Furuno CSH-5L, CSH-8L User Manual

COLOR SCANNING SONAR

CSH-5L/CSH-8L

9-52 Ashihara-cho,9-52 Ashihara-cho,

00080940402

**00080940402

00080940402

**00080940402

OME

13190

**OME

13190

**OME

13190

**OME

13190

Nishinomiya, JapanNishinomiya, Japan

Telephone :Telephone : 0798-65-21110798-65-2111 faxfax 0798-65-42000798-65-4200

ll rights reserved.

PUB.No.PUB.No. OME-13190OME-13190

Printed in JapanPrinted in Japan

Your Local Agent/DealerYour Local Agent/Dealer

IRST EDITION :

IRST EDITION : DECDEC .. 20022002

CC :: JULJUL .. 06, 200406, 2004

(( YOSHYOSH ))

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 *

* O M E 1 3 1 9 0 C 0 0 ** O M E 1 3 1 9 0 C 0 0 *

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.

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.

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.

CAUTION

Do not exceed 18 knots with the transducer 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 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.

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

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

1.6.3 Sonar menu description ................................................................................. 1-16

2. FINE TUNING THE SONAR PICTURE

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

....................................................................2-1

iii

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

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

MENU TREE ........................................................................................................AP-1

SPECIFICATIONS................................................................................................SP-1

INDEX .................................................................................................................. IN-1

FOREWORD

A Word to the Owner of th e 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.

SYSTEM CONFIGURATION

Monitor (MU-150C, etc., Max. 2)

Motion Sensor

MS-100

Processor Unit CSH-5210

Control Unit CSH-5211

Transceiver Unit CSH-5130

Navaid Current Indicator AD Converter Speed Log E/S Interface Remote Controller Speaker

Hull Unit CSH-5040, 600 mm stroke CSH-5041, 400 mm stroke

DC/AC

Inverter

TR-2451

24 VDC

Ship's Mains 100 V AC/ 115 V AC/ 200 V AC/ 220 V AC/ 240 V AC , 1

, 50-60Hz

Pre-amplifier Unit CSH-5020

: Standard Supply : Option : User Supply

System configuration of CSH-5L

vii

Processor Unit

Monitor (MU-150C, etc., Max. 2)

CSH-5210

Control Unit CSH-5211

Motion Sensor

MS-100

DC/AC

Inverter

TR-2451

24 VDC

Transceiver Unit CSH-8030

Ship's Mains 100 V AC/ 115 V AC/ 200 V AC/ 220 V AC/ 240 V AC , 1

, 50-60Hz

Junction Box

CSH-1700

Navaid Current Indicator AD Converter Speed Log E/S Interface Remote Controller Speaker

Hull Unit CSH-8040, 600 mm stroke CSH-8041, 400 mm stroke

: Standard Supply : Option : User Supply

System configuration of CSH-8L

viii

1. OPERATIONAL OVERVIEW

1.1 Control Unit

All operations are carried out from the control unit. All controls quickly respond to the operator’s command and the associated reaction can be seen on the screen almost immediately.

Lowers the transducer.

Raises the transducer.

Turns power

on/off.

POWER

F1 F2

F3 F4

Execute assigned program; register function key program.

Sets transducer tilt angle.

RANGE GAIN

Adjusts receiver sensitivity; chooses menu option.

Chooses display range; chooses menu item.

TILT

Trackball Positions trackball mark.

EVENT

FISH

ALARM

ZONE

TARGET LOCK

STABILIZER

DELETE

MARK

R/B

OFF

CENTER

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.

Control unit

1-1

1. OPERATIONAL OVERVIEW

1.2 Remote Controller (option)

The remote controller provides armchair control of the tilt, range, gain and menu functions.

Hole for hanging

TILT Control

: Increases tilt angle.

: Decreases tilt angle.

RANGE Control

: Increases range.

: Decreases range.

Chooses menu item in menu operation.

GAIN Control

: Increases gain.

: Decreases gain.

Chooses menu option in menu operation.

Remote controller

1-2

1.3 Basic Operati ng 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.

1. OPERATIONAL OVERVIEW

START UP TEST

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

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

XX.XX = Program Version No.

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.

1-3

1. OPERATIONAL OVERVIEW

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

[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 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 AUT O TRAIN : ON OFF TRAIN SECTOR : ±10 AUT O TILT : ON OFF TILT ANGLE :±2-10 TRANSMISSION : ON OFF AUDIO V OLUME : 10 ASSIGN SETTING : F1 KEY F2 KEY F3 KEY F4 KEY ASSIGN MENU : EXECUTE

:1 2 3 4

° ±20°±

° ±

(RANGE CTRL: U/D, GAIN CTRL: L/R)

° ±60°

4-14

°±

6-20

° ±

10-26

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.

