Eagle Electronics FISHEASY 320C User Manual
www.eaglesonar.com
Pub. 988-0143-781
Fish-Finding & Depth-Sounding Sonar
Installation and Operation
Instructions
Copyright © 2004 LEI-Eagle
All rights reserved.
®
Eagle
FishEasy
is a registered trademark of LEI
®
320C is a registered trademark of LEI
Eagle Electronics may find it necessary to change or end our policies,
regulations, and special offers at any time. We reserve the right to do so
without notice. All features and specifications subject to change without
notice. All screens in this manual are simulated.
No part of this manual may be copied, reproduced, republished,
transmitted or distributed for any purpose, without prior written
consent of Eagle Electronics. Any unauthorized commercial
distribution of this manual is strictly prohibited.
For free owner's manuals and the most current information on
this product, its operation and accessories,
visit our web site:
www.eaglesonar.com
Eagle Electronics
P.O. Box 669
Catoosa, OK USA 74015
Printed in USA.
Table of Contents
Introduction ............................................................................... I
Capabilities and Specifications: Fisheasy 320c........................... 5
How Sonar Works ......................................................................... 7
How to Use this Manual: Typographical Conventions................ 8
Installation & Accessories..................................................... 11
Preparations................................................................................ 11
Transducer Installation.............................................................. 11
Recommended Tools and Supplies ......................................... 12
Transom Installation ..........................................................12
Trolling Motor Installations ............................................... 12
Shoot-Through Hull Installations ...................................... 12
Selecting a Transducer Location............................................ 13
How Low Should You Go?....................................................... 14
Shoot-Thru-Hull vs. Transom Mounting ............................... 15
Transom Transducer Assembly and Mounting ..................... 16
Trolling Motor Bracket Installation....................................... 20
Transducer Orientation and Fish Arches .............................. 21
Shoot-Thru-Hull Preparation................................................. 23
Hulls with Floatation Materials......................................... 23
Testing Determines Best Location......................................... 24
Shoot-Thru-Hull Installation ................................................. 26
Speed/Temperature Sensors ................................................. 28
Speed Sensor Installation....................................................... 31
Power Connections.................................................................. 33
Mounting the Sonar Unit: in-Dash, Bracket or Portable...... 35
Bracket Installation................................................................ 35
Portable Sonar Installation .................................................... 38
Installing the Batteries .......................................................... 39
Portable Transducer Assembly .............................................. 41
Basic Sonar Operation ........................................................... 43
Keyboard Basics.......................................................................... 43
1. Menu/Pwr (Menu and Power)............................................. 43
i
2. Ent/Pages (Enter and Pages).............................................. 44
3. Exit ...................................................................................... 44
4. Up and Down Arrows.......................................................... 44
Memory........................................................................................ 44
Menus .......................................................................................... 44
Main Menu .............................................................................. 45
Sonar Menu ............................................................................. 46
Pages ........................................................................................... 48
Basic Sonar Quick Reference ..................................................... 51
Sonar Operations ........................................................................ 52
Fish Symbols vs. Full Sonar Chart ........................................ 55
Other Free Training Aids ....................................................... 56
Advanced Sonar Options & Other Features...................... 58
ASP (Advanced Signal Processing) ......................................... 58
Alarms ......................................................................................... 59
Depth Alarms .......................................................................... 59
To Adjust and Turn on the Shallow Alarm:....................... 60
To Adjust and Turn on the Deep Alarm:............................ 60
Fish Alarm............................................................................... 61
Backlight Level ........................................................................... 61
Calibrate Speed........................................................................... 62
Chart Speed................................................................................. 63
Colorline ................................................................................... 64
Contrast....................................................................................... 65
Depth Cursor............................................................................... 66
Depth Range - Automatic ........................................................... 67
Depth Range - Manual................................................................ 67
To Turn Auto Depth Range on Again .................................... 68
FasTrack .................................................................................. 68
Fish I.D. (Fish Symbols & Depths) ......................................... 69
FishTrack ................................................................................. 70
Overlay Data ............................................................................... 71
To Change Displayed Data Font Size .................................... 73
ii
Ping Speed & HyperScroll....................................................... 74
To Change Ping Speed: ........................................................... 75
To Adjust Sensitivity: ............................................................. 75
To Turn Off HyperScroll:........................................................ 75
Pop-Up Help................................................................................ 76
Reset Options .............................................................................. 76
Reset Water Distance ................................................................. 77
Sensitivity & Auto Sensitivity.................................................... 77
Automatic Sensitivity ............................................................. 78
To Turn Auto Sensitivity Back On......................................... 79
Set Keel Offset ............................................................................80
Set Language .............................................................................. 81
Software Version Information.................................................... 81
Sonar Chart Mode....................................................................... 82
Sonar Page & Sonar Chart Display Options ............................. 82
Full Sonar Chart ..................................................................... 83
Split Zoom Sonar Chart.......................................................... 83
Digital Data/Chart .................................................................. 84
Sonar Simulator.......................................................................... 85
Stop Chart ................................................................................... 85
Surface Clarity............................................................................ 86
Transparency ..............................................................................87
Units of Measure......................................................................... 88
Zoom Pan..................................................................................... 91
Troubleshooting ......................................................................93
Noise ........................................................................................ 95
iii
Notes
iv
Introduction
Thank you for buying an Eagle sonar! Your unit is a high-quality, remarkably-priced color sonar designed for both professional and novice
fishermen. All Eagle sonars have an automatic mode that finds and
displays the bottom, fish, underwater structure and more – right out of
the box. All you have to do is press the on (
MENU/PWR) key.
