Furuno CSH-7 User manual

COLOR SCANNING SONAR
MODEL CSH-7

FIRST EDITION : MAY 1997
Your Local Agent/Dealer
FURUNO ELECTRIC CO ., LT D .
c
9-52, Ashihara-cho,
Nishinomiya, Japan 662
Telephone: [phone]
Telefax: 0798-65-4200
All rights reserved.
Printed in Japan
PUB. No. OME-13020
CSH-7
(DAMI)

iiiiiiiiiiiii i
SAFETY INSTRUCTIONS
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury
can result.
Turn off the power immediately if water
leaks into the equipment or the equip-
ment is emitting smoke or fire.
Continued use of the equipment can cause
fire or electrical shock.
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.
Do not operate the equipment with wet
hands.
Electrical shock can result.
Keep heater away from equipment.
Heat can alter equipment shape and melt
the power cord, which can cause fire or
electrical shock.
Do not open the equipment.
Hazardous voltage which can
cause electrical shock, burn or
serious injury exists inside the
equipment. Only qualified
personnel should work inside
the equipment.
WARNING CAUTION
Use the proper fuse.
Use of a wrong fuse can result in fire or
permanent equipment damage.
Do not use the equipment for other than
its intended purpose.
Personal injury can result if the equipment
is used as a chair or stepping stool, for
example.
Do not place objects on the top of the
equipment.
The equipment can overheat or personal
injury can result if the object falls.
Do not exceed speed noted in the speci-
fications when operating the equipment
or lowering or raising the transducer.
The transducer may become damaged.
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
inside the ship.
POSSIBILITY OF INJURY
1. If breaker (hull unit) trips do the
following:
1) Turn off power swich on hull unit.
2) Wait 60 sec after breaker has tripped.
3) Press breaker.
2. Turn off hull unit before using hand
crank.

ii
TABLE OF CONTENTS
FOREWORD
AWord to CSH-7 Owners ........................................................................................................v
Features..................................................................................................................................... v
System Configuration ..............................................................................................................vi
OPERATIONAL OVERVIEW
Equipment Overview.............................................................................................................1-1
Display Unit Control Panel Description ................................................................................1-2
Turning the Power On/Off.....................................................................................................1-2
Adjusting Screen Brilliance, Control Panel Backlighting .....................................................1-3
Lowering the Transducer .......................................................................................................1-3
Selecting a Display Range.....................................................................................................1-3
Setting the Tilt Angle.............................................................................................................1-3
Adjusting the Gain.................................................................................................................1-7
MARKERS AND DATA
Standard Markers and Data ...................................................................................................2-1
Optional Markers and Data....................................................................................................2-3
MENU OVERVIEW
Scan Menu Operation ............................................................................................................3-1
Menu-1, Menu-2, System Menu Operation...........................................................................3-4
FINE TUNING THE PICTURE
Eliminating Unwanted Feeble Echoes...................................................................................4-1
Displaying Surface Fish Clearly............................................................................................4-2
Suppressing Seabed Tail ........................................................................................................4-2
Suppressing Seabed and Sea Surface Reflections in Shallow Waters ...................................4-3
Rejecting Sonar Interference and Noise ................................................................................4-4
ADVANCED OPERATION
Measuring the Range and Bearing to a Target.......................................................................5-1
Detecting Fish SchoolsAurally .............................................................................................5-1
Relocating Fish School for Easy Observation .......................................................................5-2
Function Keys (F1, F2)..........................................................................................................5-3
Event Markers, Own Ship Event Markers.............................................................................5-5

iii
INTERPRETING THE DISPLAY
Seabed Echoes .......................................................................................................................6-1
Fish Schools...........................................................................................................................6-2
Sea Surface Reflections .........................................................................................................6-3
Wake ......................................................................................................................................6-3
False Echo by Sidelobe..........................................................................................................6-4
Noise and Interference...........................................................................................................6-4
MAINTENANCE
Display Unit Maintenance .....................................................................................................7-1
Hull Unit Maintenance ..........................................................................................................7-2
TROUBLESHOOTING
When the Transducer Cannot be Retracted ...........................................................................8-1
Diagnostic Tests.....................................................................................................................8-3
SPECIFICATIONS.......................................................................................................9-1

iv
FOREWORD
A Word to CSH-7 Owners
Congratulations on your choice of the FURUNO CSH-7 Color Scanning Sonar. We are
confident you will see why the FURUNO name has become synonymous with quality and
reliability.
For over 40 years FURUNO Electric Company has enjoyed an enviable reputation for qual-
ity marine electronics equipment. This dedication to excellence is furthered by our exten-
sive global network of agents and dealers.
This equipment is designed and constructed to meet the rigorous demands of the marine
environment. However, no machine can perform its intended function unless operated and
maintained properly. Please carefully read and follow the recommended procedures for op-
eration 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-7 Color Scanning Sonar is a full-circle, multibeam electronic scanning
sonar which detects and instantaneously displays fish schools and underwater conditions in
16 colors on a 10" non-glare, high resolution CRT screen. Its ease of operation, versatility
and compact size make it the perfect match for any class of fishing vessel.
The main features of the CSH-7 are
• Compact size permits installation on smaller fishing boats.
• Vivid 16-color display provides intuitive recognition of seabed and concentration, distri-
bution and volume of fish schools.
• Markers and indications keep the operator abreast of fishing conditions.
• Remote controller (option) provides for armchair control of gain, range and tilt functions.
• New gain, range or tilt setting appears in large characters whenever corresponding con-
trol is adjusted.
• Function keys automatically setup the equipment to perform specific task.
• High power MOS FET transmitter ensures reliable operation under any condition.

