Furuno CHS-5LMARK-2-55, CHS-5LMARK-2-68, CHS-8LMARK-2-107, CHS-8LMARK-2-85 Operator's Manual

OPERATOR'S MANUAL

SCANNING SONAR

CSH-5LMARK-2-55 CSH-5LMARK-2-68 CSH-8LMARK-2-85

Model

(PRODUCT NAME: FULL-CIRCLE SCANNING SONAR)

CSH-8LMARK-2-107

www.furuno.com

The paper used in this manual

9-52 Ashihara-cho,

A:JUN

2015

A3:JUL.22, 2016

Pub. No.

(

)

Nishinomiya, 662-8580, JAPAN

is elemental chlorine free.

・FURUNO Authorized Distributor/Dealer

MISU

CSH-5LM2/CSH-8LM2

Printed in Japan

OME-13500-A3

0 0 0 1 9 0 9 0 4 1 0

IMPORTANT NOTICES

Ni-Cd Pb

General

• This manual has been authored with simplified grammar, to meet the needs of international users.

• The operator of this equipment must read and follow the descriptions in this manual. Wrong operation or maintenance can cancel the warranty or cause injury.

• Do not copy any part of this manual without written permission from FURUNO.

• If this manual is lost or worn, contact your dealer about replacement.

• The contents of this manual and equipment specifications can change without notice.

• The example screens (or illustrations) shown in this manual can be different from the screens you see on your display. The screens you see depend on your system configuration and equipment settings.

• Save this manual for future reference.

• Any modification of the equipment (including software) by persons not authorized by FURUNO will cancel the warranty.

• All brand and product names are trademarks, registered trademarks or service marks of their respective holders.

How to discard this product

Discard this product according to local regulations for the disposal of industrial waste. For disposal in the USA, see the homepage of the Electronics Industries Alliance (http://www.eiae.org/) for the correct method of disposal.

How to discard a used battery

Some FURUNO products have a battery(ies). To see if your product has a battery(ies), see the chapter on Maintenance. Follow the instructions below if a battery(ies) is used.

In the European Union

The crossed-out trash can symbol indicates that all types of batteries must not be discarded in standard trash, or at a trash site. Take the used batteries to a battery collection site according to your national legislation and the Batteries Directive 2006/66/EU.

In the USA

The Mobius loop symbol (three chasing arrows) indicates that Ni-Cd and lead-acid rechargeable batteries must be recycled. Take the used batteries to a battery collection site according to local laws.

In the other countries

There are no international standards for the battery recycle symbol. The number of symbols can increase when the other countries make their own recycle symbols in the future.

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.

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.

Mandatory Action

Prohibitive Action

Warning, Caution

The operator must read the safety instructions before attempting to operate the equipment.

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury.

WARNING

CAUTION

SAFETY INSTRUCTIONS

CAUTIONCAUTION

Do not exceed 18 knots with the transducer lowered and do not exceed 15 knots when lowering or raising the transducer.

The transducer may become damaged.

Turn off the POWER switch on the hull unit before manually raising or lowering the transducer (with the ratchet wrench).

Bodily injury may result if the ratchet wrench rotates unexpectedly, because the raise/lower motor may start up.

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.

Name: Warning Label (1) Type: 86-003-1011-1 Code No.: 100-236-231

iii

FOREWORD ..................................................................................................................vii

SYSTEM CONFIGURATION ........................................................................................viii

TABLE OF CONTENTS..................................................................................................iv

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 ....................................................................................1-11

1.4.3 How to discriminate fish echoes from the bottom ........................................ 1-12

1.4.4 Points to consider.........................................................................................1-12

1.4.5 Tilt angle for surface fish..............................................................................1-12

1.4.6 Suitable tilt angle..........................................................................................1-13

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

3. ADVANCED SONAR OPERATION .......................................................................3-1

3.1 Tracking a School of Fish (target lock)....................................................................... 3-1

3.2 Detecting Schools of Fish Aurally ..............................................................................3-2

3.3 The Fish Alarm...........................................................................................................3-3

