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Furuno FR-7041R User's Manual

1. 0 230KM y HEEL a 23 0 R 123 7R I 0 270KM 0 070KM EN AN SS NAHI INN VRM2 Range Cursor Range VRM1 Range Interference Rejector Figure 1 24 Display indications and marks Cursor range and bearing and LIL position alternately displayed by ENTER key Heading display requires heading input Nothing appears when there is no heading input 2 Performance and Interpretation Overview As an aid to navigation radar can be a very valuable tool No other navigation aid can give you the ability to spot vessels com ing at you in the fog or tell you the location of the inlet to the harbor in the pitch black of night To help you understand better what your radar can and cannot do for you this chapter covers e the characteristics of the radar wave target properties and radar wave reflection e range and bearing resolution and false echoes The Radar Wave and Radar Horizon How the radar wave travels The radar wave tends to travel in straight lines at the speed of light However it is subject to bending or refraction in the atmo sphere the amount depending on region and density Super refraction Super refraction is a condition in which there is an upper layer of warm dry air over a surface layer of cold moist air Radar waves bend downward and thus increase the ranges at which targets may be detected Sub refraction Sub refraction is the reverse condition of super refractio
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3. ZOOM blinking appears at the top right hand corner when the zoom function is on D Set cursor where desired 2 Press ZOOM to double range Figure 1 15 Zoom function NOTE 1 The zoom function is inoperative when the display is shifted NOTE 2 If the cursor is not positioned within the current range when the ZOOM key is pressed several beeps are emitted and Ihe outermost range ring blinks twice even if the range rings are off Reposition the cursor and press the key again Canceling zoom Press the ZOOM key again 1 19 Shifting the Picture Your vessel s position can be shifted to view ahead or behind your vessel without changing the range or size of targets Procedure 1 Operate the trackball to set cursor where desired 2 Press the OFF CENTER key OFF CENTER appears at the top right hand corner of the dis play when the picture is shifted D Set cursor where desired 2 Press OFF CENTER Vessel s position shifts to cursor location Figure 1 16 Shifting the picture Canceling off center picture Press the OFF CENTER key again Guard Alarm The guard alarm allows the operator to set the desired range and bearing for a guard zone When ships islands landmasses etc violate the guard zone an aural alarm sounds and the offending target blinks to call the operator s attention Selection of guard zone type The guard alarm can be set to sound when a target either enters or exits th
4. EBL1 EBL2 Stand by ST BY Radar Alarm G IN G OUT G ACKN Echo Stretch ES1 ES2 Cursor Range Bearing or L L Position Echo Trailing TRAIL Trailing Time Trail ing Elapsed Time Navigation Data navigation input re quired Heading HDG heading sensor input required Interference Rejector Built in Output Data TLL target data and RSD NMEA 0183 format ENVIRONMENTAL CONDITIONS Ambient Temperature Scanner unit 25 C to 70 Display unit 15 C to 55 Humidity Relative humidity 95 or less at 40 vi POWER SUPPLY 10 2 to 41 6 VDC 85W or100V 110V 115V 220V 230V AC 50 60 Hz 19 rectifier required COLOR unt coe COMPASS SAFE Standard Steering DISTANCE Compass Compass Same EQUIPMENT LISTS Complete set Name eoumo ay remas XN12A RSB 0065 000 085 687 po 3 Installation Materials CP03 13001 See installation materlals on next page for details moso Jooss ira sooo Co _ Accessories Wame i 3 _ FP03 02920 008 224 760 vii Installation materials Name Tree Gly romas _ Signal Cable Assy S03 48 5 008 450 910 Select one Signal Cable Assy 503 48 10 008 441 340 10 Connector fitted at Signal Cable Assy 503 48 15 008 441 350 15 both ends Signal Cable Assy S03
5. appear on the same bearing of the reflected surface but at the same range as the direct echo Figure 2 7 illustrates the effect of an indirect echo Indirect echoes may be recognized as follows they usually occur in a shadow sector they appear on the bearing of the obstruction but at the range of the legitimate contact when plotted their movements are usually abnormal and their shapes may indicate they are not direct echoes LOSS Target Heading Mark True Echo Direct Path Scanner Indirect Path Obstruction Indirect Echo mast funnel etc Target Heading Mark Direct Path True Echo 9 Indirect Path Spf t E Indirect Echo Indirect Echo 32 Figure 2 7 Indirect echoes 3 Maintenance Precautions ADANGER HIGH VOLTAGE Stil alive at OFF Discharge before 4 DANGER Tum off radar before servicing scanner Wear safety beit This chapter tells you how to keep your radar in good working order Before reviewing this chapter please read the safety infor mation which follows ELECTRICAL SHOCK HAZARD This equipment uses high voltage electricity which can endan ger human life At several places in the unit there are high volt ages sufficient to kill anyone coming in direct contact with them While the equipment has been designed with consideration for the operator s safety precautions must always be exercised when reaching inside the equipment for the purp
6. the target The bearing to the cursor intersection appears at the bottom of the display Cursor range bearing and cursor position are alternately displayed by pressing the ENTER key 1 13 1 14 EBL1 Bearing 2 Bearing 135 Measuring bearing by EBL 1 Press the EBL1 or EBL2 key 2 Operate the trackball to bisect the target with the EBL 3 Check the EBL readout at the bottom left hand corner of the display to find the bearing to the target 6 0 KM 2 0 Target Cursor EBL1 shorter dash EBL2 Cursor Bearing Figure 1 10 How to measure bearing by EBL and cursor Erasing active EBL Press and hold down corresponding EBL key about two sec onds Displaying true or relative bearing The bearing readout for the EBL and the cursor can be displayed in relative or true bearing true bearing requires heading sensor input through the Mode amp Function menu Tips for measuring bearing Bearing measurements of smaller targets are more accurate the center of larger target pips is not as easily identified Bearings of stationary or slower moving targets are more ac curate than bearings of faster moving targets To minimize bearing errors keep echoes in the outer half of the picture by changing the range scale angular difference becomes difficult to resolve as a target approaches the center of the display Collision Assessment by the Offset EBL The origin of the EBL
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8. FURUNO OPERATOR S MANUAL MARINERADAR MODEL FR 7044R p FURUNO ELECTRIC LTD NISHINOMIYA JAPAN FURUNO ELECTRIC CO LTD 9 52 Ashihara cho Nishinomiya Japan 662 Telephone 0798 65 2111 Telefax 0798 65 4200 AII rights reserved Printed in Japan PUB OME 33940 TATA FR 7041R Your Local Agent Dealer FIRST EDITION JUL 1994 F MAR 4 1998 00 0806135 00x A SAFETY INSTRUCTIONS DANGER WARNING and CAUTION notices appear throughout this manual It is the responsibility of the operator and installer of the equipment to read understand and follow these notices If you have any questions regarding these safety instructions please con tact a FURUNO agent or dealer This notice indicates a potentially hazardous situation which if not avoided will result in death or serious injury This notice indicates a potentially hazardous situation which if not WARN avoided could result in death serious injury This notice indicates apotentially hazardous situation which if not CA U O N avoided could result in minor or moderate injury or property damage WARNING Hazardous voltage Can shock burn or cause death Only qualified personnel should work in the unit Turn off the power at the ship s mains switchboard before beginning the installation Post a warning sign near the switchboard to ensure the po
9. GEN Ces MT 29 PR Figure 1 1 Display unit Heading display requires heading input Nothing appears when there is no heading input Control Panel gt 2 e m a e Y INDEX ENTER lt 2 w S Q POWER Turns power on Press together with STBY TX to turn power off STBY TX Alternates between stand by and transmit ECONOMY Lights when economy mode is On NM KM Selects unit of range measure ment for nm or km NAV Turns navigation data on off RANGE selects range BRILL Adjusts display brilliance ZOOM Doubles size of area between your vessel and cursor loca tion ECHO TRAIL Displays target movement in afterglow INDEX Turns index lines on off EBL1 EBL2 Turns corresponding EBL on off ENTER TRGT PLT Registers settings on menu displays cursor L L position and cursor range bearing alternately outputs cursor position to external equip ment GAIN HM OFF Control Adjusts sensitivity of radar receiver Switch Temporarily erases heading mark AIC SEA ES Control Reduces sea clutter Switch Enlarges echoes A C RAIN FTC Control Reduces rain clutter Switch Reduces heavy precipitation clutter RINGS Turns range rings on off and adjusts their brilliance OFF CENTER Shifts vessel s position to cursor location GUARD ALARM Sets cancels guard alarm silences aural alarm EBL OFFSET Measures range a
10. Mounting the scanner housing Connections Only the multicore cable runs from the display unit to the scan ner unit Make the hole for passing the cable through the bulk head or deck at least 20 mm diameter In order to minimize the chance of picking up electrical interference avoid where pos sible routing the multicore cable near other onboard electrical equipment Also avoid running the cable in parallel with power cables Pass the cable through the hole and apply sealing com pound around the hole for waterproofing The procedure for connecting the multicore cable to the scanner unit is as follows 1 Through a pipe or waterproof cable gland fitted on the wheel house top or bulkhead 2 Remove the cable gland on the bottom of the scanner hous ing Ground Wire Fasten shield here Gl TIKAN NOTE Use the gasket attached inside the scanner unit for the previous cable RW 6537 Figure 3 3 Passing the multicore cable through the scanner housing 3 Pass the multicore cable through the scanner base and the cable gland removed in step 2 4 Secure the cable gland to the scanner base for complete wa tertightness 5 Connect the lead wires to the RTB Board on the bottom of the scanner housing by referring to the interconnection dia gram on page S 1 6 Attach the EMI core supplied as show below The core must be as closer to the cable gland as possible EMI Core RF Cable How to