However, if you want to fine-tune your unit, press the
The FishEasy
scrolling through easy-to-use menus with the arrow and menu keys.
To get started with your Eagle sonar, first read the installation section.
It contains instructions for mounting the sonar unit, the transducer
and any optional accessories, such as a speed sensor.
Following recommended installation practices will pay off in optimum
performance of your FishEasy 320C. Improper installation can cause
problems down the road, especially if the transducer is badly mounted.
After you've read the installation instructions, install the unit and accessories. Then, read the rest of the manual. The more you know about
your sonar, the better it will work for you.
Take advantage of the Simulator feature. It allows you to practice operating your sonar before you get it in the water. And when you finally
head for your favorite fishing hole, take this manual along for reference.
®
320C has several powerful features you can control by
MENU key again.
Capabilities and Specifications: FishEasy 320C
General
Case size:......................... 5.8" H x 4.3" W x 2.5" D (14.7 cm H x 10.8 cm
W x 6.6 cm D) sealed, waterproof; suitable for
saltwater use.
Display:............................ 1/4 VGA color, transflective TFT display; 3.5"
(8.9 cm) diagonal viewing area.
5
Resolution:...................... 320 pixels (vert.) x 240 pixel (horiz.) resolu-
tion; 153,600 total pixels
Backlighting:.................. Backlit screen and keypad for night use.
Input power:................... 10 to 17 volts DC.
Current drain: ............... 200 ma lights off; 250 ma lights on.
Back-up memory: .......... Built-in memory stores sonar settings when
unit is turned off.
Sonar
Frequency:...................... 200 kHz.
Transducers: .................. A model HST-WSU Skimmer
transducer
comes packed with your sonar unit. Operates
at speeds up to 70 mph (61 kts). Optional thruhull, portable and trolling motor transducers
are available.
Transmitter: ................... 800 watts peak-to-peak power (typical); 100
watts RMS power (typical).
Sonar sounding
depth capability: ........... 600 feet (182 meters). Actual capability de-
pends on transducer configuration and installation, bottom composition and water conditions. All sonar units typically read deeper
in fresh water than in salt water.
Depth display:................ Continuous digital readout.
Audible alarms: ............. Deep/shallow/fish.
Automatic ranging:....... Yes, with instant screen updates.
Zoom bottom track: ...... Yes.
Split-screen zoom:......... Yes.
6
Surface water temp: ..... Yes, built into transducer. Optional addi-
tional temp sensors for live well, bait well,
etc. are available.
Speed/distance log: ....... Yes, with optional speed sensor.
NOTICE!
The storage and operation temperature for your unit is from -4 degrees to +167 degrees Fahrenheit (-20 degrees to +75 degrees Celsius). Extended storage in temperatures higher or lower than specified will damage the liquid crystal display in your unit. This type of
damage is not covered by the warranty. For more information, contact the factory's Customer Service Department; phone numbers
are inside the manual's back cover.
How Sonar Works
Sonar has been around since the 1940s, so if you already know how it
works, skip ahead to the next segment on the typographical conventions
used in this manual. But, if you've never owned a sonar fish finder, this
segment will tell you the underwater basics.
