and description.
When you’ve finished viewing
the windows, press the CLEAR
key.
MODIFYING GROUPS
To modify or “customize” a
group, first press the WINDOWS key, then press the
MENU key. Now press the key
adjacent to the “MAIN MENU”
label at the bottom of the screen.
The screen shown at right appears.
12
Now press the key adjacent to
the “RE-PROGRAM A
GROUP” label. The screen
shown below appears.
Select the letter of the group
you wish to customize by pressing the key adjacent to the
group’s label. If the label isn’t
shown on this page, press the
key adjacent to the “MORE”
label. In this example, the key
next to the “GROUP A” label
was pressed. The screen
shown at the top of the next
page appears.
The depth window appears in
the upper right corner of the
screen. Press the key adjacent
to the “NEXT WINDOW” label
to move through the windows.
If you reach the last window, or
if you wish to go backwards
through the windows, press the
key next to the “PREV WINDOW” label. When the desired window is on the screen, press the key next
to the “USE WINDOW” label. The screen clears, placing the new window
in the upper left corner of the screen. If the new window takes up half the
screen, the unit will place it on the left side of the screen.
Continue with the window selections until the screen is filled. The unit will
stay in the windows mode using your new customized screen. If you don’t
want to fill a screen and only use one, two, or three windows in a group,
simply press the key adjacent to the “STOP” label. This saves the group
and exits the modify windows mode.
Remember, you can always return to the full screen sonar mode by
pressing the “SONAR” key in the bottom left corner of the LMS350A. To switch back to your customized screen from the full screen
sonar, simply press the WINDOWS key, then use the down arrow key to
switch to the group you customized.
NOTE: The LMS-350A saves all window changes in memory. It keeps
these changes even if power is turned off. However, a preset does erase
all window changes and returns to the standard windows.
RESETTING ALL GROUPS
To return all of the groups to their factory settings without turning the unit
off and on again, press the WINDOWS key, then press the MENU key,
then press the key adjacent to the “MAIN MENU” label. Now press the key
adjacent to the “RE-PROGRAM A GROUP” label. Finally, press the key
13
SONAR OPERATION
AUTOMATIC
When the LMS-350A is first
turned on, the Automatic feature is enabled. This is indicated by the word “AUTO” at
the top of the screen. The Automatic feature adjusts the sensitivity and range so the bottom
signal is displayed in the lower
half of the screen at all times.
To turn Automatic off, first press
the AUTO key. A menu appears at the bottom of the
screen above the left and right
arrows. Press the left arrow
key to switch to the manual
mode. The letters “Man” appear in the upper left corner of
the display, indicating the unit
is in the manual mode. To turn
Automatic on, press the AUTO
key again, then press the right
arrow key.
Remember, when the LMS-350A is in the automatic mode, you have a
limited adjustment range on the Sensitivity control and no control over the
Range. Zoom adjusts differently in automatic than manual, also.
14
SENSITIVITY
The sensitivity key on the LMS-350A controls the ability of the unit to pick
up echoes. A low sensitivity level excludes much of the bottom information, fish signals, and other target information. High sensitivity levels
enables you to see this detail, but it can also clutter the screen with many
undesired signals. Typically, the best sensitivity level shows a good solid
bottom signal with Grayline and some surface clutter.
When the LMS-350A is in the Automatic mode, the sensitivity is automatically adjusted to keep a solid bottom signal displayed, plus a little more.
This gives it the capability to show fish and other detail.
However, situations occur where it becomes necessary to increase or
decrease the sensitivity. This typically happens when you wish to see
more detail, so an increase in sensitivity is indicated. The procedure to
adjust it is the same whether the unit is in the automatic or manual mode.
To adjust the sensitivity, press the SENS key. The sensitivity adjust menu
appears on the right side of the screen.
The sensitivity menu has left and right arrows, plus a horizontal bar graph.
The graph gives a visual indication of the sensitivity level. The number
above the arrows also shows the percentage of sensitivity in use.
To increase the sensitivity level,
press the right arrow key. As
you press the key, the menu’s
bar graph will grow wider and
the percentage will increase in
value. You can also see the
difference on the chart record
as it scrolls. When the sensitivity is at the desired level, release the key.
To decrease the sensitivity
level, press the key adjacent to
the left arrow. The bar graph and percentage will decrease. When the
sensitivity is at the desired level, release the key.
When you reach either the maximum or minimum limit, a tone sounds.
