Furuno CH-300 User Manual

DUAL-FREQUENCY SEARCHLIGHT SONAR

CH-300

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

00015190000

**00015190000

00015190000

**00015190000

OME

13250

**OME

13250

**OME

13250

**OME

13250

Nishinomiya 662-8580, JAPANNishinomiya 662-8580, JAPAN

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

ll rights reserved.

Printed in JapanPrinted in Japan

Pub. No.Pub. No. OME-13250OME-13250

Your Local Agent/Dealer Your Local Agent/Dealer

IRST EDITION :

IRST EDITION : APRAPR.. 20052005

A1A1 :: APRAPR.. 19, 200519, 2005

Thepaperusedinthismanual iselementalchlorinefree.

(( DAMIDAMI ))

CH-300CH-300

* 0 0 0 1 5 1 9 0 0 0 0 ** 0 0 0 1 5 1 9 0 0 0 0 *

* O M E 1 3 2 5 0 A 1 0 ** O M E 1 3 2 5 0 A 1 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

Keep heater away from equipment.

A heater can melt the equipment's power cord, which can cause fire or electrical shock.

Use the proper fuse.

The fuse in the hull and transceiver units protects them from overvoltage, equipment fault and reverse polarity of the ship's mains. If a fuse blows replace it with fuse of the same amperage. Use of a wrong fuse can result in damage to the equipment.

Retract the transducer before turning off the power.

Damage to the equipment may result. Wait until the transducer retraction switch [

↑

] lights steadily and then turn off the power.

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 20 knots when operating the equipment and do not exceed 15 knots when lowering or raising the transducer.

The transducer may become damaged.

Do not use the equipment for other than its intended purpose.

Use of the equipment as a stepping stool, for example, may result in personal injury or damage to the equipment.

WORKING WITH THE SONAR OIL

Precautions

Keep oil away from eyes. Wear protective gloves when working with the oil.

The oil can cause inflammation of the

eyes.

Do not touch the oil. Wear protective gloves when working with the oil. The oil can cause inflammation of the skin.

Do not ingest the oil. Diarrhea and vomiting may result.

Keep the oil out of reach of children.

Emergency procedures

If the oil enters eyes, flush with clean water about 15 minutes. Consult a physician.

If the oil is ingested, see a physician

immediately.

Set the gain properly.

No picture appears if the gain setting is too low, and noise appears when the gain is too high. If the gain is set improperly, the depth indication may be wrong, resulting in a potentially dangerous situation if the vessel is navigated by monitoring the depth indication.

Gain too high Proper gain Gain too low

Warning labels

Warning labels are attached to the display, transceiver and hull units. Do not remove the labels. If a label is missing or illegible, contact a FURUNO agent or dealer.

WARNING

To avoid electrical shock, do not remove cover. No user-serviceable parts inside.

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

DISPLAY UNIT

Name: Warning Label (2) Type: 86-003-1001-1 Code No.: 100-236-741

Disposal of oil and its container

Dispose of oil and its container in accordance with local regulations. For further details, contact place of purchase.

Storage

Seal container to keep out foreign material. Store in dark, cool place.

WARNING

Moving shaft can pinch and cut. Keep hands clear while operating. Lockout power before servicing.

HULL UNIT

Name: Injury Warning Label Type: 06-021-4015-0 Code No.: 100-281-590

TFT LCD

The high quality TFT (Thin Film Transistor) LCD displays 99.999% of its picture elements. The remaining 0.01% may drop out or light, however this is an inherent property of the LCD; it is not a sign of malfunction.

FOREWORD ........................................................................................................ vi

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

1. OPERATIONAL OVERVIEW.........................................................................1-1

1.1 Control Description .................................................................................................... 1-1

1.2 Remote Controller...................................................................................................... 1-2

1.3 Turning the Power On/Off .......................................................................................... 1-3

1.3.1 Power on.........................................................................................................1-3

1.3.2 Power off.........................................................................................................1-3

1.4 Raising, Lowering the Transducer.............................................................................. 1-4

1.4.1 Lowering the transducer.................................................................................. 1-4

1.4.2 Raising the transducer .................................................................................... 1-4

1.5 Adjusting Screen Brilliance, Panel Dimmer................................................................ 1-5

1.6 Choosing a Display.................................................................................................... 1-6

1.7 Choosing a Frequency............................................................................................... 1-9

1.8 Mix Display .............................................................................................................. 1-11

1.9 Adjusting the Gain ...................................................................................................1-13

1.10 Menu Overview........................................................................................................ 1-15

2. HORIZONTAL MODE....................................................................................2-1

2.1 Operational Overview ................................................................................................ 2-1

