Eagle FISHMARK 640C Installation And Operation Instructions Manual Download

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Pub. 988-0143-861

www.eaglesonar.com

Fish-Finding & Depth-Sounding Sonars

Installation and Operation

Instructions

Summary of Contents for FISHMARK 640C

Page 1: ...Pub 988 0143 861 www eaglesonar com Fish Finding Depth Sounding Sonars Installation and Operation Instructions ...

Page 2: ...lectronics may find it necessary to change or end our policies regulations and special offers at any time We reserve the right to do so without notice All features and specifications subject to change without notice All screens in this manual are simulated On the cover SeaFinder 640c DF shown Other models covered in the manual are similar For free owner s manuals and the most current information o...

Page 3: ... 9 How low should you go 10 Shoot Thru Hull vs Transom Mounting 11 Transom Transducer Assembly and Mounting 12 Trolling Motor Bracket Installation single frequency only 19 Transducer Orientation and Fish Arches 20 Shoot Thru Hull Preparation 21 Testing Determines Best Location 22 Shoot Thru Hull Installation 24 Speed Temperature Sensors 26 Optional Speed Sensor Installation 27 Power Connections 29...

Page 4: ...ontrast Level 58 Calibrate Speed 59 Chart Speed 60 ColorLine 61 Depth Cursor 62 Depth Range Automatic 63 Depth Range Manual 64 FasTrack 65 Fish I D Fish Symbols Depths 65 To turn the Fish I D feature on 67 FishTrack 67 To turn on FishTrack 67 Frequency Change Transducer Frequency SeaFinder only 68 To change the frequency setting to 50 kHz 69 To change the frequency setting to 200 kHz 69 HyperScrol...

Page 5: ...ull Sonar Chart 81 Split Zoom Sonar Chart 82 Digital Data Chart 83 Sonar Simulator 85 Stop Chart 86 Surface Clarity 87 To adjust the Surface Clarity level 87 Transparency 88 To adjust Menu Transparency level 89 Units of Measure 89 Zoom Zoom Bar 90 Zoom Pan 91 Section 5 Troubleshooting 92 Unit won t turn on 93 Unit operates only in demo mode 93 Unit freezes locks up or operates erratically 93 Weak ...

Page 6: ...iv Notes ...

Page 7: ...time reading the manual So we designed our book so that you don t have to read the whole thing from front to back for the information you want At the start or end of each segment we ll tell you what content is coming up next If it s a concept you re already familiar with we ll show you how and where to skip ahead for the next important topic We ve also made it easy to look up any tips you may need...

Page 8: ...mental Material including a list of warranty and customer service information Now if you re into the fine details glance over the next segment on speci fications to see just how much sonar power your unit contains It s impor tant to us and our power users but if you don t care how many watts of power the unit has skip ahead to important information on how sonar works on page 4 Capabilities and Spe...

Page 9: ...ne angle Transducers operate at speeds up to 70 mph 61 kts Watts SeaFinder 640c DF 4 000 watts peak to peak 500 watts RMS FishMark 640c 1 500 watts peak to peak 100 watts RMS Sonar sounding Depth capability SeaFinder 640c DF 1 500 feet 457 me ters FishMark 640c 800 feet 244 meters Actual capability depends on transducer con figuration and installation bottom composi tion and water conditions All s...

Page 10: ...in the under water basics Sonar is an abbreviation for SOund NAvigation and Ranging a tech nology developed during World War II for tracking enemy submarines A sonar consists of a transmitter transducer receiver and display In simple terms here s how it finds the bottom and the fish The transmitter emits an electrical impulse which the transducer con verts into a sound wave and sends into the wate...

Page 11: ...e down arrow key the up arrow the left arrow and the right arrow Keyboard The other keys perform a variety of functions When the text refers to a key to press the key is shown in bold sans serif type For example the Enter Icons key is shown as ENT and the Menu key is shown as MENU Menu Commands A menu command or a menu option will appear in small capital letters in a bold sans serif type like this...

Page 12: ...e Sonar Page Press the Menu key then repeatedly press or press and hold the down arrow key to scroll down the menu and select highlight the Sonar Features menu command Then press the Enter key Step 2 would mean Press the right arrow key for dual frequency units or press the right arrow key followed by the down arrow key for single frequency units to select highlight the Fish ID symbols com mand Ne...