TABLE OF CONTENTS

3.4 Measuring Speed of School of Fish............................................................................3-4

3.4.1 Entering a fish mark .......................................................................................3-4

3.4.2 Deleting individual fish marks.........................................................................3-5

3.5 Relocating School of Fish for Easy Observation ........................................................3-5

3.6 Event Mark, Own Ship Position Mark.........................................................................3-6

3.6.1 Event mark .....................................................................................................3-6

3.6.2 Entering an own ship position mark ...............................................................3-7

3.6.3 Deleting an event mark ..................................................................................3-7

3.7 Collectively Deleting Marks ........................................................................................3-7

3.8 Function Keys (F1-F4)................................................................................................3-8

3.8.1 Operating the function keys............................................................................3-8

3.8.2 Programming for fishing ground or target fish................................................3-8

3.8.3 Programming specific function .......................................................................3-9

3.8.4 Confirming function key program ...................................................................3-9

3.9 Suppressing Effects of Pitching and Rolling (Stabilizer)...........................................3-10

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 .............................................................................4-5

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 School of Fish.............................................................................................................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

7.3 Activation Code ..........................................................................................................7-5

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

TABLE OF CONTENTS

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

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

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

FOREWORD

A Word to the Owner of the CSH-5LMARK-2/CSH-8LMARK-2

Congratulations on your choice of the FURUNO CSH-5LMARK-2/CSH-8LMARK-2 Color Scanning Sonar.

Since 1948, 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-5LMARK-2 and CSH-8LMARK-2 Color Scanning Sonars are full-circle electronic scanning sonars that detect and instantaneously display schools of fish and underwater conditions in 16 colors.

Some of the prominent features of the CSH-5LMARK-2 and CSH-8LMARK-2 are as follows:

• Vivid 16-color display assists in recognition of bottom, and concentration and distribution of schools of fish.

• Transducer frequency available in 55 kHz or 68 kHz for the CSH-5LMARK-2 and 85 kHz or 107 kHz for the CSH-8LMARK-2.

• 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 school of fish.

vii

SYSTEM CONFIGURATION

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

Processor Unit CSH-5210-A

Control Unit CSH-5211-A

Transceiver Unit CSH-5130-A-5L

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

Motion Sensor

MS-100

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

Pre-amplifier Unit CSH-5020-A

: Standard Supply : Option : User Supply

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

, 50-60Hz

DC/AC

Inverter

TR-2451

24 VDC

viii

System configuration of CSH-5LMARK-2

SYSTEM CONFIGURATION

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

Processor Unit CSH-5210-A

Transceiver Unit CSH-8030-A-8L

Control Unit CSH-5211-A

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

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

Junction Box

CSH-1700

Motion Sensor

MS-100

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

, 50-60Hz

DC/AC

Inverter

TR-2451

24 VDC

: Standard Supply : Option : User Supply

System configuration of CSH-8LMARK-2

SYSTEM CONFIGURATION

This page is intentionally left blank.

1. OPERATIONAL OVERVIEW

F1 F2

F3 F4

RANGE GAIN

Color Scanning Sonar

POWER

Lowers the transducer.

Raises the transducer.

Turns power

on/off.

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.

Execute assigned program; register function key program.

Chooses display range; chooses menu item.

Adjusts receiver sensitivity; chooses menu option.

Trackball Positions trackball mark.

Sets the tilt angle.

TILT

FISH

EVENT

TAR GET LOCK

OFF

CENTER

STABILIZER

DELETE

MARK

R/B

ALARM

ZONE

FISH

ALARM

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.

Control unit

1-1

1. OPERATIONAL OVERVIEW

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.

1.2 Remote Controller (option)

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

Remote controller

1-2

1.3 Basic Operating Procedure

CAUTIONCAUTION

Do not exceed 18 knots with the transducer lowered; 16 knots when lowering the transducer.

The transducer may become damaged.

