Lowrance LRG-1500A Installation And Operation Manual Download | Manualshive

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Summary of Contents for LRG-1500A

Page 1: ...PERATION MANUAL MODELS LRG 1500A AND LRG 1500M TRULINE RECORDER LOWRANCE ELECTRONICS 12000 F SKELLY DR TULSA OKLA Printed in U S A 988 0088 02 L INC 74128 PDF compression OCR web optimization with CVISION s PdfCompressor ...

Page 2: ...stomer Service Department inTulsa OK Toll free1 800 331 3889 Please detailthe problem youare experiencing Our ServiceDepart mentmaybeableto saveyoutheinconvenienceof returning yourunit If itisdetermined that your unitmustbereturned fullshippinginstruc tions will be provided SCHEMATIC DIAGRAM AND PARTS LIST Should youdesire aSchematic Diagram and Parts listforyourLow ranceTRUELINE RECORDER send 1 0...

Page 3: ...ent Only Width 9V2 Height 71 2 Depth 51 4 METRIC Instrument Only cm Width 24 1 cm 24 Specifications 24 1SOOA Depth Ranges 0 60 feet Output Power Weight Dimension Whatltls How ItWorks 3 What It Tells You 4 Installation 6 Operation 7 Scale 7 i Sensitivity 7 Suppression 8 Paper Speed 8 Gray Linew 9 How To Read Graphs 10 PaperLoading 13 Stylus Replacement 19 Stylus Belt Replacement 20 Maintenance 22 D...

Page 4: ...evel depth range paperspeed andthedegree of gray line usedto enhance the recorded information The patented Lowrance Variablesuppression systemnotonly filtersoutfalsesignals withoutdistqrting the real ones but issynchronized Withthegraylinefunction to provide clearsignals underall conditions The permanent recordofwhatyoursonarhas seen isrolled and storedinside thecase 2 DO SECTION Do carry aspare f...

Page 5: ...lywith mild soapywatertoremove anyaccumulated roadgrime or oilyfilm Thisisessential to havegood contactbetween thetransducer and thewater Periodically the rubber roller on the paperdriveshouldbecleaned witha clothdampenedwithalcohol toimprovethefrictiononthe driveshaft See page 16 Figure 29 HOW IT WORKS When the unit is turned on an electronically regulated motor drives a lightweight beltlocated a...

Page 6: ... B represents an echo asecond signal caused fromaveryhard or reflective bottomsurface whichcausesthesonarsignal tobounce backtothewater s surface return tothebottomand reflect backtothereceiver Therefore the timefor a sonar signal to traveltothe bottomand backtothe surfaOehas doubled IfthetruebottomreadingislOfeet theechowill appear at32feet Ifthetrue depth weretenfeet then theechowould occur20fee...

Page 7: ...n assembly Refer to Figure4on page 3 Move thefrontofthebelt DOWN to position the stylusat the centerof the platen I E A ALGAEAND PLANKTON B TRUE BOTTOM SIGNAL C SECOND ECHO The LRG 1500A M is a completesonar Itscontrols are simple enough for theoccasional fisherman andflexible enoughto satisfythe most demand ingpro Weencourage youto studytheremainder ofthis booklet to getthe mostfromyourinvestment...

Page 8: ... unitisattachedtothecenterconductor ofthepowercableasclose tothepowersourceaspossible Thiswillprotectboththeunitandthepower cableincaseeitheris evershorted A connectoris suppliedto attach the fuseto the powercable Thepositiveconducter inthepower cableisthecenterconductor Theunitis protected from accidental polarity reversals and no damagewill result if batteryconnections are wrong However the unit...

Page 9: ...will have to be higher When high Sensitivity settings are used asecond bottomechowillappear Thisisnormal andiscaused bythereturning signal reflecting offthesurface ofthewater making a second trip to the bottom and back When detailed information about brush piles individual fish orthethermo dineisdesired theSensitivity knobshouldbe setatabout 3 4point Refer tothe illustration below to seewhateffect...

Page 10: ...See page 12 Figure22 Therefore the owerthe suppression setting thebetter Advance the knob sellingonlyasfar asneccessary to remove theerratic unwanted noise marks Most of the time at low or trolling speeds no suppression will be needed PAPER SPEED KNOB Controlsthe speed ofthechartpaper Forgood detailwhentrollingand lookingforfish orwhenrunningathighspeed turn the paperspeed knob up at least half wa...

Page 11: ...0scale indeep water the paperspeed should be turned down to no morethan half way for the bestrecord If gaps appear betweenstylusstrikes the paperis running toofast Thepaperspeed may also be turned down to conserve paperwhen not lookingforfish or con cernedwithfine detail s i GRAY LINE ON OFF KNOB The Gray Linefunction can be used to outline the bottom contour whichmight otherwise be hidden beneath...

Page 12: ...movementbetween the fish and boat to develop the arched mark Fig 17 THERMOCLINES The temperature of water in the lake is seldom constant fromtopto bottom Layersofdifferenttemperatures form andthe junctionofawarmandcool layerofwateriscalled athermocline Thedepth and thickness ofthethermocline canvarywiththe season ortimeofday In deep lakestheremaybetwoormore atdifferentdepths Thermoclines are impor...

Page 13: ...g 25 14 rrt1 7 t Fig 18 A JIGGINGA 1 oz HOPKINS SPOON INSUBMERGED THEE B FISH SIGNALS BOAT DRIFTING VERY SLOWLY OVER FISH C BAITFISH Fig 20 I rrv High Speed 46 MPH SUPPRESSION ON ADEQUATE SETTING SENSITIVITY ON 1 2 POSITION SCALE 0TO 60 FEET PAPER SPEED SLOW SUPPRESSION OFF DEPTHS RECORDED FROM 18 INCHES TO 71 2 FEET t 11 High Speed 46 M P H SUPPRESSION OFF SENSITIVITY ON 1 2 POSITION NOTE POOR RE...

Page 14: ...OAT FISH MOVED FROM 13 FEET TO 21 FEETTO 12 FEETWHILE DRIFTING SWIMMING WITHIN THECONE OF SOUND B JIGGING A LEAD HEADLURE OFFBOTrOM SCALE 0 TO 60FEET GRAY LINE ON V Fig 22 SUPPRESSION TOO HIGH NOTE THAT RECORDER SIGNALSFROM SCHOOLS OF BAITFISH ARE ELON GATED ANDRUNTOGETHER WITH THE BOnOM I SUPPRESSION PROPER SETTiNG NOTEDISTINCT INDIVIDUAL SCHOOLS OF BAIT FISH q _i END OF PAPER MARKER Thegraphpape...

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