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COLOR SCANNING SONAR
CSH-5L/CSH-8L
Back
Your Local Agent/DealerYour Local Agent/Dealer
9-52 Ashihara-cho,9-52 Ashihara-cho,
Nishinomi
y
a 662-8580, JAPANNishinomi
y
a 662-8580, JAPAN
Tele
p
hone :Tele
p
hone : 0798-65-21110798-65-2111
FaxFax 0798-65-42000798-65-4200
::
F
IRST EDITION :
F
IRST EDITION :DECDEC.. 20022002
Printed in JapanPrinted in Japan
A
ll ri
g
hts reserved.
A
ll ri
g
hts reserved.
C1C1 ::OCTOCT.. 13, 200413, 2004
Pub. No.Pub. No. OME-13190OME-13190
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00080940402
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(( YOTAYOTA ))
CSH-5L/8LCSH-5L/8L
* 0 0 0 8 0 9 4 0 4 0 2 ** 0 0 0 8 0 9 4 0 4 0 2 *
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13190
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* O M E 1 3 1 9 0 C 1 0 ** O M E 1 3 1 9 0 C 1 0 *
i
SAFETY INSTRUCTIONS
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel
should work inside the
equipment.
Immediately turn off the power at the
switchboard if water leaks into the
equipment or something is dropped in
the equipment.
Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury can
result.
Do not place liquid-filled containers on
the top of the equipment.
Fire or electrical shock can result if a liquid
spills into the equipment.
Immediately turn off the power at the
switchboard if the equipment is emitting
smoke or fire.
Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.
Make sure no rain or water splash leaks
into the equipment.
Fire or electrical shock can result if water
leaks in the equipment.
WARNING
Use the proper fuse.
Fuse rating is shown on the equipment.
Use of a wrong fuse can damage the
equipment.
Do not operate the equipment with wet
hands.
Electrical shock can result.
ii
CAUTION
Do not exceed 18 knots with the trans-
ducer lowered and do not exceed 16
knots when lowering or raising the
transducer.
The transducer may become damaged.
Turn off the hull unit before using the
hand crank.
Bodily injury may result if the power is not
turned off.
The zinc block attached near the
transducer must be replaced yearly.
The junction between the transducer and
main shaft may corrode, which can result
in loss of the transducer or water leakage
iinside the ship.
WARNING
To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.
Name: Warning Label (1)
Type: 86-003-1011-1
Code No.: 100-236-231
WARNING LABEL
A warning label is attached to all units
of the system. Do not remove any label.
If a label is missing or damaged, contact
a FURUNO agent or dealer about
replacement.
iii
TABLE OF CONTENTS
FOREWORD .................................................................................................................vi
SYSTEM CONFIGURATION.......................................................................................vii
1. OPERATIONAL OVERVIEW................................................................................ 1-1
1.1 Control Unit................................................................................................................1-1
1.2 Remote Controller (option).........................................................................................1-2
1.3 Basic Operating Procedure........................................................................................1-3
1.3.1 Turning on the power.......................................................................................1-3
1.3.2 Lowering the transducer ..................................................................................1-3
1.3.3 Transmitting.....................................................................................................1-4
1.3.4 Adjusting backlighting of control unit................................................................1-5
1.3.5 Choosing a display mode.................................................................................1-6
1.3.6 Choosing the display range..............................................................................1-8
1.3.7 Adjusting the gain............................................................................................1-9
1.3.8 Retracting the transducer, turning off the power...............................................1-9
1.4 Setting the Tilt Angle................................................................................................1-10
1.4.1 Automatic tilt on/off ........................................................................................1-10
1.4.2 Bottom and tilt angle......................................................................................1-12
1.4.3 How to discriminate fish echoes from the bottom...........................................1-12
1.4.4 Points to consider..........................................................................................1-13
1.4.5 Tilt angle for surface fish................................................................................1-13
1.4.6 Suitable tilt angle ...........................................................................................1-14
1.5 Finding Range and Bearing to a Target....................................................................1-14
1.6 Sonar Menu Overview .............................................................................................1-15
1.6.1 Operating procedure......................................................................................1-15
1.6.2 Sonar menu description.................................................................................1-16
2.