11. can be placed anywhere with the trackball to measure range and bearing between any two targets as well as to assess the risk of collision Procedure 1 Tum on 2 Press the EBL OFFSET key EBL1 s origin shifts to cursor location 3 Operate the trackball to place EBL1 s origin cursor on the center of the target 4 Press the EBL1 key 5 Operate the trackball to pass EBL1 s origin through the cen ter of the display 6 Wait several minutes If the target tracks along EBL1 towards the center of the display your vessel s position it may be on a collision course with own vessel EBL1 Origin initial position of target Current position of Offset EBL 1 target Figure 1 11 Assessing risk of collision by using the offset EBL Canceling the offset EBL Press the EBL OFFSET key 1 15 Measuring Range and Bearing Between Two Targets 1 16 The procedure which follows shows how to measure the range and bearing between target A and target B in Figure 1 12 Procedure 1 Tum on EBLI 2 Turn on VRM1 3 Press the EBL OFFSET key EBL1 s origin shifts to cursor location 4 Operate the trackball to place EBL1 s origin cursor on the center of target A 5 Press the EBL1 key Operate the trackball to bisect target B with 1 Check the EBL1 readout to find the bearing between target and target B 7 Press the VRM1 key Operate the trackball to plac
12. equal in length to the trailing time selected is shown 3 Trailing continues For example the one minute trailing time is selected When the elapsed time clock counts up to 60 seconds the elapsed time display freezes at 60 all but the latest one minute of trails are erased and then trailing continues Continuous trailing The maximum continuous trailing time is 99 minutes and 59 seconds When the elapsed time clock counts up to that time the elapsed time display is reset to zero and trailing begins again Adjusting brilliance of afterglow The brilliance of the afterglow can be set for high or low on the Backlight Brilliance menu 1 25 Displaying Navigation Data 1 26 Navigation Navigation data can be displayed at the screen bottom if this radar receives navigation input in NMEA 0183 format Naviga tion data include e position in latitude and longitude or Loran C time differences one can be selected on the Nav Data menu e range bearing and time to go to both waypoint selected on external navaid and the cursor e speed and course If the navigation input includes destination data waypoint posi tion is denoted on the radar display by a dashed ring Turning navigation data on or off Press the NAV key Notes on navigation data NO DATA appears when no navigation data is received or wrong navaid is selected on the menu TTG data is displayed by asterisks when there is no
13. eub unie 1 8 O aa ala 1 8 Jhe DE EE DARREN LE 1 9 Measuring Range AC a a PE 1 12 Measuring Bearing a 1 13 Collision Assessment by the Offset EBL eese 1 15 Measuring Range and Bearing Between Two Targets 1 16 Suppressing Precipitation Returns 1 17 Suppressing Radar Interference 1 18 Enlareing an Area of Interest rir 1 19 SAMAEL the PICTATE T c 1 20 Goa ose nd a on ey 1 21 Trailing Target Movement 1 24 Displaying Navigation Data 0 ccccccsccssscesessssccesesssscsssececesseceeceecessesassesessezecness 1 26 Outputting Cursor Position to External Equipment eerte 1 27 Magnifying Long Range Echoes ccccccscssesessscecssscssssssssscsseessccesssecccseceeeecsanesses 1 27 hu ierit v AN 1 27 Display ing Index LINES ett usted RANA ede 1 28 Remo Con poll RC 1 29 Displaying Cursor Range and Bearing Cursor 6 1 29 Display Indications 1 30 2 Performance and Interpretation The Radar Wave and Radar 201 2 1 Target Properties and Radar Wave Reflec
14. including off Each time the key is pressed the newly se lected brilliance appears momentarily at the top of the display for your confirmation Erasing the Heading Mark About Tuning The heading mark continuously appears on the display and shows your vessel s heading When this mark obscures a target echo you can temporarily erase it by pressing and holding down the GAIN control Release the control to re display the heading mark The radar receiver can be tuned automatically or manually and the default tuning method is automatic In automatic tuning the radar is automatically tuned everytime the radar is switched to Tx and the indication TUNING appears during tuning The tuning bar at the top right hand corner of the display shows tuning condition Generally the longer the tuning bar the better the tuning condition however the length of the bar changes with number of radar echoes range and other factors Current tuning method is shown above the tuning bar as either AUTO or Tuning Bar AUTO or MANUAL Figure 1 5 Tuning bar For how to tune the radar manually see 5 Tuning on page 1 10 NOTE Automatic tuning may not work properly if own ship s radar receives the radar wave of another ship s radar If this is the case the radar will be out of tune Press the STBY TX twice to retune The Menu The main menu consisting of seven menus contains less often used functions which once preset do not
15. is a measure of the capability of a radar to display as separate targets the echoes received from two targets which are at the same range and are close together The principal factor which affects bearing resolution is horizon tal beamwidth Two targets at the same range must be separated by more than one beamwidth to appear as separate pips naga to Target isplay two 9 distinct target echoes Horizontal Beamwidth Direction of scanner rotation Target Horizontal Beamwidth Direction of scanner rotation Radar cannot display Figure 2 3 Bearing resolution False Echoes Occasionally false echoes appear on the screen at positions where there is no target In some cases the effects can be reduced or eliminated The operator should familiarize himself or herself with the appearance and effects of these false echoes so as not to confuse them with echoes from legitimate contacts Multiple echoes Multiple echoes occur when a short range strong echo is re ceived from a ship bridge or breakwater A second a third or more echoes may be observed on the display at double triple or other multiples of the actual range of the target as shown in Fig ure 2 4 Multiple echoes can be reduced and often removed by decreasing the sensitivity or properly adjusting the A C SEA True Echo SS Own Ship Target 4 Multiple Echo Figure 2 4 Multiple echoes Sid
16. not lift it by the radiator Mounting 1 Drill four bolt holes 213 mm for scanner housing and one multicore cable entry hole approx 50 mm diameter in the radar mast platform or the deck See the scanner outline draw ing on page D 2 2 Detach the scanner housing cover from the scanner housing by loosening four fixing bolts The scanner housing cover fitted with the transceiver module can be stored in a conve nient place until the wiring to the scanner unit is accom plished 3 Place the scanner housing on the chosen position and orient it as shown in Figure 5 1 A oN IN j c Ship s Bow P gt Ship s Bow A CORRECT B WRONG Figure 5 1 Orienting the scanner unit 4 Fasten scanner housing to mounting location a Coat washer and nuts with silicone sealant b Set seal washers to M12 x 60 hex bolts with the larger diameter of the washers under the bolt heads Insert bolts and seal washers from inside the scanner hous ing so they will not touch the transceiver module d Fasten the scanner housing to the mounting location with flat washers spring washers and hex nuts as shown in Figure 5 2 Fasten by turning the nut not the bolt to prevent damage to seal washer Coat exposed parts of nuts and washers as shown in Fig ure 5 2 N Hex Bolt 12 x 60 Seal Washer mm EWE Platform Silicone Sealant Flat Washer Spring Washer Hex Nut Figure 5 2
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18. require regular adjust ment To display or close the menu press the MENU key You can select menus sub menus and options by the trackball Note that the menu can also be displayed and options selected while the radar is in stand by MAIN MENU Select item by trackball and press ENTER key 1 Backlight Brilliance 2 P L amp Int Noise Rej 3 Nav Data 4 Mode amp Function 5 Tuning MANUAL 6 Self Check 7 Installation Setup 1 Press GAIN to temporarily hide menu Press MENU key to escape Figure 1 6 Main menu Menu description Table 1 1 Main menu description S 1 Backlight Brilliance 1 Panel Adjust panel backlighting 2 Heading Mark Adjust brilliance of heading mark 3 Other Marks Adjust brilliance of VRM EBL cursor guard zone and waypoint 4 Characters Adjust brilliance of characters Note that the brilliance of levels 1 and 2 are the same while the menu is displayed 5 Echo Trails Adjust brilliance of echo trails 1 Pulselength Select pulselength for 2 and 6 kilometer ranges 2 P L amp Int Noise Rej 3 Nav Data cont 4 Depth Unit Select depth unit for meter feet or fathom 5 Temp Unit Select unit of water temperature measurement for C or F 4 Mode amp Function 1 STBY Display Select function at stand by Display ST BY or navigation data or go into economy mode 2 Watchman Turn watchman on off Tx int
19. trackball Panel Heading Mark Other Marks Characters Echo Trails Press GAIN to temporarily hide menu Press MENU for main menu Figure 1 7 Backlight brilliance menu 4 Roll the trackball vertically to select sub menu 5 Roll the trackball horizontally to select option Current set tings are shown in inverse video 6 Press the MENU key twice to close the menu 1 11 Measuring Range 1 12 In the basic radar system your ship is in the center of the display and any target received appears in a map like projection through out 360 degrees This allows the range and bearing from your vessel to a target appearing on the display to be measured You can measure the range to a target three ways by the range rings bythe cursor and e by the VRM Variable Range Marker Measuring range by range rings To get a rough measurement of the range to a target use the range rings Press the RINGS key to turn on the range rings Further pressing of the key adjusts their brilliance or turns them off Each time the key is pressed the newly selected brilliance level appears momentarily at the top of the display for your con firmation To measure range by the range rings count the number of rings between the center of the display and the target Check the range ring interval and judge the distance of the echo from the inner edge of the nearest ring Measuring range by cursor To measu
