Furuno 821 Operators Operator'S Manual Download Page 1

Page: 1 / 64

MARINE RADAR

MODEL

MODEL 821/841

Summary of Contents for 821 Operators

Page 1: ...MARINE RADAR MODEL MODEL 821 841...

Page 2: ...har a c ho Ni s hi nom i y a J apan Telephone 0798 65 2111 Telefax 0798 65 4200 Your Local Agent Dealer All rights reserved PUB No OME 34160 MODEL 821 841 YOSH FIRST EDITION AUG 1995 G JAN 11 2001 Pri...

Page 3: ...installation internal adjustment servicing and repair must be performed by qualified service personnel totally fa miliar with electrical circuits and servicing of the equipment Ground both the Display...

Page 4: ...Data Display 16 2 23 Echo Stretch 17 2 24 Selecting Unit of Measurement for Range 18 2 25 Selecting Bearing Reference 18 2 26 Watchman 18 2 27 Erasing the Heading Marker 19 2 28 Deselecting Ranges 19...

Page 5: ...asized We would appreciate hearing from you the end user about whether we are achieving our purposes Thank you for considering and purchasing FURUNO equipment Features Your radar has a large variety o...

Page 6: ...xer Circulator with diode limiter Display Unit 1 Indication system PPI raster scan 2 Display 8 inch diagonal LCD STN semi transparent yellow mode 3 Range scales nm Range Ring Interval 0 125 0 0625 0 2...

Page 7: ...n 12 V or 24V 10 2 V to 31 2 V DC 40 W approx 16 Protection features Protection against reverse polarity overvoltage overcurrent and internal fault 17 Compass safe distance SPECIFICATIONS MODEL 841 An...

Page 8: ...terval Range and Bearing to Cursor Off Center OFF CENTER Watchman WATCHMAN With navigation input option Course CRS Latitude and longitude Speed SPD Range and bearing to waypoint WP Cross Track Error X...

Page 9: ...VTG VHW Heading True HDT VHW HDG VHW HDM Heading Magnetic HDM VHW HDG VHW HDM Course True RMA RMC VTG Course Magnetic VTG RMA RMC Waypoint L L Range Bearing RMB BWC BWR Loran time difference RMA GLC...

Page 10: ......

Page 11: ...Equivalent to NMEA0183 Option IEC 1162 IEC 1162 In Out In Fluxgate Heading Sensor C 2000 Antenna Unit MODEL 821 Remote Display FMD 811 External Alarm Buzzer OP03 136 Rectifier RP 62 10 2 31 2VDC 115...

Page 12: ...half the time of travel is needed to deter mine the one way distance to the target This radar automatically takes this into account in making the range calculation 1 4 How Radar Determines Bearing Th...

Page 13: ...ship radar D A B C Heading marker Targets Own ship in center Range and bearing of a target relative to own ship are readable on the PPI A Bird s eye view of situation B Radar picture of A Figure 1 1 H...

Page 14: ...dar range Plots targets trails Opens closes menus Turns the VRM on off Turns the EBL on off ENT MENU ECHO HM OFF RANGE TONE BRILL EBL VRM TRAIL RINGS GUARD OFF CENTER DISP MODE ST BY TX POWER Erases h...

Page 15: ...ress the POWER key to turn the radar on or off The control panel lights and a timer displays the time remaining for warm up of the magnetron the device which produces radar pulses counting down from 2...

Page 16: ...navigating 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 ves...

Page 17: ...e background noise on the display How to adjust STC suppressing sea clutter Echoes from waves can be troublesome covering the central part of the display with random signals known as sea clutter The h...

Page 18: ...te In addition to reducing clutter the FTC can be used in fine weather to clarify the pic ture when navigating in confined waters How ever with the circuit activated the receiver is less sensitive The...

Page 19: ...asure the range to a target three ways by the range rings by the cursor and by the VRM Variable Range Marker By range rings Press the RINGS key to display the range rings Count the number of rings bet...

