Furuno DS-50 User manual

DOPPLER SPEEDLOG
DS-50
OPERATOR'S MANUAL
www.furuno.com
Model

The paper used in this manual
is elemental chlorine free.
・FURUNO Authorized Distributor/Dealer
9 52 Ashihara cho,
Nishinomiya, 662 8580, JAPAN
A
:
APR
1996
.
Printed in Japan
All rights reserved.
P2
:
FEB
.
01, 2019
Pub. No.
OME-72410-P2
(
ETMI
)
DS-50
0 0 0 8 0 7 5 6 8 1 3

i
Ni-Cd Pb
IMPORTANT NOTICES
General
• 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 recycling symbols in the future.
Cd

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ii
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 an object is dropped into
the equipment.
Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.
Do not place liquid-filled containers on
the top of the equipment.
Fire or electrical shock can result if the
liquid spills into the equipment.
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury can
result.
Keep the equipment away from rain
and water splash.
Fire or electrical shock can result if the
rain or water gets into the equipment.
Do not operate the equipment with wet
hands.
Electrical shock can result.
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.
Fuse rating is shown on the equipment.
Use of a wrong fuse can result in damage
to the equipment.
Do not use the equipment for other than
its intended purpose.
Improper use of the equipment can result
in personal injury or equipment damage.
Turn off the equipment immediately if
you feel it is abnormal.
Turn off the power from the switchboard if
the equipment is emitting strange noises
or becomes excessively hot. Contact your
dealer for advice.
The useable ambient temperature range
is 15°C
to 55°C.
Do not use the equipment out of the
above temperature range.
Do not place objects around the
equipment.
Overheating may result.
Do not power the equipment when the
transducer is in air.
The transducer may become damaged.
Handle all units carefully.
Damage can lead to corrosion.
Do not use chemical cleaners such as
alcohol, acetone and benzine to clean
the equipment.
Chemical cleaners can remove paint and
markings. Use only a soft, dry cloth. For
stubborn dirt, use a soft cloth moistened
with water-diluted mild detergent.
When dry docked remove marine life
from the transducer.
Remove marine life to maintain good
sensitivity.
Do not paint the transducer face.
Further, handle the transducer with
care.
Paint will affect equipment performance.
CAUTION

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iii
WARNING LABEL
A warning label is attached to the
units shown right. Do not remove the
labels. If a label is missing or is illegible,
contacta FURUNO dealer or agent about
replacement.
WARNING
To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.
Name: Warning Label (1)
Type: 86-003-1011-1
Code No.: 100-236-231
MAIN DISPLAY UNIT
DS-500
PROCESSOR UNIT
DS-510, DS-511
TRANSCEIVER UNIT
DS-520
Warning
label

iv
TABLE OF CONTENTS
INTRODUCTION ................................................................................................................1
SPECIFICATIONS .............................................................................................................2
SYSTEM CONFIGURATION .........................................................................................5
OPERATION ........................................................................................................................6
Controls and Indications on the Main Display Unit ........................................................... 6
Turning on the Power, Adjusting Panel Dimmer ..............................................................8
Selecting Speed Tracking Mode .........................................................................................9
Selecting Unit of Speed Measurement................................................................................9
Displaying Distance Run or Keel Clearance ......................................................................9
Setting Distance Run ........................................................................................................10
System Settings.................................................................................................................11
CONTROL BOX (option) OPERATION ..................................................................13
MAINTENANCE & TROUBLESHOOTING ............................................................14
Preventive Maintenance....................................................................................................14
Troubleshooting ................................................................................................................15
Operation Checks..............................................................................................................15
Error Displays.........................................................................................................................17
Program Number ..............................................................................................................17
PRINCIPLE OF DOPPLER SPEED LOG ...............................................................18
DIGITAL INTERFACE (IEC 61162-1 EDITION 2) ..................................... 19
LIST OF ABBREVIATIONS.........................................................................22
Declaration of Conformity

1
INTRODUCTION
The FURUNO DS-50 is a highly advanced, precision Doppler Speed Log incorporating FURUNO's
advanced computer technology. The DS-50 provides accurate display of speed over a wide range
from dead slow to 40 kn Speeds are detected relative to ground or water both fore/aft and athwart ship.
This feature ensures the safety and efficiency of navigation for ships operated under SOLAS 1974
and other ships.
Features
• Ground speed and water speed measurements. Three beam arrangement for highly accurate and
stable measurement.
• •Highly accurate speed measurement in shallow waters with under keel clearance as little as1
meter, enabling close control of speed for safe berthing and anchoring operations.
• •Ground tracking speed measured between 1 and 200 meters for accurate speed measurement in
coastal waters.
• •Wide variety of both analog and digital displays optionally available for remote monitoring.
• •Analog speed data and distance run signal, fed to various onboard equipment for improving
bridge automation.
• Conforms to the following standards: IMO A.824(19), as amended by MSC.96(72),
IMOA.694(17), IEC 61023, IEC 60945 (3rd edition), IEC 61162-1 (2nd edition).