1-4

1.3.4 Adjusting backlighting of control unit

1. Press the [MENU] k ey to open the menu.

2. Use the [RANGE] control to choose [ME NU MODE] at the t op of the screen.

3. Use the [GAIN] control to choose SYSTEM.

1. OPERATIONAL OVERVIEW

SYSTEM MENU

[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 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

TEST : SINGLE CONTI PANEL COLOR

SET TO DEFAULT : EXECUTE

LOG/GYRO

NEDERLND FRANCAIS ITALIANO

NORSK

: PATTERN SIO ECHO-1 ECHO-2

ECHO-3 ECHO-4

(RANGE CTRL: U/D, GAIN CTRL: L/R)

CURRENT NAV DATA

GYRO+NAV

(KOREAN)

PRESS [MENU] KEY TO EXIT

System menu

4. Use the [RANGE] control to choose DIMMER.

5. Operate the [GAIN] control adj us t the dimmer. The s etting range is 0-10. Adjust t he c ontrol clockwise to incr eas e bac k lighting; counterclockw ise to decrease it.

6. Press the [MENU] k ey to close the m enu.

1-5

1. OPERATIONAL OVERVIEW

1.3.5 Choosi ng 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)

COMBI-1 (Sonar + Audio)

COMBI-2 (Sonar + echosounder)

This mode is useful for detecting and tracking fish schools. Navigation data can be displayed in the text window, with connection of appropriate sensors.

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.

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

Sonar display

Range and bearing marks

Text window

Audio display

Sonar display

Text window

Echosounder display

Sonar display

1-6

Normal mode display (sonar display)

1. OPERATIONAL OVERVIEW

733 708 189

B 60S

500

SHIP SPEED

R 1000

SHIP COURSE

T 15 (15)

LAT/LON

G 10.0

132°12.150E

DEPTH

WATER CURRENT

 

WATER TEMP

12.4 kt

246

32°52.150N

126m

C1 1.2kt 342

C2 0.8kt 298

C3 0.4kt 256

12.4°C

20min 10 0



Text Window For description see Chapter 5.

Sonar display

COMBI-1 display (sonar display + audio display)

517 500 134

B 60S

Range & Bearing Marks

500

R 517 B 60S

R 1000 T 15 (15) G 10.0

Range and bearing marks data

SHIP SPEED

SHIP COURSE



LAT/LON

132°12.150E

WATER TEMP

12.4°C

12.4 kt 246

°

32°52.150N

20min 10 0

Range Scale

DEPTH

126m

500 -

1000-

Text Window For description see Chapter 5.

COMBI-1 display (sonar display + audio display)

1-7

1. OPERATIONAL OVERVIEW

COMBI-2 display (sonar display + echosounder display)

545 472 272

B 60S

500

R 1000

T 30 (30) G 10.0

SHIP SPEED

SHIP COURSE



LAT/LON

132°12.150E

WATER TEMP

12.4°C

Fish School

COMBI-2 display (sonar display + echosounder display)

1.3.6 Choosi ng the di splay range

12.4 kt 246

°

32°52.150N

Depth Scale

Bottom

DEPTH

20min 10 0

126m

100 -

200 -

Text Window For description see Chapter 5.

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

BOTTOM

Bottom

Surface

Range indicated

Range displayed

on the screen.

on screen

Detection range

1-8

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.

1. OPERATIONAL OVERVIEW

Gain too low

Examples of proper and improper gain

Gain proper

Gain too high

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.

1-9

1. OPERATIONAL OVERVIEW

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.

Transducer

+55

0°Horizontal direction (tilt: 0)

Tilt angle 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.

Tilt range

1-10

Range and tilt angle

1. OPERATIONAL OVERVIEW

Range (m) ±2-10°

50, 85, 100, 150, 200, 250, 300, 350 400, 450, 500 600, 800 1000, 1200, 1600

±10°

±8° ±6° ±2°

±4-14°

±14° ±12° ±10°

±4°

±6-20°

±20° ±16° ±14°

±6°

±10-26°

±26° ±20° ±20° ±10°



For example, when the [RANGE] control, [TILT] lever and automatic tilt are set to

1000 m, 8

and ±2-10° respectively, the tilt angle changes at each transmission

as follows:

° → 10° → 8° → 6° → 8° → ...