2.2 Typical Horizontal Mode Display................................................................................ 2-2

2.3 Choosing a Range..................................................................................................... 2-3

2.4 Choosing Sector Width .............................................................................................. 2-4

2.5 Choosing Train Center............................................................................................... 2-5

2.6 Choosing a Tilt Angle ................................................................................................. 2-5

2.6.1 Tilt angle for surface fish ................................................................................. 2-6

2.6.2 Distinguishing fish echo from bottom echo in coastal waters ........................... 2-6

2.6.3 Suitable tilt angle ............................................................................................. 2-8

2.7 Choosing Training Speed........................................................................................... 2-9

2.8 Changing Training Direction....................................................................................... 2-9

2.9 Finding Echo Position with the Cursor ..................................................................... 2-10

2.10 Event Marker ........................................................................................................... 2-11

2.11 Depth and Horizontal Range Markers ...................................................................... 2-12

2.12 Adjusting the Picture................................................................................................ 2-13

2.12.1 Suppressing bottom and surface reflections.................................................. 2-13

2.12.2 Suppressing bottom tail................................................................................. 2-14

2.12.3 Displaying weak echoes clearly..................................................................... 2-14

2.12.4 Erasing weak echoes .................................................................................... 2-16

2.12.5 Suppressing interference from marine life .....................................................2-17

2.12.6 Enlarging fish echoes (horizontal expansion display).....................................2-18

2.13 Target Lock.............................................................................................................. 2-19

2.13.1 Choosing a target lock mode......................................................................... 2-19

2.13.2 Position mode ............................................................................................... 2-19

2.13.3 Echo mode.................................................................................................... 2-20

iii

2.14 Horizontal Menu Overview.........................................................................................2-22

2.14.1 Horizontal menu description............................................................................2-22

2.15 Interpreting the Horizontal Display.............................................................................2-24

2.15.1 How the horizontal mode picture is painted.....................................................2-24

2.15.2 Sample displays ..............................................................................................2-25

2.15.3 Combination display examples ........................................................................2-29

3. VERTICAL SCAN MODE..............................................................................3-1

3.1 Operational Overview...................................................................................................3-1

3.2 Typical Vertical Scan Mode Display.............................................................................3-2

3.3 Choosing a Range .......................................................................................................3-3

3.4 Choosing Train Center.................................................................................................3-4

3.5 Choosing Display Sector..............................................................................................3-5

3.6 Choosing Sector Center...............................................................................................3-6

3.7 Choosing Training Speed.............................................................................................3-7

3.8 Finding Echo Position with the Cursor.........................................................................3-7

3.9 Changing Training Direction.........................................................................................3-7

3.10 Event Marker................................................................................................................3-8

3.10.1 Deleting all event markers from the vertical scan display..................................3-9

3.11 Depth and Horizontal Range Markers..........................................................................3-9

3.12 Adjusting the Picture..................................................................................................3-10

3.12.1 Displaying weak echoes clearly.......................................................................3-10

3.12.2 Suppressing noise and interference................................................................3-11

3.13 Vertical Menu Overview .............................................................................................3-12

3.13.1 Vertical menu description................................................................................3-12

3.14 Interpreting the Vertical Scan Display........................................................................3-13

3.14.1 How the vertical scan mode picture is painted................................................3-13

3.14.2 Sample displays ..............................................................................................3-14

3.14.3 Horizontal/vertical scan port-starboard, Horizontal/vertical scan

upward-downward display...............................................................................3-16

4. ECHO SOUNDER MODE..............................................................................4-1

4.1 Operational Overview...................................................................................................4-1

4.2 Typical Echo Sounder Display .....................................................................................4-2

4.3 Choosing a Range .......................................................................................................4-3

4.4 Train Direction..............................................................................................................4-4

4.5 Choosing a Tilt Angle...................................................................................................4-4

4.6 Choosing a Picture Advance Speed.............................................................................4-4

4.7 Measuring Range by Cursor........................................................................................4-5

4.8 Event Marker ................................................................................................................4-5

4.8.1 Inscribing the event marker...............................................................................4-6

4.8.2 Deleting all event markers from echo sounder display......................................4-6

4.9 Range Marker ..............................................................................................................4-7

4.10 Adjusting the Picture....................................................................................................4-7

4.10.1 Displaying weak echoes clearly.........................................................................4-7

4.10.2 Finding echo strength (A-scope display)...........................................................4-9

4.10.3 Suppressing interference and noise..................................................................4-9

4.11 Echo Sounder Menu Overview..................................................................................4-10

4.11.1 Echo sounder menu description......................................................................4-10

5. MENU OPERATION ......................................................................................5-1

5.1 COM1 Menu ..............................................................................................................5-1