Page 13: ...ther power connection along with the power cable route 4 Install the transducer and route the transducer cable to the sonar unit 5 Route the power cable from the unit s location to an appropriate power source and connect it there 6 Connect the transducer power cable to the unit and mount the sonar unit on the bracket Transducer Installation These instructions will help you install your Skimmer tra...

Page 14: ... mm drill bit to accommodate all the cables NOTE The following installation types also call for these recommended tools and required supplies that you must provide supplies listed here are not included Single frequency transom installations Tools two adjustable wrenches drill 29 0 136 drill bit flat head screwdriver Supplies none Dual frequency transom installations Tools two adjustable wrenches d...

Page 15: ...boats typically have large outboard motors capable of propelling the boat at speeds faster than 35 mph Typically a good transom location on aluminum boats is between the ribs closest to the engine 3 The transducer should be installed with its face pointing straight down if possible For shoot thru applications Many popular fishing boat hulls have a flat keel pad that offers a good mounting surface ...

Page 16: ...terline is level with the bottom of the boat hull This will usually give you the best combination of smooth water flow and protec tion from bangs and bumps Align transducer centerline with hull bottom A dual frequency trans ducer is shown at left and a single frequency transducer at right CAUTION Clamp the trans ducer cable to transom near the transducer This will help prevent the transducer from ...

Page 17: ...ucer is bonded to the inside of the hull with epoxy The sonar ping signal actually passes through the hull and into the water This differs from a bolt thru hull installa tion often called thru hull In that case a hole is cut in the hull and a specially designed transducer is mounted through the hull with a threaded shaft and nut This puts the transducer in direct contact with the water Typically s...

Page 18: ...of the parts first place the transducer s bracket against the transom and see if you can move the transducer so that it s parallel with the ground The following instructions sometimes vary depending on the mounting bracket that came with your transducer Single frequency Skimmers come with a one piece stainless steel bracket while dual frequency Skimmers come with a two piece plastic mounting brack...

Page 19: ...ers molded into each ratchet Place the ratchets into the bracket with the letter A aligned with the align ment mark molded into the bracket Place the ratchets onto the trans ducer with the letter A aligned with the 12 o clock position on the transducer stem These positions set the transducer s coarse angle ad justment for a 14 transom Most outboard and stern drive transoms have a 14 angle Insert a...

Page 20: ...ct for your hull If the transducer s face isn t parallel with the ground remove the transducer and ratchets from the bracket Place the ratchets into the holes in the bracket with the letter B aligned with the dot stamped in the bracket Reassemble the transducer and bracket and place them against the transom Again check to see if you can move the transducer so it s par allel with the ground If you ...

Page 21: ...ons are correct for your hull If the transducer s face isn t parallel with the ground remove and disassemble the transducer and ratchets Place the ratchets into the bracket holes with the letter B aligned with the bracket alignment mark Place them on the transducer aligned with the 12 o clock posi tion on the transducer stem Reassemble the transducer and bracket and place them against the transom ...

Page 22: ...etermine the correct position for the ratchets assemble the transducer as shown in the figure in step 2B Don t tighten the lock nut at this time 4 Drilling mounting holes Hold the transducer and bracket assembly against the transom The transducer should be roughly parallel to the ground The trans ducer s centerline should be in line with the bottom of the hull Don t let the bracket extend below th...

Page 23: ...and re assemble it with the cable passing through the bracket over the bolt as shown in the following figures For single frequency Skimmer route cable over bolt and through bracket Side view shown at left and seen from above at right Both bracket types Attach the transducer to the transom Slide the transducer up or down until it s aligned properly with the bottom of the hull as shown in the preced...

Page 24: ...route the transducer cable away from other wiring on the boat Electrical noise from the engine s wiring bilge pumps VHF radio wires and cables and aerators can be picked up by the sonar Use caution when routing the transducer cable around these wires WARNING Clamp the transducer cable to the transom close to the transducer This can prevent the transducer from enter ing the boat if it is knocked of...

Page 25: ...ach the optional TMB S bracket to the transducer as shown in the following figure using the hardware supplied with the transducer Note The internal tooth washer is supplied with the TMB S Attach motor mounting bracket to transducer 2 Slide the adjustable strap supplied with the TMB S through the slot in the transducer bracket and wrap it around the trolling motor Posi tion the transducer to aim st...