Tilt Angle

Auto tilt concept

1-11

1. OPERATIONAL OVERVIEW

1.4.2 Bottom and tilt angle

Finding the proper tilt angle is of utmost importance when searching for fish, especially in coastal water fishing, where the depth of the fishing ground is from 50-100 m. In this type of fishing ground it is imperative that the bottom echo be always displayed to properly distinguish between fish and the bottom. When selecting a tilt angle, keep the following points in mind.

Case 1: Tilt angle 30 to 40 degrees

This tilt angle uses the full beamwidth to receive echoes, thus the entire bottom echo is displayed. Fish echoes may be hidden in the bottom echo.

Case 2: Tilt angle 10 to 20 degrees

This tilt angle receives bottom echoes within the bottom half of the beam. Fish echoes astern of the bottom echo are displayed.

Case 3: Tilt angle 0 to 5 degrees

This tilt angle may or may not display returning echoes. Fish echoes near the bottom echo are displayed.

1.4.3 How to discriminate fish echoes from the bottom

The following figure illustrates how two fish schools (a) and (b) are displayed on screen using three different tilt angles.

Case 1: Tilt angle 30 to 40 degrees Fish school is obscured by the bottom echo. Case 2: Tilt angle 10 to 20 degrees Fish school is located above the bottom echo (midwater). Case 3: Tilt angle 0 to 5 degrees Fish school is located close to the bottom echo.

Case 1 Case 2 Case 3

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Fish school (a) Fish school (a) Fish school (a)

Bottom

Bottom Bottom

Case 1 Case 2 Case 3

(b)

How to discriminate fish echoes from bottom

1.4.4 Points to consider

•

As a general rule of thumb, a vertically distributed fish school is a better sonar target than a horizontally one, since it reflects the transmitted pulse back toward to the source.

•

In case 3, both fish schools (a) and (b) are presented. Generally speaking, however, midwater fish schools tend to be larger than bottom fish schools and they are often displayed near the bottom on the sonar screen.

•

Detection of bottom fish is difficult if they are not distributed vertically.

1.4.5 Tilt angle for surface fish

Sound emitted from the sonar transducer forms a circle-shaped beam with a width of approximately 15°* (-6dB in the vertical direction). The tilt angle is indicated by the angle between the center line of the beam and the horizontal plane. Then, if the tilt angle is set to 0 degrees, the center line is parallel with the sea surface and one half of the emitted sound goes upward toward the sea surface.

This causes a half of the emitted sound to be reflected back toward the transducer and displayed on the screen as sea surface reflections. When the sea is calm, since the sound is reflected just like a light hitting a mirror at a narrow incident angle, it propagates away and the sea surface reflections become negligible.

However if the sea is not calm enough, they will become dominant and will interfere with observation of wanted echoes. To minimize these sea surface reflections and to search surface fish schools effectively, the tilt angle is usually set to 5-6 degrees so that the upper portion of the beam becomes almost parallel with the sea surface. When the sea is rough, it is often set to a little larger angle.

* 15° for CSH-5L, 13° for CSH-8L

1. OPERATIONAL OVERVIEW

Sea surface

Tilt angle 0°

Tilt angle 5-6°

Tilt angle and surface fish (example: CSH-5L)

15°

Sea surface

15°

1-13

1. OPERATIONAL OVERVIEW

1.4.6 Suitable tilt angle

The table below shows the estimated detection range for tilt angles of 0, 5, 10 and 15 degrees. Refer to the table to find suitable tilt angle from depth and detection range.

Tilt angle setting

100

(200)

200

(400)

300

(600)

Detection range (m)

400

(800)

0°

20(40) 40(80)

60(120) 80(160)

100(200)

Depth (m)

200(400)

Vertical width of sonar beam

15°

13°

100 m

26 m

23 m

200 m

52 m

46 m

300 m

78 m

300 m

68 m

5°

10°

15°

CSH-5L

CSH-8L

Depth, detection range and tilt angle

1.5 Finding Range and Bearing to a Target

Operate the trackball to place the trackball mark on the target you want to measure the range and bearing. The slant range, horizontal range, bearing and depth to the target appear at the upper left corner of the sonar display.

î

TRACKBALL DATA

Slant range from own ship to trackball mark

Horizontal range from own ship to trackball mark

Depth to trackball mark

B Relative from own ship to trackball mark* * = Relative bearing format may be selected with

OTHER MARKS on the MARKS menu.

Location of trackball data

è ê

Trackball mark

Own ship mark

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1.6 Sonar Menu Overview

This equipment has four menus: sonar menu, sounder menu, marks menu and system menu. Of the four menus, the SONAR menu is the one you will use most often.

Note that the gain and range cannot be adjusted while the menu is displayed.