20. use EMI core 7 Connect the inner shield of the multicore cable to the ground terminal at the bottom of the scanner housing Final preparation 1 Place the scanner housing cover onto the scanner housing Coat rubber gasket with grease Making sure the gasket rests properly in the groove fasten the four fixing bolts tempo rarily by hand SCANNER HOUSING PINNING HOLE Figure 5 4 Fixing the scanner housing cover 2 Coat the two slot pins with grease Using a wooden mallet to prevent chipping of paint insert the pins into the pin ning holes see Figure 5 4 until the pin head is flush with the scanner housing surface 5 5 Slot Pin Radiator Bracket This side protrudes more Ship s Bow than other side K Slot Pin Figure 5 5 Inserting of slot pins 3 Now is the time to fix the radiator to the radiator bracket Remove the red rubber cap on the radiator bracket and orient the radiator bracket as shown in Figure 5 5 Referring to Fig ure 5 6 apply anticorrosive silicone sealant to the radiator bracket as shown below and apply grease to the O ring and set it to the center of the radiator bracket Coat the radiator fixing bolts with silicone sealant Fix the radiator to the ra diator bracket with the FURUNO logo on the radiator facing ship s bow Antenna Radiator pe O ring 1419 Radiator Bracket NOTE Apply anticorrosive silicone sealant to areas marked by cross hatches to prev
21. waypoint data Waypoint Mark Data Range bearing and Time To Go TTG to waypoint v t may An 3 WAYPOINT sa aguy 0 Ba 49 9 0 17 VRM 5 TUTA O 230kM 13 SEEN 3TAKM NO 070KM 2204 Speed TTG to cursor location NG AG NEL E 38 Figure 1 20 Typical navigation data display Outputting Cursor Position to External Equipment Press and hold down the ENTER key about two seconds Magnifying Long Range Echoes Watchman Normally the reflected echoes from long range targets appear on the display as weaker and smaller blips even though they are compensated by the radar s internal circuitry The echo stretch function magnifies these small blips in all ranges to make them easier to see Two types of echo stretch are available ES1 which stretches echoes in bearing direction and ES2 which stretches them in both range and bearing directions Turning the echo stretch on or off Press the A C SEA control Each press changes the echo stretch function in the sequence of ESI ES2 and OFF ESI or ES2 ap pears at the top right hand corner of the display when echo stretch is on NOTE This function magnifies not only targets but also sea clut ter and radar interference For this reason be sure sea clutter and radar interference are properly suppressed before turning on the echo stretch The watchman function periodically transmits the radar for one minute to check for targets in a guard
22. 48 20 008 441 360 Signal Cable Assy 503 48 30 008 441 370 Power Cable Assy 0359235 000 134 086 Seal Washer CW 1053DX 000 850 02 4 Type CP03 13001 for scanner unit M12 x 60 SUS 304 000 862 191 Hex Nut M12 SUS 304 000 863 112 Flat Washer M12 SUS 304 000 864 132 Spring Washer M12 SUS 304 000 864 263 Slotted Pin G type 10 x 45 SUS 000 866 390 ESD SR 25 000 123 303 Spare parts Fuse FGBO 15 000 549 014 2 For 2V power 125VAC Fuse FGBO 10A 000 549 065 2 For 24V 32V power 125VAC Optional equipment Name GodeNe Qty Remarks RU 3423 000 030 443 For AC power NMEA Cable 5m 6pin 4 pin cross Busi Cover Jes Hood w Lens OP03 120 008 441 880 1 viii 1 Operational Overview BE AA PP ee ee Overview This radar is basically very easy to operate If you change a con trol setting you will see the associated reaction almost immedi ately on the screen Most keys carry abbreviated names to show their functions The same nomenclature appears on the display for your confirmation To familiarize yourself with the controls of your radar turn it on presuming it is installed and try operating some of the controls as you review this section 29m 234 8 bed wie toe ay E yu EE C Hin Es a z 7 H O Ej Big io sois an m fms 2 oma
23. 5 Ant Height 6 Operation Mode 7 Installation Setup 2 Press GAIN to temporarily hide menu Press MENU for main menu Figure 5 12 Installation setup 1 menu 3 Roll the trackball vertically to select item and horizontally to select option Press the ENTER key Repeat sequence for each item Refer to the table on the next page for guidance 5 13 Table 5 1Installation setup 1 menu description om 1 Key Beep Tum key beep response on off 2 Alm Sensor Lvl Select level of echo intensity which high Select source of heading data magnetic compass MAG or gyrocompass 4 Ant on Tx Select STOP to halt antenna rotation on transmission 6 Operation Mode Select radar operation mode master or slave 7 Installation Setup 2 Select to access Installation Setup 2 triggers guard alarm low medium or 3 Hdg Sensor GYRO menu This concludes operation on the Installation Setup 1 menu Leave the menu open to align heading adjust sweep timing etc on the Installation Setup 2 menu Aligning Heading You have mounted the scanner unit facing straight ahead in the direction of the bow Therefore a small but conspicuous target dead ahead visually should appear on the heading mark zero degrees In practice you will probably observe some small error on the display because of the difficulty in achieving accurate initial positioning of the scanner unit The following adjustme
24. AIN should be prop erly adjusted to be sure the alarm system does not overlook target echoes The minimum echo strength which triggers the alarm can be selected through the Installation Setup 1 menu 1 23 Trailing Target Movement 1 24 BRERA You can show the movement of all radar targets relative to your vessel in afterglow This function is useful for alerting you to possible collision situations Starting echo trailing Press the ECHO TRAIL key to start echo trailing Press the key again within three seconds to select echo trailing time namely trail length in minutes Trailing time is available in 15 seconds 30 seconds 1 minute 3 minutes 6 minutes 15 minutes 30 min utes and continuous TRAIL the echo trailing time selected and elapsed time appear at the top right hand corner of the dis play Then afterglow starts extending from all targets Elapsed time Ng TRAIL Echo Trail 0 03 30S lt Trailing time ma Normal Display Echo Trai OFF Echo Trail ON Figure 1 19 How the echo trail feature works NOTE Zf the range or mode is changed or the off center or zoom is turned on during echo trailing trailing is restarted Canceling echo trailing Press the ECHO TRAIL key What occurs during trailing Fixed time trailing 1 When the elapsed time clock counts up to the trailing time selected the elapsed time display freezes 2 The oldest portions of trails are erased so only the latest trail
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27. Radar Scanner Unit XN12A RSB 0065 C3380 G01 Table D 2 Schematic diagrams Drawing prawna no Page FURUNO a 3 3 RADIATOR S 1 25 XN8 M1761 1761M2 1931 1931M2 851 XN12A M1941 1941M2 19418 861 FR 7041 7041H 7061 AS _ FORWARD M12 BOLT 92 EL SEAL WASHER 10520 Nita ONS FS PLATFORM SL S Ol 2 5 gree aa Qr HEP 9315 N CENTER OF OF ROTATION PACKING 4 013 Be it RA FIXING HOLES bos 25048 57 70 AO ERS FW N CABLE ENTRY D Hg F Gk MOUNTING DIMENSIONS _ ae MN _ LA T5 NEA m a M si ITEM NAME MATERIAL QTY REMARKS ww 22 96 m z B TR RSB 1 XN12A APPROVED THIRD ANGLE PROJECTION TITLE Hines RSB 0062 65 ee DES L 4 RADAR SCANNER UNIT 23 N8 XNA e Be C3380 G01 E FURUNO ELECTRIC CO LTD Uv 13000 qp n 1 5 02030 Lie 95 2 ddas NU 5370 ONIXI 3 eI B Ri S32NV3NVSTIO DNIOQIANSS G3ONJWWOSOSH F LINA ONIX 4 303 SMIYIS 6f YO 54708 OIW 3SN SONA JO NOILVOJYOvI 303 NOILONIISNI NOILVTIVISNI OL 33434 oc JONYN3ALNIVW JOI GILIINNOO SITAVI JHL HLIM LNO NAVHG 38 NYO LINN JHL LVHL OS LINN AHL 30 MOVE JHL LY G3MOTTV PEE APAN QGINOHS SONI 18YO VYLXI LNAIOIAANS 1 ALON
28. TTT puwm TTT Spurious Rejection Better than 40 dB Modulator FET switching method Intermediate Frequency 60 MHz Tuning Automatic or manual for manual select manual tuning on menu and tune by trackball Receiver Front End MIC Microwave IC Bandwidth 7 MHz Duplexer Circulator with diode limiter DISPLAY UNIT Indication System PPI daylight display raster scan Picture Tube 12 inch rectangular 184 mm x 245 mm monochrome CRT effective display area more than 180 mm Range km Ring Interval km No of Rings Rage 0125 025 05 025 1 15 2 3 4 6 8 12 16 24 32 Ring Interval 00625 0125 0125 025 025 05 05 1 1 2 2 3 4 6 8 pue op 9194412 p p 4 Range Resolution Better than 15 m Bearing Resolution Within 1 9 Minimum Range Better than 25 m Bearing Accuracy Within 1 Range Ring Accuracy 0 9 of range or 8 m whichever is the greater VRM Accuracy 0 9 of range or 8 m whichever is the greater Markers Heading Mark Bearing Scale Range Rings Variable Range Marker VRM1 VRM2 Electronic Bearing Line 1 EBL2 Tuning Bar Cursor Index Lines Alarm Zone Way point Mark navigation input required North Mark heading sensor input required Alphanumeric Indications Range Range Ring Interval Pulselength SP MP LP Inter ference Rejection IR1 IR2 IR3 Variable Range Marker VRMI VRM2 Electronic Bearing Line
29. ain an echo from very small targets even at close range al though a large vessel may be detected at a much greater range in non shadowed sectors For these reasons the angular width and relative bearing of any shadow sectors should be determined For a new vessel this should be done during sea trials In other ships it should be done at the first opportunity after installing the radar Even a small shadow sector may hide another vessel if she is on a collision course with your vessel The bearing will remain con stant in the shadow area and the approach of the other vessel may remain undetected until it is too late to avoid a dangerous situation Two methods of determining the angular width of a shadow sec tor are Turn the boat very slowly through 360 while a small but clearly defined target is observed at a distance of a mile or so Do not use a buoy with a reflector as this target is too power ful to achieve the required result If the echo disappears while the boat is turning the target has entered a shadow sector and it will again become visible when the target emerges from the shadow Very quiet conditions of wind and sea are essential to ensure reliable results when this operation is carried out on a small craft since a rough sea can cause a buoy to be lost in the clutter or be temporarily submerged or hidden by waves An unsteady movement may cause the boat to swing through a shadow sector before the scanner has completed on