Page 20: ...BL on the target If it tracks along the EBL as it approaches the screen center it may be on a collision course with your vessel 2 12 Menu Operation The menu consisting of 6 sub menus mostly contains l...

Page 21: ...uard zone or OUT alarm to targets exiting the guard zone 4 Selects VRM unit nm km or sm 5 Selects EBL reference relative or true 6 Selects ranges to use Select range to enable disable and press ENT ke...

Page 22: ...n one of the sequences shown below depending on equipment connected and menu settings Note In the window display mode the DISP MODE key reselects zoom area To select the display mode while in the wind...

Page 23: ...es a dashed circle and the cursor can be moved indepedently To reselect area to zoom press ENT or DISP MODE and follow steps 2 and 3 Figure 2 12 How to select the area to zoom 2 15 Selecting the Prese...

Page 24: ...ard zone type The guard alarm can be set to sound on tar gets entering guard in or exiting guard out the guard zone Select type of guard zone as follows 1 Press the MENU key to display the menu 2 Sele...

Page 25: ...cursor here 1 Mentally create the guard zone to set G IN 3 Drag cursor to bottom right corner of zone and press GUARD 4 Guard zone completed G IN Guard zone Drag cursor here Figure 2 14 How to set a g...

Page 26: ...be selected to short or long on the 1 5 and 3 nautical mile ranges 1 Press the MENU key 2 Select P L Int Noise Rej ES and press the ENT key 3 Select Pulselength to SHORT or LONG 6 Press ENT and MENU...

Page 27: ...ted When the elapsed time display freezes at 60 seconds all but the latest one minute of trails are erased and then trailing continues Continuous trail The maximum continuous trail time is 99 minutes...

Page 28: ...Loran C and other 4 Select Nav Data Disp to OFF or ON 5 Select Pos Disp Mode to L L latitude and longitude or TD Loran C 6 Select unit of depth measurement to meters fathoms or feet 7 Select unit of...

Page 29: ...can be displayed relative to north relative bearing or relative to true north true bearing as follows True bearing re quires heading sensor input 1 Press the MENU key 2 Select Mode Function and press...

Page 30: ...ic pressure appears in graph form on the navigation data display during stand by If your navigation aid can output data in NMEA 0183 data format your vessel s position in latitude and longitude the ra...

Page 31: ...d longitude or the range and bearing from own ship to the cursor You can select the indication desired by pressing the HM OFF key 2 32 Visual Alarm Indications This radar display various visual alarms...

Page 32: ...ated energy A ship whose hull is made of conducting materials such as steel will return a rela tively strong echo 3 INTERPRETING THE DISPLAY As an aid to navigation radar can be a very valuable tool N...

Page 33: ...earing Resolution Bearing resolution is a measure of the capa bility of a radar to display as separate tar gets the echoes received from two targets which are at the same range and are close together...

Page 34: ...c tual range of the target as shown in Figure 3 4 Multiple reflection echoes can be re duced and often removed by decreasing the sensitivity or properly adjusting the STC Figure 3 4 Multiple echoes Si...

Page 35: ...dar can not show targets which are below the hori zon show a target which is hidden by a larger one see around corners for example sea wall distinguish between two targets which are very close togethe...

Page 36: ...only qualified personnel totally fa miliar with electrical circuits and service manual should work inside the display unit or scanner unit RF RADIATION HAZARD The radar scanner emits high fre quency...

Page 37: ...e l C e c n a m r o f r e p n i p o r d r e t a w h s e r f a h t i w e m o d a r g n i n a e l c d e d n e m m o c e r y l n o e h T e s u t o n o D l o h o c l a s i t n e g a n a c y e h t s t n e...

Page 38: ...a h r a d a r e h t u o y d n a p u d e m r a w e h t d e s s e r p o t y e k X T Y B T S t i m s n a r t t o n s e o d a n n e t n a e h t e t a t o r t i n u a n n e t n a n i e b y a m m e l b o r...