To turn the menus off, press the CLR key or wait a few seconds and the
menus will automatically disappear.
15
RANGE - Automatic
When turned on for the first time, the LMS-350A automatically places the
bottom signal in the lower half of the screen. This is called Auto Ranging
and is part of the automatic function. The range cannot be changed
manually while the unit is in automatic.
RANGE - Manual
The LMS-350A gives you control over the range when it’s in the manual
mode. There are two different methods used to change the range. The first
way changes only the lower limit by pressing the arrow keys. On the
screen shown below, the lower limit is 60 feet. The upper limit is zero. The
second method lets you change
both the upper and lower limits. This let's you create a
"zoom" window down to five
feet in virtually any combination of upper and lower limits.
For example, a range with a 15
foot upper limit and a 45 foot
lower limit creates a 30 foot
zoom window. If the original
range was zero to sixty feet,
then this created a 2X zoom.
To change the range, first make certain the LMS-350A is in the manual
mode. Next, press the RANGE key. The range adjustment menu appears
on the right side of the display. To change only the lower limit, simply press
the up or down arrow keys to decrease or increase the range. The
available ranges are 0-5, 10, 20, 30, 40, 60, 100, 150, 200, 300, 500, 800,
1000, 1500, 2000, 3000, and 5000 feet. After the desired range is
displayed, press the CLEAR key to erase the range menu.
NOTE: The maximum depth
capability of the LMS-350A depends on the transducer installation, water and bottom conditions, and other factors. The
performance of the LMS-350A
will vary from day-to-day because of changing conditions.
16
To change an upper or lower
limit using the numbered keys,
first press the RANGE key, then
press the key next to either the
"CHANGE UPPER LIMIT" or
"CHANGE LOWER LIMIT" labels. On the screen shown at
right, the key next to the
"CHANGE UPPER LIMIT" was
pressed. Now enter the desired
depth, using the numbered
keys. In this example, we entered 35 feet. Now press the ENT key. The LMS-350A erases the range
menus from the screen, and uses the new range you entered as shown
below.
To change the lower limit, simply repeat the above steps, but
press the key next to the
"CHANGE LOWER LIMIT" label. Now enter the desired lower limit and press the ENT key.
The LMS-350A erases the lower limit menus and changes
the lower limit to the one you
specified.
If you make a mistake while entering a limit, simply press the CLR key to
erase the numbers. To exit from either the upper limit or lower limit entry
screen, simply press the CLR key again.
ZOOM
Enlarging or “zooming” the picture is a common method used to show
small detail and fish signals. The LMS-350A gives you two different zoom
sizes, plus a split screen zoom option. The zoom operation and adjustment is different in the automatic and manual modes.
ZOOM - AUTOMATIC MODE
To zoom the display in the automatic mode, first press the ZOOM key. All
targets on the display are enlarged four times normal size automatically.
The menus shown at the top of the next page also appear.
17
next to the “RESET ALL
GROUPS” label.
Turn the zoom feature on (or
off) by pressing the key adjacent to the “OFF/ON” label.
Pressing the key adjacent to
the “2X/4X” label enlarges echoes from two times to four
times their normal size.
To switch between the split
screen zoom and full screen
zoom, press the key adjacent to the “SPLIT/FULL” label. The screen
instantly splits into two sections. All targets on the left are shown at four
times the size of the ones on the right. If you switch to the 2X zoom mode,
echoes on the left side of the screen are shown at twice the size as the
ones on the right. The echoes that scroll across the screen are the exact
same echoes on both sides of the screen. They’re simply enlarged on the
left side. This feature tracks the bottom, keeping it on the display at all
times, when the automatic feature is on. Once you’ve set the zoom as
desired, press the CLR key to erase the menus.
ZOOM - MANUAL MODE
When you press the zoom key while the unit is in the manual mode, the
screen shown below appears. All of the menus on this screen work
identically as described above. However, one additional menu item is
shown when the unit is in the manual mode: “ADJUST”.
To adjust the zoom, press the key adjacent to the “ADJUST” label. A
screen similar to the one below appears. A zoom bar and adjust arrows
appear on the screen. The echoes on the left side of the screen are the
ones that appear between the
top and the bottom of the zoom
bar. Press the up or down arrow keys to move the zoom bar
up or down. As you adjust the
zoom bar, the echoes move on
the left side of the screen at the
same time. The zoom adjust
menus will automatically clear
a few seconds after you’ve
pressed the last key. Remember, the LMS-350A won’t track
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the bottom when it’s in the
manual mode.