1.6.1 Operating procedure

1. Press the [MENU] key. The last-used menu appears.

2. Use the [RANGE] control to choose [MENU MODE] at the top of the screen.

3. Use the [GAIN] control to choose SONAR to display the SONAR menu.

1. OPERATIONAL OVERVIEW

SONAR MENU

[MENU MODE] : SONAR SOUNDER MARKS SYSTEM

:1 2 3 4

° ±20°±

° ±

(RANGE CTRL: U/D, GAIN CTRL: L/R)

° ±60°

4-14

°±

6-20

° ±

10-26

PRESS [MENU] KEY TO EXIT

Sonar menu

1-15

1. OPERATIONAL OVERVIEW

4. Use the [RANGE] control to choose a menu item. The selected item is

highlighted.

Note: Items displayed in red are locked to prevent accidental change of

setting. When any of those items are selected the display shown below appears, to ask you if you are sure to change the setting. To change the setting, use the [GAIN] control to choose YES and then press the [EVENT] key. The items colored in red turn green to show that they are available for adjustment.

SELECTED MENU IS LOCKED ARE YOU SURE TO CHANGE? NO YES PRESS [EVENT] KEY TO EXECUTE

5. Use the [GAIN] control to choose the option desired.

6. To close the menu, press the [MENU] key.

1.6.3 Sonar menu descripti on



Description of sonar menu

Item Description Ref. page

DISPLAY MODE Chooses the display mode among, COMBI-1

(NORM + Audio), NORM (Sonar) and COMBI-2 (NORM + Echosounder).

TX OUTPUT Adjusts transmitter power. 2-4

PULSE LENGTH Chooses pulse length. 2-3

TX CYCLE Removes interference caused by other sonars

operating nearby.

TVG NEAR Adjusts receiving gain within 300 m. 2-1

TVG FAR Adjusts receiver gain beyond 300 m. 2-1

AGC Automatically reduces the receiver gain only

against strong echoes such as the bottom or a large fish school, to suppress bottom tail.

2ND AGC Suppresses bottom echo. 2-3

NOISE LIMITER Suppresses unwanted reflections caused by

sediments in water, plankton or ship’s noise.

COLOR CURVE Adjusts echo presentation color curve against

strong reflections. In setting “1,” for example, weak to strong signals are averaged and displayed to obtain a balanced picture. The larger the setting the better the resolution on weak signals.

1-6

2-6

2-2

2-5

—

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1. OPERATIONAL OVERVIEW

Description of sonar menu (con’t from previous page)

Item Description Ref. page

COLOR RESPONSE

DELETE COLOR

ECHO AVERAGE

INT REJECT Rejects random noise and sea surface reflections in

HOR BEAMWIDTH

VER BEAMWIDTH

COLOR Chooses display colors for the sonar and audio

ERASE MARKS Chooses the mark type to erase collectively, from

ALARM LEVEL Sets echo strength level which triggers the fish

AUTO TRAIN Turns automatic transducer training on or off. 3-3

TRAIN SECTOR Chooses train sector in automatic training. 3-3

AUTO TILT Turns automatic tilt on or off. 1-10

TILT ANGLE Sets automatic tilt range. 1-10

TRANSMISSION Turns transmission on or off. 1-4

AUDIO VOLUME

ASSIGN SETTING

ASSIGN MENU Displays programs assigned to function keys. 3-12

Adjusts color level against strong reflections. The higher the setting, the more the red color is displayed and weak level colors are displayed as is, thereby giving the appearance that the gain has been raised.

Erases desired echo level from the display. 2-7

Specifies how long to leave afterglow on the screen. 2-7

rough sea conditions.

Sets horizontal beamwidth for wide or narrow. 2-7

Sets vertical beamwidth for wide or narrow. 2-7

displays, among four choices. Choose a display color to match your environment or fishing objective.

track, own ship, event and fish. For track, 10% of the oldest track is erased.

alarm. The lower the setting the weaker the echo which triggers the alarm.

Sets audio volume of loudspeaker. 3-3

Chooses function key to program. 3-10

—

2-5

—

3-9

3-4

1-17

+ 62 hidden pages

Furuno CSH-5L, CSH-8L User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INSTRUCTIONS

TABLE OF CONTENTS

FOREWORD

SYSTEM CONFIGURATION

1. OPERATIONAL OVERVIEW

1.1 Control Unit

1.2 Remote Controller (option)

1.3 Basic Operati ng Procedure

1.4 Setting the Tilt Angle

1.5 Finding Range and Bearing to a Target

1.6 Sonar Menu Overview