Sonar is an abbreviation for SOund NA
ogy developed during World War II for tracking enemy submarines. (Eagle developed the world's first transistorized sportfishing sonar in 1957.)
A sonar consists of a transmitter, transducer, receiver and display. In
simple terms, here's how it finds the bottom, or the fish:
The transmitter emits an electrical impulse, which the transducer converts into a sound wave and sends into the water. (The sound frequency
can't be heard by humans or fish.) The sound wave strikes an object
(fish, structure, bottom) and bounces back to the transducer, which
converts the sound back into an electrical signal.
The receiver amplifies this return signal, or echo, and sends it to the
display, where an image of the object appears on the scrolling sonar
vigation and Ranging, a technol-
7
chart. The sonar's microprocessor calculates the time lapse between the
transmitted signal and echo return to determine the distance to the
object. The whole process repeats itself several times each second.
How to use this manual: typographical conventions
Many instructions are listed as numbered steps. The keypad and arrow
"keystrokes" appear as boldface type. So, if you're in a real hurry (or
just need a reminder), you can skim the instructions and pick out what
menu command to use by finding the boldface command text. The following paragraphs explain how to interpret the text formatting for
those commands and other instructions:
Arrow Keys
The arrow keys control a horizontal line depth cursor on the sonar
screen. The arrow keys also help you move around the menus so you
can execute different commands. They are represented by symbols like
these, which denote the down arrow key and the up arrow: ↓ ↑.
Keyboard
The other keys perform a variety of functions. When the text refers to a
key to press, the key is shown in bold, sans serif type. For example, the
"Enter/Pages" key is shown as
as
MENU.
Menu Commands
A menu command or a menu option will appear in small capital letters,
in a bold sans serif type like this:
are to select this command or option from a menu or take an action of
some kind with the menu item. Text that you may need to enter or file
names you need to select are show in italic type, such as data type.
ENT and the "Menu/Power" key is shown
DEPTH CURSOR. These indicate that you
8
Instructions = Menu Sequences
Most functions you perform with the sonar unit are described as a sequence of key strokes and selecting menu commands. We've written
them in a condensed manner for quick and easy reading.
For example, instructions for turning on the Fish ID feature would
look like this:
1. From the Sonar Page, press
2. Press ↓ to
FISH ID SYMBOLS|ENT|EXIT|EXIT.
MENU|↓ to SONAR FEATURES|ENT.
Translated into complete English, step 1 above would mean: "Start on
the Sonar Page. Press the Menu key then repeatedly press (or press and
hold) the down arrow key to scroll down the menu and select (highlight)
the Sonar Features menu command. Then press the Enter key."
Step 2 would mean: "Press the down arrow key to select (highlight) the
Fish ID symbols command. Next, press the Enter key, then press the
Exit key twice."
9
Notes
10
Installation & Accessories
Preparations
You can install the sonar system in some other order if you prefer, but
we recommend this installation sequence:
CAUTION:
You should read over this entire installation section before drilling any holes in your vehicle or vessel!
1. Determine the approximate location for the sonar unit, so you can
plan how and where to route the cables for the transducer and power.
This will help you make sure you have enough cable length for the desired configuration.
2. Determine the approximate location for the transducer and its cable
route.
3. Determine the location of your battery or other power connection,
along with the power cable route.
4. Install the transducer and route the transducer cable to the sonar
unit.
5. Route the power cable from the unit's location to an appropriate
power source and connect it there.
6. Connect the transducer/power cable to the unit and mount the sonar
unit on the bracket.
Transducer Installation
These instructions will help you install your Skimmer
transom, on a trolling motor or inside a hull. Please read all instructions before proceeding with any installation.
Your Skimmer transducer typically comes packaged with a one-piece
stainless steel bracket for mounting it to the transom of your boat. The
optional trolling motor mount uses a one-piece plastic bracket with an
adjustable strap. These are "kick-up" mounting brackets. They help pre-
transducer on a
11
vent damage if the transducer strikes an object while the boat is moving.
If the transducer does "kick-up," the bracket can easily be pushed back
into place without tools.
Read these instructions carefully before attempting the installation.
Determine which of the installation methods is right for your boat.
Remember, the transducer location and installation is the most
critical part of a sonar installation.