Page 26: ...es on your display it could be because the transducer is not parallel with the ground when the boat is at rest in the water or at slow trolling speeds Transducer angles and their effects on fish arches Transducer aimed too far back Transducer aimed too far forward Proper transducer angle Partial fish arches Full fish arch ...

Page 27: ...does not have air bubbles in the resin or separated fiberglass lay ers The sonar signal must pass through solid fiberglass A successful transducer installation can be made on hulls with flotation materials such as plywood balsa wood or foam between layers of fiberglass if the material is removed from the chosen area See the figure below WARNING Do not remove any material from your inner hull unles...

Page 28: ... thru transducer should be installed as close to the transom as possible close to the centerline This will give you the best performance during high speed maneuvers Shoot thru hull transducer locations for high speed or trolling speed operation To choose the proper location for shoot thru hull mounting follow these testing procedures You may need a helper to complete these steps 1 Anchor the boat ...

Page 29: ...inten sity will likely decrease 3 Now move the transducer around to find the best location with the strongest possible bottom signal If you find a spot with an acceptable bottom signal mark the location and move on to step 4 If you can t get an acceptable bottom signal try turning up the sensitivity by three or five keystrokes and then move the transducer around once more If you find a spot that w...

Page 30: ... and proceed with the installation Shoot Thru Hull Installation If you are installing the transducer on a hull with floatation material sandwiched within the hull refer to the text Hulls With Flotation Ma terials beginning on page 22 1 Make sure the area is clean dry and free of oil or grease then sand both the inside surface of the hull and the face of the transducer with 100 grit sandpaper The s...

Page 31: ...hly stir the two compounds together until the mixture has a uniform color and consistency Do not mix too fast or bubbles will form in the epoxy After mixing you have 20 minutes to complete the in stallation before the epoxy becomes unworkable Spread a thin layer of epoxy about 1 16 or 1 5 mm thick on the face of the transducer as shown in the previous figure Make sure there are no air pockets in t...

Page 32: ...tor the temperature of surface water a live well or some other location These units can also accept an optional speed sensor for showing speed and distance traveled However you can only use one ac cessory at a time If you would like to use a speed sensor and a second temperature sensor at the same time you will need a combination device NOTE This unit is packed with a transducer containing a built...

Page 33: ...he SeaFinder 640c DF comes packed with a speed sensor If you wish to purchase an optional additional sensor for your unit refer to the accessory ordering information inside the back cover of this man ual The following instructions describe how to install the speed sensor Power trans Speed sensor or combo speed temp sensor Sonar unit rear view Temp sensor Temp sensor built into transducer Power tra...

Page 34: ...t one foot to the side of the transom s centerline Once you ve determined the proper location for the unit place the sen sor on the transom The bottom of the bracket should be flush with the hull s bottom Using the sensor as a template mark the hull for the screws pilot holes Drill four 1 8 holes one in each end of the slots Mount the sensor to the hull using 8 stainless steel wood screws not incl...

Page 35: ... or below waterline seal ant used for the screws The sensor is now ready for use Connect the sensor to the accessory socket on the back of your unit If you have any questions concerning the installation of the sensor please contact your local boat dealer Power Connections The unit works from a 12 volt battery system For the best results at tach the power cable directly to the battery You can attac...

Page 36: ... This will let you shut off power to the power cable when the unit is not in use When you are not using the unit you should always shut off power to the power cable es pecially when the power cable is disconnected from the unit If possible keep the power cable away from other boat wiring espe cially the engine s wires This will provide the best isolation from elec trical noise If the cable is not ...

Page 37: ...is unit has reverse polarity protection No damage will occur if the power wires are reversed However the unit will not work until the wires are attached correctly Mounting the Unit Bracket In Dash or Portable You can install the sonar unit on the top of a dash with the supplied gimbal bracket It can also be installed in the dash or mounted on a portable power supply If you use the supplied bracket...

Page 38: ...e toward the front of your unit Drill a 1 inch 25 4 mm hole in the dash for the power and transducer cables The best location for this hole is immediately under the gimbal bracket location This way the bracket can be installed so that it covers the hole holds the cables in position and results in a neat installation Some customers prefer to mount the bracket to the side of the cable hole It s just...

Page 39: ...nit when mounted on gimbal bracket Before positioning the bracket be sure to hold the cables against the rear edge of the hole Then slide the bracket over the hole and butt the rear of the bracket base firmly against the cables thus pinning them in place against the side of the hole Finally fasten the bracket to the dash Attach the unit to the gimbal bracket using the supplied gimbal knobs and was...

