Furuno FR-8111, FR-8251 manual Radio Frequency Radation Hazard, Iii

Page 5

WARNING

Radio Frequency Radation Hazard

The radar antenna emits electromagnetic radio frequency (RF) energy which can be harmful, particularly to your eyes. Never look directly into the antenna aperture from a close distance while the radar is in operation or expose yourself to the transmitting antenna at a close distance.

Distances at which RF radiation levels of 100 and 10 W/m exist are given in the table below.

 

 

Distance to

Distance to

RF power

Model

Radiator type

density on

100 W point

10 W point

 

 

antenna aperture

 

 

 

 

 

 

 

 

 

 

XN2 (4')

Nil

Nil

 

 

 

 

 

 

FR-8051

XN3 (6.5')

Nil

Nil

Not measured

(X-band, 6 kW)

XN3A (6.5')

Nil

Nil

 

 

 

 

 

 

 

XN4A (8')

Nil

Nil

 

 

 

 

 

 

 

XN2 (4')

 

 

11.0 W/m2

FR-8111

XN3 (6.5')

Worst case

Worst case

9.6 W/m2

(X-band, 10 kW)

XN3A (6.5')

0.25 m*

2.3 m*

9.6 W/m2

 

XN4A (8')

 

 

6.7 W/m2

 

XN2 (4')

 

 

29.0 W/m2

FR-8251

XN3 (6.5')

Worst case

Worst case

23.8 W/m2

(X-band, 25 kW)

XN3A (6.5')

0.6 m*

3.25 m*

23.8 W/m2

 

XN4A (8')

 

 

20.6 W/m2

Note: If the antenna unit is installed at a close distance in front of the wheel house, your adminis- tration may require halt of transmission within a certain sector of antenna revolution. This is pos- sible—Ask your FURUNO representative or dealer to provide this feature.

* UK DRA measured on FR-2810/2820. Other values by FURUNO.

iii

Page 4 Page 6
Image 5
Page 4 Page 6
Contents Marine Radar 00080735211 Safety Information Do not diassemble or modify the equipment Iii Radio Frequency Radation HazardUse the correct fuse Compliance with R&TTE Directive 1999/5/EC Table of Contents Maintenance Vii Features Word to FR-8051/8111/8251 OwnersForeword Configuration of FR-8051/8111/8251 Transceiver Module SpecificationsAntenna Unit Display Unit Power Supply and Power ConsumptionEnvironmental Conditions OthersXii Equipment ListsStandard Set Xiii Optional EquipmentSpare Parts Xiv Categorization by SpecificationControl Description Operation25 NM Display IndicationsDisplay indications lower part Transmitting, Stand-by Turning the Radar On/OffSelecting Range Selecting presentation mode Presentation ModeDescription Changing pages on the Initial menu Menu OverviewBasic menu operation MK Erase erase all fixed marks Menu treeInitial Tune SET AUTO, Manu SPD Mode MAN, LOG, NAV Adjusting Sensitivity Tuning the ReceiverAdjusting Picture Brilliance Selecting tuning modeAdjusting Range Ring Brilliance Adjusting Brilliance of Control Panel and MarkersSuppressing Sea Clutter Automatic anti-clutter controlHeading and North Markers Suppressing Rain ClutterMeasuring the Range Measuring range by the range ringsMeasuring Bearing Collision Assessment by Measuring Range Offset EBL Canceling the cursor offsetOff-centering the Picture Index LinesFunction key ZoomInscribing Marks on the Display Automatic speed input Own Ship SpeedTurning on a function Interference Rejector Ship’s GraphicEcho Trails Manual speed inputStarting echo trail Canceling echo trailTrail time Trail referencePlotting a target Electronic Plotting E-plotTrail brilliance Target data Canceling target plottingTrue or relative vector Vector timeSetting a guard zone Setting a Guard Alarm ZoneSelecting guard zone type Activating the guard zonesSilencing the aural alarm Watch AlarmCanceling the guard zone and guard alarm How to turn on echo averaging26 Echo average Suppressing Second-Trace EchoesEcho Stretch Presetting pulselengthNoise Rejection Selecting PulselengthSelecting pulselength set to use Waypoint DisplayOutputting Cursor Position TLL data Sector Blanking Alarm Output Signal On/OffSelecting Unit of Range Measurement, Bearing Reference This page is intentionally left blank Radar Picture, Target Properties and Radar Pulse Range ResolutionRadar Observation False Echoes Bearing ResolutionIndirect echoes Multiple echoesSide-lobe echoes Minimum and Maximum RangesMinimum range Blind and shadow sectorsLocating a Ship or Survival Craft in Distress by Sart Gain This page is intentionally left blank When Working on the Antenna Unit MaintenancePeriodic Maintenance Schedule Simple Troubleshooting TroubleshootingServiceman qualification Advanced-level TroubleshootingProblem Check point and probable Remedy Cause Problem Check point and probable Remedy Cause Diagnostic test, test pattern Diagnostic TestThis page is intentionally left blank Antenna Unit Location of PartsModulator Trigger RF Transceiver UnitRF transceiver unit FR-8051/8111 Display unit, top view Display Unit common to all modelsDisplay unit, right side view This page is intentionally left blank Operating a performance monitor Performance MonitorFluxgate Heading Sensor C-2000 Auto Plotter ARP-15Video Plotter RP-15 Page

FR-8251, FR-8111 specifications

Furuno has long been a leader in marine electronics, and its FR-8251 and FR-8111 radar systems continue that tradition. Both are advanced systems designed specifically for professional mariners who demand high performance, reliability, and technological sophistication in their navigational tools.

The Furuno FR-8251 is a powerful radar system that boasts a range of features tailored for commercial vessels. With a 25 kW transmitter, the FR-8251 delivers exceptional performance, providing a clearer and more detailed image of the maritime environment. It is equipped with advanced signal processing technology, including the Doppler processing feature, which allows for the detection of moving targets. This is highly beneficial for collision avoidance, as it provides accurate information regarding the speed and direction of other vessels.

Another noteworthy feature of the FR-8251 is its large, high-resolution display that enhances visibility and ease of use, even in challenging weather conditions. The user interface is straightforward, allowing for quick adjustments and easy navigation through the various settings. It supports a variety of display formats and allows for customization, enabling operators to tailor the information presented according to their specific needs.

On the other hand, the Furuno FR-8111 is equally impressive and designed as a more compact solution without sacrificing performance. This model comes with a 12 kW output and is specifically crafted for smaller vessels, yet it still delivers high-quality radar coverage. Utilizing Furuno’s renowned Automatic Target Tracker (ATT) technology, the FR-8111 enables mariners to efficiently track multiple targets, significantly enhancing situational awareness.

Additionally, both the FR-8251 and FR-8111 come with integrated ARPA (Automatic Radar Plotting Aid), providing users with sophisticated tools for navigation and collision avoidance. The presence of multiple target tracking empowers operators to make informed decisions, optimizing safety at sea.

Furuno’s commitment to reliability and durability is evident in both models, which are designed to withstand the harsh marine environment. Their robust build quality ensures longevity, while their advanced technologies offer peace of mind.

Both the Furuno FR-8251 and FR-8111 are excellent choices for professional mariners seeking cutting-edge radar systems. With their impressive performance, user-friendly interfaces, and advanced technologies, these radar systems set the standard in marine navigation, providing essential support for safe and efficient voyages.
Top Page Image Contents