2
SPECIFICATIONS
General Specifications
1. Ultrasonic frequency 440 kHz
2. Number of beams 3 beams for dual-axis speed indication
3. Measuring range and accuracy
Ship’s speed Fore/aft: -10.0 to +40.0kn
Port-Starboard: -9.9 to +9.9kn
Working depth Ground tracking: 1 to 200 m beneath the keel
Water tracking: 3 to 25 m below hull bottom. (It will change by
installation conditions and surrounding water conditions of
transducer. The measuring accuracy will be reduced for the
depth shallower than 30 m.)
Total distance run 0 to 99999.99 NM
Accuracy (ship’s speed) 1.0% or 0.1kn, whichever is greater. Rolling ±10°, pitching±5°
4. Display
Main display unit LED, Color: orange
Digital indicator LCD or LED
Nominal viewing distance 1m
Brilliance control Duty cycle of ON/OFF
5. Input/Output signals
Input External keying pulse: 2 ports
Output Ship’s speed: 2 ports (digital) 1 port (analog or through
distribution box)
Distance signal: 1 port (400 p/NM, forward data only)
Distance signal: 6 ports with contact closure signal,
200 p/NM, contact capacity 30 V, max 0.2A,
forward data only.
Alarm signal: 1 port (contact closure signal, contact
capacity 30 V, max 0.2 A)
Keying pulse: 1 port
Digital interface IEC 61162-1 2nd Edition: 2 ports VBW, VTG, VHW, VLW
(VTG is not output when these abed is not acquired. Heading
data in VTG and VHW is" null".)
6. Power supply 100/110/115/220 230 VAC, 50/60 Hz
7. Environmental conditions Standards: IEC 945 test methods
In-bridge units -15°C to +55°C
Relative humidity 95% at 40°C
Magnetic field No influence
Note: Performance may be affected by air bubbles, interference and other factors.

3
Specifications of DS-350/351 Digital Display (option)
1. Display device DS-350: LCD, DS-351: LED
2. Indication
Speed Fore/Starboard: .
Unit Port/Starboard: .
Direction (Fore/Aft), (Port/Starboard)
Mode Ground or Water tracking
Depth (clearance) .m
3. Other features Dimmer controls, Mode selector, Unit of speed selector
4. Power consumption DS-350: 12 VA, DS-351: 44 VA
Specifications of DS-370 Distribution Box (option)
1. Input signal (TTL level) Digital speed signal
Log signal (400 p/NM)
Alarm signal
Power on/off signal
2. Output signal The following output boards are available optionally.
(1) OTX board Serial signal for DS-350/351 Digital Indicator and/or cascade
connection of DS-370 Distribution Box (1 port /1board)
(2) ODD board BCD serial signal for DS-720/DS-370/DS-377 Digital Display
(Analog current signal for analog display, 1 board), -2.5mA to
10.0 mA/-10kn to 40kn or -3.33mA to 10.0mA/ - 10kn to 30kn
(3) OAD board Analog current signal for analog display, 1 board, -2.5mA to
10.0 mA/-10kn to 40kn or -3.33mA to 10.0 mA/-10kn to 30kn
(4) OLG board For Distance Indicator (1 port /1 board) and Log signal (3 ports
/1 board, 200/400 p/NM contact closure signal, 30V/0.2A or
RS-422 current loop signal). One Log signal port can be
modifiedforFore/aftstatussignalport(contactclosuresignal,
30 V/0.2A or RS-422 current loop signal).
(5) OAC board Ship’s speed current voltage signal (1 port /1 board), Cur-rent
signal (4.0mA to 20.0 mAI-10kn to max, speed,
max impedance: 250 ohms)
(6) OAV board Ship’s speed voltage signal (1 port / 1board), voltage signal
(-2.50 to 10.0 V/-10kn to 40kn, -3.33 V to 10.0 V/-10kn to
30kn, -4.00 V to 10.0 V/-10kn to 25kn, -5.00 V
to10.0V/-10kn to 20kn,max,impedance: l kohm)+ Fore aft
status signal (RS-422 current loop)
3. Power supply and power consumption
115/230 VAC, 1φ,50/60 Hz, 50 VA max

4
Specifications of DS-381SeriesAnalogDisplay (option)
1. Indication system Dual range system
2. Panel dimensions φ200 mm
3. Power consumption 5 VA approx.
Specifications of DS-382SeriesAnalogDisplay (option)
1. Indication system Dual range system
2. Panel dimensions φ200 mm
3. Power consumption 5 VA approx.
Specifications of DS-501 Control Box (option)
1. Installation method Flush mount
2. Power consumption 200mW max
3. Illumination LED
Specifications of DS-760 Series Analog Display (option)
1. Indication range -10 to 30kn
2. Panel dimensions DS-761/762: φ200 mm
DS-763: φ100 mm
3. Power consumption 5 VA approx.

