Furuno 821, 841 manual Safety Arrangements, Electrical Shock Hazard, Useable Environment

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SAFETY INFORMATION

Safety Arrangements

All known steps are taken in the design of this radar to ensure that electromagnetic radio frequency energy radiated by the equipment will not be a hazard to personnel. This is true if the following precautions are met.

Each piece of equipment is grounded to an adequate grounding terminal or the ship or any mobile unit which carries the equipment. The grounding line should be as short as pos- sible.

WARNING

Hazardous voltages. Can shock, burn or cause death.

Only qualified person- nel should work inside the units of the radar.

Electrical Shock Hazard

This equipment contains high voltages which can cause severe in- jury or death. Any installation, internal adjustment, servicing and repair must be performed by qualified service personnel totally fa- miliar with electrical circuits and servicing of the equipment.

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Ground both the Display Unit and the Antenna Unit

Both the display unit and the antenna unit must be grounded. An un- grounded unit can cause electrical shock when its metallic parts are touched and receive or give off electromagnetic interference.

Useable Environment

This radar is designed and manufactured to be used on board marine ves- sels. Use in other environments may cause interference to other equipment.

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Contents Marine Radar First Edition AUG Useable Environment Safety ArrangementsElectrical Shock Hazard Ground both the Display Unit and the Antenna UnitTable of Contents Foreword FeaturesDisplay Unit SPECIFICATIONS- ModelAntenna Unit Transceiver Module contained in radomeVibration Power supply & power consumptionProtection features Warm-up time Modulator switching methodReceiver front end MIC Michoeave IC Bandwidth 7 MHz Duplexer Ambiont temperatureInterface Nmea Model 821/841 Page Model 821/841 ConfigurationPrinciple of Operation How radar works Control Description OperationTurning the Radar On Off Display Indications and MarkersSelecting the Range Adjusting LCD Backlighting and Display ToneAdjusting Control Panel Brilliance TransmittingSTC MAN Auto Adjusting GAIN, STC, A/C Rain and FTCHow to tune manually Tuning the ReceiverAdjusting A/C Rain Adjusting FTCMeasuring the Bearing Measuring the RangeTarget on collision course with your vessel? Menu OperationMenu description 11 Display modes Selecting the Display ModeSelecting the Presentation Mode Window DisplayCU course-up WPT-UP waypoint-up Guard AlarmGuard Suppressing Radar InterferenceSuppressing Noise Interference Off Centering the DisplaySelecting Pulselength Navigation Data Display Echo TrailsPress the Menu key Select Nav Data and press the ENT key Echo Stretch magnifying long range echoesSelecting Unit of Measurement for Range Selecting Bearing ReferenceWatchman Erasing the Heading Marker Deselecting RangesDisplaying Navigation Data During Stand-by Visual Alarm Indications Outputting Cursor Position to NavigatorDisplaying Cursor Position, Range and Bearing to Cursor Super-refraction Interpreting the DisplayRadar Wave and Radar Horizon Target Properties and Radar Wave ReflectionBearing Resolution Range ResolutionFalse Echoes Multiple echoes Blind and shadow sectors Nautical Chart and Radar PictureTroubleshooting procedure Maintenance & TroubleshootingSafety Information Forming any maintenance orReplacing the Fuse Preventative MaintenanceTroubleshooting table TroubleshootingSelf Test Self TestAntenna Unit Installation InstallationRemoving packing materials Mounting platformVent tube How to fasten the radome base To the mounting platform Ships bow Removing packing materials 10 Antenna unit Model 841, inside view, shield cover removed 12 Optional mounting bracket installation for sailboat Display Unit Installation 13 How to mount the display unit 14 Display unit, rear view Procedure Option connectorInstallation Check List Displaying the Installation Menus Initial Adjustment of PictureRelative Bearing Alignment Entering Initial SettingsSweep Timing Closing the Installation MenusSignal cable connection Page Page Page Page Page Page Page