Furuno 841 MARK-2 manual Display Unit Installation, Mounting considerations

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7.Pass the cable through the hole at the bot- tom of the radome base.

8.Secure the cable with the cable clamping plate and gasket. Ground the shield and vi- nyl wire by one of the screws of the cable clamping plate.

9.Connect the wire to the RF unit.

to one of the screws

of the cable clamping plate

9-pin connector:

to J801 on MD-9208

4-pin connector:

to J802 on MD-9208

13-pin connector: to J611 on IF-9214

Figure 5-7 Signal cable, antenna unit side

J802

J801MD-9208

Cable entry

PTU-9335

J611

IF-9214

Figure 5-8 RF unit

10.Attach the EMC core supplied as shown below.

J801 J802

J804

Cable entrance

Cable clamping plate

J805 MD9208

J806

J803

Motor

EMC core E04SS251512 (Above cable J1 clamping

plate)

PTU-9335

J613

J611 IF9214

Figure 5-9 How to attach EMC core

11. Fix the shield cover. Do not pinch the cable.

12.Attach the radome cover, aligning triangle mark on radome cover with that on radome base.

Radome cover

Radome base

Figure 5-10 How to position the radome

cover

13.Loosely fasten the radome fixing bolts. You will tighten them after confirming magne- tron heater voltage.

5.2 Display Unit Installation

Mounting considerations

When selecting a mounting location for the display unit keep in mind the following points.

The display unit is designed and con- structed to be splashproof, thus it can be installed outdoors. You can even hose it down after a day’s outing. If it is to be in- stalled outdoors, we recommend installing it an enclosed cabinet, for maximum pro- tection against the marine environment.

The temperature and humidity of the mounting location should be stable and moderate. No LCD can provide adequate contrast if the ambient temperature is too extreme.

The display unit consumes only a moder- ate amount of power, so there is no need for forced air ventilation. However, you should provide adequate space behind and around the unit to permit circulation of air and to provide convenient access to the rear connectors.

Even though the picture is quite legible even in bright sunlight, keep the display unit out of direct sunlight or at least shaded because of heat that can build up inside the cabinet.

Locate the display unit in a position where you can view and operate it conveniently but where there is no danger of salt or fresh water spray or immersion.

The orientation of the display unit should be so the radar screen is viewed while the operator is facing in the direction of the bow. This makes determination of your position much easier.

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Contents Marine Radar B . N o . O M E 3 4 4 4 Safety Instructions Do not operate the equipment with wet hands Do not open the equipmentStay away from transmitting antenna Do not disassemble or modify the equipmentUse the correct fuse IiiTable of Contents Foreword FeaturesDisplay Unit SpecificationsAntenna Unit Transceiver Module contained in radomeInterface Nmea Complete Set Installation Materials CP03-15xxAccessories FP03-05900 Equipment ListOptional Equipment Model 841 MARK-2 ConfigurationPrinciple of Operation How radar works Control Description Operation675NM 220.9R 0.646NM 308.7R Display Indications and MarkersTurning the Radar On and Off 5NMSelecting the Range Adjusting LCD Backlighting and Display ToneAdjusting Control Panel Brilliance TransmittingGeneral procedure Adjusting GAIN, STC, A/C Rain and FTCSTC MAN Auto How to tune manually Tuning the ReceiverAdjusting A/C Rain Adjusting FTCMeasuring the Bearing Measuring the RangePress the Menu key to open the menu. The main menu appears Menu OperationSee the table on the next Menu Function Menu description11 Display modes Selecting the Display ModeCU course-up Selecting the Presentation ModeWindow Display Course-up, you may select CU or WPT- UP, on the menuWPT-UP waypoint-up Guard AlarmSetting the guard zone Silencing the audible alarmSuppressing Radar Interference Canceling the guard zoneOff Centering the Display Suppressing Noise InterferenceSelecting Pulselength Navigation Data Display Echo TrailsTurning echo stretch on or off Setting up the nav data displayEcho Stretch magnifying long range echoes Press the Menu key Select Nav Data and press the ENT keyTurning on watchman Selecting Unit of Measurement for RangeSelecting Bearing Reference WatchmanDisplaying Navigation Data During Stand-by Canceling watchmanErasing the Heading Marker Deselecting RangesDisplaying Cursor Position, Range and Bearing to Cursor Visual Alarm IndicationsError Visual alarm Outputting Cursor Position to NavigatorSuper-refraction Interpreting the DisplayRadar Wave and Radar Horizon Target Properties and Radar Wave ReflectionMultiple echoes Bearing ResolutionRange Resolution False EchoesIndirect echoes Side-lobe echoesNautical Chart and Radar Picture Safety Information Maintenance & TroubleshootingReplacing the Fuse Preventative MaintenancePeriod Check point Remarks But Then TroubleshootingSelf Test Self TestSiting, handling considerations Antenna Unit InstallationMounting Parallel with the fore and aft line Holes for antenna unitMounting considerations Display Unit InstallationDisplay unit is designed to be mounted on a tabletop Mounting procedureConnections Signal cable connectionHeading Sensor Connection To connect external equipment to the OP- Tion connectorFor E/S Navigation aid, video sounder connectionRadar Installation Check ListDisplaying the Installation Menus Initial Adjustment of PictureFollow the procedure below to obtain proper radar picture Relative Bearing Alignment Entering Initial SettingsSweep Timing Press the Menu key and turn off the power Closing the Installation MenusPage Page Page Page Page Page