v
System Configuration
CSH-7040
TRANSCEIVER UNIT
RECTIFIER
RU-3424
100-115 VAC/
200-230 VAC
1φ, 50/60 Hz
Ship’s Mains
24 VDC
HULL UNIT
600 mm stroke
400 mm stroke
CSH-7030
CSH-7031
* Interface Module CSH-7050 (option)
required to connect external equipment.
DISPLAY UNIT
CSH-7010
(*)
NAVIGATOR
CURRENT INDICATOR
GYROCOMPASS
SPEED LOG
TILT RANGE
GAIN
(Option)
(Option)
REMOTE
CONTROLLER
CSH-7020

1-1
OPERATIONAL OVERVIEW
Equipment Overview
All operations of the CSH-7 are carried out through the display
unitandthe remote controller(option). Theuncluttered,straight-
forward control panel of the display unit provides intuitive op-
eration.Ifyou changeacontrol setting you willsee the associated
reaction on the display almost immediately.
The handy remote controller provides armchair control of range,
gain and tilt functions.
ON
OFF 010
BRILL
GAIN
TILT
MENU
EVENT OFF
CENTER
F1 F2
R
COLOR SCANNING SONAR CSH-7
B
– +
– +
TX
d
c
BRILL
control
POWER
switch
RANGE
DIMMER AUDIO
DIMMER
control AUDIO
control
Trackball
Control
panel
TILT RANGE
GAIN
Figure 1-1 Display unit, Remote controller

1-2
Display Unit Control Panel Description
GAIN
TILT
MENU F1 F2
RB
– +
– +
TX
d
cTurns transmitter on/off; freezes the display. The lamp above the switch
lights when the transmitter is turned on and flickers when off.
Selects a picture display range. Also functions to select items on menu
screens. Note that this control turns endlessly in both directions.
RANGE
Adjusts receiver sensitivity. Adjust for clear presentation of fish echoes.
Also functions to change settings on menu screens.
Tilts the sounding beam between 0° and 55°. The current angle always
appears on the screen.
EVENT OFF
CENTER
Opens/closes the menu.
Function keys; execute assigned program when activated.
The lamp above a key lights when function is activated.
Inscribes/deletes an event marker.
Draws straight line, called bearing marker, from own ship position toward
the trackball marker and simultaneously draws a circle (range marker) with
a radius being the distance between the own ship marker and trackball
marker. Range and bearing data of the intersection of the two markers are
dislayed at the bottom of the screen. To turn off the range and bearing
markers, move the trackball mark near the own ship position and press
the R/B key.
Shifts screen center to cursor location.
Raises, lowers the transducer, respectively. Lamp above a key blinks
while the transducer is moving and lights when it stops.
Figure 1-2 Control panel description
Turning the Power On/Off
Power on
Press the power switch at the lower left corner of the display
unit to turn the power on/off. When the display unit is turned on
it checks itself for proper operation. (This test is described in
Chapter 8.)
Power off
Press the cswitch to retract the transducer. Wait until the lamp
above the switch lights and then press the power switch to turn
off the system.
Note:The transducer is automaticallyretracted into thetank even
if the power switch is pressed before retracting the transducer.
However, make it a habit to retract the transducer before turning
off the power.

1-3
Adjusting Screen Brilliance, Control Panel Backlighting
The BRILL control adjusts screen brilliance, and the DIMMER
control adjusts control panel backlighting.
Lowering the Transducer
Press the dswitch. The lamp above the switch blinks, and lights
when the transducer is fully lowered.
CAUTION
Do not exceed speed noted in the speci-
fications when operating the equipment
or lowering or raising the transducer.
The transducer may become damaged.
Do not press the cswitch during
lowering of the transducer, and do not
press the dswitch during raising of the
transducer.
The equipment may become damaged.
Selecting a Display Range
Operate the RANGE control to select a display range. The range
selected appears at the top center of the screen.
Setting the Tilt Angle
The tilt angle shows the direction to which the sound wave is
emitted. When the sound wave is emitted horizontally, the tilt
angle is said to be zero degrees and when emitted vertically, 90
degrees.
To set a tilt angle, operate the TILT lever. Watch the tilt angle
indication at the top right corner on the screen.The tilt angle can
be set in one-degree steps from 0 to 55 degrees.
Finding a proper tilt angle is important when searching for fish.
Below are tips for selecting tilt angle.