30. atitude and longitude and Loran TDs Input data required Cross Track Error Mark ffl shows direction and amount of error 1 6 5 Qmm 6 5 1 Figure 1 3 Typical navigation data display during stand by Notes on navigation data Availability of a particular display item depends on incoming data When Range to Waypoint becomes 0 1 nm the WPT mark jumps to dead ahead even though a difference may exist be tween heading and bearing to WPT When cross track error exceeds 1 nm XTE starts blinking Selecting a Range The range selected automatically determines the range ring in terval the number of range rings and pulse repetition rate for optimal detection capability in short to long ranges You can select which ranges and pulselength for 2 and 6 kilometer ranges to use through the Mode amp Function menu The range range ring interval and pulselength appear at the top left hand corner of the display Tips for selecting range Whennavigating in or around crowded harbors select a short range to watch for possible collision situations If you select a lower range while on open water increase the range occasionally to watch for vessels that may be heading your way Procedure Press the RANGE key Each time the range is changed the newly selected range appears momentarily at the center of the display for your confirmation Range is always displayed at the top left corner on the screen 1 5 A
31. cedure shown below 2 Measure voltage at test point TP803 5 and H6 on MD Board in scanner unit Voltage should 7 5V 0 1 Replace magnetron if voltage is not within that range Transmitting With Scanner Rotation Suspended 1 Tum off the power 2 While pressing and holding down the GAIN control hold at least three seconds press the POWER key 3 Press the MENU key 4 Operate the trackball to select 7 Installation Setup 1 and then press the MENU key 5 Operate the trackball to select 4 Ant on Tx and Stop 6 Press the MENU key twice to close the menu J1301 on CRT POWER Board Ao POWER Board PTU 9093 CRT Board See figure below for parts location N Photo No 3165 VR402 V SIZE VR201 H POSITION VR202 H HOLD VR205 SUB BRIGHTNESS VR204 BRIGHTNESS L204 H SIZE CRT Board Figure 4 1 Display unit cover removed top view and location of parts on the CRT Board SPU Board SPU 9096 N Photo No 3164 Figure 4 2 Display unit cover removed right side view BEARING SIG GEN Board MP 8070 TP803 5 6 MD Board MD 7918A N Photo No 2607 4812 J811 Figure 4 3 Transceiver module bottom view cover removed 4 5 IF Amplifier Case Magnetron V801 MG 5248 amp 571 L MIC U801 RU 8015 Circulator HY801 4356 Fan Motor N Photo No 3156 MMS 06C12DS R02 Figure 4 4 Transceiver module Scann
32. djusting Receiver Sensitivity The GAIN control adjusts the sensitivity of the receiver It works in precisely the same manner as the volume control of a broad cast receiver amplifying the signals received Procedure The proper setting is such that the background noise is just vis ible on the screen Adjust the sensitivity on the highest range the background noise is clearer on that range If you set up for too little sensitivity weak echoes may be missed On the other hand excessive sensitivity yields too much background noise strong targets may be missed because of the poor contrast be tween desired echoes and the background noise on the display 1 Transmit on long range 2 Adjust the GAIN control so background noise is just visible on the screen Suppressing Sea Returns Echoes from waves can be troublesome covering the central part of the display with random signals known as sea clutter The higher the waves and the higher the scanner above the wa ter the further the clutter will extend Sea clutter appears on the display as many small echoes which might affect radar perfor mance See the left hand figure in Figure 1 4 When sea clut ter masks the picture adjust the A C SEA control to reduce the clutter How the A C SEA control works The A C SEA control reduces the amplification of echoes at short ranges where clutter is the greatest and progressively increases amplification as the range increases so am
33. e guard zone You can select which type of guard alarm you want to use through the Mode amp Function menu In alarm The alarm sounds on targets entering the guard zone G IN appears at the top right hand corner when the In alarm is se lected Out alarm The alarm sounds on targets exiting the guard zone G OUT appears at the top right hand corner when the Out alarm is se lected DASHED LINE no alarm SOLID LINE alarm sounds IN ALARM OUT ALARM Figure 1 17 In and out alarms To select guard zone type 1 Press the MENU key and then select Mode amp Function by operating the trackball and pressing the ENTER key 2 Select 3 Alarm Mode and In or Out by operating the trackball 3 Press the ENTER key 4 Press the MENU key twice to close the menu 1 21 Setting a guard zone 1 Mentally create the guard zone you want to set 2 Referring to 1 in Figure 1 18 operate the trackball to set the cursor on point A or B Press the GUARD ALARM key G INY or G OUT with asterisk blinking appears at the top right hand corner of the display See Figure 1 18 2 The asterisk indicates the guard zone is partially set 3 Operate the trackball to set the cursor on point C or D See Figure 1 18 3 4 Press the GUARD ALARM key The asterisk disappears See Figure 1 18 4 A Blinking Guard zone you G IN or want to set G OUT A D C saa Set c
34. e lobe echoes Every time the scanner rotates some radiation escapes on each side of the beam This radiation is called side lobes If a target exists where it can be detected by the side lobes as well as the main lobe the side lobe echoes may be represented on both sides of the true echo at the same range as shown in Figure 2 5 Side lobes show usually only at short ranges and from strong targets They can be reduced through careful reduction of the sensitivity or proper adjustment of the A C SEA Main lobe True Echo Spurious Target Side lobe Scanner Side lobe Echo Figure 2 5 Side lobe echoes Blind and shadow sectors Funnels stacks masts or derricks in the path of antenna may reduce the intensity of the radar beam If the angle subtended at the scanner is more than a few degrees a blind sector may be produced Within the blind sector small targets at close range may not be detected while larger targets at much greater ranges may be detected See Figure 2 6 Vessel taller than wharf Wharf Mast etc in path of radar beam Wharf Blind Sector no echo Blind sector size depends on target size and range Figure 2 6 Blind and shadow sectors Indirect echoes Indirect echoes may be returned from either a passing ship or returned from a reflecting surface on your own ship for example a stack In both cases the echo will return from a legitimate contact to the antenna by the same indirect path The echo will
35. e revolu tion In any case an average of several observations of each shadow sector should be taken It is a waste of time to attempt the operation in anything other than very smooth water with little wind Another method is to observe the shadow sector against a background of sea clutter Any shadows will show as dark sectors in the clutter See Figure 5 15 Note that a shadow cannot be fairly estimated in heavy clutter as echoes from either side of the sector may be spread into it and give an illusion that objects in the sector are being observed Nor can it be satisfactorily determined in confined waters be cause of the probability of indirect false or multiple echoes be ing produced from nearby building or other vessels Shadow caused by mast Figure 5 15 Appearance of a shadow sector on the display Blind Sector Figure 5 16 Sample blind and shadow sectors Preventing Transmission in an Area When the antenna is installed at a close distance in front of the wheel house and this presents a rf radiation hazard the radar should be set to not transmit within this area Some authorities require this This feature can also be used to prevent transmis sion in a blind or shadow sector The maximum sector is 270 Entering area of no transmission 1 Display the Installation Setup 2 menu 2 Operate the trackball to select 5 Dead Sector and press the ENTER key 3 While monitoring the display operate the trac
36. e the out side edge of VRM1 on the inside edge of target B Check the VRM1 readout to find the range between target and target EBL 1 1 EBL1 Bearing 70 0 R are a VRM1 Range Figure 1 12 Measuring the range and bearing between two targets by using the offset EBL Canceling the offset EBL Press the EBL OFFSET key Suppressing Precipitation Returns The vertical beamwidth of the scanner is designed to see surface targets even when the ship is rolling However by this design the unit will also detect precipitation rain snow or hail in the same manner as normal targets Figure 1 13 shows the appear ance of precipitation on the display How to suppress precipitation returns Whenonly a slight amount of clutter is visible on the dis play raise the A C RAIN control setting slightly to distinguish targets from the clutter In heavy storms or partial clutter push in the A C RAIN control to activate the FTC Fast Time Constant circuit This circuit splits up unwanted echoes into a speckled pattern to distinguish solid targets from the clutter Precipitation clutter at central A C RAIN adjusted precipitation part of display clutter suppressed Figure 1 13 Effect of RAIN control Other uses of the A C RAIN In addition to reducing precipitation clutter the A C RAIN con trol can be used in fine weather to clarify the picture when navi gating in confined water
37. echnician Before reviewing this chapter please read the safety information which follows To the user If something appears to be wrong with your unit check it by referring to the troubleshooting table If you cannot restore nor mal operation please do not attempt to check inside any unit This equipment uses high voltage electricity which can cause severe injury or death Any repair work is best left to a qualified technician To the service technician There are many high tension points in this radar system Take special care when approaching the following parts e Power supply circuit display unit CRT circuit display unit Modulator circuit and magnetron transceiver unit Motor drive circuit Turn off the radar before servicing the antenna Troubleshooting Table This section provides a troubleshooting table for use by both the user and the service technician Table 4 1 Troubleshooting table e check fuse Measure input voltage the POWER does not light battery may have between 1 and 2 key to turn discharged terminals of J1301 on the on the radar check FIL Board POWER Board check POWER Board Voltage should be check illumination lamps 12V set 10 2V to 20 3V DC 24V 32V set 20 4V to 41 6V DC See Figure 4 1 for location of POWER Board nothing appears check CRT check CRT heater If lit on the display check CRT voltage CRT is normal panel lights check CRT Board O