Recommended Tools and supplies
If you prefer the option of routing the cable through the transom, you
will need a 5/8" drill bit. (If you intend to install an additional speed or
temp sensor and route its cable through the same hole in the transom,
you will need a 1" (25.4 mm) drill bit to accommodate all the cables.)
NOTE:
The following installation types also call for these recommended
tools and required supplies that you must provide (supplies listed
here are not included):
Transom installation
Tools include: two adjustable wrenches, drill, #29 (0.136") drill bit, flathead screwdriver. Supplies: high quality, marine grade above- or below-
waterline sealant compound.
Trolling motor installations
Tools: two adjustable wrenches, flat-head screwdriver. Supplies: plastic
cable ties.
Shoot-through hull installations
Tools: these will vary depending on your hull's composition. Consult your
boat dealer or manufacturer. Other tools are a wooden craft stick or
similar tool for stirring and applying epoxy, and a paper plate or piece
of cardboard to mix the epoxy on. Supplies: rubbing alcohol, 100 grit
sandpaper, specially formulated epoxy adhesive available from LEI (see
ordering information on the inside back cover). A sandwich hull also
requires polyester resin.
12
Selecting a Transducer Location
Deadrise less than 10
1. The location must be in the water at all times, at all operating speeds.
2. The transducer must be placed in a location that has a smooth flow of
water at all times. If the transducer is not placed in a smooth flow of
water, interference caused by bubbles and turbulence will show on the
sonar's display in the form of random lines or dots whenever the boat is
moving.
NOTE:
Some aluminum boats with strakes or ribs on the outside of the
hull create large amounts of turbulence at high speed. These boats
typically have large outboard motors capable of propelling the boat
at speeds faster than 35 mph. Typically, a good transom location on
aluminum boats is between the ribs closest to the engine.
3. The transducer should be installed with its face pointing straight
down, if possible. For shoot-thru applications: Many popular fishing boat
hulls have a flat keel pad that offers a good mounting surface. On vee
hulls, try to place the transducer where the deadrise is 10° or less.
°
Pad
Left, vee pad hull; right, vee hull. A pod style transducer is shown
here, but the principle is the same for Skimmers inside a hull.
Strakes
4. If the transducer is mounted on the transom, make sure it doesn't
interfere with the trailer or hauling of the boat. Also, don't mount it
closer than approximately one foot from the engine's lower unit. This
will prevent cavitation (bubble) interference with propeller operation.
5. If possible, route the transducer cable away from other wiring on the
boat. Electrical noise from engine wiring, bilge pumps and aerators can
13
be displayed on the sonar's screen. Use caution when routing the trans-
prevent the transducer from
location
Transom
centerline
ducer cable around these wires.
CAUTION: Clamp the transducer cable to transom near
the transducer. This will help
entering the boat if it is
knocked off at high speed.
Good location
Poor location
Good
Poor angle
Good and poor transducer locations.
Good location
How low should you go?
For most situations, you should install your Skimmer transducer so
that its centerline is level with the bottom of the boat hull. This will
usually give you the best combination of smooth water flow and protection from bangs and bumps.
Transducer
Align transducer centerline with hull bottom.
Hull bottom
14
However, there are times when you may need to adjust the transducer
slightly higher or lower. (The slots in the mounting brackets allow you
to loosen the screws and slide the transducer up or down.) If you frequently lose bottom signal lock while running at high speed, the transducer may be coming out of the water as you cross waves or wakes.
Move the transducer a little lower to help prevent this.
If you cruise or fish around lots of structure and cover, your transducer
may be frequently kicking up from object strikes. If you wish, you may
move the transducer a little higher for more protection.
There are two extremes you should avoid. Never let the edge of the
mounting bracket extend below the bottom of the hull. Never let the
bottom – the face – of the transducer rise above the bottom of the hull.
Shoot-thru-hull vs. Transom Mounting
In a shoot-thru-hull installation, the transducer is bonded to the inside
of the hull with epoxy. The sonar "ping" signal actually passes through
the hull and into the water. This differs from a bolt-thru-hull installation (often called simply "thru-hull"). In that case, a hole is cut in the
hull and a specially designed transducer is mounted through the hull
with a threaded shaft and nut. This puts the transducer in direct contact
with the water.
Typically, shoot-thru-hull installations give excellent high speed operation and good to excellent depth capability. There is no possibility of
transducer damage from floating objects, as there is with a transommounted transducer. A transducer mounted inside the hull can't be
knocked off when docking or loading on a trailer.