MENU - PAGE 1
CHART SPEED
The rate echoes scroll across
the screen is called the chart
speed. It’s adjustable by first
pressing the menu key, then
pressing the key adjacent to
the “Adjust Chart Speed” label.
The chart speed menu appears
on the right side of the screen. Increase the chart speed by pressing the
right arrow key or decrease it
by pressing the left arrow key.
The percentage of chart speed
in use changes as the arrow
keys are pressed. The bar chart
also gives a graphical indication of the chart speed. You
can see the change on the
screen (both on the menu and
on the chart record) as you
press the keys. After you’ve
made the adjustment, press
the CLR key to erase the menu.
To stop the chart, press the key adjacent to the “STOP” label in the unit’s
lower left corner. To start the chart, press the key next to the “START"
label.
GRAYLINE
®
GRAYLINE lets you distinguish between strong and weak echoes. It
“paints” gray on targets that are stronger than a preset value. This allows
you to tell the difference between a hard and soft bottom. For example, a
soft, muddy or weedy bottom returns a weaker signal which is shown with
a narrow or no gray line. A hard bottom returns a strong signal which
causes a wide gray line.
If you have two signals of equal size, one with gray and the other without,
then the target with gray is the stronger signal. This helps distinguish
weeds from trees on the bottom, or fish from structure.
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GRAYLINE® ON
GRAYLINE® OFF
GRAYLINE is adjustable. Since GRAYLINE shows the difference between strong and weak signals, adjusting the sensitivity may require a
different GRAYLINE level, also. The level chosen by the LMS-350A at
power on is usually adequate
for most conditions. Experiment
with your unit to find the
GRAYLINE setting that’s best
for you.
To adjust GRAYLINE, press
the MENU key, then press the
key adjacent to the “Adjust
Chart Grayline” label. A screen
similar to the one at right appears. Now press the left arrow
key to decrease the gray level.
Press the right arrow key to increase it. The percentage of GRAYLINE in
use changes as the arrow keys are pressed. The bar chart also gives a
graphical indication of the GRAYLINE level. You can see the change on
the screen (both on the menu and on the chart record) as you press the
keys. After you’ve made the adjustment, press the CLR key to erase the
menu.
FISH I.D.
The Fish I.D. feature identifies targets that meet certain conditions as fish.
The micro-computer analyses all echoes and eliminates surface clutter,
thermoclines, and other signals that are undesirable. In most instances,
remaining targets are fish. The Fish I.D. feature displays symbols on the
screen in place of the actual fish echoes. There are four fish symbol sizes:
tiny, small, medium, and large. These are used to designate the relative
size between targets. In other words, it displays a small fish symbol when
it thinks a target is a small fish, a medium fish symbol on a larger target, etc.
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outwards from a group of limbs is the hardest object for the Fish I.D.
feature to distinguish from fish. You may see Fish I.D. symbols on the
screen when actually, there are no fish. Practice with the unit in both the
Fish I.D. mode and without to become more familiar with the Fish I.D.
feature.
To turn the Fish I.D. feature on, press the menu key, then press the key
adjacent to the “Turn Fish-ID On” label. Echoes will continue to scroll
across the screen, however, the surface clutter at the top will no longer be
displayed. Any targets the micro-computer determines are fish will be
displayed as fish symbols. To turn the Fish I.D. feature off again, first press
the menu key. Next, press the key adjacent to the “Turn Fish I.D. Off” label.
The menu immediately disappears and the sonar screen returns.
Remember, the Fish I.D. feature can’t be used when the LMS-350A is in
the manual mode. If you turn the Fish I.D. feature on when the LMS-350A
is in manual, the micro-computer will turn the automatic feature on. If you
turn automatic off when the Fish I.D. feature is on, the Fish I.D. feature will
be turned off also.
The micro-computer is sophisticated, but it can be fooled. It cannot
distinguish between fish and other suspended objects such as trotlines,
turtles, submerged floats, air bubbles, etc. Individual tree limbs extending
DISPLAY CONTRAST
The unit’s display contrast is adjustable to suit different lighting conditions.