38. ent corrosion Waveguide Flat Washer b SH Spring Washer amp 8 30 M8 x 30 Coat bolts with RADIATOR BRACKET Figure 5 6 Fixing the radiator to the scanner housing 4 Open the scanner housing cover and fix the stay as shown in Figure 5 7 Cable Tie MP Board Fasten ground wire here Figure 5 7 Scanner unit cover opened 5 One end of the cable with 15 9 and 7 way plugs has al ready been connected to the RTB Board inside the scanner housing Mate the 15 and 9 way plugs with jacks J812 and J811 on the transceiver module respectively Connect the 7 way plug to jack J701 on the MP Board Secure the cable between the RTB Board and J701 with the cable tie as shown in Figure 5 7 6 The black wire of the cable is the ground wire Fasten it to the chassis of the transceiver module with the ground screw shown in Figure 5 7 7 Close the scanner housing cover Display Unit Installation Tabletop mounting 1 Loosen the two M8 x 40 bolts at the front of the dis play unit Remove the fix ing plate Siting considerations The display unit can be mounted on a tabletop a bulkhead or on the overhead Install it where it can be viewed and oper ated conveniently but where it is protected from being sprayed or immersed in salt or fresh water Compass safe distance The magnetic compass may be af fected 1f the display unit is placed too close to it because of the magnetic fields
39. enus 1 Turn off the radar While pressing and holding down the GAIN control about three seconds press the POWER key This se quence opens the installation menus The multicore cable is securely retained against the mast or mounting platform and is free of interference from running The cable gland or entry on the deck if provided is water The power connections to the battery are of correct polarity The plugs at the rear of the display unit are tightly fastened The fuse on the rear panel of the display unit is 15A 12V 2 When ST BY appears press the TX key to trans mit 3 Select maximum range and adjust the GAIN control so the background noise is just visible on the display 4 Press the key several times to select the minimum range Adjust the A C SEA control to display nearby radar targets clearly on the screen Selecting options on installation setup 1 menu 1 Press the MENU key to display the menu MAIN MENU Select item by trackball and press ENTER key 1 Backlight Brilliance 2 P L amp Int Noise Rej 3 Nav Data 4 Mode amp Function 5 Tuning MANUAL 6 Self Check 7 Installation Setup 1 Press GAIN to temporarily hide menu Press MENU key to escape Figure 5 11 Menu 2 Operate the trackball to select 7 Installation Setup 1 and then press the ENTER key INSTALLATION SETUP 1 Select item and option by trackball 1 Key Beep 2 Alm Sensor Lvl
40. er Motor B801 RM 8711 Reed Switch S801 RS 1 Figure 4 5 Scanner unit cover opened 5 Installation Installation Precautions ELECTRICAL SHOCK HAZARD up cathode ray tube in the display unit uses a high tension of e alive at OFF scharge before Several thousand volts Unqualified personnel should not open Macho the display unit and the transceiver module in the scanner unit Wear a safety belt Wear a safety belt when working on the scanner unit Turn off radar before servicing Scanner Wear safety belt Scanner Unit Installation Siting considerations The scanner unit is generally installed either on top of the wheelhouse or on the radar mast on an appropriate platform It should be placed where there is a good all round view with as far as possible no part of the ship s superstructure or rig ging intercepting the scanning beam Any obstruction will cause shadow and blind sectors A mast for instance with a diameter considerably less than the width of the scanner will cause only a small blind sector but a horizontal spreader or crosstrees in the same horizontal plane as the scanner unit would be a much more serious obstruction you would need to place the scanner unit well above or below it It is rarely possible to place the scanner unit where a com pletely clear view in all direction is available Thus you should determine the angular width and relative bearing of any shadow sectors for their
41. erglass return much weaker echoes Vertical surfaces such as a cliff are good targets provided they face the radar Conversely horizontal and smooth surfaces such as mudbanks sandy beaches and gently sloping hills make poor targets because they disperse rather than reflect most of the en ergy that strikes them The strongest radar echoes known come from built up areas docks etc because these targets are less subject to changes in aspect These types of targets have three flat smooth surfaces mutually at right angles Some radar buoys are arranged this way so as to deliberately increase their detection range Range Resolution Range resolution is a measure of the capability of a radar to display as separate pips the echoes received from two targets which are on the same bearing and are close together The main factor which affects range resolution is pulselength Two targets on the same bearing close together cannot be seen as two distinct echoes on the display unless they are separated by a distance greater than one half the pulselength Radar able to Scanner Transmitted Wave da echoes AY Woes p 2 Received Wave Transmitted Wave n rem ES Received Wave Radar cannot display targets as separate echoes because they are too close together in range Superimposed on one another Figure 2 2 Range resolution Bearing Resolution Bearing resolution
42. erval is available in 5 10 or 20 minutes 3 Alarm Mode Select condition which triggers guard alarm in target enters guard zone or out target exits guard zone VRM Unit Select unit of measurement for VRM and cursor for nm km or sm 5 EBL Ref Select EBL reference for relative or true true bearing requires NMEA heading input Select useable ranges AUTO MANUAL Select automatic or manual tuning To tune manually 1 Select MANUAL by trackball 2 Press the ENTER key 3 While pressing and holding down the GAIN control operate the trackball to tune 4 Press the ENTER key 6 Self Check Test controls ROM and display program no Tx hours and radar on hours 7 Installation Setup 1 These menus are for use by service technicians They cannot be and 2 menus accessed during normal operation A 1 10 Menu operation 1 Press the MENU key to display the main menu 2 Operate the trackball to select a menu for example the Back light Brilliance menu As you move the highlighted cursor down through the menu each menu number initially shown in white on green inverses to green on white This shows the associated menu is available for selection Further menu se lection guidance appears at the bottom of the menu window 3 Press the ENTER key Figure 1 7 shows the Backlight Bril liance menu BACKLIGHT BRILLIANCE MENU Select item and option by
43. etic fields away from the equipment Magnetic fields will distort the picture and can cause equipment malfunction Be sure the unit is well away from equipment which gives off magnetic fields speaker power transformer etc Locating a Ship or Survival Craft in Distress by SART SART background The SART is required on vessels of 300 GT and above by the 1974 SOLAS Convention as amended in 1988 GMDSS Performance standard is specified in IMO Resolution A 697 17 SART activating conditions The SART should operate correctly when interrogated at a distance of up to at least five miles by a navigational radar complying with resolutions A 477 XII and 422 and 936 with an antenna height of 13 meters It should also operate correctly when interrogated at a distance of up to 30 miles by an airborne radar with at least 10 kW peak output power at a height of 3 000 feet How SART works Upon receiving a radar signal from a rescue party the SART automatically transmits a series of twelve frequency sweeps at a frequency between 9200 0 60 MHz and 9500 MHz 0 60 MHz The radar will represent twelve SART marks during one sweep cycle on the screen See the figure below Screen A When SART is distant Screen B When SART is close Radar antenna beamwidth SART pulsewidth be Sweep time 7 5 us 100 us The length of a SART mark depends on the radar s receiver bandwidth and sensitivity For
44. generated in the radar The compass safe distance is approximately 1 0 meters for the standard com pass and approximately 0 8 meters for the steering compass The display unit should be oriented so that you can view the screen while facing towards the bow This will make determi nation of your position easier The mounting location must be strong enough to support the display unit under vibration conditions normally encountered on the vessel If necessary reinforce the mounting location Make sure you allow enough clearance to get to the connec tors behind the unit Make sure you leave at least a foot or so of service loop of cables behind the unit so that it can be pulled forward for servicing or easy removal of the connec tors 2 Using the fixing plate as a template mark screw loca tions in the tabletop Drill four holes of 12 mm diam eter in the tabletop 3 Secure the fixing plate to the tabletop with M10 bolts nuts and washers 4 Lay the display unit on the fixing plate Secure it with the two 8 x 40 bolts loos ened in step 1 Cover the bolts with the two cosmetic caps supplied 7 iy 5 X 8 S M10 Bolts or 2 pcs 62 amp Q 2 2 pcs Fixing Plate A N Pa 100 Pag j 160 mi NA mw Figure 5 8 Tabletop mounting LS 29 Coach Screws Bulkhead or overhead mounting 1 Referring to Figure 5 9 change the location of