However, the shoot-thru-hull installation does have its drawbacks.
First, some loss of sensitivity does occur, even on the best hulls. This
varies from hull to hull, even from different installations on the same
hull. This is caused by differences in hull lay-up and construction.
Second, the transducer angle cannot be adjusted for the best fish arches
on your sonar display. (This is not an issue for flasher-style sonars.)
15
Lack of angle adjustment can be particularly troublesome on hulls that
sit with the bow high when at rest or at slow trolling speeds.
Third, a transducer CAN NOT shoot through wood and metal hulls.
Those hulls require either a transom mount or a thru-hull installation.
Fourth, if your Skimmer transducer has a built in temp sensor, it will
only show the temperature of the bilge, not the water surface temp.
Follow the testing procedures listed in the shoot-thru-hull installation
section at the end of this lesson to determine if you can satisfactorily
shoot through the hull.
Transom Transducer Assembly And Mounting
The best way to install the transducer is to loosely assemble all of the
parts first, place the transducer's bracket against the transom and see if
you can move the transducer so that it's parallel with the ground.
1. Assembling the bracket. Press the two small plastic ratchets into the
sides of the metal bracket as shown in the following illustration. Notice
there are letters molded into each ratchet. Place each ratchet into the
bracket with the letter "A" aligned with the dot stamped into the metal
bracket. This position sets the transducer's coarse angle adjustment for a
14° transom. Most outboard and stern-drive transoms have a 14° angle.
Dot
Align plastic ratchets in bracket.
2. Aligning the transducer on the transom. Slide the transducer between the two ratchets. Temporarily slide the bolt though the transducer
assembly and hold it against the transom. Looking at the transducer
16
from the side, check to see if it will adjust so that its face is parallel to
the ground. If it does, then the "A" position is correct for your hull.
If the transducer's face isn't parallel with the ground, remove the
transducer and ratchets from the bracket. Place the ratchets into the
holes in the bracket with the letter "B" aligned with the dot stamped in
the bracket.
Reassemble the transducer and bracket and place them against the
transom. Again, check to see if you can move the transducer so it's parallel with the ground. If you can, then go to step 3. If it doesn't, repeat
step 2, but use a different alignment letter until you can place the
transducer on the transom correctly.
Ratchets
Insert bolt and check transducer position on transom.
3. Assembling the transducer. Once you determine the correct position for the ratchets, assemble the transducer as shown in the following
figure. Don't tighten the lock nut at this time.
17
Nut
Metal
washer
Rubber
washers
Assemble transducer and bracket.
Metal washer
Bolt
4. Drilling mounting holes. Hold the transducer and bracket assembly
against the transom. The transducer should be roughly parallel to the
ground. The transducer's centerline should be in line with the bottom of
the hull. Don't let the bracket extend below the hull!
Mark the center of each slot for the mounting screw pilot holes. You
will drill one hole in the center of each slot.
Drill the holes using the #29 bit (for the #10 screws).
Transom
Transom
Position transducer mount on transom and mark mounting holes.
Side view shown at left and seen from above at right.
18
5. Attaching transducer to transom. Remove the transducer from
Flat-bottom hull
the bracket and re-assemble it with the cable passing through the
bracket over the bolt as shown in the following figures.
Route cable over bolt and through bracket. Side view shown at left and
seen from above at right.
Attach the transducer to the transom. Slide the transducer up or down
until it's aligned properly with the bottom of the hull as shown in the
preceding and following figures. Tighten the bracket's mounting screws,
sealing them with the sealant compound.
Adjust the transducer so that it's parallel to the ground and tighten the
nut until it touches the outer washer, then add 1/4 turn. Don't over
tighten the lock nut! If you do, the transducer won't "kick-up" if it
strikes an object in the water.
Bottom
of
hull
Deep-"vee" hull
Align transducer centerline with hull bottom and attach to transom.
6. Route the transducer cable through or over the transom to
the sonar unit. Make sure to leave some slack in the cable at the
19
transducer. If possible, route the transducer cable away from other wiring on the boat. Electrical noise from the engine's wiring, bilge pumps,
VHF radio wires and cables, and aerators can be picked up by the sonar.
Use caution when routing the transducer cable around these wires.
WARNING:
Clamp the transducer cable to the transom close to the
transducer. This can prevent the transducer from entering the boat if it is knocked off at high speed.