Page 40: ...t instructions is available for free download from our web site www eaglesonar com Portable Installation Like many Eagle products this sonar unit is capable of portable opera tion by using an optional portable power pack The power pack and an optional portable transducer expand the uses of your sonar unit The power pack makes it easy to use the unit on your boat or take it to the dock on a float t...

Page 41: ...r pack can be used with eight D cell alkaline bat teries or an optional sealed rechargeable battery For set up directions refer to the pack s instruction sheet Install batteries in power pack battery adapter D cell battery ...

Page 42: ...36 Notes ...

Page 43: ...s and utilities Material in Sec 4 is arranged in alphabetical order Before you turn the sonar unit on it s a good idea to learn about the dif ferent keys the Main Menu the four Page screens and how they all work together BUT if you just can t wait to get on the water turn to the one page Quick Reference on page 45 Keyboard The SeaFinder 640c DF sonar unit showing full sonar chart screen display an...

Page 44: ... or execute menu commands 6 EXIT The Exit key lets you return to the previous screen clear data or clear a menu 7 ALARM The Alarm key is a shortcut to access the various sonar alarms Press this key once to open the Alarms menu 8 ZOUT Zoom Out This key lets you zoom the screen out This key allows you to see the entire water column from surface to bottom 9 ZIN Zoom In This key lets you zoom the scre...

Page 45: ...is sonar unit will work fine right out of the box with the factory default settings But if you want to learn about the various sonar options see Sec 4 Sonar Options Other Features You can access the Main Menu from any of the four Page screens by pressing MENU MENU To clear the menu screen and return to the page display press EXIT Remember our text style for MENU MENU means press the Menu key twice...

Page 46: ...the transducer Calibrate Water Speed command calibrates the speed measurement Reset Water Distance command resets the log of distance traveled back to zero Transducer Type command sets the type of transducer connected to the unit Sonar Simulator command scrolls simulated data on the sonar chart Reset Options command resets all options to factory default settings Popup Help command turns popup help...

Page 47: ...neath the boat The chart moves across the screen displaying sonar signal echoes that represent fish structure and the bottom The Pages Menu allows you to switch between three chart display op tions Full Sonar Chart Split Zoom Sonar Chart and Digital Data To choose between the three chart display options use or to highlight the desired option then press EXIT ...

Page 48: ...42 Sonar page in Split Zoom Sonar Chart display mode Sonar page in Digital Data display mode ...

Page 49: ...displays its pictures and other data in many ways Your unit also includes several special sonar features and options that can help you better interpret the underwater scene These features and options are explained in Sec 4 but to show you how easy this unit is to operate the following page contains a simplified 10 step quick reference that will cover most fish finding situations The quick referenc...

Page 50: ...44 Sonar Page showing full sonar chart mode Surface clutter Bottom signal Fish arches In FasTrack fish arches show as horizontal bars Depth scale Digital data overlay depth temperature Surface signal ...

Page 51: ...rt readability Press MENU ENT and the Sensitivity Menu will appear on the left of your screen Use and to change the setting Boosting sensitivity will show more information on your screen which may cause clutter Reducing sensitivity will filter out some information but could omit important images We recommend adjusting sensitivity until the background is lightly peppered that is scattered dots ap p...

Page 52: ...k reference basic operation of this fish finder is pretty easy right out of the box If you are a sonar novice try operating the unit with the factory defaults until you get a feel for how it s working As you are learning the basics there is one setting you might want to tinker with from time to time Sensitivity Sensitivity controls the unit s ability to pick up echoes If you want to see more detai...

Page 53: ...al of full auto mode Fig 2 Sensitivity set at 75 percent Fig 3 Sen sitivity set at 50 percent Fig 4 Sensitivity set at 100 percent You can change the sensitivity level whether you are in Auto Sensitivity mode or Manual Sensitivity mode The adjustment method works the same in both modes but it gives you slightly different results Fig 1 Fig 2 Fig 3 Fig 4 ...

Page 54: ...d make minor adjust ments to the sensitivity level with a bias toward the setting you se lected Adjusting sensitivity in Manual Sensitivity Mode is similar to driving a car without cruise control you have complete manual control of the car s speed In the unit manual mode allows you to set sensitivity at 100 percent maximum or zero percent minimum Depending on water conditions the bottom signal may...