5.1.1 COM1 menu description.................................................................................. 5-2

5.2 COM2 Menu ..............................................................................................................5-3

5.2.1 Displaying the COM2 menu............................................................................. 5-3

5.2.2 COM2 menu description.................................................................................. 5-3

5.3 Short-cut Menu, Preset Menu ....................................................................................5-4

5.3.1 Choosing short-cut or preset ........................................................................... 5-4

5.3.2 Preset key ....................................................................................................... 5-5

5.3.3 Short-cut key................................................................................................... 5-7

5.4 SYSTEM Menu.......................................................................................................... 5-9

5.4.1 How to open the SYSTEM menu..................................................................... 5-9

5.4.2 System setting menus ................................................................................... 5-10

5.4.3 Sonar (horizontal) mode range settings......................................................... 5-14

5.4.4 Vertical scan mode range settings................................................................. 5-15

5.4.5 Echo sounder mode range settings............................................................... 5-16

5.4.6 Track range settings...................................................................................... 5-17

5.4.7 Color palette.................................................................................................. 5-18

5.4.8 Language...................................................................................................... 5-19

5.4.9 System backup.............................................................................................. 5-19

5.4.10 Loading backup data..................................................................................... 5-19

5.4.11 Transducer frequency adjustment ................................................................. 5-20

5.4.12 Demonstration mode ..................................................................................... 5-20

5.4.13 Restoring all default settings ......................................................................... 5-21

6. MAINTENANCE, TROUBLESHOOTING......................................................6-1

6.1 Preventive Maintenance ............................................................................................ 6-1

6.2 Cleaning the Equipment.............................................................................................6-1

6.3 Hull Unit Maintenance................................................................................................ 6-2

6.3.1 Lubrication ...................................................................................................... 6-2

6.3.2 Manually raising, lowering transducer ............................................................. 6-2

6.4 Transducer Maintenance ...........................................................................................6-3

6.5 Fuse Replacement..................................................................................................... 6-3

6.6 Troubleshooting......................................................................................................... 6-4

6.7 Error Messages ......................................................................................................... 6-5

6.8 Diagnostics................................................................................................................ 6-6

6.9 Test Pattern ...............................................................................................................6-8

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

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

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

FOREWORD

Thank you for purchasing the CH-300 Dual-Frequency Searchlight Sonar. We are confident you will discover why FURUNO has become synonymous with quality and reliability.

Dedicated in the design and manuf acture of marine electronics equipment for half a cent ury, FURUNO Electric Company has gained an unrivaled reputation as a world leader in the industry. This is the result of our technical excellence as well as our worldwide distribution and service network.

Please carefully read and follow the saf et y information and operating and m aintenance instructions set forth in this manual bef ore attempting to operate the equipment and conduct any maintenance. Your sonar will perform to the utmost of its ability only if it is operated and maintained in accordance with the correct procedures.

Features

The CH-300 is a dual-frequency searchlight sonar. Consisting of a monitor unit, cont rol unit, transceiver unit and hull unit, it displays underwater objects on the monitor of choice, in 8 or 16 colors according to received echo strengths.

The main features are

• Horizontal and vertical section modes for detecting, searching, tracking and monitoring

fish school.

• 12 display modes for virtually any fishing applic ation.

• Mix mode discriminates small fish.

• Fish or bottom echo can be displayed in white to distinguish bottom fish.

• Hull unit automatically raises the tr ansducer when ship’s speed exceeds prescribed

speed.

• User-programmed function keys provide one-touch access to desired function.

• Two types of target lock for effective tracking of fish school.

• Digital display of position, speed, course, water temperature, depth, tide speed and

direction. (Requires appropriate sensors.)

Usage Precautions

• The Motion Sensor MS-100 compensates for ship’s pitching and rolling. However, it does

not compensate for load unbalance.

• If the equipment will not be used for a long time, shut off the power to it at the mains

switchboard, to prevent battery discharge.

• If the soundome is to be operated while the ship is dry-docked, set the transmitter output

power to “minimum” (on the COM1 menu). Damage to the train-tilt section may result if it is operated with maximum transmitter power while the ship is dry-docked.

• When the ship is dry-docked check for signs of corrosion on the soundome. Find the

reason for the corrosion and attach a zinc plate to the hull unit as an anticorrosion measure if necessary.

Notice

• No part of this manual may be copied or reproduced without written permission.

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

• The contents of this manual and equipment specifications are subject to change without

notice.

• The example screens (or illustrations) 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.

• This manual is intended for use by native speakers of English.