FINE TUNING THE SONAR PICTURE
...................................................................... 2-1
2.1 Eliminating Unwanted Echoes ...................................................................................2-1
2.2 Displaying Surface Fish Clearly.................................................................................2-2
2.3 Suppressing Bottom Tail............................................................................................2-2
2.3.1 AGC.................................................................................................................2-2
2.3.2 Pulse length.....................................................................................................2-3
2.3.3 2ND AGC.........................................................................................................2-3
2.4 Suppressing Bottom and Sea Surface Reflections in Shallow Fishing Grounds.........2-4
2.5 Rejecting Sonar Interference and Noise.....................................................................2-5
2.5.1 Identifying noise source...................................................................................2-5
2.5.2 Rejecting noise with the interference rejector...................................................2-5
2.5.3 Rejecting noise with the noise limiter...............................................................2-5
2.5.4 Rejecting interference with TX cycle................................................................2-6
2.6 Choosing Beamwidth.................................................................................................2-7
2.6.1 Horizontal beamwidth ......................................................................................2-7
2.6.2 Vertical beamwidth...........................................................................................2-7
2.7 Deleting Weak Echoes...............................................................................................2-7
2.8 Echo Averaging..........................................................................................................2-7
iv
3.
ADVANCED SONAR OPERATION ...................................................................3-1
3.1 Tracking a Fish School (target lock)........................................................................... 3-1
3.2 Detecting Fish Schools Aurally .................................................................................. 3-3
3.3 The Fish Alarm .......................................................................................................... 3-4
3.4 Measuring Fish School Speed ................................................................................... 3-5
3.4.1 Entering a fish mark......................................................................................... 3-5
3.4.2 Deleting individual fish marks .......................................................................... 3-6
3.5 Relocating Fish School for Easy Observation ............................................................ 3-6
3.6 Event Mark, Own Ship Position Mark......................................................................... 3-7
3.6.1 Event mark ...................................................................................................... 3-7
3.6.2 Entering an own ship position mark ................................................................. 3-8
3.6.3 Deleting an event mark.................................................................................... 3-8
3.7 Collectively Deleting Marks........................................................................................ 3-9
3.8 Function Keys (F1-F4)............................................................................................. 3-10
3.8.1 Operating the function keys ........................................................................... 3-10
3.8.2 Programming for fishing ground or target fish ................................................ 3-10
3.8.3 Programming specific function....................................................................... 3-11
3.8.4 Confirming function key program ................................................................... 3-12
3.9 Suppressing Effects of Pitching and Rolling (Stabilizer) ........................................... 3-13
4.
ECHOSOUNDER MODE ...................................................................................4-1
4.1 Choosing the Range.................................................................................................. 4-1
4.2 Adjusting the Gain ..................................................................................................... 4-2
4.3 Picture Advance Speed.............................................................................................. 4-3
4.4 Measuring Depth ....................................................................................................... 4-3
4.5 Suppressing Interference........................................................................................... 4-4
4.6 Suppressing Low Level Noise.................................................................................... 4-4
4.7 Erasing Weak Echoes ............................................................................................... 4-5
4.8 Other Items on the Sounder Menu............................................................................. 4-6
5.
MARKS AND DATA ...........................................................................................5-1
5.1 Marks and Data on the Normal Display...................................................................... 5-1
5.2 Marks and Data on the Echosounder and Audio Displays.......................................... 5-5
6.
INTERPRETING THE DISPLAY ........................................................................6-1
6.1 Bottom Echo.............................................................................................................. 6-1
6.2 Fish School................................................................................................................ 6-2
6.3 Sea Surface Reflections ............................................................................................ 6-3
6.4 Wake ......................................................................................................................... 6-3
6.5 False Echo by Sidelobe ............................................................................................. 6-4
6.6 Noise and Interference .............................................................................................. 6-4
7.
MARKS AND SYSTEM MENUS........................................................................7-1
7.1 MARKS Menu............................................................................................................ 7-1
7.2 SYSTEM Menu.......................................................................................................... 7-3
v
8. MAINTENANCE, TROUBLESHOOTING............................................................ 8-1
8.1 General Maintenance.................................................................................................8-1
8.2 Cleaning the Equipment.............................................................................................8-1
8.3 Hull Unit Maintenance................................................................................................8-2
8.3.1 Lubrication points, zinc plate............................................................................8-2
8.3.2 Manually raising the transducer.......................................................................8-3
8.4 Fuse Replacement.....................................................................................................8-4
8.5 Fan Replacement ......................................................................................................8-4
8.6 Troubleshooting.........................................................................................................8-5
8.7 Error Messages .........................................................................................................8-6
8.8 Diagnostic Tests.........................................................................................................8-7
8.8.1 Choosing a diagnostic test...............................................................................8-7
8.8.2 Description of diagnostic tests .........................................................................8-8
SPECIFICATIONS....................................................................................................SP-1
MENU TREE............................................................................................................ AP-1
INDEX .......................................................................................................................IN-1
vi
FOREWORD
A Word to the Owner of the CSH-5L/CSH-8L
Congratulations on your choice of the FURUNO CSH-5L/CSH-8L Color Scanning Sonar.