Page 55: ...et at the desired level press EXIT Important Tip While you are experimenting and learning it s possible to scramble the settings so that the sonar picture disappears from your screen If that happens remember that it s easy to switch back to full auto matic operation by restoring the factory auto settings Here s how To Restore Factory Settings 1 Press MENU MENU to RESET OPTIONS ENT 2 The unit asks ...

Page 56: ...h alarm When that lunker swims under your boat you ll hear it Fish I D can also be useful when you want to screen out some of the sonar detail gathered by your unit For example in one case a fisher man in San Francisco Bay saw clouds of clutter in the water but no fish arches When a down rigger was pulled up it brought up several small jellyfish The fisherman switched the sonar to Fish I D which s...

Page 57: ...operations without burning boat fuel Eagle is one of the first sonar manufacturers to provide this type of training tool for customers The emulator software simulates the actual sonar unit on your home computer You can run it from your computer keyboard or use your mouse to press the virtual keys Easy download and installation in structions are available on our web site ...

Page 58: ...52 Notes ...

Page 59: ... electrical and mechanical sources such as bilge pumps engine ignition systems and wiring air bubbles passing over the face of the transducer even vibration from the engine In all cases noise can produce unwanted marks on the display The ASP feature has four settings Off Low Medium and High If you have high noise levels try using the High ASP setting However if you are having trouble with noise we...

Page 60: ... 3 Press or to select a setting then press ENT 4 To return to the previous page press EXIT EXIT Alarms This unit has three different types of sonar alarms The first is the Fish Alarm It sounds when the Fish I D feature determines that an echo is a fish Another alarm is the Zone Alarm which consists of a bar on the side of the screen Any echo on the chart that appears inside this bar triggers this ...

Page 61: ...rks just the opposite It sounds a warning tone if the bottom depth goes deeper than the alarm s setting Both depth alarms work off the digital bottom depth signals No other targets will trip these alarms These alarms can be used at the same time or individually Main Menu left with Sonar Alarms highlighted The Sonar Alarms menu is shown at right To adjust and turn on the Shallow Alarm 1 Press ALARM...

Page 62: ... the alarm off press ALARM to Deep Alarm ENABLED ENT EXIT To switch to a different depth setting open the Sonar Alarms menu and repeat the instructions in step 3 above Zone Alarm The zone alarm is triggered when any echo passes inside the zone alarm bar shown on the right side of the screen To adjust and turn on the Zone Alarm 1 Press ALARM to Zone Alarm ENABLED to ADJUST ZONE ENT 2 To set the upp...

Page 63: ...he zone alarm 5 To turn the alarm off press ALARM to Zone Alarm ENABLED ENT EXIT To switch to a different depth setting open the Sonar Alarms menu and repeat the instructions in steps 3 and 4 above Fish Alarm Use the fish alarm to receive an audible alarm when fish or other sus pended objects are detected by the Fish I D feature Fish I D must be turned on for the Fish Alarm to work A different ton...

Page 64: ... backlight level select SCREEN from the Main Menu From the Screen menu you can adjust the Contrast and Bright ness levels by using the slide bars The backlight level can also be con trolled by using the PWR key Pressing the PWR key will scroll the unit through three different lighting levels From the Screen menu you can also select DISPLAY MODE See the follow ing image In Display Mode you can adju...

Page 65: ...r is reading 5 percent slower than true speed you will enter 5 in the window When you make a run to compare your ground speed to speed sensor speed perform your test in relatively calm water free of current if pos sible Unless of course you are taking the current speed into consid eration when making your calculation After you have a correction fig ure here s how to enter it 1 Press MENU MENU to C...

Page 66: ...ng or fishing from a dock experiment with a chart speed around 50 percent If you are drifting slowly try a chart speed around 75 percent When you are stationary and a fish swims through the sonar signal cone the image appears on the screen as a long line instead of a fish arch Reducing the chart speed may result in a shorter line that more closely resembles a regular fish return Sonar Page menu le...

Page 67: ...w Since fish are among the weakest echoes they show up mostly as blue arches A hard bottom or other relatively hard target returns a strong signal which causes a wider brightly col ored line reddish yellow to bright yellow If you have two signals of equal size one with red to yellow color and the other without then the target with brighter color yellow is the stronger signal This helps distinguish...