To adjust it, first press the menu key. The first menu page appears. Now
press the key next to the “Adjust Display Contrast” label. A
screen similar to the one below
appears. Now press the key
adjacent to the left arrow to
decrease the contrast. Press
the key adjacent to the right
arrow to increase it. The percentage of contrast in use
changes as the arrow keys are
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ALARMS
The LMS-350A has three different types of sonar alarms. The first is the
Fish Alarm. It sounds when the Fish I.D. feature determines an echo or
group of echoes is a fish. Another alarm is the Zone Alarm which consists
of a bar. Any echo that appears inside this bar triggers the alarm. The last
alarm is called the Depth Alarm. Only the bottom signal will trigger this
alarm. This is useful as an anchor watch, a shallow water alert, or for
navigation.
To adjust an alarm, first press
the MENU key. Now press the
key next to the "Adjust Alarms"
label. The screen shown below
appears. Press the key next to
the “Set Depth or GPS Alarms”
to adjust the shallow or deep
digital alarms.Press the key
next to the "Set Zone Alarm" to
adjust the zone alarm. The fish
alarm doesn't have an adjustment. It's either on or off.
The following section describes
each sonar alarm and its limits.
FISH ALARM
Use the fish alarm for a distinctive audible alarm when fish or other
suspended objects are detected by the Fish I.D. feature. A different tone
sounds for each fish symbol size shown on the display.
To turn the fish alarm on, press the MENU key, then press the key next
to the "Adjust Alarms" label. The screen shown above appears. Now press
the key next to the "Turn Fish Alarm On" label.
To turn the fish alarm off, repeat the above steps. The label on the Alarms
menu now reads "Turn Fish Alarm Off". Press the key next to that label
to turn the fish alarm off.
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DEPTH ALARMS
The depth alarms sound a tone
when the bottom signal goes
shallower than the shallow
alarm’s setting or deeper than
the deep alarm’s setting. For
example, if you set the shallow
alarm to ten feet, the alarm will
sound a tone if the bottom signal is less than ten feet. It will
continue to sound until you
mute it or until the bottom goes
deeper than 10 feet. The deep
alarm works just the opposite. It sounds a warning tone if the bottom depth
goes deeper than the alarm's setting. Both depth alarms work only off the
digital bottom depth signals. No other targets will trip these alarms. These
alarms can be used at the same time or by themselves.
To set the depth alarms, first press the MENU key, then press the key next
to the "Adjust Alarms" label. The screen on the previous page appears.
Now press the key next to the "Set Depth Alarms" label. The screen at the
top of this page appears.
To adjust the shallow alarm, press the key next to the "Shallow" label. To
adjust the deep alarm, press the key next to the "Deep" label. Both alarms
adjust identically. We'll use the
shallow alarm as an example.
Pressing the key next to the
"Shallow" label moves the
black box from the "OFF"
postion to the "Adjust". A new
screen appears as shown at
right. Use the numbered keypad on the right side of the unit
to enter the shallow alarm setting. We used 10 feet in this
example. After you've entered
the desired alarm depth, press
the ENT key. This enters the
alarm depth into memory. Now press the key next to the "Exit" label. The
shallow alarm is now set. If the bottom goes shallower than 10 feet, the
alarm will sound and a warning message appears on the screen at the
same time. A label also appears letting you mute the alarm, if desired.
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ZONE ALARM
The zone alarm consists of a
bar that appears on the right
side of the screen. Any echo
that appears on the screen
between the top and bottom of
the zone alarm’s bar will “trip”
the zone alarm.
Note: The zone alarm isn't
available in the Windows mode.
To set the zone alarm, press
the MENU key. Now press the key next to the “Adjust Alarms” label.
Finally, press the key next to the "Set Zone Alarm" label. A screen similar
to the one shown below appears.
The zone alarm bar shows on
the right side of the screen.
Use the arrow keys to move
the bottom of the bar higher or
lower. To move the top of the
bar, first press the key next to
the “CHANGE TO UPPER” label. Now use the arrow keys to
move the top of the bar higher
or lower. When you have the
zone alarm bar set as desired,
press the CLR key to erase the
menus.
The above steps automatically turn the zone alarm on if it was off. To turn
the zone alarm off, press the MENU key, then press the key next to the
"Adjust Alarms" label. Now press the key next to the "Turn Zone Alarm
Off"label at the bottom of the screen.
Normally, the zone alarm bar disappears from the screen after you make
adjustments. To leave the zone alarm bar on the screen all of the time, see
the "Display Zone Alarm Bar" section in this manual for instructions.
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