If you need to drill a hole in the transom to pass the connector through,
the required hole size is 5/8". (If you intend to route an additional speed
or temp sensor cable through the same hole, you will need a 1" (25.4
mm) drill bit instead.
Caution:
If you drill a hole in the transom for the cable, make sure it is located above the waterline. After installation, be sure to seal the
hole with the same marine grade above- or below-waterline sealant used for the mounting screws.
7. Make a test run to determine the results. If the bottom is lost at
high speed, or if noise appears on the display, try sliding the transducer
bracket down. This puts the transducer deeper into the water, hopefully
below the turbulence causing the noise. Don't allow the transducer
bracket to go below the bottom of the hull!
Trolling Motor Bracket Installation
1. Attach the optional TMB-S bracket to the transducer as shown in the
following figure, using the hardware supplied with the transducer.
(Note: The internal tooth washer is supplied with the TMB-S.)
20
Bolt
Flat washer
Attach motor mounting bracket to transducer.
Internal tooth washer
Nut
TMB-S bracket
2. Slide the adjustable strap supplied with the TMB-S through the slot
in the transducer bracket and wrap it around the trolling motor. Position the transducer to aim straight down when the motor is in the water. Tighten the strap securely.
3. Route the transducer cable alongside the trolling motor shaft. Use
plastic ties (not included) to attach the transducer cable to the trolling
motor shaft. Make sure there is enough slack in the cable for the motor
to turn freely. Route the cable to the sonar unit and the transducer is
ready for use.
Transducer mounted on trolling motor, side view.
Transducer Orientation And Fish Arches
If you do not get good fish arches on your display, it could be because
the transducer is not parallel with the ground when the boat is at rest
in the water or at slow trolling speeds.
21
Partial fish arches
Transducer aimed
too far back
Full fish arch
Proper transducer angle
Transducer angles and their effects on fish arches.
Transducer aimed
too far forward
If the arch slopes up – but not back down – then the front of the transducer is too high and needs to be lowered. If only the back half of the
arch is printed, then the nose of the transducer is angled too far down
and needs to be raised.
NOTE:
Periodically wash the transducer's face with soap and water to remove any oil film. Oil and dirt on the face will reduce the sensitivity
or may even prevent operation.
22
Shoot-Thru-Hull Preparation
f
W
Hulls With Floatation Materials
The transducer installation inside a fiberglass hull must be in an area
that does not have air bubbles in the resin or separated fiberglass layers. The sonar signal must pass through solid fiberglass. A successful
transducer installation can be made on hulls with flotation materials
(such as plywood, balsa wood or foam) between layers of fiberglass i
the material is removed from the chosen area. See the figure below.
ARNING:
Do not remove any material from your inner hull unless
you know the hull's composition. Careless grinding or
cutting on your hull can result in damage that could sink
your boat. Contact your boat dealer or manufacturer to
confirm your hull specifications.
Fill with polyester resin
Flotation material
Epoxy to hull first
Epoxy the transducer to a solid portion of the hull.
Fill with resin
Inner hull
Outer hull
For example, some (but not all) manufacturers use a layer of fiberglass,
then a core of balsa wood, finishing with an outer layer of fiberglass.
Removing the inner layer of fiberglass and the balsa wood core exposes
the outer layer of fiberglass. The transducer can then be epoxied directly to the outer layer of fiberglass. After the epoxy cures for 24
hours, fill the remaining space with polyester resin. When the job is
finished, the hull is watertight and structurally sound. Remember, the
sonar signal must pass through solid fiberglass. Any air bubbles in the
fiberglass or the epoxy will reduce or eliminate the sonar signals.
23
Testing Determines Best Location
Ideally, the shoot-thru transducer should be installed as close to the
transom as possible, close to the centerline. This will give you the best
performance during high speed maneuvers.
Transducer location
(high speed)
Shoot-thru-hull transducer locations for
high speed or trolling speed operation.
Transducer location
(trolling speed)
To choose the proper location for shoot-thru-hull mounting, follow these
testing procedures: (You may need a helper to complete these steps.)
1. Anchor the boat in about 30 feet of water. Add a little water to the
sump of the boat. Plug the transducer into the sonar unit, turn it on, then
hold the transducer over the side of the boat in the water. Adjust the sensitivity and range controls until a second bottom echo is seen on the display. (You'll need to turn off Auto Sensitivity, Auto Depth Range and
ASP. Try a range setting that is two to three times the water depth. The
harder (more rocky) the bottom, the easier it will be to get a second bottom signal.) Don't touch the controls once they've been set.