Page 68: ...lorLine left indicates a soft bottom probably sand or mud The wider ColorLine right indicates a harder rocky bottom Depth Cursor The depth cursor consists of a horizontal line with a digital depth box on the right side The numbers inside the box show the depth of the cursor Wider ColorLine Thin or no ColorLine ...

Page 69: ...ursor appears Press to lower the cursor line press to raise the cursor line 3 To clear the depth cursor press EXIT Depth Range Automatic When turned on for the first time the bottom signal is automatically placed in the lower half of the screen This is called Auto Ranging and is part of the units automatic function However depending upon the bottom depth and the current range you can change the ra...

Page 70: ...lete control over the range when the unit is in the man ual mode There are 16 depth ranges from 5 feet to 4 000 feet To switch to Manual Depth Range 1 First turn off automatic depth range From the Sonar Page press MENU to AUTO DEPTH RANGE ENT 2 Press to DEPTH RANGE ENT and the Depth Range control scale appears 3 Press or to select a different depth range A horizontal black bar highlights the selec...

Page 71: ...g drawn out lines on a normal chart display FasTrack con verts the graph to a vertical bar graph that with practice makes a use ful addition to fishing at a stationary location Sonar Page showing FasTrack Fish I D Fish Symbols Depths The Fish I D feature identifies targets that meet certain conditions as fish The microcomputer analyzes all echoes and eliminates surface clutter thermoclines and oth...

Page 72: ...y there are no fish The reverse is also true The illustrations on the next page show how Fish I D can be turned on Does that mean Fish I D is broken No the feature is interpreting sonar returns in a specific way to help take some of the work out of reading the screen Remember Fish I D is one of the many tools we provide so you can analyze your sonar returns for maximum fish finding information Thi...

Page 73: ...s feature is available only when the Fish I D feature is on The default setting for FishTrack is off To turn on FishTrack Note These instructions will turn on FishTrack and Fish I D at the same time 1 From the Sonar Page press MENU to SONAR FEATURES ENT 2 Press to FISH DEPTHS ENT EXIT EXIT To turn off FishTrack repeat the instructions in step 1 Turning off FishTrack in this manner will not turn of...

Page 74: ...deeper the 50 kHz frequency is the best choice The 200 kHz transducer will give you better detail and definition but less depth penetration The 50 kHz transducer will give you greater depth penetration but a little less detail and less definition Remem ber all sonar units typically read deeper in fresh water than in salt wa ter There is a common exception to these rules of thumb Some fishermen on ...

Page 75: ...e press MENU to SONAR FEATURES ENT 2 Press then to Transducer Freq 200 KHZ ENT 3 Press EXIT EXIT to clear the menu HyperScroll See the entry on Ping Speed which controls the HyperScroll feature Noise Rejection See the entry on Advanced Signal Processing in this section Overlay Data To change the digital data shown floating on top of the Sonar Page To select data for display 1 Press MENU to OVERLAY...

Page 76: ...ht In this example Depth will be displayed in a large font When selected the data type shifts to the top of the data list and a check mark appears beside the data type You can now use or to select other Data Types for display Data list showing Water Speed selected to display on Sonar Page ...

Page 77: ...ize 1 Press MENU to OVERLAY DATA ENT 2 Press or to select Data Type press or to Data Size EXIT The selected data type will be displayed in the new size To change the font size for another Data Type press ENT and repeat these steps be ginning with step two above 3 To return to the previous page press EXIT Tip If you wish you can change the displayed data font size when you select a data type 1 From...

Page 78: ...peed of 50 percent At normal boating speeds this auto matically provides enough return echoes to refresh the screen and scroll the chart at maximum chart speed However when you are running at high speeds or just want the fastest possible screen update you may want to use the HyperScroll feature When you change the Ping Speed to any setting greater than 50 per cent the unit automatically enters Hyp...

Page 79: ...n If this occurs just decrease the sensitivity to a level that eliminates the clutter When you turn HyperScroll off you can return to your original sensitivity level Sonar Menu left with Ping Speed command selected Ping Speed Control Bar right at default setting To change Ping Speed 1 From the Sonar Page press MENU to PING SPEED ENT 2 The Ping Speed Control Bar appears Press to increase ping speed...