For over 50 years FURUNO Electric Company has enjoyed an enviable reputation for
innovative and dependable marine electronics equipment. This dedication to excellence is
furthered by our extensive global network of agents and dealers.
Your scanning sonar is designed and constructed to meet the rigorous demands of the
marine environment. However, no machine can perform its intended function unless
installed, operated and maintained properly. Please carefully read and follow the
recommended procedures for operation and maintenance.
We would appreciate hearing from you, the end-user, about whether we are achieving our
purposes.
Thank you for considering and purchasing FURUNO equipment.
Features
The FURUNO CSH-5L and CSH-8L Color Scanning Sonars are full-circle electronic
scanning sonars that detect and instantaneously display fish schools and underwater
conditions in 16 colors.
Some of the prominent features of the CSH-5L and CSH-8L are as follows:
Vivid 16-color display assists in recognition of bottom, and concentration and distribution
of fish schools.
Transducer frequency available in 55 kHz or 68 kHz for the CSH-5L and 85 kHz or 107
kHz for the CSH-8L.
Various fishing and navigation data (appropriate sensors required) keep operator abreast
of fishing and navigation conditions.
High power MOS FET transmitter ensures reliable operation under any condition.
Remote controller optionally available.
Four user-programmable function keys for quick set up of equipment according to fishing
conditions or specific function.
Target lock feature tracks fish school.
vii
SYSTEM CONFIGURATION
Processor Unit
CSH-5210
Transceiver Unit
CSH-5130
Control Unit
CSH-5211
Pre-amplifier Unit
CSH-5020
Hull Unit
CSH-5040, 600 mm stroke
CSH-5041, 400 mm stroke
Ship's Mains
100 VAC/
115 VAC/
200 VAC/
220 VAC/
240 VAC,
1
, 50-60Hz
DC/AC
Inverter
TR-2451
24 VDC
Motion Sensor
MS-100
Navaid
Current Indicator
AD Converter
Speed Log
E/S Interface
Remote Controller
Speaker
Monitor (MU-150C, etc., Max. 2)
: Standard Supply
: Option
: User Supply
System configuration of CSH-5L
viii
DC/AC
Inverter
TR-2451
24 VDC
: Standard Supply
: Option
: User Supply
Hull Unit
CSH-8040, 600 mm stroke
CSH-8041, 400 mm stroke
Transceiver Unit
CSH-8030
Motion Sensor
MS-100
Processor Unit
CSH-5210
Control Unit
CSH-5211
Navaid
Current Indicator
AD Converter
Speed Log
E/S Interface
Remote Controller
Speaker
Monitor (MU-150C, etc., Max. 2)
Junction Box
CSH-1700
Ship's Mains
100 VAC/
115 VAC/
200 VAC/
220 VAC/
240 VAC,
1
, 50-60Hz
System configuration of CSH-8L
1-1
1. OPERATIONAL OVERVIEW
1.1 Control Unit
All operations are carried out from the control unit. All controls quickly respond to
the operators command and the associated reaction can be seen on the screen
almost immediately.
F1 F2
F3 F4
RANGE GAIN
POWER
Turns power
on/off.
Chooses display
range; chooses
menu item.
Adjusts receiver
sensitivity; chooses
menu option.
Trackball
Positions trackball
mark.
Sets transducer
tilt angle.
Raises the transducer.
Lowers the transducer.
Execute assigned
program; register
function key program.
FISH: Inscribes fish mark.
EVENT: Inscribes event mark.
TARGET LOCK: Tracks trackball-selected
position.
R/B: Displays range and
bearing marks.
FISH ALARM: Turns fish alarm on/off.
STABILIZER: Compensates for affects
of ship's pitching and
rolling. (Requires Motion
Sensor MS-100.)
OFF CENTER: Shifts the display.
ALARM ZONE: Sets fish alarm zone.
DELETE MARK: Deletes selected mark.
MENU: Opens/closes menu.
TILT
FISH
EVENT
TARGET
LOCK
OFF
CENTER
STABI-
LIZER
DELETE
MARK
MENU
R/B
ALARM
ZONE
FISH
ALARM
Control unit
1. OPERATIONAL OVERVIEW
1-2
1.2 Remote Controller (option)
The remote controller provides armchair control of the tilt, range, gain and menu
functions.