• FURUNO will assume no responsibility for the damage caused by improper use or

modification of the equipment or claims of loss of profit by a third party.

vii

SYSTEM CONFIGURATION

INTERFACE UNIT IF-8000

CONTROL UNIT/MONITOR UNIT CH-302/MU-100C

Navigator

Control Unit

MONITOR UNIT MU-100C

Display Unit

VGA Ext. Monitor

Remote

Controller

CH-256

TRANSCEIVER UNIT CH-303

CONTROL UNIT CH-302

SPEAKER

Speaker

Motion Sensor

Note 1: MU-100C is the standard supply

monitor unit. An external monitor may be connected via the interface unit (option). The drawing above shows the system configuration with the MU-100C.

Note 2: For blackbox type, MU-100C is

not supplied. Connect external monitor (user supply) and control

unit to the interface unit.

When Monitor MU-151C is connected, this interface is not necessary.

Satellite

Compass

12-24 VDC

HULL UNIT CH-304 CH-305

12-24 VDC

viii

System configuration

1. OPERATIONAL OVERVIEW

1.1 Control Description

Selects center bearing of training sector.

Selects detection range.

Selects training speed (horizontal mode)/ train center (vertical scan)/picture

Turns the power on/off.

Raises the transducer.

Adjusts receiver sensitivity.

Selects width of training sector.

advancement speed (echo sounder).

Reverses scanning direction.

Controls tilt angle. Selects center direction of

the vertical scanning sector.

Adjusts display brilliance.

Omnipad

Shifts cursor. Selects menu items, options.

XDR

GAIN(PUSH)

POWER

SECTOR TRAIN

MIX

DISPLAY MODE

Lowers the transducer.

Turns mix display on/off.

Low freq/High freq selection

Switches control between main and

Horizontal Combination*

Horizontal

Horizontal Expansion

MIX

DISPLAY MODE

sub windows.

MAIN

SUB

Echo Sounder

Vertical Scan

* Horizontal/History, Horizontal/Vertical scan, Horizontal/Vertical zoom, Horizontal/Video plotter

RANGE

MAIN

SUB

FULL HALF

FAST

SCAN

CUSTOM MODE

Provide short-cut key or one-touch setup.

Turns target lock on/off.

Switches training sector to 360° (horizontal mode), or 180° (vertical scan mode).

Horizontal Mode

REVERSE

TILT

TARGET BRILL

Tilt

Sounding beam

R/B

EVENT

Opens/closes menu.

Inscribes/erases event markers.

Inscribes/erases range and bearing markers.

Vertical Scan Mode

BOW

Echo Sounder Mode

Control unit

1-1

1. OPERATIONAL OVERVIEW

1.2 Remote Controller

The Remote Controller CH-256 (option) provides armchair control over range, tilt, target lock and sounding range.

Choose tilt angle.

Choose display range.

Chooses sounding area: Full circle 360° (horizontal mode) Half circle 180° (vertical scan mode).

Enables/disables target lock.

Remote controller

1-2

1. OPERATIONAL OVERVIEW

1.3 Turning the Power On/Off

1.3.1 Power on

This sonar has a demonstration mode which provides simulated operation without the transducer. For further details see page 5-20.

Press the POWER switch on the control unit till you hear a “click.” A beep sounds, the lamp

above the switch lights and the startup display appears. Four seconds later the last-used display appears.

MODEL: CH-300 **/***kHz

**: Frequency

Startup displa

Note 1: Wait at least five seconds before reapplying the power.

Note 2: If the language selection window appears, see paragraph 5.4.8.

1.3.2 Power off

1. Check that the speed is under 15 knots*, and then press the [↑] switch on the control

panel to retract the transducer. The lamp above the switch blinks while the transducer is being raised and lights steadily when it is fully raised. *The transducer may be damaged if it is raised when the speed is more than 15 kts.

Transducer status indicator

• Up arrow: Filled when transducer is fully retracted into the tank.

• Down arrow: Filled when transducer is fully lowered.

• Appropriate arrow flashes during raising/lowering of transducer. Note: When the transducer is being raised automatically (auto raise feature),

the arrows are filled and the up arrow flashes. When the transducer is fully retracted, the up arrow lights and the down arrow becomes hollow.

Transducer status indicator

2. Confirm that the lamp above the [↑

] switch lights steadily (meaning the transducer is

fully retracted) and then press the POWER switch.

Note 1: The transducer is automatically retracted into the tank even if the equipment is

turned off before retracting the transducer. However, for safety purposes, make it a habit to retract the transducer before turning off the power.

Note 2: After changing settings, wait at least one minute before turning off the power to

allow the equipment to memorize settings (and start up with them at the next power up). No harm will result to the equipment if this is not done.

