Furuno CH-250 User manual

COLOR LCD SEARCHLIGHT SONAR
CH-250

C
9-52, Ashihara-cho,
Nishinomiya, Japan
Telephone: [phone]
Telefax: 0798-65-4200
Your Local Agent/Dealer
All rights reserved.
PUB. No. OME-13160
CH-250
(DAMI)
FIRST EDITION :MAR.2000
K2:OCT.3, 2002
Printed in Japan

i
SAFETY INSTRUCTIONS
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel
should work inside the
equipment.
Immediately turn off the power at the
switchboard if water leaks into the
equipment or something is dropped in
the equipment.
Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury can
result.
Immediately turn off the power at the
switchboard if the equipment is emitting
smoke or fire.
Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.
Make sure no rain or water splash leaks
into the equipment.
Fire or electrical shock can result if water
leaks in the equipment.
WARNING
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
protect 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 equipment damage.
Retract the transducer before turning
off the power.
Damage to the equipment may result.
Wait until the transducer switch [↑] lights
steadily and then turn off the power.

ii
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 equipment damage.
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.
TFT LCD
The high quality TFT (Thin Film Transistor)
LCD displays 99.999% of its picture ele-
ments. 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.
WARNING
To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.
Name: Warning Label (1)
Type: 86-003-1011-0
Code No.: 100-236-230
DISPLAY UNIT,
TRANSCEIVER
UNIT
WARNING
Moving shaft can pinch and cut.
Keep hands clear while operating.
Lockout power before servicing.
Name: "Finger Catch"
Warning Label
Type: 06-021-4015-0
Code No.: 100-281-590
HULL UNIT
CAUTION
WORKING WITH THE SONAR OIL
Precautions
n 
Keep oil away from eyes. Wear pro-
tective gloves when working with the oil.
The oil can cause inflammation of the
eyes.
n 
Do not touch the oil. Wear protective
gloves when working with the oil. The
oil can cause inflammation of the skin.
n 
Do not ingest the oil. Diarrhea and
vomiting may result.
n 
Keep the oil out of reach of children.
Emergency procedures
n 
If the oil enters eyes, flush with clean
water about 15 minutes. Consult a
physician.
n 
If the oil is ingested, see a physician
immediately.
Disposal of oil and its container
Dispose of oil and its container in accord-
ance with local regulations. For further
details, contact place of purchase.
Storage
Seal container to keep out foreign material.
Store in dark, cool place.

iii
TABLE OF CONTENTS
FOREWORD..............................................................................................v
SYSTEM CONFIGURATION....................................................................vii
1. OPERATIONAL OVERVIEW
1.1 Control Description...................................................................................................1-1
1.2 Remote Controller.....................................................................................................1-2
1.3 Turning the Power On/Off .........................................................................................1-3
1.4 Raising, Lowering the Transducer.............................................................................1-4
1.5 Adjusting Screen Brilliance, Panel Dimmer...............................................................1-5
1.6 Selecting a Display...................................................................................................1-6
1.7 Adjusting the Gain ....................................................................................................1-7
1.8 Basic Menu Operation ..............................................................................................1-7
2. HORIZONTAL MODE
2.1 Operational Overview ...............................................................................................2-1
2.2 Typical Horizontal Mode Display...............................................................................2-2
2.3 Selecting the Range .................................................................................................2-3
2.4 Selecting Sector Width..............................................................................................2-4
2.5 Selecting Train Center..............................................................................................2-5
2.6 Selecting the Tilt Angle.............................................................................................2-5
2.7 Selecting the Training Speed....................................................................................2-9
2.8 Finding Echo Position with the Cursor ......................................................................2-9
2.9 Event Marker..........................................................................................................2-10
2.10 Range and Bearing Markers..................................................................................2-11
2.11Adjusting the Picture...............................................................................................2-12
2.12 Target Lock............................................................................................................2-17
2.13 Horizontal Menu Overview.....................................................................................2-21
2.14 Interpreting the Horizontal Display.........................................................................2-23
3. VERTICAL FAN MODE
3.1 Operational Overview ...............................................................................................3-1
3.2 Typical Vertical Fan Mode Display............................................................................3-2
3.3 Selecting the Range .................................................................................................3-3
3.4 Selecting Train Center..............................................................................................3-4
3.5 Selecting Display Sector...........................................................................................3-5
3.6 Selecting Sector Center............................................................................................3-6
3.7 Selecting the Training Speed....................................................................................3-7
3.8 Finding Echo Position with the Cursor ......................................................................3-7
3.9 Event Marker............................................................................................................3-8
3.10 Depth and Horizontal Range Markers......................................................................3-9