Page 39: ...press a key Its corresponding location on the display lights in black if the key is operating prop erly 4 To escape the test press the MENU key The ROM and RAM are automatically checked If NG No Good...

Page 40: ...finder antenna to prevent interference to the direction finder In order to minimize the chance of pick ing up electrical interference avoid where possible routing the signal cable near other onboard e...

Page 41: ...ube fitted on the base of the radome allows the radome to breathe while not allowing entry of water from outside into the radome Be sure the tube is kept free of foreign ma terials and is not pinched...

Page 42: ...latform Wiring and final preparation inside the antenna unit for MODEL 821 1 Drill a hole of at least 27mm through the deck or bulkhead to run the signal cable between the antenna unit and the display...

Page 43: ...6 Put the radome on the radome base as sembly The arrow should face toward the bow Figure 5 6 How to position the radome cover MODEL 821 7 Tighten the fixing bolts for the radome 8 The cable run must...

Page 44: ...utline drawing at the back of the manual four 12mm holes for fixing and one 27 mm hole for cable entry and one 20mm hole for the vent tube There is a cable entry cable gland out side the antenna unit...

Page 45: ...n the antenna unit and the display unit 2 Pass the signal cable through the hole Then seal the hole with sealing com pound for waterproofing 3 Unfasten the cable clamping plate by loosening four M4 sc...

Page 46: ...o position the radome cover MODEL 841 9 Tighten the fixing bolts for the radome 10 The cable run must be properly sup ported and must not be used to provide impromptu foot holds or hand holds Clips or...

Page 47: ...e 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...

Page 48: ...10 0 39 238 9 37 18 0 71 18 0 71 80 3 15 80 3 15 100 3 94 20 0 79 274 10 79 130 5 12 4 6 FIXING HOLES SERVICING CLEARANCE 10mm 222 8 7 236 9 3 Cutting size for flushmount Figure 5 13 How to mount the...

Page 49: ...ASS FURUNO ELECTRIC CO LTD 10 2 31 2VDC 3 GND 1 2 Signal cable connector Connect signal cable from antenna here NMEA connector Connect navaid nere HDG connector Connect heading sensor nere Covered not...

Page 50: ...on If your navigation aid can output data in NMEA 0183 data format your vessel s po sition in latitude and longitude the range and bearing to waypoint speed and course may be input to this radar and b...

Page 51: ...received at the radar and external equipment 5 3 Installation Check List After completing the installation it is a good idea to check for proper installation Follow the checklist below and tick boxes...

Page 52: ...ct a long range 4 Press the ECHO key The following display appears AUTO 1 2 3 MAN AUTO 1 2 3 MAN GAIN STC A C RAIN 00 FTC 0 1 2 12 ECHO KEY TO EXIT Current level Item selected for adjustment Figure 5...

Page 53: ...MAGnetic compass or GYROcompass 5 Press the ENT key Leave the menu open to complete the next several adjustments 5 7 Relative Bearing Alignment You have mounted the antenna unit facing straight ahead...

Page 54: ...bject 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 pic ture center The range of objects will also be inco...

Page 55: ...ubber cover DJ Connector Boot band Cable Display unit DJ 1 2 Cover the connector with the rubber cover The projection on the connector base is inserted into the groove on the rubber cover Display unit...

Page 56: ......

Page 57: ......

Page 58: ......

Page 59: ......

Page 60: ......

Page 61: ......

Page 62: ......

Page 63: ......

Page 64: ......

Search results

Summary of Contents for 821 Operators

Reviews:

Related manuals for 821 Operators

Brands by name

Popular brands

Furuno 821 Operators, Operator'S Manual

Search results

Summary of Contents for 821 Operators

Reviews:

Related manuals for 821 Operators

Brands by name

Popular brands