Hole for hanging
Remote controller
1. OPERATIONAL OVERVIEW
1-3
1.3 Basic Operating Procedure
1.3.1 Turning on the power
1. Press the POWER switch on the control unit to turn on the power.
2. Turn on the monitor (user supply).
The system initiates the START UP test to check itself for proper operation.
The results are shown as OK or NG (No Good). For any NG, contact your
dealer for advice. After the test is completed, the last-used display appears.
MAIN-0 1050729-XX.XX F F
ROM = OK
RAM = OK
VRAM = OK
EEPROM (P.W) = OK
TRX 1050742-XX.XX 1050733-XX.XX
ROM = OK
RAM = OK
KEY-0 1050730-XX.XX F
ROM = OK
RAM = OK
XX.XX = Program Version No.
START UP TEST
Self test screen at start up (example: CSH-5L, 55 kHz transducer)
Note: The example screens shown in this manual may not match the screens
you see on your display. The screen you see depends on your system
configuration and equipment settings.
1.3.2 Lowering the transducer
Set ship’s speed under 16 knots and then press the [] switch. The lamp above
the switch flashes, and lights when the transducer is fully lowered. If you press
the [] switch when the speed is over 16 knots and the speed warning is turned
on in the SYSTEM menu, the message “Max allowable speed for extended
transducer is 16 kt. Max allowable speed during raising lowering transducer is 16
kt.” and the audio alarm sounds. Press the [R/B] key to silence the audio alarm.
CAUTION
Do not exceed 18 knots with the
transducer lowered; 16 knots when
lowering the transducer.
The transducer may become damaged.
Note: The audio alarm may be set to sound and a message displayed when the
ship’s speed goes higher than maximum allowable speed. For further
details, see SPEED MESSAGE on page 7-4.
1. OPERATIONAL OVERVIEW
1-4
1.3.3 Transmitting
TRANSMISSION in the SONAR menu is off in the default setting. If it is has
been set to ON, the procedure below is not necessary. When the transducer is
lowered, transmission starts and when it is raised transmission is stopped.
1. Press the [MENU] key to open the menu.
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.
3. Use the [GAIN] control to choose SONAR.
**
SONAR MENU
**
(RANGE CTRL: U/D, GAIN CTRL: L/R)
[MENU MODE] : SONAR SOUNDER MARKS SYSTEM
DISPLAY MODE : COMBI-1 NORM COMBI-2
TX OUTPUT : 8
PULSE LENGTH : 8
TX CYCLE : 10
TVG NEAR : 6
TVG FAR : 7
AGC : 2
2ND AGC : 1
NOISE LIMITER : 3
COLOR CURVE : 1 2 3 4
COLOR RESPONSE
:1 2 3 4
DELETE COLOR : 0
ECHO AVERAGE : 1
INT REJECT : 1
HOR BEAMWIDTH : WIDE NARROW
VER BEAMWIDTH : WIDE NARROW
COLOR : 1 234
ERASE MARKS : TRACK SHIP EVENT FISH
ALARM LEVEL : 9
AUTO TRAIN : ON OFF
TRAIN SECTOR : 10 20 40 60
AUTO TILT : ON OFF
TILT ANGLE : 2-10 4-14 6-20 10-26
TRANSMISSION : ON OFF
AUDIO VOLUME : 10
ASSIGN SETTING : F1 KEY F2 KEY F3 KEY F4 KEY
ASSIGN MENU : EXECUTE
PRESS [MENU] KEY TO EXIT
SONAR menu
4. Use the [RANGE] control to choose TRANSMISSION.
5. Use the [GAIN] control to choose ON. The sonar starts transmitting and the
sonar picture appears.
6. Press the [MENU] key to close the menu.
To turn off transmission, choose OFF at step 5. “TX OFF” appears at the top
right corner of the sonar display when the transmitter is turned off.
1. OPERATIONAL OVERVIEW
1-5
1.3.4 Adjusting backlighting of control unit
1. Press the [MENU] key to open the menu.
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.