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 1050842-xx.xx 1050843-xx.xx ROM = OK RAM

FPGA1 1050846-xx.xx FPGA2 1050847-xx.xx

TRX 1050850-xx.xx 1050###-xx.xx ROM = OK RAM

1050951-xx.xx F FF

= OK

VRAM = OK

= OK

1. OPERATIONAL OVERVIEW

xx.xx = Program Version No.START UP

###: 854 (CSH-8LMARK-2, 85kHz) 855 (CSH-8LMARK-2, 107kHz) 861 (CSH-5LMARK-2, 55kHz) 862 (CSH-5LMARK-2, 68kHz)

KEY-0 1050730-xx.xx F ROM = OK RAM

= OK

Self test screen at start up

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 kn. Max allowable speed during raising lowering transducer is 16 kn." and the audio alarm sounds. Press the R/B key to silence the audio alarm.

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

[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 2 3 4 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

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

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].

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 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, 5-16kn)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 ESPANOL DANSK

NEDERLND ITALIANO

NORSK VIET

INDONESIA

ACTIVATIONCODE : EXECUTE

TEST : SINGLE CONTI PANEL COLOR

: PATTERN SIO ECHO-1 ECHO-2

ECHO-3 ECHO-4

SET TO DEFAULT : EXECUTE

LOG/GYRO

CURRENT NAV DATA

1. OPERATIONAL OVERVIEW

GYRO+NAV

PRESS [MENU] KEY TO EXIT

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.

1-5

1. OPERATIONAL OVERVIEW

Text window

Sonar display

Range and bearing marks

Text window

Audio display

Sonar display

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)

COMBI-1 (Sonar + Audio)

This mode is useful for detecting and tracking schools of fish. 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 [COMBI1] 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.

COMBI-2 (Sonar + echosounder)

1-6

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 school of fish concentration.

Text window

Echosounder display

Sonar display

Normal mode display (sonar display)

SHIP SPEED

12.4 kn

SHIP COURSE

246°

LAT/LON

32°52.150N

132°12.150E

DEPTH

126m

WATER CURRENT TO

1.2kn 342°

C2 0.8kn 298°

C3 0.4kn 256°

WATER TEMP

12.4°C

20min 10 0

500

R 1000 T 15

(15) G 10.0

733 708 189

B 60S

Text Window

For description see Chapter 5.

500

R 1000 T 15

(15) G 10.0

517 500 134

B 60S

R 517 B 60S

Range & Bearing Marks

WATER TEMP

12.4°C

20min 10 0

Range Scale

SHIP SPEED

12.4 kn

DEPTH

126m

SHIP COURSE

246°

LAT/LON

32°52.150N

132°12.150E

500 -

1000-

Text Window For description see Chapter 5.

Range and bearing marks data

1. OPERATIONAL OVERVIEW

Sonar display

COMBI-1 display (sonar display + audio display)

1-7

1. OPERATIONAL OVERVIEW

Text Window For description see Chapter 5.

500

R 1000 T 30

(30) G 10.0

545 472 272

B 60S

Bottom

School of Fish

Depth Scale

WATER TEMP

12.4°C

20min 10 0

SHIP SPEED 12.4 kn DEPTH 126m SHIP COURSE 246°

LAT/LON 32°52.150N

132°12.150E

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.

Surface

Range displayed on screen

Bottom

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 gain appears in large characters for five seconds at the top of the sonar display. The current gain is always displayed at the top right corner of the sonar display.

Gain too low Gain proper Gain too high

1. OPERATIONAL OVERVIEW

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 kn. Max allowable speed during raising lowering transducer is 16 kn." and the audio alarm sounds. Press the R/B key to silence the audio alarm.

2. When the lamp above the  switch goes off, 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°

1.4.1 Automatic tilt on/off

0° Horizontal direction (tilt: 0)

Tilt angle range

The automatic tilt feature automatically tilts the transducer within the tilt range selected on the menu. This feature is useful for finding school of fish 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.

