Furuno FR-8251, FR-8111 manual Problem Check point and probable Remedy Cause

Page 56

Problem

Check point and probable

Remedy

 

cause

 

 

 

 

 

 

Interference rejector

1. SPU Board

1.

Replace SPU Board.

inoperable

 

 

 

 

(interference rejection

 

 

 

 

level not displayed)

 

 

 

 

 

 

 

 

Echo Stretch

1. SPU Board

1.

Replace SPU Board.

ineffective (Neither

 

 

 

 

"ES1" nor "ES2" is

 

 

 

 

displayed.)

 

 

 

 

 

 

 

 

 

Only 2 parallel index

1.

Incorrect setting of index line

1.

Set index line interval referring to

lines (6 lines wanted)

 

interval

 

paragraph 1.18.

 

 

 

 

 

Range rings are not

1.

Press RINGS (PUSH)

1.

Replace associated circuit board if

displayed.

 

control to see if intensity is

 

unsuccessful.

 

 

increased.

2.

Replace control.

 

2.

Bad contact of control

3.

Replace SPU Board.

 

3.

SPU Board

 

 

 

 

 

 

Key beep inaudible

1. SPU Board

1.

Replace SPU Board.

 

 

 

 

 

Poor discrimination at

1.

Sea clutter control not

1.

Improper setting of A/C SEA effect

range

 

functioning properly.

 

is seen only at very close range.

 

 

 

 

Suspect inaccurate frequency of

 

 

 

 

crystal oscillator.

 

 

 

 

 

True Motion

1.

Poor contact of MODE key.

1.

Try to press MODE key a little

presentation not

2.

Selection is not accessed.

 

harder.

working correctly

3.

Speed entry is incorrect.

2.

Press MODE key until "TM"

 

4.

TM display inaccurate

 

appears.

 

 

 

3.

Enter correct own ship speed

 

 

 

 

referring to paragraph 1.23.

 

 

 

4.

Make sure that speed and compass

 

 

 

 

inputs are accurate.

 

 

 

 

Target not tracked

1. Poor definition of targets in

1.

Adjust A/C SEA and A/C RAIN

correctly

 

sea clutter

 

controls referring to paragraphs

 

 

 

 

1.11 and 1.12.

 

 

 

 

 

4 – 4

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Page 55 Page 57
Contents Marine Radar 00080735211 Safety Information Do not diassemble or modify the equipment Radio Frequency Radation Hazard IiiUse 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 Power Supply and Power Consumption Display UnitEnvironmental Conditions OthersXii Equipment ListsStandard Set Xiii Optional EquipmentSpare Parts Categorization by Specification XivOperation Control DescriptionDisplay Indications 25 NMDisplay indications lower part Transmitting, Stand-by Turning the Radar On/OffSelecting Range Presentation Mode Selecting presentation modeDescription Changing pages on the Initial menu Menu OverviewBasic menu operation Menu tree MK Erase erase all fixed marksInitial Tune SET AUTO, Manu SPD Mode MAN, LOG, NAV Tuning the Receiver Adjusting SensitivityAdjusting Picture Brilliance Selecting tuning modeAdjusting Brilliance of Control Panel and Markers Adjusting Range Ring BrillianceSuppressing Sea Clutter Automatic anti-clutter controlSuppressing Rain Clutter Heading and North MarkersMeasuring the Range Measuring range by the range ringsMeasuring Bearing Canceling the cursor offset Collision Assessment by Measuring Range Offset EBLIndex Lines Off-centering the PictureFunction key ZoomInscribing Marks on the Display Automatic speed input Own Ship SpeedTurning on a function Ship’s Graphic Interference RejectorEcho Trails Manual speed inputCanceling echo trail Starting echo trailTrail time Trail referencePlotting a target Electronic Plotting E-plotTrail brilliance Canceling target plotting Target dataTrue or relative vector Vector timeSetting a Guard Alarm Zone Setting a guard zoneSelecting guard zone type Activating the guard zonesWatch Alarm Silencing the aural alarmCanceling the guard zone and guard alarm How to turn on echo averagingSuppressing Second-Trace Echoes 26 Echo averagePresetting pulselength Echo StretchNoise 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 Bearing Resolution False EchoesIndirect echoes Multiple echoesMinimum and Maximum Ranges Side-lobe echoesMinimum range Blind and shadow sectorsLocating a Ship or Survival Craft in Distress by Sart Gain This page is intentionally left blank Maintenance When Working on the Antenna UnitPeriodic Maintenance Schedule Troubleshooting Simple TroubleshootingAdvanced-level Troubleshooting Serviceman qualificationProblem Check point and probable Remedy Cause Problem Check point and probable Remedy Cause Diagnostic Test Diagnostic test, test patternThis page is intentionally left blank Location of Parts Antenna UnitRF Transceiver Unit Modulator TriggerRF transceiver unit FR-8051/8111 Display Unit common to all models Display unit, top viewDisplay unit, right side view This page is intentionally left blank Performance Monitor Operating a 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.
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