iv
3.11Adjusting the Picture...............................................................................................3-10
3.12 Vertical Menu Overview.........................................................................................3-12
3.13 Interpreting the Vertical Fan Display ......................................................................3-13
4. ECHO SOUNDER MODE
4.1 Operational Overview ...............................................................................................4-1
4.2 Typical Echo Sounder Display ..................................................................................4-2
4.3 Selecting the Range .................................................................................................4-3
4.4 Train Direction ..........................................................................................................4-4
4.5 Selecting Tilt Angle...................................................................................................4-4
4.6 Selecting Picture Advance Speed.............................................................................4-4
4.7 Measuring Range by Cursor.....................................................................................4-5
4.8 Event Marker............................................................................................................4-5
4.9 Range Marker...........................................................................................................4-7
4.10 Adjusting the Picture................................................................................................4-7
4.11Echo Sounder Menu Overview................................................................................4-10
5. MENU OPERATION
5.1 COMN Menu.............................................................................................................5-1
5.2 Short-cut Menu, Preset Menu...................................................................................5-3
5.3 SYS Menu ................................................................................................................5-7
6. MAINTENANCE, TROUBLESHOOTING
6.1 Preventive Maintenance ...........................................................................................6-1
6.2 Cleaning the Equipment............................................................................................6-1
6.3 Hull Unit Maintenance...............................................................................................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..........................................................................................M-1
SPECIFICATIONS ...............................................................................SP-1
INDEX

v
FOREWORD
Thank you for purchasing the CH-250 Color LCD Searchlight Sonar. We are confident you will
discover why FURUNO has become synonymous with quality and reliability.
Dedicated in the design and manufacture of marine electronics equipment for half a century,
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 safety information and operating and maintenance
instructions set forth in this manual before 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-250 displays underwater objects on a bright 10.4” color LCD display, in 8 or 16 colors
according to received echo strengths. Operating frequency is selectable among 60, 88 and 150
kHz. Eight operating modes provide information for virtually any fishing application.
The main features of the CH-250 are
•High definition active matrix color LCD.
•Target lock on a fish school or stationary position (reef, etc.).
•Audible detection of echoes frees the operator from continuous watch of the display.
•Compact display and hull units permit installation where space is limited.
•Interface IF-8000 permits use of a commercial monitor instead of standard display unit.
•Automatic pulselength switching for optimum performance in short and long ranges.
•Eight operational modes: Horizontal, Expanded Horizontal, Vertical Fan, Echo Sounder,
Horizontal/Vertical Fan, History, Video Plotter and Strata.
•Automatic retraction of transducer at operator-selected ship’s speed between 5 and 15 knots.
•CUSTOM MODE keys provide one-touch setup of the equipment or short-cut key function.
•Tracing of ship’s track with connection of position-fixing equipment (GPS, etc.).
•One of the echo strengths may be displayed in white to enhance the specific echo level.

vi
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 COMN menu. Damage to the train-tilt section may result if it is operated
with maximum transmitter power.
•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.

vii
SYSTEM CONFIGURATION
HULL UNIT
SPEAKER DATA/VIDEO OUT
MOTIONSENSOR
12-32 VDC
Note 1
12-32 VDC
Speaker
Motion Sensor
MS-100
VGA Ext.
Monitor
Control Unit
Display
Unit
CONTROL UNIT CH-252
Remote
Controller
CH-256
HULL UNIT
CH-254
CH-255
12/24-32 VDC
Navigator
Note 2 MONITOR UNIT MU-100C
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.The monitor unit and
control unit can be installed separately
(optional mounting kit required).
Note 2: For blackbox type, MU-100C is
not supplied. Connect external
monitor and control unit to the
interface unit.
TRANSCEIVER UNIT
CH-253
INTERFACE UNIT IF-8000

This page is intentionally left blank.