Furuno 1712 User Manual
MARINE RADAR
Back
MODEL 1712
SAFETY INSTRUCTIONS
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel
should work inside the
equipment.
Turn off the radar power
switch before servicing the
antenna unit. Post a warning sign near the switch
indicating it should not be
turned on while the antenna
unit is being serviced.
Prevent the potential risk of
being struck by the rotating
antenna and exposure to
RF radiation hazard.
Do not disassemble or modify the
equipment.
WARNING
Use the proper fuse.
Fuse rating is shown on the equipment.
Use of a wrong fuse can result in equipment
damage.
Keep heater away from equipment.
Heat can alter equipment shape and melt
the power cord, which can cause fire or
electrical shock.
The useable temperature ranges are
Antenna unit: -25˚C to +70˚C
Display unit: -15˚C to +55˚C
CAUTION
WARNING LABEL
Fire, electrical shock or serious injury can
result.
Turn off the power immediately if water
leaks into the equipment or the equipment is emitting smoke or fire.
Continued use of the equipment can cause
fire or electrical shock.
The warning label shown below is
attached to the display unit. Do not remove
this label. If the label is peeling off or is
illegible, contact FURUNO for replacement.
To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.
WARNING
Name: Warning Label (1)
Type: 86-003-1011-1
Code No.: 100-236-231
i
COMPLIANCE WITH R&TTE DI RECTIVE 1999/5 /EC
This radar complies with the R&TTE Directive 1999/5/EC. In accordance with Article 6-3 of this
directive, FURUNO intends to put this radar on the market of the following countries in EU as well
other markets.
Austria, Belgium, Cyprus, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland,
Italy, Latvia, Lithuania, Malta, Poland, Portugal, Slovenia, Spain, Sweden, The Netherlands, United
Kingdom, Iceland, Norway
ii
TABLE OF CONTENTS
FOREWORD ..........................................iv
SYSTEM CONFIGURATION...................v
1. PRINCIPLE OF OPERATION .............1
2. OPERAT ION .......................................3
2.1 Turning the Radar On/Off.....................3
2.2 Transmitting, St and-by.........................3
2.3 LCD Tone and Brilliance.......................3
2.4 Control Description...............................4
2.5 Indications and Markers.......................5
2.6 Selecting the Range.............................5
2.7 Receiver Sensitivity..............................5
2.8 Suppressing Sea Clutter......................6
2.9 Suppressing Rain Clutter.....................7
2.10 Range Rings.........................................7
2.11 Cursor...................................................7
2.12 Menu Operation ...................................8
2.13 Heading Line........................................8
2.14 Control Panel Illumination....................8
2.15 Measuring the Range...........................9
2.16 Measuring the Bearing.........................9
2.17 Shifting the Display ............................10
2.18 Zoom ..................................................10
2.19 Target Trails........................................ 10
2.20 Guard Alarm Zone.............................. 11
2.21 Interference Rejector..........................12
2.22 Echo Stretch .......................................12
2.23 Watchman...........................................13
2.24 Navigation Data..................................13
2.25 Dis playing Navigation Data During
Stand-by .............................................14
2.26 Echoes in Blac k or White...................14
2.27 Selecting Ranges to Use....................14
3. RADAR OB SERVATION..................15
3.1 General...............................................15
3.2 False Echoes......................................16
3.3 SART..................................................18
3.4 Racon (Radar Beacon).......................20
4. MAINTENANCE,
TROUBLESHOOTING..................... 21
4.1 Maintenance.......................................21
4.2 Replacing the Fuse ............................21
4.3 Troubleshooting..................................23
4.4 Magnetron Replacement....................23
4.5 Antenna Motor Belt Replacement......23
SPECIFICA TIONS............................SP-1
Index
Declaration of Conformity
iii
FOREWORD
A Word to FURUNO MODEL
1712 Owners
FURUNO Electric Company thanks you for
purchasing the MODEL 1712 Marine Radar. We
are confident you will discover why the
FURUNO name has become synonymous with
quality and reliability.
For over 50 years FURUNO Electric Company
has enjoyed an enviable reputation for quality
and reliability throughout t he world. This
dedication to excellence is furthered by our
extensive global network of agents and dealers.
Your radar is designed and constructed to meet
the rigorous demands of the marine
environment. However, no machine can
perform its intended function unless properly
installed and maintained. Please carefully read
and follow the operation and maintenance
procedures set forth in this manual.
We would appreciate feedback from you, the
end-user, about whether we are achieving our
purposes.
Features
Your radar has a large variety of functions, all
contained in a rugged plastic case. All controls
respond immediately to the operator’s
command and each time a key is pressed the
corresponding change can be seen on the
screen.
The main features of the MODEL 1712 are
• Traditional FURUNO reliability and quality in
a compact, light-weight and low-cost radar.
• High definition 7-inch LCD shows echoes in
four shades of gray.
• Compact and light-weight radome antenna
with precision 41 cm microstrip radiator.
• Automatic control of sensitivity and sea
clutter suppression for simplified operation.
• Targets can be displayed in gray on white
background or vice versa, for optimal viewing
under any lighting.
• On-screen alphanumeric readout of all
operational information.
Thank you for considering and purchasing
FURUNO.
• Standard features include Display Shift, EBL,
Echo Stretch, Target Trail, Guard Alarm,
Interference Rejector, VRM, Zoom.
• Guard zone watches for targets entering (or
exiting) a guard zone.
• Watchman feature transmits at set intervals
to watch for targets entering (or exiting) the
guard zone.