5
SYSTEM CONFIGURATION
MAIN DISPLAY UNIT
DS-500 CONTROL BOX
DS-501 (option)
POWER cable
SIGNAL
cable
DIGITAL DISPLAY
DS-350/351 (option)
PROCESSOR
UNIT DS-511/510
SHIP’S MAINS
115/230 VAC,
DISTRIBUTION BOX
DS-370 (option)
DIGITAL DISPLAY
ANALOG DISPLAY
DISTANCE RUN INDICATOR
JUNCTION BOX
DS-360 (option)
TRANSCEIVER UNIT
DS-520
TRANSDUCER TANK
DS-531 or
GATE VALVE DS-532
TRANSDUCER
DS-530
Note: When Processor Unit DS-510
is used Transceiver Unit is
incorporated in the DS-510.
JUNCTION BOX
CI-630
(option)
TRANSDUCER TANK DS-331 /
TRANSDUCER DS-330
or
GATE VALVE for TRANSDUCER DS-335
RANGE
SWITCH BOX
DS-389, HF-22A
ANALOG INDICATOR
DS-381/382
MF-22A

6
OPERATION
Controls and Indications on the Main Display Unit
DOPPLER SONAR
DS-50
MODE
Keel Clearance
m/s
fa
DIMMER
NM
kn
ft
D istance
AL
G
W
A
S
▲
▲
▲
▲
SET and arrow keys
Set distance run. POWER
switch
Push here to
open lid.
DIMMER controls
Adjust brilliance.
(Default: 8)
Unit of keel clearance
or distance run:
ft (feet), fa (fathoms), or
NM (nautical miles)
Speed alarm*
Unit of speed (knot or
meters/second)
Test mode indicator
Fore and aft
direction indicators
Port and starboard
direction indicators
Port or starboard speed
Fore or aft
speed
Tracking mode
indicator
Ground
Water
Automatic
MODE selector
Selects tracking
mode.
Distance/Keel
Clearance selector
Displays distance run
or keel clearance. kn/m/s selector
Selects unit of
speed measurement.
ONURUFONURUF
*: If a speed error occurs, the "AL" lights in red.
When the normal speed is restored, this indication disappears.
Note: Performance may be affected by air bubbles, interference and other factors.

7
Control description
Main controls
MODE selector Selects tracking mode among ground, water and automatic. Each time the key is
pressed the tracking mode changes in the sequence of ground, water and
automatic. Current tracking mode is denoted by the tracking mode lamps.
Distance/Keel Displays distance run or depth below keel at each pressing.
Clearance selector "Distance" or "Keel Clearance" lights to show current selection.
DIMMER controls Adjust panel brilliance.
Controls in compartment
kn / m/s SET
Distance Set
POWER
WX
kn/ m/s selector Selects the unit of speed measurement; knots or meters/second.
SET key Setsdistancerundisplay.
Arrowkeys Set the distance run indication.
POWER switch Turns power on and off.

8
Turning on the Power, Adjusting Panel Dimmer
1. Press the [POWER] switch to turn on the power. The equipment is tested in the sequence below:
1) Communications test between main display unit and the processor unit is conducted. Three
zeroes blink about 30 s.
DOPPLER SONAR
DS-50
MODE
Distance
Keel
Clearance
Keel Clearance
m/s
fa
DIMMER
NM
kn
ft
D istance
AL
G
W
A
S
Zeroes blink for
about 30 seconds.
ONURUFONURUF
Power switch behind
the cover
2) Testing of main display and processor unit begins. Memory, LEDs and buzzer are tested in
order, each tested eight times consecutively. Then the program version number of both the main
display unit and the processor unit appear.
Keel Clearance
m/s
fa
NM
kn
ft
Distance
AL
G
W
A
S
Program Version NO.
of main display unit
Program Version NO.
of processor unit
The equipment is normal if the program version nos. appear. If an error is found an error message
appears instead of a program version number. Error messages are described on page 16.
3) The normal display appears, showing speed and distance run (or depth below keel).
2. Adjust panel dimmer with the [DIMMER] controls. Press the ▲or ▼to increase or decrease
the dimmer, respectively. Eight levels of dimmer are available. Selected dimmer appears below
the distance run and depth display for 0.5 seconds.