1-10

Range and tilt angle

Range (m) ±2-10° ±4-14° ±6-20° ±10-26°

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

±10° ±8° ±6° ±2°

±14° ±12° ±10° ±14°

±20° ±16° ±14° ±6°

±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: 8°  10°  8°  6°  8°  …

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.

1. OPERATIONAL OVERVIEW

Tilt Angle

Auto tilt concept

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.

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1. OPERATIONAL OVERVIEW

Bottom

Case 1 Case 2 Case 3

School of fish (a) School of fish (a) School of fish (a)

Case 1 Case 2 Case 3

Bottom Bottom

(b)

1.4.3 How to discriminate fish echoes from the bottom

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

Case 1: Tilt angle 30 to 40 degrees

School of fish is obscured by the bottom echo.

Case 2: Tilt angle 10 to 20 degrees

School of fish is located above the bottom echo (midwater).

Case 3: Tilt angle 0 to 5 degrees

School of fish is located close to the bottom echo.

How to discriminate fish echoes from bottom

1.4.4 Points to consider

• As a general rule of thumb, a vertically distributed school of fish is a better sonar

target than a horizontally one, since it reflects the transmitted pulse back toward to the source.

• In case 3, both schools of fish (a) and (b) are presented. Generally speaking, how-

ever, midwater schools of fish tend to be larger than bottom schools of fish 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

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1. OPERATIONAL OVERVIEW

Sea surface

Tilt angle 0°

Tilt angle 5-6°

15°

100

(200)

200

(400)

300

(600)

400

(800)

0°

5°

10°

15°

20(40)

40(80)

60(120)

80(160)

100(200)

200(400)

100 m

300 m

78 m

200 m

13°

23 m

100 m

300 m

68 m

200 m

46 m

52 m

26 m15°

Tilt angle setting Detection range (m)

Depth (m)

Vertical width of sonar beam

CSH-5LMARK-2

CSH-8LMARK-2

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 schools of fish 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-5LMARK-2, 13° for CSH-8LMARK-2

Tilt angle and surface fish (example: CSH-5LMARK-2)

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.

Depth, detection range and tilt angle

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1. OPERATIONAL OVERVIEW

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*

TRACKBALL DATA

* = Relative bearing format may be selected with

[OTHER MARKS] on the [MARKS] menu.

Trackball mark

Own ship mark

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.

Location of trackball data

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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.

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

DELETE COLOR : 0

ECHO AVERAGE : 1

INT REJECT : 1

HOR BEAMWIDTH : WIDE NARROW

VER BEAMWIDTH : WIDE NARROW

COLOR : 1 2 3 4

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

: 1 2 3 4

1. OPERATIONAL OVERVIEW

PRESS [MENU] KEY TO EXIT

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

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

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

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+ 63 hidden pages

Furuno CHS-5LMARK-2-55, CHS-5LMARK-2-68, CHS-8LMARK-2-107, CHS-8LMARK-2-85 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

IMPORTANT NOTICES

SAFETY INSTRUCTIONS

TABLE OF CONTENTS

FOREWORD

SYSTEM CONFIGURATION

1. OPERATIONAL OVERVIEW

1.1 Control Unit

1.2 Remote Controller (option)

1.3 Basic Operating Procedure

1.3.1 Turning on the power

1.3.2 Lowering the transducer

1.3.3 Transmitting

1.3.4 Adjusting backlighting of control unit

1.3.5 Choosing a display mode

1.3.6 Choosing the display range

1.3.7 Adjusting the gain

1.3.8 Retracting the transducer, turning off the power

1.4 Setting the Tilt Angle

1.4.1 Automatic tilt on/off

1.4.2 Bottom and tilt angle

1.4.3 How to discriminate fish echoes from the bottom

1.4.4 Points to consider

1.4.5 Tilt angle for surface fish

1.4.6 Suitable tilt angle

1.5 Finding Range and Bearing to a Target

1.6 Sonar Menu Overview

1.6.1 Operating procedure