3. Use the [GAIN] control to choose SYSTEM.
**
SYSTEM MENU
**
(RANGE CTRL: U/D, GAIN CTRL: L/R)
[MENU MODE] : SONAR SOUNDER MARKS SYSTEM
DIMMER : 10
DISP SELECT : TEMP CURRENT
HEADING ADJ : 0
AUTO RETRACT : OFF (OFF, 5-16kt)OFF
SPEED MESSAGE : ON OFF
EXT KP SYNC : OFF ON
AUTO TRAIN SPD : LOW HIGH
AUTO TILT SPD : LOW HIGH
UNIT : METERS FEET FATHOMS PA/BRA
SHIP'S SPD/BR :
LOG/GYRO
CURRENT NAV DATA
GYRO+NAV
LOG PULSE : 200 400
PORT1 BAUDRATE : 19200 9600 4800 2400
PORT1 FORMAT : NMEA CIF
PORT2 BAUDRATE : 19200 9600 4800 2400
PORT2 FORMAT : NMEA CIF
NAV DATA : GPS LC DR ALL
COMBI SCALE : RIGHT LEFT
SUB TEXT INDI : OFF ON
LANGUAGE : ENGLISH (JAPANESE) ESPANOL DANSK
NEDERLND FRANCAIS ITALIANO
(KOREAN)
NORSK
TEST : SINGLE CONTI PANEL COLOR
: PATTERN SIO ECHO-1 ECHO-2
ECHO-3 ECHO-4
SET TO DEFAULT : EXECUTE
PRESS [MENU] KEY TO EXIT
System menu
4. Use the [RANGE] control to choose DIMMER.
5. Operate the [GAIN] control adjust the dimmer. The setting range is 0-10.
Adjust the control clockwise to increase backlighting; counterclockwise to
decrease it.
6. Press the [MENU] key to close the menu.
1. OPERATIONAL OVERVIEW
1-6
1.3.5 Choosing a display mode
Three display modes are available: NORMAL, COMBI-1 and COMBI-2. To
choose the display mode, do the following:
1. Press the [MENU] key to open the menu. The last-used menu is displayed.
2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.
3. Use the [GAIN] key to choose SONAR.
4. Use the [RANGE] control to choose DISPLAY MODE.
5. Use the [GAIN] control to choose desired mode among COMBI-1, NORM
and COMBI-2.
6. Press the [MENU] key to close the menu.
Mode description
Mode Description Display
NORM
(Sonar
display)
This mode is useful for detecting
and tracking fish schools.
Navigation data can be displayed
in the text window, with
connection of appropriate
sensors.
Text window
Sonar display
COMBI-1
(Sonar +
Audio)
Sonar picture appears on the left
and the audio display at the lower
right side of the screen. This
mode is useful analyzing echoes
in a desired area.
To activate the COMBI-1 mode,
do the following:
1. Choose the COMBI-1 mode.
2. Use the trackball to place the
trackball mark (+) on the
bearing desired.
3. Press the [R/B] key. The range
and bearing marks are
inscribed on the sonar picture,
and the signal along the
bearing mark appears in the
audio display.
Text window
Audio display
Range and bearing marks
Sonar display
COMBI-2
(Sonar +
echosounder)
The sonar picture appears on the
left and the signal fed from the
echosounder at the lower right
side of the screen. This mode is
suitable for judging fish school
concentration.
Text window
Echosounder
display
Sonar display
1. OPERATIONAL OVERVIEW
1-7
Normal mode display (sonar display)
SHIP SPEED
12.4 kt
SHIP COURSE
246
LAT/LON
32 52.150N
132 12.150E
DEPTH
126m
WATER CURRENT
C1 1.2kt 342
C2 0.8kt 298
C3 0.4kt 256
WATER TEMP
12.4 C
20min 10 0
14
12
10
Text Window
For description see
Chapter 5.
500
W
R 1000
T 15
(15)
G 10.0
S
E
N
N
733
708
189
B 60S
Sonar display
COMBI-1 display (sonar display + audio display)
Text Window
For description see
Chapter 5.
500
W
R 1000
T 15
(15)
G 10.0
S
E
N
N
517
500
134
B 60S
-
R 517 B 60S
Range &
Bearing Marks
WATER TEMP
12.4 C
20min 10 0
14
12
10
Range Scale
Range and bearing marks data
SHIP SPEED
12.4 kt
DEPTH
126m
SHIP COURSE
246
LAT/LON
32 52.150N
132 12.150E
0
500 -
1000-
-
-
COMBI-1 display (sonar display + audio display)
1. OPERATIONAL OVERVIEW
1-8
COMBI-2 display (sonar display + echosounder display)
Text Window
For description see
Chapter 5.