1-3

1. OPERATIONAL OVERVIEW

1.4 Raising, Lowering the Transducer

1.4.1 Lowering the transducer

CAUTION

Do not exceed 20 knots when operating the equipment and do not exceed 15 knots when lowering or raising the transducer.

The transducer may become damaged.

With the boat at the fishing ground, press t he [↓] switch to lower the transducer. The lamp above the switch blinks while the transducer is being l owered and lights when it is completely lowered. The down arrow of the transducer status indicator is filled when the transducer is completely lowered.

1.4.2 Raising the transducer

Press the [↑] switch to raise the transducer. The lamp above the switch blinks while the transducer is being raised and lights steadily when it is fully raised. The up arrow of the transducer status indicator is filled when the transducer is fully retracted.

Note 1: The automatic transducer retraction feature, which requires speed input, raises the transducer when the ship’s speed exceeds the operator-set speed (between 5 and 15 knots). If speed data is erroneous the transducer may be rais ed at a speed different from the speed specified. For further details about the automatic transducer retraction, see AUTO RETRACTION on page 5-13.

Note 2: An audio alarm may sound when the ship’s speed exceeds the speed specified. For further details, see SPEED ALARM/MESSAGE on page 5-13.

1-4

1. OPERATIONAL OVERVIEW

1.5 Adjusting Screen Brilliance, Panel Dimmer

Screen brilliance can be adjusted in 10 steps and panel dimmer (backlighting) in five.

1. Press the BRILL key to open the dialog box for screen brilliance and panel dimmer

adjustment. Do the next step within four seconds, otherwise the dialog box will be erased.

BRILL:3

DIMMER:3

Brilliance, panel dimmer dialog box

2. Press ◄ or ► as appropriate to adjust screen brilliance (0 is the lowest brilliance; 9 the

highest). Note that continuous pressing of the BRILL key also changes the brilliance

level.

3. Press ◄ or ► as appropriate to adjust the panel dimmer (0 is the lowest level; 4 is the highest).

4. Press the MENU key to register settings and close the dialog box. Note that the dialog

box is automatically erased if there is no control operation within about four seconds.

Note 1: The brilliance of a commercial monitor cannot be adjusted with the BRILL key. Use

the associated control on the monitor.

Note 2: For the supplied monitor unit, if you turn off the power with the brilliance set at minimum the screen will show nothing at next power-up. In this case press the BRILL key

several times to raise the brilliance.

1-5

1. OPERATIONAL OVERVIEW

1.6 Choosing a Display

12 displays are provided; choose the one which best suits your current needs. For a description of each display, see Chapter 2.

Single-frequency displays

Key

Display

NAV

DATA

HORIZONTAL

This mode provides 360 degree coverage. Useful for general search. (Chapter 2)

NAV

DATA

VERTICAL SCAN

Key

Display

NAV

DATA

EXPANDED HORIZONTAL

Expanded horizontal picture appears over the entire screen. (Chapter 2)

NAV

DATA

A-SCOPE

DISPLAY

Water temp/depth

ECHO SOUNDER

Vertical section of underwater conditions appears on the entire screen. (Chapter 3)

Single-frequency displays

Using a fixed spot beam this display shows fish echoes below or around the vessel. (Chapter 4)

1-6

Dual-frequency displays

1. OPERATIONAL OVERVIEW

Key

DUAL-FREQ HORIZONTAL

360° dual-freq. display of fish echoes, etc. (Chapter 2)

x2 x2

DUAL-FREQ. VERTICAL SCAN

Dual-freq. display of vertical section of fish echoes. Useful for judging depth and center position of fish school. (Chapter 3)

Display Display

NAV

DATA

Key

DUAL-FREQ. HORIZ. EXPANSION

Expansion of dual-freq. horizontal display. (Chapter 2)

NAV

DATA

A-SCOPE

Depth/Temp. Display

DUAL-FREQ. ECHO SOUNDER

Dual-freq. display of fish echoes below vessel. (Chapter 4)

Dual-frequency displays

1-7

1. OPERATIONAL OVERVIEW

Combination displays

Key

Choose

Display

NAV DATA

HORIZONTAL/HISTORY

The horizontal picture appears in the main window; the history picture in the sub window. Useful for showing history of fish movement, distribution. (Chapter 2)

NAV DATA

HORIZONTAL/VERTICAL SCAN

Key

Choose

Display

NAV DATA

HORIZONTAL/VIDEO PLOTTER The horizontal picture appears in the main

window and the video plotter picture, which traces ship's track, in the sub window. (Chapter 2)

NAV DATA

HORIZONTAL/VERTICAL ZOOM

The horizontal picture appears in the main window; the vertical fan picture in the sub window. (Chapter 3)

The horizontal picture appears in the main window; vertical zoom picture in the sub window. (Chapter 3)

Combination displays

1-8

1. OPERATIONAL OVERVIEW

1.7 Choosing a Frequency

Yo u may choose low frequency or high frequency, with the LF/HF key. The display shows HI or LO at the top of the screen depending on yo ur selection. Use the table below to determine which frequency to use.