Page 80: ...graph display doubles in width at the right side of the screen This allows you to better see the virtually instantaneous sonar returns just as you would on a flasher sonar unit For more informa tion on FasTrack see its entry in this section Pop up Help Help is available for virtually all of the menu labels on this unit By highlighting a menu item and leaving it highlighted for a few seconds a pop ...

Page 81: ... their original factory defaults This is useful when you have changed several settings and want to return the unit to basic automatic operation 1 Press MENU MENU to RESET OPTIONS ENT 2 Press to YES ENT 3 All the menus are cleared and the unit reverts to the full sonar chart just as if you had turned it on for the first time All options have been returned to the factory settings ...

Page 82: ...are cleared and the water distance is reset to 0 00 Set Keel Offset This unit measures water depth from the face of the transducer Since the transducer is installed below the water surface the distance dis played by the digital depth chart depth scale chart cursor or fish sym bols is not the exact water depth If the transducer is 1 foot below the surface and the screen shows the water depth as 30 ...

Page 83: ...ign to a minus sign 3 Press to the first number then press to change the number to 3 4 Press to the second number then press to change the number to 5 then press EXIT The depth indicators now accurately show the depth of water beneath the keel NOTE If knowing the exact depth of water beneath the keel is less important you can calibrate the depth indicators so that they show the actual wa ter depth...

Page 84: ...itions When the unit is in the auto matic mode sensitivity is automatically adjusted to keep a solid bottom signal displayed plus a little more power This gives it the capability to show fish and other detail Situations will occur when you will want to increase or decrease the sensitivity If you want to see more detail an increase in sensitivity will be necessary Wave action and boat wakes can cre...

Page 85: ...hen you reach the maximum or minimum limit a tone sounds Sonar Menu left with Sensitivity command selected The Sensitivity control bar is shown at right To adjust sensitivity in manual mode 1 Turn off Auto Sensitivity From the Sonar Page press MENU to AUTO SENSITIVITY ENT 2 Press to SENSITIVITY ENT and the Sensitivity control bar appears Press or to pick a different sensitivity setting When it s s...

Page 86: ...appear in the language you selected Software Version Information From time to time Lowrance updates the operating system software in some of its products These software upgrades are usually offered to customers as free downloads from our web site www lowrance com The upgrades make the unit perform better or introduce a new feature or function You can find out what software version is running in yo...

Page 87: ... Menu showing sonar chart display options Full Sonar Chart This is the default mode used when the unit is turned on for the first time or when it s reset to the factory defaults The bottom signal scrolls across the screen from right to left Depth scales on the right side of the screen aid in determining the depth of targets The line at the top of the screen represents the surface The bottom depth ...

Page 88: ...in use See the Zoom section for more information This image of the Full Sonar Chart shows the Overlay Data depth and water temperature readings set at different text sizes Split Zoom Sonar Chart A split chart shows the underwater world from the surface to the bot tom on the right side of the screen The left side shows an enlarged ver sion of the right side The zoom range shows at the bottom left c...

Page 89: ...een win dow zoomed to 4X Digital Data Chart This mode shows the chart on the right side of the screen The left side has five large digital data boxes or windows containing by default Water Depth Water Temperature Water Speed from an optional speed sensor and Water Distance distance traveled or log it also re quires a speed sensor ...

Page 90: ...t screen can be customized to show digital data different from the defaults first shown To customize this screen 1 From the Sonar Page in Digital Data mode press MENU to CUSTOMIZE ENT The Sonar Menu left showing the Customize command highlighted The Water Speed box is selected at right ...

Page 91: ...ssing ENT use the key to select another box to change When the selected box title bar flashes press ENT or to select data type ENT Repeat these steps until you are finished customiz ing then press EXIT to return to the Sonar Page Sonar Simulator This unit has a built in simulator that lets you run it as if you were on the water All sonar features and functions are useable When in simulator mode th...

Page 92: ... simulator the demo mode is for demonstration only and will auto matically stop as soon as you turn the unit on with a transducer at tached The simulator will continue to function normally Stop Chart There may be a time when you want to turn off the sonar This com mand turns off the sonar and stops the chart from scrolling Sonar re starts automatically each time you turn the unit back on Press MEN...

Page 93: ...wakes temperature inversion and more The surface clarity control reduces or eliminates surface clutter signals from the display It does this by changing the sensitivity of the receiver decreasing it near the surface and gradually increasing it as the depth increases There are three levels of surface clarity available low medium or high It can also be turned off The default level is off To adjust t...