500
R 1000
T 30
(30)
G 10.0
S
E
N
N
545
472
272
B 60S
-
-
Bottom
Fish School
Depth Scale
WATER TEMP
12.4 C
20min 10 0
14
12
10
SHIP SPEED
12.4 kt
DEPTH
126m
SHIP COURSE
246
LAT/LON
32 52.150N
132 12.150E
0
-
100 -
-
200 -
COMBI-2 display (sonar display + echosounder display)
1.3.6 Choosing the display range
The [RANGE] control chooses a display range. Each time the range is changed
the newly selected range appears in large characters for five seconds at the top
of the sonar display. The current range is always displayed at the top right corner
of the sonar display. The ranges (in meters) available are 50, 85, 100, 150, 200,
250, 300, 350, 400, 450, 500, 600, 800, 1000, 1200 and 1600.
SEA SURFACE
Range indicated
on the screen.
BOTTOM
Surface
Bottom
Range displayed
on screen
Detection range
1. OPERATIONAL OVERVIEW
1-9
1.3.7 Adjusting the gain
The [GAIN] control adjusts receiver sensitivity. It should be adjusted to see fish
echoes clearly with minimal noise on the screen. Too high a setting not only
causes excessive noise on the screen and makes it difficult to discriminate
wanted fish echoes but also causes bottom echoes to be painted in strong colors,
resulting that the echoes from bottom fish are masked by bottom reflections. A
setting between 3 and 7 is usually suitable. Each time the control is operated the
newly selected range appears in large characters for five seconds at the top of
the sonar display. The current range is always displayed at the top right corner of
the sonar display.
Gain too low
Gain proper
Gain too high
Examples of proper and improper gain
1.3.8 Retracting the transducer, turning off the power
1. Set speed under 16 knots and then press the [] switch to retract the
transducer. The lamp above the switch blinks while the transducer is being
retracted. Transmission is stopped automatically. If you press the [] switch
when the speed is over 16 knots and the speed warning is turned on in the
SYSTEM menu, the message “Max allowable speed for extended transducer
is 16 kt. Max allowable speed during raising lowering transducer is 16 kt.”
and the audio alarm sounds. Press the [R/B key to silence the audio alarm.
2. When the lamp above the [] switch lights, meaning the transducer is
completely retracted, press the [POWER] switch on the control unit to turn off
the power.
3. Turn off the monitor.
Note 1: The transducer is automatically retracted into the tank whenever the
power switch is turned off. However, for safety purposes, make it a habit
to retract the transducer before turning off the power.
Note 2: The equipment can be set to automatically retract the transducer when
the ship exceeds the operator-set speed. (Speed data required.) The
transducer may be retracted at a different speed than set if the speed
data is different from actual speed. In all cases, reduce the speed below
16 knots and then retract the transducer.
1. OPERATIONAL OVERVIEW
1-10
1.4 Setting the Tilt Angle
The tilt angle shows the direction to which the sound wave is emitted. When the
sound wave is emitted horizontally, it is said to be zero (0) degrees and when
emitted vertically, 90 degrees.
To set a tilt angle, operate the TILT lever for the desired angle while watching the
tilt angle indication at the top right corner of the sonar display. Each time the
lever is operated the newly selected tilt angle is displayed in large characters for
five seconds at the top of the sonar display. The tilt angle can be set in
one-degree steps within the range of 0 to 55 degrees.
+55
Transducer
Tilt angle range
0 Horizontal direction (tilt: 0)
Tilt range
1.4.1 Automatic tilt on/off
The automatic tilt feature automatically tilts the transducer within the tilt range
selected on the menu. This feature is useful for finding fish school center.
Automatic tilt becomes inoperative when the target lock feature is made active.
Disable the target lock feature to resume automatic tilt.
1. Press the [MENU] key to open the menu.
2. Operate the [RANGE] control to choose [MENU MODE] at the top of the
screen.
3. Operate the [GAIN] control to choose SONAR.
4. Operate the [RANGE] control to choose AUTO TILT.
5. Operate the [GAIN] control to choose ON.
6. Operate the [RANGE] control to choose TILT ANGLE.
7. Use the [GAIN] control to choose a tilt range among ±2-10°, ±4-14°, ±6-20°,
and ±10-26°. See the table on the next page for range and tilt angle.
8. Press the [MENU] key to close the menu. When auto tilt is on, auto tilting
begins with the range selected (at step 7), centered on the tilt angle set with
the TILT lever.
To turn off automatic tilt, choose OFF at step 5. Note that automatic tilt range
varies with the range in use.
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