24
Second bo
t
tom
True bo
t
tom
Manual range setting
Example of a second bottom signal. Unit is in 30 feet of water, with
range set at 80 feet and sensitivity set at 87 percent.
2. Next, take the transducer out of the water and place it in the water in
the sump of the boat, face down. (The transducer face is shown in the
figure on the following page.) Notice how the signal strength decreases.
The second bottom signal will probably disappear and the bottom signal
intensity will likely decrease.
3. Now move the transducer around to find the best location with the
strongest possible bottom signal. If you find a spot with an acceptable
bottom signal, mark the location and move on to step 4.
If you can't get an acceptable bottom signal, try turning up the sensitivity
by three or five keystrokes and then move the transducer around once
more. If you find a spot that works, mark it and move on to step 4.
If you have to turn up sensitivity by more than five keystrokes to get a
good signal, the transducer should be mounted on the outside of the
hull. This is especially true if you have to turn sensitivity all the way
up to get a decent bottom signal.
4. Most people can get good results by following steps 1 through 3, so this
step is optional. If you want to make an extra effort to be absolutely sure
that your selected location will work under all conditions, make a test run
25
with the boat on plane and observe the bottom signal. You'll need to figure
A
some way to prop the transducer into position while you make your test
run. (A brick or two might be sufficient to hold it in place.)
5. When you're satisfied with a location, mark it and proceed with
the installation.
Shoot-thru-hull Installation
If you are installing the transducer on a hull with floatation material
sandwiched within the hull, refer to the text "Hulls With Flotation Materials" beginning on page 23.
1. Make sure the area is clean, dry and free of oil or grease, then sand
both the inside surface of the hull and the face of the transducer with
100 grit sandpaper. The sanded hull area should be about 1-1/2 times
the diameter of the transducer. The surface of the hull must be flat so
the entire transducer face is in contact with the hull prior to bonding.
fter sanding, clean the hull and transducer with rubbing alcohol to
remove any sanding debris.
Spread epoxy here
Sand this surface
(unit's face)
Orient the Skimmer
with the nose facing
the bow of the boat.
To bow
Epoxy transducer to hull.
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WARNING:
Use only the epoxy available from LEI. It has been for-
mulated to work with these installation procedures.
Other epoxy types may be too thin or may not cure to the
right consistency for optimum transducer performance.
2. The epoxy consists of the epoxy itself and a hardener. Remove the
two compounds from the package and place them on the paper plate.
Thoroughly stir the two compounds together until the mixture has a
uniform color and consistency. Do not mix too fast or bubbles will form
in the epoxy. After mixing, you have 20 minutes to complete the installation before the epoxy becomes unworkable.
Spread a thin layer of epoxy (about 1/16" or 1.5 mm thick) on the face of
the transducer as shown in the previous figure. Make sure there are no
air pockets in the epoxy layer! Then, apply the remaining epoxy to the
sanded area on the hull.
3. Press the transducer into the epoxy, twisting and turning it to force
any air bubbles out from under the transducer face. Stop pressing when
you bottom out on the hull. When you're finished, the face of the transducer should be parallel with the hull, with a minimum amount of epoxy between the hull and transducer.
4. Apply a weight, such as a brick, to hold the transducer in place while
the epoxy cures. Be careful not to bump the transducer while the epoxy
is wet. Leave the weight in place for a minimum of three hours. Allow
the epoxy to cure for 24 hours before moving the boat.
5. After the epoxy has cured, route the cable to the sonar unit and it's
ready to use.
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Speed/Temperature Sensors
The FishEasy 320C can accept as many as two temperature sensors,
which can be used to monitor the temperature of surface water, a live well
or some other location. These units can accept an optional speed sensor
for showing speed and distance traveled. However, you can only use one
accessory at a time. If you would like to use a speed sensor and a secondary temperature sensor at the same time, you will need a combination
device.
NOTE:
If a second temp sensor is used, it must be the model TS-2U. This
model has a fixed electronic "address" which designates it as the
second of two temp sensors.
Primary temp sensor
built into transducer
TS-2U secondary
external temp sensor
shown as T2
Full Chart page showing dual temperature display.
See the following charts for sample sensor combinations and cable connections.
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