45. if you are uncertain of where the grounding points on your vessel are Remote controller connection Connect the remote controller to 71353 REMOTE External navaid connection By connecting an external navaid which has NMEA 0183 signal format own ship s speed position in latitude longitude and the range and bearing to waypoint can be input to this radar and be seen in the bottom text area Further waypoint position is marked on the scree and cursor position can be output to the navaid An NMEA cable fabricated with a connector is optionally sup plied Remove the NMEA IN OUT jack cap on the rear panel to expose the NMEA jack RSD signal is output from the NMEA IN OUT jack at the inter val of several seconds Depth Temp Data Heading sensor connection When a heading sensor outputs NMEA 0183 heading data to this radar digital heading indication the north mark and true EBL indication can be displayed The connection method is shown below Note that a gyrocompass cannot be connected Heading Sensor J1354 41354 Heading Sensor 2000 With Unit No I F Unit Monitor connection Connection of monitor buzzer REMOTE Connection of remote controller NMEA IN Connection of echosounder temperature indicator etc NMEA IN QUT Connection of navaid etc N Photo No 3169 A full function monitor FMD 8000 and or a remote radar dis play FMD 1800 can be connected to the SPU Boa
46. ill discover why the FURUNO name has become synonymous with quality and reliability For over 40 years FURUNO Electric Company has enjoyed an enviable reputation for quality and reliability throughout the world This dedication to excellence is furthered by our exten sive global network of agents and dealers Your radar is designed and constructed to meet the rigorous de mands of the marine environment However no machine can perform its intended function unless properly installed and main tained Please carefully read and follow the operation and main tenance procedures set forth in this manual We would appreciate feedback from you the end user about whether we are achieving our purposes Thank you for considering and purchasing FURUNO Features The FR 7041R 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 e Daylight viewing radar specially designed for small craft and sailing yachts Traditional FURUNO reliability and quality in a compact ra dar High definition 12 inch 30 centimeter raster scan display Precision 1 2 meter slotted waveguide antenna capable of withstanding 70 knot wind velocity Eight levels of target quantization for high target definition On screen alphanumeric readout of all operational informa tion Guard zone alar
47. influence on the radar at the first opportunity after fitting The method of determining shadow and blind sectors 15 shown later in this chapter The scanner unit should be mounted as high as possible on the boat to ensure best performance at maximum range In addition 1f there is a radio direction finder on the vessel lo cate its antenna clear of the scanner unit to prevent interfer ence to the direction finder separation of more than two meters is recommended Compass safe distance 1 0 meter standard compass and 0 74 meter steering compass should be observed to prevent deviation of the magnetic compass The interconnection cable run between the scanner and the display is 10 meters long If additional cable is required for a particular installation an unbroken length must be used namely no splices allowed and the maximum length is 30 meters Deposits and fumes from a funnel or other exhaust vent can adversely affect the aerial performance and hot gases tends to distort the radiator portion The scanner unit must not be mounted where it may be subjected to temperatures in excess of 70 C The scanner base is made of aluminum which will corrode if the mounting platform is made of iron For this reason paint the mounting platform if it is made of iron to prevent electrolytic corrosion e Do not paint the radiafor aperture to ensure proper emis sion of the radar waves To prevent damage to the scanner unit do
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49. kball to enter start of dead sector Press the ENTER key 4 Operate the trackball to enter end of dead sector Press the ENTER key 5 This concludes all adjustments on the installation menus Turn off the power to finish Area of no transmission Figure 5 17Appearance of area of no transmission on the display Cancelling area of no transmission Follow Entering area of no transmission on previous page and enter all zeroes Adjusting Magnetron Heater Voltage Magnetron heater voltage is formed at the MD Board of the scan ner unit and preadjusted at the factory for use with any length of signal cable Therefore no adjustment is required However verify heater voltage by following the procedure below 1 Turn on the radar and set it in stand by 2 Open the scanner housing cover Connect a multitester set to 10V DC range between 5 and 6 of test point TP803 on the MD Board in the scanner unit 3 Confirm that the multitester shows 7 5V 0 1 If it does not adjust potentiometer VR801 on the MD Board 4 Close the scanner housing cover and tighten the fixing bolts TP803 5 6 Li amt MD Board Potentiometer VR801 N Photo No 2607 Figure 5 18 Transceiver module bottom view cover removed List of Outline Drawings amp Schematic Diagrams BA AASA Table D 1 Outline drawings Drawing Type Drawing No Display Unit RDP 108 109 110 C3392 G01
50. m watches for targets entering or exiting a guard zone Operates on 12V 24V or 32V DC power supply and con sumes only 52 watts The CRT can be turned off automatically during stand by to reduce power consumption Ship s position in latitude and longitude ship s speed and range and bearing to a waypoint can be shown in the bottom text area with navigation input in NMEA 0183 format Remote control unit provides armchair control of range trans mission and screen off centering Target latitude and longitude position can be output to exter nal equipment Transmission can be prevented in a certain area Ask you ser viceman about this feature Specifications pa aa AA AN SENE E EHE SCANNER UNIT Radiator Slotted waveguide array Polarization Horizontal Antenna Rotation Speed 48 rpm nominal Radiator Length 120 cm Horizontal Beamwidth Less than 1 9 Vertical Beamwidth 22 Sidelobe Attenuation Within 20 of mainlobe less than 24 dB Outside 20 of mainlobe less than 30 dB Wind Speed Resistance Relative wind speed 51 5 m s 100 knots TRANSCEIVER MODULE Frequency 9410 MHz 30 MHz X band Modulation PON Peak Output Power 4 kW Transmitting Tube Magnetron MG5248 Warmup Time 2 minutes 30 seconds Pulselength PL amp Pulse Repetition Rate PRR Range kilometers Range kilometers PL PRR 0125 025 os oss 1 vs 3 4 e s 12 16 4 2 LLL 06s ___ L LL LLLI s
51. me but no radar waves are being transmitted Press the STBY TX key to transmit When the radar 1s transmit ting any echoes from targets appear on the display This radar displays echoes in eight intensity levels according to echo strength Each time the radar is powered it begins operation with last used settings for echo stretch menu display mode tuning method automatic or manual range display brilliance echo trail pic ture off center EBL VRM A C SEA and guard alarm Stand by When you won t be using the radar for an extended period but you want to keep it in a state of readiness place it in stand by by pressing the STBY TX key The display shows ST BY or navi gation data or goes into the economy mode depending on menu setting More on menu operation later The CRT can be set to automatically turn itself off through the Mode amp Function menu when in stand by to reduce power consumption This feature is called the economy mode Power consumption in the economy mode is 28W Navigation Data Display During Stand by Navigation data input by external navaid can be displayed dur ing stand by Navigation input required Figure 1 3 shows a typical navigation data display during stand by TO Waypoint bearing Heading ourse Time to go to TO Waypoint Bearing to TO Waypoint Range to TO Waypoint LAT 34 42 28N LON 138 24 12 36376 1 500060 4 Ship s position in l
52. n a layer of cold air is above a layer of warm air Radar waves bend up ward and thus decrease the ranges at which targets may be de tected Radar horizon Radar is essentially a line of sight phenomenon That means you have just about the same range to horizon with a radar as you do with your own eyes However under normal atmospheric conditions the radar horizon is 6 greater than the optical hori zon Therefore if the target does not rise above the horizon the radar beam cannot be reflected from the target The distance to the horizon from the scanner under normal con ditions is calculated by the following formula Rmax 4 12 x h2 Where Rmax Radar horizon kilometers h1 Antenna height meters h2 Target height meters Figure 2 1 Radar horizon Target Properties and Radar Wave Reflection Generally larger targets can be seen on the radar display at greater ranges provided line of sight exists between the scanner and target However a large target with poor reflecting properties may not be detected as easily as a smaller target with better re flecting properties For example you might expect a lighthouse to be a good radar target because of its size In actuality the return echo is weak since the conical shape diffuses most of the radiated energy A ship whose hull is made of conducting materials such as steel will return a relatively strong echo On the other hand hulls made from wood or fib
53. n the CRT Board adjust CONTRAST pot VR101 and BRIGHTNESS pot VR204 picture is not check CRT Board On the CRT Board adjust synchronized V HOLD pot VR401 and H HOLD pot VR202 but scanner does On the Installation Setup 1 not rotate menu confirm that Ant on Tx is set to ROTATE check scanner drive gears check scanner motor power circuit check scanner motor B801 NOTE This radar contains a power protection circuit which turns on when voltage is too high If the power cuts off suddenly it may be because the power protection circuit has actuated To restore normal operation press the POWER and STBY TX keys together sensitivity with both neither noise nor check IF AMP Board targets appear indications and markers do neither indications nor markers appear noise and targets do the sweep is not synchronized with scanner rotation sensitivity is poor check multicore cable between scanner and display for damage check SPU Board e check SPU Board check trigger line of signal cable for short measure magnetron current voltage e check modulator circuit check bearing pulse generator circuit in scanner check SPU Board measure magnetron voltage as prescribed above MIC may be out of tune keyboard may be faulty check SPU Board Measure magnetron voltage as follows 1 Transmit on max range with scanner rotation suspended See pro