• Operates on 12 V or 24 V power and
consumes approx. 40 watts power.
• Position in latitude and longitude, speed, and
range and bearing to a waypoint can be
shown in the bottom text area. (Requires
navigation data input in NMEA 0183 format.)
• LCD equipped with temperature sensor
which maintains viewability under
temperature change.
iv
SYSTEM CONFIGURATION
ANTENNA UNIT
ANTENNA UNIT
RSB-0087
OR
DISPLAY UNIT
RDP-134
External Buzzer
OP03-168
RSB-0060
Navigator (GPS, etc.)/
Video Sounder
OR
Remote Display
FMD-1712
Rectifier
PR-62
Ship's Mains
100/110/
220/230 VAC
1φ, 50/60 Hz
12-24 VDC
NMEA 0183
Video Sounder
Navigator (GPS, etc.)
Option
Local Supply
v
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vi
1. PRINCIPLE OF OPERATION
What is Radar?
The term RADAR is an acronym meaning RAdio
Detection and Ranging. It is a device which
measures the time it takes for a p ulsed signal to
be reflected back from an object.
How Ships Determined Position Before
Radar
The use of echoes to determine position did not
begin with radar. Ships would sound a short
blast on their whistles, fire a shot, or strike a bell
as an aid to navigation w hen running in fog near
a rugged shoreline. The time betw een t he
origination of the sound an d t he ret urning of the
echo indicated how far the ship w as from the
cliffs or the shore. The direct ion from which the
echo was heard indicated the rel at ive bearing of
the shore.
How Radar Determines Range
Radar determines the range t o t he t arget by
calculating the time difference between the
transmission of a radar signal a nd t he reception
of the reflected echo. It is a known fact t hat
radar waves travel at a nearly constant speed of
162,000 nautical miles per second. Therefore
the time required for a transmitted signal to
travel to the target and return as an echo t o t he
source is a measure of the range to the target .
Note that the echo makes a compl ete round tr ip,
but only half the time of trav el i s needed to
determine the one-way range to t he t arget . Thi s
radar automatically takes this into account in
making the range calculat ion.
How Radar Determines Bearing
The bearing to a target found by the radar is
determined by the direction in which the radar
antenna is pointing wh en it emits an electronic
pulse and then receives a return ing echo. Each
time the antenna rotates pulses are transmitted
in the full 360 degree circle, ea ch pulse at a
slightly different bearing from the previous one.
Therefore, if one knows t he direction in which
the signal is sent out, one know s t he direction
from which the echo must return.
Radar Wave Speed and Antenna
Rotation Speed
The speed of the radar waves out to t he t arget
and back again as echoes is extr emely fast
compared to the speed of rotation of the
antenna. By the time radar echoes h ave
returned to the antenna, the amount of antenna
rotation after initial transmission of the radar
pulse is extremely small.
The Radar Display
Targets are displayed on what is called a Plan
Position Indicator (PPI). This display is
essentially a polar diagram, w ith the tr ansmit tin g
ship’s position at the center. Images of target
echoes are received and disp layed at their
relative bearings, and at the ir distance from the
PPI center.
With a continuous displ ay of the images of
targets, the motion of targets is als o di splayed.
See the figure on the next page for a
comparison of actual situ ation and radar pict ure.
1
Targets
A
D
A
Heading Line
Range and bearing
to a target, relative
D
to own ship, are
readable on the
screen.
B
(A) Bird's eye view
of situation
C
Own ship
(radar)
B
(B) Radar picture of (A)
C
Own ship
at center
Note: Target bow or stern
is not discriminated.
Figure 1-1 Comparison of rad ar pict ure and actual situation
2
2. OPERATION
2.1 Turning the Ra dar On/Off
The [POWER] key turns the radar on/off. When
turning on the power, the control p an el lights
and the timer displays the t ime re ma ining for
warm up of the magnetron (the device which
transmits radar pulses), count ing down from
1:00 to 0:00.
Quick Start
Provided that the radar was once in use with
the transmitter tube (magnetron) still warm,
you can turn on the radar into TRANSMIT
status without the one-minute stand-by.
If the power switch has been turned off by
mistake and you want to restart the radar
promptly do the following:
1. Press the [POWER] key not later than five
seconds after power-off.
2. After ST-BY appears, press the [TX] key.
The radar is restored for full operation.
Note: If you press the [TX] key bef ore the
indication ST-BY appears, the buzzer sounds
and the radar does not transmit pulses.
When you won’t be using the radar f or an
extended period, but you want to keep it in a
state of readiness, press the [ TX ] key to set the
radar in stand-by. It is recommended to set the
radar in stand-by when it is not in use to extend
the life of the magnetron.
2.3 LCD Tone and Brilliance
1. Press the [TONE] key. The dialog box shown
in Figure 2-1 appears.
TONE: 12
▲
LOW HIGH
BRILL: 3
LOW ▼ ▲ HIGH
▲
2.2 Transmitting, Stand-by
After the power is turned on and the magnetron
has warmed up, ST-BY (Stand-By) appears at
the screen center, indicating the radar is ready
to transmit radar pulses.
Press the [TX] key to transmit. Echoes appear
in four levels of digitized video according to
echo strength. Note that w hen a target is
beneath a marker (VRM, EBL, heading line and
range ring) the part of the marker where the
target lies is display ed in reverse video.
Figure 2-1 Dialog box for adjust ment of
LCD tone and brilliance
2. Press
to adjust brilliance (0-9).
or to adjust tone (0-27); or
3
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