9
Selecting Speed Tracking Mode
Press the [MODE] selector to select speed tracking mode among water, ground or automatic. Select
the mode considering depth and speed. "G", "W" or "A" lights to show mode selected.
G:Measures and displays a speed relative to ground. The depth range usable for this mode is 1to 200
meters below the keel.
W:Measures and displays a speed relative to the water mass. The depth from the keel to the seabed
should be three meters or more.
Note: It is recommended to use the water tracking mode in operation with an ARPA for collision
avoidance task.
A:Automatically selects ground tracking mode or water tracking speed mode depending on depth.
Water tracking mode is selected when the keel clearance exceeds 200 meters.
Note: Actual working depth in the ground tracking mode depends on seabed and water conditions,
and the reflecting properties for sonic pulses.
Selecting Unit of Speed Measurement
Speed can be measured in knots or meters/second. Press the [kn/ m/s] selector to select the unit.
"kn" or "m/s" lights to show the selection.
Displaying Distance Run or Keel Clearance
Press the [Distance/Keel Clearance] selector to display distance run or keel clearance (depth) .
Distance run is always displayed in nautical miles. Keel clearance is the depth from the transducer to
the seabed, and can be displayed in meters, feet or fathoms. See page 11 for how to select unit of keel
clearance measurement.

10
Setting Distance Run
The distance run indication is backed up with an internal battery when the power is off. To reset or
change the distance run, do the following:
1. Open the lid at the bottom of the display unit and press the [SET] key. The display should look
like the illustration below, with the highest digit of distance run blinking.
2. Press
▲
or
▼
to place the blinking cursor on the digit to change.
3. Press ▲or ▼to set.
4. Repeat steps 2 and 3 to change other digits.
Note 1: Distance run can be reset to zero by entering all zeroes.
Note 2: To restore previous distance run setting, do not operate arrow keys or [SET] key for more
than 10 seconds. When this is done the distance run indication stops blinking and then the
previous setting is restored. Note that if the ship is moving at this time the distance run indication
will change.
5. Press the [SET] key.
12300
NM: Before pressing [SET] key
NM: After pressing [SET] key
1230000
Blinking

11
System Settings
The system settings do not require frequent adjustment. The table below shows setting range and
default setting for each parameter.
No. Item Setting Range Default Setting
1 Ground speed offset -12.8 to+12.7%, 0.1% steps 0%
2 Water speed offset -12.8 to +12.7%, 0.1% steps 0%
3 Transducer installation offset -12.8 to +12.7°, 0.1° steps 0°
4 Trim angle offset -12.8 to +12.7°, 0.1° steps 0.0°
5 Heel angle offset -12.8 to +12.7°, 0.1° steps 0.0°
6 Speed averaging 15, 30, 60, 90 sec 15 sec
7 Reference water speed depth 2.0 to 25.0 m, 1 m steps 2 m
8 External KP1 distance 0.0 to +300.0 m, 0.1 m steps 0.0
9 External KP2 distance 0.0 to +300.0 m, 0.1 m steps 0.0
10 Unit of keel clearance measurement m/ft/fa m
Note: The above settings are retained with an internal battery when the power is off.

12
Setting procedure
1. Turn off the main display unit. Turn on the power while pressing and holding down the
[Distance/Keel Clearance] selector. "1" indicates system setting no. 1 at the center of the display.
DOPPLER SONAR
DS-50
MODE
Keel Clearance
m/s
fa
DIMMER
NM
kn
ft
D istance
AL
G
W
A
S
FURUNOFURUNO
"1" appears.
Setting
(The number corresponds to that on
the table on page 11.)
Hinged cover
2. Press ▲or ▼to select system setting number to be changed.
3. Press Wor Xto change setting.
4. Press ▲or ▼to verify the data entered.
5. Turn off the power, and the new settings are entered in memory.

13
CONTROL BOX (OPTION)
OPERATION
The DS-501 Control Box provides remote operation of the main display unit. The [MODE],
[Distance/ Keel Clearance] and [DIMMER] controls function the same as those found on the main
display unit.

Note 1: Do not mix SEATENDER 20 with SEA GRANDPRIX 660HS, or apply one over the other.
Note 2: It is possible to remove SEATENDER 20 and replace the coating with SEA GRANDPRIX
660HS. To remove the current coating, soak a nylon-based scrubbing pad in thinners, then apply the
thinner to the coating in a washing motion. To prevent damage to the transducer, do not use tools
(scrapers, etc) or sandpaper to remove the coating.
SEATENDER 20 (no other paint allowed) anticorrosion paint.