Item Low frequency High frequency

Long-range detection PREFERABLE

Attenuation loss is small on low frequency.

Use in shallow waters NOT RECOMMENDED

Bottom echo is prominent because of wide beam width so fish echoes are hidden.

Detection range (detection “leaks”)

Detection of bottom fish

Detection of bait fish NOT RECOMMENDED

Affected by air bubbles from other vessels

PREFERABLE Detection area is wide (beam width is wide).

NOT RECOMMENDED Fish echo and bottom echo overlap. (Wide beam width)

Not suited for this purpose. (Bait fish are not easily detected with low frequency.)

NOT RECOMMENDED Low frequency is easily interfered by cavitation from other vessels.

NOT RECOMMENDED Attenuation loss is great on high frequency.

PREFERABLE Bottom echo is less prominent because of narrow beam width so fish echoes are easy to find.

NOT RECOMMENDED Detection area is narrow (beam width is narrow).

PREFERABLE Fish echo and bottom echo are displayed separately. (Narrow beam width)

PREFERABLE Well suited for this purpose. (Bait fish are more easily detected with high frequency. )

PREFERABLE High frequency is not easily interfered by cavitation from other vessels.

The dual-frequency display is usef ul for comparing the picture from one frequency against the other to overcome deficiencies in both. Use the single-frequency for objective-specif ic fishing.

High frequency

Low frequency

1-9

1. OPERATIONAL OVERVIEW

Frequency selection and mode

Single-frequency display or combination di splay (other than vertical scan combination): The LF/HF key chooses low frequency or high frequency alternately.

Dual-frequency display (mix mode OFF): The LF/HF key switches the frequency of the

high-and low-frequency displays alternately.

Dual-frequency display (mix mode ON): The LF/HF key changes the frequency of the

left-hand display* (top display in dual-frequency vertical scan display) from low to high alternately.

* Dual-frequency horizontal display, Dual-frequency horizontal expansion display,

Dual-frequency echo sounder display.

LOW-FREQ.

DISPLAY

MIX

DISPLAY

LF/HF key

HIGH-FREQ.

DISPLAY

Frequency switching in dual-frequency combinat ion display, mix display ON

Combination display (vertical scan combination):

Main window is active:

The LF/HF key changes the frequency of the main window from low

to high alternately. Sub window is active:

The LF/HF key changes the frequency of the sub window from low to

high alternately.

To switch between main and sub windows use the MAIN/SUB key.



MIX

DISPLAY

1-10

1. OPERATIONAL OVERVIEW

1.8 Mix Display

The mix display compares echo intensity between low and high frequencies, and displays echoes from tiny fish in discriminative colors. This is done by utilizing the fact that tiny fish return a stronger echo against a high frequency rather than a low frequency. The equipment accomplishes this as follows:

• If a high frequency echo is stronger than the corresponding echo on the low frequency,

the high frequency echo is displayed.

• If the low frequency echo is stronger than or equal to the high frequency echo, it is less

likely to be a tiny fish and therefore is displayed in blue.

In other words, the echoes displayed in orange thru light-blue may be considered to be tiny fish such as whitebait. When the mix display is active the indication MX appears at the top of the display.

High-frequency display

GAIN (HI)

GAIN (LO)

Mix display

How the mix display works

1-11

1. OPERATIONAL OVERVIEW

To use the mix display effectively, it is important that the gain for both the low and high frequencies is set properly. When searching for young fish such as whitebait, follow the procedure below. For detailed information about gain adjustment, see the next section.

Gain adjustment

1. Adjust the high-frequency gain while observing targeted fish.

2. While observing the mix display, set the low-frequency gain to 0 and gradually raise it just until echoes from adult fish disappear from the mix display.

3. While observing the echoes from young fish on the mix display, readjust the low-frequency gain in order to distinguish young fish. When the echoes from young fish are weak, lower the low-frequency gain. If adult fish appear, raise the low-frequency gain. (Rule of thumb: For whitebait, low-frequency gain is set 3-4 steps lower than high-frequency gain.)



To activate the mix mode, press the MIX key. How to display the mix display depends on the

display mode in use.

Single-frequency display or combination di splay (other than vertical scan combination): Use the MIX key to switch between the mix display and the single-frequency

display alternately.