54. nd bearing between two targets assesses risk of collision VRM1 VRM2 Turns corresponding VRM on off MENU Opens closes the menu Trackball e Shifts cursor EBL and VRM e Sets guard zone Selects menus options Shifts origin of EBL and VRM Turning the Radar On and Off A Timer CAUTION The radar scanner emits high frequency radio ra diation which can be harmful particularly to your eyes Never look directly into the scanner from a distance of less than two feet when the radar is in operation as you could injure the cor nea of your eyes Always make sure no person is near the scan ner unit before turning on the radar Turning on the radar Press the POWER key The control panel lights and a timer dis plays the time remaining for warm up of the magnetron count ing down from 2 29 to 0 01 Further the bearing scale range range ring interval pulselength and presentation mode are dis played The figure below does not show those indications and markers Function at stand by can be selected through the menu POWER Key a alin After 2 min and 30 sec 3 Figure 1 2 Display unit showing warmup sequence Turning off the radar Press POWER and STBY TX keys together Transmitting Stand by Economy Mode Transmitting After the power is turned on and the magnetron has warmed up ST BY Stand By appears at the screen center In stand by the radar is available for use at anyti
55. nt will compensate for this error 1 Identify a suitable target for example ship or buoy at a range between 0 125 to 0 25 nautical miles preferably near the heading mark To lessen error keep echoes in the outer half of the picture by changing the range Also be sure the zoom and off center functions are off 2 Operate the trackball to select 7 Installation Setup 2 on the menu display and then press the ENTER key INSTALLATION SETUP 2 Select item and option by trackball 1 Align Heading 2 Adjust Sweep Timing 3 On Hours 000001 5H 4 Tx Hours 000000 3H 000 000 Press GAIN to temporarily hide menu lt Press MENU for inst setup 1 gt Figure 5 13 Installation setup 2 menu 3 Operate the trackball to select 1 Align Heading and then press the ENTER key EBL1 appears on the display 4 Operate the trackball to bisect the target selected at step 1 with EBL1 and then press the ENTER key 5 Asa final test move the boat towards a small buoy and con firm that the buoy shows up dead ahead on the radar when it is visually dead ahead Adjusting Sweep Timing The radar measures the time required for a transmitted echo to travel to the target and return to the source The received echo appears on the display based on this time Thus at the instant the transmitter is fired the sweep should start from the center of the display sometimes called sweep origin A trigger pulse generated in the dis
56. ose of maintenance or service For this reason only qualified personnel totally fa miliar with electrical circuits and service manual should work inside the display unit or scanner unit Turn off the radar before servicing scanner unit Turn off the radar before servicing the scanner unit Maintenance Program Regular maintenance is important for good performance Always keep the equipment as free as possible from dirt dust and water splashes Make sure all screws securing the components are prop erly tightened A maintenance program should be established and should at least include the items listed in Table 3 1 Table 3 1 Maintenance program months Scanner unit fixing bolts Check for tightness and corrosion Replace corroded boits Apply coat of anti corrosive sealant to new bolts Radiator cleanliness Foreign material salt oil etc on the radiator will cause a considerable drop in radar performance Clean the radiator with a freshwater moistened cloth The only recommended cleaning agent is alcohol Antenna connectors Open the scanner unit and visually check all connectors for proper seating and corrosion The CRT vill in time DO NOT use chemical accumulate a coating of dust cleaners to clean any part of which tends to dim the the display unit They may picture Wipe the CRT remove paint and markings lightly with a soft clo
57. play unit goes to the scanner unit through the signal cable to trigger the transmitter magne tron The time taken by the signal to travel up to the scanner unit varies depending largely on the length of signal cable Dur ing this period the display unit should wait before starting the sweep When the display unit is not adjusted correctly the ech oes from a straight local object for example a harbor wall or straight pier will not appear with straight edges namely they will be seen as pushed out or pulled in near the picture cen ter See Figure 5 14 The range of objects will also be incor rectly shown 1 Correct 2 Target pulled inward 3 Target pushed outward Figure 5 14 Examples of improper and correct sweep timings 1 Transmit on the shortest range and confirm that the GAIN and A C SEA controls are properly adjusted 2 Visually select a target which forms right angles harbor wall straight pier 3 Press the MENU key if the menu is not displayed 4 Operate the trackball to select 2 Adjust Sweep Timing and then press the ENTER key 5 Operate the trackball to straighten target selected at step 2 and then press the ENTER key If measurement of blind sector or entry of area of not transmis sion is not necessary this concludes adjustment Turn off the power to finish Measuring Blind and Shadow Sectors 5 16 In some shadow sectors there may not be sufficient intensity to obt
58. plification will be normal at those ranges where there 1s no sea clutter Adjustment of the A C SEA control The proper setting of the A C SEA control should be such that the clutter is broken up into small dots and small targets be come distinguishable If the control is set too low targets will be hidden in the clutter while if it is set too high both sea clutter and targets will disap pear from the display In most cases adjust the control until clut ter has disappeared to leeward but a little is still visible wind ward 1 Confirm that the sensitivity is properly adjusted and then transmit on short range 2 Adjust the A C SEA control so small targets are distinguish able but some clutter remains on the display Sea clutter at display center A C SEA adjusted sea clutter suppressed Figure 1 4 How to adjust the A C SEA control Tip for adjusting the A C SEA common mistake is to over adjust the circuit so all the clutter is removed As an example set up for maximum A C SEA You will see how the center of the display becomes dark This dark zone can be dangerous targets may be missed especially if the sensitivity is not properly adjusted Always leave a little clutter visible on the display to be sure weak echoes will not be sup pressed If there is no clutter visible on the display turn off the circuit Adjusting Display Brilliance The BRILL key adjusts the brilliance of the display in sixteen levels
59. rd For wiring information see the interconnection diagram Echosounder temperature indicator connection Water depth and temperature can be displayed on the radar screen Connect echosounder or temperature indicator to the NMEA IN jack on the rear of the display unit DJ 1 Connect scanner cable here POW nn r Connect power cable here FUSE 12V 15A 24V 32V 10 E NEN WR OTOL CONC Ca CIA NT TERMIN Connect ground wire here Figure 5 10 Display unit rear view Nav Data Input Output Input NMEA 0183 format GP LC or any talker SX APB x XBWC SX SX GLL GLC S kX HDG SX XMDA x RMA SAARMB SkARMC SXXVTG S DBK DBS DBT SAAGTD HDM HDT x X MTW S4 X BWR DXX VHW AD 10 format Heading data Output NMEA 0183 format SRATLL SRARSD Checking the Installation After completing the installation it is a good idea to recheck it to be sure all steps were correctly done Use the installation check list below to check the installation Tick box to indicate comple tion The multicore cable is waterproofed at the scanner base aud rigging proofed O power or 10A 24V 32V power Adjustments on the Installation Setup 1 Menu 5 12 Overview This section covers adjustment of the radar after installation on the Installation Setup 1 menu Preparation These adjustments are done through the installation setup m
60. re range by the cursor rotate the trackball to place the cursor intersection on the inside edge of the target The range to the cursor intersection appears at the bottom of the display Cur sor range bearing and cursor position are alternately displayed by pressing the ENTER key Measuring range by VRM 1 Press either the VRM1 or VRM2 key The readout of the ac tive marker is circumscribed EBL1 EBL2 VRM1 VRM2 Figure 1 8 Display bottom showing location of EBL and VRM readouts 2 Operate the trackball to place the outside edge of the VRM on the inside edge of the target 3 Check the VRM readout at the bottom right hand corner of the display to find the range to the target Range 60 KM Range Ring Interval Target VRMI shorter dash VRM2 Range Rings Cursor VEM VRM1 Range VRM2 Range Cursor Range Figure 1 9 How to measure bearing by cursor range rings and VRM Erasing active VRM Press and hold down corresponding VRM key about two sec onds Unit of range measurement for VRM and cursor The VRM and cursor ranges can be displayed in nautical miles or kilometers with the NM KM key Measuring Bearing There are three ways to measure the bearing to a target by the bearing scale rough estimate e by the cursor and by the EBL Electronic Bearing Line Measuring bearing by cursor Rotate the trackball to set the cursor intersection on the center of
61. s However with the circuit activated the receiver is less sensitive Therefore turn the control fully counterclockwise off when its function is not required 1 17 Suppressing Radar Interference 1 18 Radar interference may occur when near another marine radar operating in the same frequency band as your radar Its on screen appearance is many bright dots either scattered at random or in the form of dotted lines extending from the center to the edge of the display Figure 1 14 illustrates interference in the form of curved spokes Interference effects are distinguishable from normal echoes because they do not appear in the same place on successive rotations of the scanner Figure 1 14 Radar interference To reduce radar interference 1 Press the MENU key to display the menu 2 Operate the trackball to select 2 P L amp Int Noise Rej 3 Press the ENTER key 4 Operate the trackball to select 2 Int Reject 5 Operate the trackball to select level of interference rejection IR and level selected appear at bottom right hand corner of the display 6 Press the MENU key twice to close the menu Enlarging an Area of Interest The zoom feature allows you to double the size of the area be tween your vessel and any location within the current range to take a closer look at an area of interest without changing the range Procedure 1 Select location with the cursor 2 Press the ZOOM key