Page 94: ... right view shows Surface Clarity set at High Transparency Use the transparency menu to adjust the transparency of menu win dows A high transparency allows you to continue monitoring the sonar chart while adjusting feature settings though the text of the menus may fade until it is unreadable A low transparency will usually make menu text easier to read at the cost of watching your sonar returns Su...

Page 95: ...o TRANSPARENCY ENT The TRANSPARENCY slider bar appears Press or to move the bar The lower end of the scale makes the menus opaque the upper end is maximum transparency Units of Measure This menu sets the speed and distance statute or nautical miles me ters depth feet fathoms or meters and temperature degrees Fahr enheit or Celsius To change the units Press MENU MENU to UNITS OF MEASURE ENT ...

Page 96: ... If you want to turn off all sounds set the volume to zero To adjust volume 1 Press MENU MENU to SOUNDS ENT 2 The volume control bar appears Use the volume slider to increase or decrease the volume level When it s set at the desired level press EXIT Zoom Bar Zooming the display is a common fast and easy method used to en large small detail fish signals and the bottom with its associated struc ture...

Page 97: ...t Zoom Pan The unit has the ability to quickly zoom in on any portion of the water column with just the touch of an arrow key The Zoom Pan feature lets you rapidly move the zoomed area up and down to different depths By pointing your zoom at different portions of the chart as it scrolls you can get a good close up view at structure or cover below you To use Zoom Pan switch to a manual depth Range ...

Page 98: ...92 Notes ...

Page 99: ...volts If it isn t the wiring to the unit is defective the battery terminals or wiring on the terminals are corroded or the bat tery needs charging Unit operates only in demo mode 1 The transducer has not yet been connected or has been disconnected To leave demo mode make sure the transducer is securely connected before turning the unit on Unit freezes locks up or operates erratically 1 Electrical ...

Page 100: ...nate weaker signals such as fish or even structure from the display 3 The water may be deeper than the sonar s ability to find the bottom If the sonar can t find the bottom signal while it s in the automatic mode the digital sonar display will flash continuously It may change the range to limits far greater than the water you are in If this happens place the unit in the manual mode then change the...

Page 101: ...ish arches when zoomed in on a small range of water than a large one For example you will have much better luck seeing fish arches with a 30 to 60 foot range than a 0 to 60 foot range This enlarges the targets allowing the dis play to show much more detail 4 The boat must be moving at a slow trolling speed to see fish arches If the boat is motionless fish stay in the cone showing on the screen as ...

Page 102: ...rom electrical equipment then make certain everything except the sonar unit is turned off then start the engine Increase the RPM with the gearshift in neutral If noise ap pears on the display the problem could be one of three things spark plugs alternator or tachometer wiring Try using resistor spark plugs alternator filters or routing the sonar unit s power cable away from en gine wiring Again ro...

Page 103: ...nable protection against harmful interference in a residential installation This equipment generates uses and can radi ate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communi cations However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful int...

Page 104: ...98 Notes ...

Page 105: ... OR REPLACEMENT OR REFUND AS JUST DESCRIBED IS THE EXCLUSIVE REMEDY AVAILABLE TO YOU AGAINST US FOR ANY DEFECT MALFUNCTION OR NON CONFORMITY CONCERNING THE PRODUCT OR FOR ANY LOSS OR DAMAGE RESULTING FROM ANY OTHER CAUSE WHATSOEVER WE WILL NOT UNDER ANY CIRCUMSTANCES BE LIABLE TO ANYONE FOR ANY SPECIAL CONSEQUENTIAL INCIDENTAL OR OTHER INDIRECT DAMAGE OF ANY KIND Some states do not allow the exclu...

Page 106: ...hange or end our shipping policies regulations and special offers at any time We reserve the right to do so without notice in Canada If you re in Canada and you have technical return or repair questions please contact the Factory Customer Service Department Before any product can be returned you must call customer service to determine if a return is necessary Many times customer service can resolv...

Page 107: ...r or replacement you must first receive a return authorization number from Customer Service Products shipped without a return authorization will not be accepted When shipping we recommend you do the following 1 Please do not ship the knobs or mounting bracket with your unit 2 If you are sending a check for repair please place your check in an envelope and tape it to the unit 3 For proper testing i...

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Eagle FISHMARK 640C, Installation And Operation Instructions Manual

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