Dual-frequency display: Use the MIX key to switch between the mix display and the

dual-frequency display alternately.

LOW-FREQ.

DISPLAY

HIGH-FREQ.

DISPLAY

MIX key

HIGH-FREQ.

DISPLAY

How the MIX key works in dual-frequency mode

Combination display (vertical scan combination:

Main window is active:

The MIX key changes the frequency of the main window from low to

high alternately. Sub window is active:

The MIX key changes the frequency of the sub window from low to

high alternately.

To switch between main and sub windows use the MAIN/SUB key.



MIX

DISPLAY

1-12

1. OPERATIONAL OVERVIEW

1.9 Adjusting the Gain

The GAIN control adjusts the sensitivity of the receiver. Normally, the control is adjusted so

that the bottom echo is displayed in reddish-brown mixed with red. Initially set the gain between “4” and “6” and then fine tune according to fishing ground, etc.

Too Low Proper

Too High

How to adjust the gain

Single-frequency or combination display

When using both high and low frequency in the horizontal/vertical scan display, refer to the procedure on the next page.

1. Push the GAIN control.

HIGH FREQ GAIN: 5.0 (0-10)

2. Turn the GAIN control to adjust the gain (range: 0-10).

△

GAIN 5.3

Gain setting

Location of gain setting indication

3. Press the MENU key to close the gain setting window. Note that it is not necessary to press the MENU key – the window will automatically if no operation is detected for four seconds.

Note 1: Step 1 is not necessary if the menu item GAIN SETTING PROTECT (SYSTEM

SETTING 2 menu) is set for OFF.

Note 2: You can switch control between the main and sub windows in the horizontal/vertical scan display with the MAIN/SUB key.

1-13

1. OPERATIONAL OVERVIEW

Dual-frequency display

1. Push the GAIN control.

HIGH FREQ GAIN :

LOW FREQ GAIN : 5.0 (0-10)

PUSH GAIN KNOB TO SPECIFY THE FREQ ROTATE GAIN KNOB TO CHANGE THE FREQ

5.0 (0-10)

2. Push the GAIN control to choose the frequency for which you want to adjust the gain.

3. Rotate the GAIN control to adjust the gain (range: 0-10).



GAIN(HI) 5.0 GAIN(LO) 5.3

Gain setting high and low frequencies

Location of gain setting indications on dual-frequency display

4. Press the MENU key to close the gain setting window.

1-14

1. OPERATIONAL OVERVIEW

1.10 Menu Overview

The menu, consisting of six menus, mostly contains items which once preset do not require frequent adjustment. Below is the procedure for basic menu operation.

1. Press the MENU key to open the menu.

Note: Either PRESET (default setting) or SHORT-CUT appears between ES and SYS at the

top of the screen depending on the setting of CUSTOM KEY on the SYSTEM SETTING 1 menu, and they set the function of the custom keys [1], [2], [3]. For further details see pages 5-3 through 5-7.)

DELETING TRACK NO

MIX MODE

WHITE MARKER OFF SIG LEVEL OFF COLOR 16 BKGD COLOR 2

: SELECT

COM1 HORZ VERT ES PRESET SY SCOM2

STANDARD

: CHANGE MENU: END

COM2 menu

2. The last-used menu is displayed. To choose a different menu, press ▲ to choose

MENU and then press ◄ or ► to choose menu desired.

3. Press ▲ or ▼ to choose menu item desired. At the bottom of the screen menu help is

provided.

4. Press ► to open the corresponding dialog box. The example below shows the dialog box for DELETING TRACK, which is in the COM2 menu.

DELETING TRACK

NO YES

Dialog box for deleting track

5. Press ◄ or ► to choose option desired. If the option requires input of numeric data, use ◄ or ► to lower or raise the figure, respectively.

6. Press ▲ or ▼ to return to the menu, or press the MENU key to register your selection

and close the menu.

1-15

1. OPERATIONAL OVERVIEW

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1-16

2. HORIZONTAL MODE

2.1 Operational Overview

The figure below shows the typical horizontal mode operating sequence.

Set center bearing of train sector.

Set range.

MAIN

SUB

FULL

HALF

RANGE

FAST

SCAN

CUSTOM MODE

REVERSE

TILT

TARGET

Set tilt angle.

BRILL

R/B

EVENT

11.

(ex. TVG) as required.

Turn on the power.

XDR

POWER

6(a).

Set sector bearing

range.

Adjust gain.

GAIN(PUSH)

SECTOR TRAIN

MIX

DISPLAY MODE

Adjust menu settings

Lower the

transducer.

Select appropriate

horizontal mode.

Control panel

Adjust screen

brilliance.

6(b).

Change sector bearing

range to 360°.

10.