62. stance between own ship and a coastline or partner ship They can be rotated by EBL2 and their width changed by VRM2 Figure 1 22 Index lines Remote Controller The remote controller provides armchair control of three func tions range off center and transmission stand by Operation is the same as corresponding controls on the display unit FURUNO Figure 1 23 Remote controller Displaying Cursor Range and Bearing Cursor Position The ENTER key displays cursor range and bearing and cursor latitude and longitude position alternately at the bottom of the display When there is no heading data asterisks appear instead of cursor latitude and longitude indication even if nav data is input 1 29 Display Indications Range Range Ring Interval Pulselength Cursor Guard Alarm EBLI EBL2 VRM1 VRM2 Range Ring North Mark EBL1 Bearing EBL2 Bearing 1 30 Cursor Bearing Tuning Bar Trailing Time Guard Alarm IN or OU ZOOM or OFFCENTE Elapsed Trailing Time Echo Stretch Heading Heading Mark AA HS EAR Va RAE NA HOG 234 o nag Y ES t 1 Area of no transmission actual sector determined at installation Navigation D L L Ship s position WAYPOINT TTG Range and bearing to WPT TTG to WPT TE 7 Tag LZL WAYPOINT TTG LU erga we er x IRZ LAPE gi EBL
63. th CRT anode and approach High tension on the CRT attracts dust and moist dust Will cause poor insulation Connectors on rear Check for proper seating panel of display unit and corrosion Have a qualified service technician clean the CRT anode and approach See Figure 3 2 See Figure 3 3 Replacing the Fuse The 10A 24V 32V or 15A 12V fuse on the rear panel of the display unit protects the equipment against reverse polarity of ship s mains overcurrent and equipment fault If the fuse blows find the cause before replacing it Never use a fuse rated for more than 10 or 15 since use of the wrong fuse can cause serious damage to the equipment and void the warranty Location of Parts Scanner Motor 8711 Reed Switch 801 RS 1 Scanner Gasket 03 018 3222 1 RTB Board Figure 3 1 Scanner unit radome cover opened ANODE HIGH VOLTAGE a SCANNE ANNER N Connector DJ 1 DP 1 external equipment Remote Controller Connector J1353 NMEA Connector J1354 input only NMEA Connector J1352 input output naa V KANAN Nana Ground POWER Power Fuse N Photo No 3169 Terminal Connector F1351 41351 Figure 3 3 Display unit rear view 4 Troubleshooting Precautions 4 DANGER lt Tum off radar before servicing scanner Wear safety belt This section provides troubleshooting information for the ser vice t
64. the bandwidth of 12 MHz the length is 45 meters approximately and for the bandwidth of 3 MHz usually on the 6 mile range or larger 12 meters approximately 9500 MHz 9200 MHz Radar receiver bandwidth To show the SART marks only on the radar display detune the radar receiver by turning the TUNE control out of best tuning condition This erases or weakens all normal radar echoes but the SART marks are not erased because the SART response signal scans over all frequencies in the 9 GHz band When the radar approaches the SART in operation the SART marks will enlarge to large arcs blurring a large part of the screen Reduce the sensitivity and adjust the sea clutter control of the radar Table of Contents U duri ir Aasa Specifications 1 Operational Overview Control Pane UR TR Feet aaa AWAN 1 2 Turning the Radar On and Off u s 1 3 Transmitung 5tand Dy ees aa KANINA KAANAK GL 1 4 Economy Mode aaa 1 4 Navigation Data Display During Stand by eese 1 4 BELCCUN DA RANGE deer 1 5 Adjusting Receiver Sensitivity ccscccssssssescessssssssssssssccossoreccerscensnssecesssseeses 1 6 DUPPLESSING Sed uo nean Cette ch aves vertus abes ia NG 1 6 Adjusting Display Brilliance eene cotes AKALA 1 7 Erasing the Heading Ap
65. the fixing plate mounting base bottom plate and cover Fixing Plate Mounting Base M8 40 Hex Bolts 2 pcs Cap 2 pcs 9 Coach Screw or d e i 5 M10 Hex Bolt M6 x 16 Hex Bolt 4 pcs M3 x 6 Pan Head Screw 4 pcs DISPLAY UNIT 7 777 Jut 4 10 Cosmetic Screw 6 pcs Cover Figure 5 9 Display unit bulkhead or overhead mounting Connections 5 10 The figure on the next page shows location of connectors on the rear of the display unit Several types of cables with connec tors for connection of external equipment are optionally avail able See the optional equipment list on page viii for details Scanner connection Connect the multicore cable from the scanner unit to connector DJ 1 on the rear of the display unit Power connection This radar is designed for 12 24 or 32 volt battery systems No modification is required except change of fuse A piece of gear of this quality deserves to have a circuit breaker dedicated to it alone The size of the wire feeding power to the unit should be no less than AWG 14 2 0 mm A power cable comes with the radar connect it to the power connector on the rear of the display unit Ground connection Run heavy ground wire from the grounding terminal at the rear of the panel of the display unit to the nearest grounding point on the boat Consult with a qualified electrician
66. tion 2 2 Range ROSO ON Ex 2 3 Bearing Resolution a aet 2 4 False PONOS iuis AA 2 4 3 Maintenance Maintenance PIOSTADI 3 2 Replacing AA EH 3 3 DOCAHOmn ob 3 3 4 Troubleshooting a a NA AA 4 1 Troubleshootine ote cedi cte a 4 2 Transmitting With Scanner Rotation Suspended eese 4 3 5 Installation ristallaton Precautions sa eode omne ME 5 1 Scanner AABANG 5 2 Display Unit Installati n 5 8 verd E be dcm 5 10 Checking the Installation a ANAN OR HERES eu EIN aes 5 12 Adjustments on the Installation Setup 1 Menu 5 12 Alienne Headin nascente cee ated ash at eee deorum edd 5 14 Sweep TIMONE 5 15 Measuring Blind and Shadow Sectors 5 16 Preventing Transmission in an Area cccsccessccseessescesreceneasesseenseseeneeseenseseeeenses 5 18 Adjusting Magnetron Heater 5 19 List of Outline Drawings amp Schematic Diagrams D 0 Foreword NES AN CM MA FURUNO Electric Company thanks you for purchasing the FR 7041R Marine Radar We are confident you w
67. ursor on point A or B and press To erase guard zone 1 2 and cancel guard J PAPUA many isappears a G IN or on point C Blinking G OUT or D G N or Guard Zone G OUT C Press 4 3 Figure 1 18 How to set the guard zone Silencing the aural alarm Any radar targets violating the guard zone will trigger the aural alarm You can silence the alarm by pressing the GUARD ALARM key When this is done ACKN replaces IN or G OUT This means the alarm is temporarily deactivated Press the key again to reactivate the alarm Canceling the guard zone and guard alarm Press and hold down the GUARD ALARM key until the guard Zone disappears Notes on the guard alarm The alarm is a useful anticollision aid but does not relieve the operator of the responsibility to also keep a visual lookout for possible collision situations The alarm should not be re lied upon as the sole means for detecting possible collision situations When the radar range is less than one half of the guard zone range the guard zone disappears and G INY G OUT appears in inverse video If this happens raise the range to re display the guard zone Atarget echo does not always mean a landmass reef ships or surface objects but can imply returns from sea surface or precipitation As the level of these returns varies with envi ronment the A C SEA A C RAIN and G
68. wer will not be applied while the radar system is being installed Electrical shock fire serious injury or death can result if the power is not turned off or is applied while the equipment is being installed N CAUTION Ground both the display unit and the antenna unit Ungrounded equipment can give off or receive interference or cause electrical shock Confirm that the power supply voltage is compatible with the voltage rating of the equipment Connection to the wrong power supply can cause fire or equipment damage The voltage rating appears on the label at the rear of the display unit Use only the supplied power cable Use of other power cables particularly a cables whose diameter is smaller than the supplied cable can cause fire or short circuit Use the correct fuse Use of a wrong fuse can cause fire or equipment damage NOTICE The installation must be done by a FURUNO representative or suitably qualified radar technician Authorities require this The mounting location must satisfy the following conditions Useable temperature 15 C to 55 C Out of direct sunlight Away from air conditioner vents Well ventilated Observe the compass safe distances to prevent deviation of a magnetic compass Standard Steering compass compass Display Unit 0 8 m Scanner Unit 07m 0 5 m Keep magnets and magn
69. zone If it finds change in the zone from the previous transmission it sounds the aural alarm cancels the watchman function and transmits the radar continu ously This feature is useful when you do not need the radar s function continuously but want to be alerted to radar targets in a specific area Tx ST BY Tx ST BY Tx D 1min 5 10 0r 20 min 1min 5 10 0r 20 min 1min Watchman starts Figure 1 21 How watchman works Turning on watchman 1 Create a guard zone usually 360 degrees with the guard alarm function 2 Press the MENU key 3 Operate the trackball to select Mode amp Function 4 Press the ENTER key 5 Operate the trackball to select 2 Watchman 6 Operate the trackball to select watchman rest period 5 min utes 10 minutes or 20 minutes 7 Press the ENTER key 8 Press the MENU key twice to close the menu WATCHMAN appears at the top of the screen the radar trans mits for one minute to check for targets inside the guard zone and then the CRT shuts off and the radar goes into stand by NOTE 1 Watchman can be used without a guard zone NOTE 2 The alarm sounds just before the radar starts and stops transmitting Canceling watchman Go into the Mode amp Function menu and set 2 Watchman for OFF Displaying Index Lines 1 28 Index lines max six lines can be turned on off by pressing the INDEX key The index lines are useful for maintaining a con stant di

Furuno FR-7041R User's Manual

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