Measure range and

bearing to target with cursor.

2-1

2. HORIZONTAL MODE

2.2 Typical Horizontal Mode Display

Press the

(horizontal mode) key. Each press chooses the single frequency or dual-

frequency horizontal mode display alternately.

NAV

DATA

Single-freq. Display

Dual-freq. Display

Switching between single-frequency horizontal and dual-frequency horizontal displays

Tilt angle indicator

* Depth marker

When depth data is input from external equipment, the depth marker shifts according to depth data. If the depth data is greater than the horizontal range, the depth marker shifts to lowest position.

Demonstration mode

Cursor data

Sector marker

Train indicator

Horizontal max. range

Range and bearing markers

Vertical max.

Tilt angle

Range

depth

Interference rejector

Frequency

(Indicates transducer tilt angle.)

Tilt angle

Depth marker* (See note at left.)

Bottom echo

Bearing marker

Fish echo

ETA marker

Own ship marker

Range marker

Event marker

Cursor

Event marker data

→

↓

13 B208° +

→

B234°

(DEMO)

Ship's track*

Current vector*

R 40 m T 40°

Sweep indicator (Shows train position in horizontal mode.)

→ ↓

B7°

Range and bearing markers data

34° 12. 343' N 134° 34. 213' W

CSE 357° SPD 9.9 kt

DEP 35.1 m TMP 12.3°C

CUR 11.0°

CUR 11.0˚

2.0 kt

2.0 kt GAIN 5.3

TVG LEVEL 4.0 DISTANCE 200 m

COLOR

North marker*

Transducer status indicator Filled arrow: Respective action completed Blinking arrow: Action in progress

Target lock indicator

Position in latitude*, longitude*

Course*, speed* Depth,

water temperature* Tide direction*,

tide speed* Gain setting

TVG level, distance settings

Color bar

* Requires appropriate sensor.

2-2

Single-frequency horizontal display

2. HORIZONTAL MODE

2.3 Choosing a Range

The RANGE control chooses the detection (display) range. Choose the range according to either the fish species being searched or the dept h desired. 15 ranges are available and minimum and maximum ranges depend on the transducer used.

SEA SURFACE

Range indicated on the screen.

BOTTOM

Range description

Range indicated on the screen.

Default horizontal mode range sett ings

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 m 20 40 60 80 100 120 160 200 250 300 400 500 600 800 1200 ft 50 100 200 300 400 500 600 700 800 1000 1200 1500 2000 3000 4000

Normally the range is set so that the bottom is traced at the lower part of the screen (like an echo sounder). Each time the RANGE control is operated the newly selected range briefly appears in large characters at the screen top. Range is always displa yed at the right-hand corner of the screen.

Note 1: Unit of range measurement may be chosen from among meters, feet, fathoms, passi/braza or Hiro (Japanese) with UNIT on the SYSTEM SETTING 1 menu. For details see page 5-11.

Note 2: Ranges may be freely preset as desired. For details see page 5-14.

2-3

2. HORIZONTAL MODE

2.4 Choosing Sector Width

You may set the width of the scanned sector.

Display sector

96°

Sector width

The SECTOR control chooses the width of the scanned sector among the sixteen positions

shown in the table below. Clockwise rotation of the control increases the sector width; counterclockwise rotation decreases it.

Sector width (°)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

6 24 48 72 96 120 144 168 192 216 240 264 288 312 336 360

(shown: 96˚)

In the full-circle mode (360°) the direction of training is clockwise; in the half-circle mode the direction is clockwise to counterclockwise alternately.

One-touch selection of 360° sector

Each pressing of the FULL/HALF key alternately chooses 360° sector (full circle) or 168° sector (half circle). If the SECTOR control is operated following the selection of the full-circle display, the next pressing of the FULL/HALF key presents the full-circle display.

Sector set with SECTOR control

FULL/HALF

key

Full circle

FULL/HALF

key

Half circle

168

How the FULL/HALF key works

2-4

+ 94 hidden pages

Furuno CH-300 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INSTRUCTIONS

TABLE OF CONTENTS

SYSTEM CONFIGURATION

1. OPERATIONAL OVERVIEW

1.1 Control Description

1.2 Remote Controller

1.3 Turning the Power On/Off

1.4 Raising, Lowering the Transducer

1.5 Adjusting Screen Brilliance, Panel Dimmer

1.6 Choosing a Display

1.7 Choosing a Frequency

1.8 Mix Display

1.9 Adjusting the Gain

1.10 Menu Overview

2. HORIZONTAL MODE

2.1 Operational Overview

2.2 Typical Horizontal Mode Display

2.3 Choosing a Range

2.4 Choosing Sector Width