Z-7200 LIQUID CRYSTAL GRAPH INSTALLATION AND OPERATION MANUAL LITHO IN U.S.A.
TABLE OF CONTENTS INTRODUCTION INSTALLATION POWER CONNECTIONS cal energyfromthetransrriitterinto ultrasonic soundwaves. When areturn echo strikes thetransducer, it converts the sound waves into electrical energywhich is received and displayed by the sonar unit. 1 1 TRANSDUCER KEYBOAJRD BASICS DISPLAYINTERPRETATION OPERATION 3 4 6 OFF AUTO 7 7 $ AUrOMA11CSENSFTIVIry SPEED RET RANGE LOWER LIMIT 10 11 . . UPPER/LOWER LIMIT-Thesearetherangelimitsdisplayedonthesonar screen or paper.
REMOTE - An intelligent "repeater" unitthat receives depth information from another sonar unit. Aremote doesn'thavea transmitter or receiver. However, It does have It's own features that are adjustable and operate separately from the master. RESOLUTION -The abilityofa sonar unitto separate targets from each other or thebottom. RMS A standard rating of transmitter power output. SCALE -Themarkings on a sonar unit'sdisplay. To determine the depth ofatarget,simplycompare thetarget'slocation.
of the bottom. In otherwords, youcantell If the bottom is softorhard. A Power Connections The Z-7200operates from a 12 volt battery system. Attach the cable to an accessory or power buss. If you have problems with power electrical interference, then attach the cabledirectlyto the battery. Electrical interference shows as random dots on the display whenever the boat's engine or an accessory is on. Thepower cablehastwowires, red is the positive leadand black is negative or ground.
GLOSSARY NOISE ANCHOR WATCH -Asetting ofthesonarunit'salarm.Thealarm activates when the boat drifts into shallower or deeper water than the alarm set points. Minimize electrical noise by routing the power cable away from otherpossible sourcesof electrical interference. Oneofthe largest noise generators is the engine's wiring harnessthat runsfromthe engine tothe instrument panel. Thisharness usually containsawireforthetachometer which radiates RF (radio frequency) energy.
KEYBOARD BASICS This sectiongives a brief explanation ofthekeyboard. Read the Operation sectionfor a detailed description of eachkey's operation. SPARE PARTS Thefollowingis alistofthe mostcommonlyneededparts. To order,simplywritethe listof parts required on a slip of paperand mail it to theabove address. (Note: Pricesubjectto change withoutnotice.) SENSITIVITY These keys control the graph's sensitivity. (rho digital automaticallyadjusts itssensitivity.
BAIT FISH The importance of bait fish to successful fishing can't be overemphasized. They are the principle food of all gamefish in mostwaters. KEYBOARD BASICS UGHT Press both sensitivitykeysat thesametlmetotum the lightsonor suchas minnowsand Baitfish aretheplanktonfeedlngforagefish, shad. Bait fish can also be the young of game fish, such as crappies, bluegill, and bass. Most bait fish concentrate within fIve feet of the surface where sunlightpromotes the growth of the plankton on which theyfeed.
DISPLAY INTERPRETATION Now let's look at the display. we'll turn ontheZ-7200by pressFirst, the ON ing key. Thelightswillflashfor sixseconds.The chartisnow scrolling the return echoes acrossthe screen and the digital is searching for the bottomdepth. It's flashing 0 because it hasn'tfound the bottomyet. Once it finds the bottom,the depth is displayed. Here the Z-7200 has found Thetemperature ofwaterin the lake is seldom constant from top to bottom.
OPERATION When the Z-7200 Is first turned on, It automaticallyfinds and displaysthebottom depth, and adjuststhesensitivity to theproperlevel. It also sets the scales to a range that will keep the bottom signal on the display, plus much more. Using the Z-7200 in this mode is simple and allowsyouto concentrate onfishing. However, virtuallyevery function of theunitis manually adjustable softcanbe "fine tuned" to the surrounding conditions. At first, takethis manualwith you as a reference guide.
If a partial arch occurs most of thetime on your unit (the mark curves up, but not backdown,or vice-versa) Itcould be the transducer is notpointingstraightdown.Adjustatransom mounted transducer until the fishshowthedistinctivearch. Thismaytakesome trial and erroruntil you achieve the correct mounting. SENSITIVITY When first tumed on, the Z-7200 is in the AUTO SEARCH mode. Themicro-computerautomatically adjuststhe sensitivity and range tofind and lock onto the bottom.
Brush usually lies on the bottom and shows up as clumpsrising above the bottom signal. Brush signals look similar to large rocks, however their signal is not as strongas rock. FISHSIGNALS The signals displayed on the Z-7200 by fish are Identified by variousshaped markings Incertain patterns,as opposedtorandommarks createdby noise. Orthesolid, continuous markings made bythebottom. a 2 di 4 Typically, fish are identified by acharacteristic archthat separates them from their stationary surroundings.
La I CHARTSPEED At power on, the chart speed scrolls at a pre-determined speed. For a higherspeed, press and holdtheFAST key in theCHART sectionof thekeyboard. When thescroll speed reachesthedesired speed, release theFASTkey. Toslowthedisplay,press and holdtheSLOW key. Pressing either of thesekeys causes the sensitivity bar at the top of the displayto changeto a dashed line. Theletters "CHT" will also appearin a window nearthetop ofthedisplay. The bar represents thechart speed.
TRANSDUCERS AND CONE ANGLES Thesoundwaves fromthetransducer spreadout intothewaterin aconeshaped beam. Thislooks muchlikethebeam fromaflashlight. The anglebetween the outside edges ofthecone is the coneangle. Eagle offers achoiceoftransducers with either an& or 20 degree coneangle. Thesewill interchangewith anyofthe 192 kHzsonarproducts. In otherwords,useanyEagle sonar instrumentwith anyEagletransducer ofthesamefrequencywith no loss of performance.
RANGE section. For example, Ifyou have a 30foot window, pressing the up arrow in theRANGE sectionwill change thewindowto20 feet. Press theuparrowagainandthezoomwindowwillchange to 10feet. ThisIsthe smallest zoomwindow. Thelargest zoom window is 300 feet. Ii:i —— r. - — 2..... AUTOMATIC BOTTOM TRACKING Thelowerlimit will change as thebottomdepth changes, iftheZ7200 Is inthe automatic mode. To zoom in onthe bottomand track it as its depth changes, followthestepsbelow.
MENU #11 - PULSE WIDTH _1 There isarelationship be— TC tween resolution and transmitter pulse width. Resolution, In this case, Is the ability of a sonar to 1: Ci.R separatetargets. The shorterthe PULSE 2 pulsewidth,the betterthesonar's t,tj 1 L abilityto separate targets. However, in deep water, the shorter I6 the pulse width, the less likely a return echo will be received. In —, SHflRT fact, the Z-7200 automatically increases the pulse width as the 6 range increases.
To get themaximum performance outof your digital sonar, stop the chart by pressing both arrowkeys at thesame time in the keyboard's chart section. ThisturnstheZ-7200 intoa digital sonar onlyand allowsit to bettertrackthe bottomsignal. Agood reason to usethedigital isifyou are going to travel at high speed and you just want to know the bottom depth. Stop the chart, then changetothelarge digital number size. This will give both the fastest possible depth updates plus an easy-to-read --—-. a.....
MENU #8- GRAYLINE SET PtH ) To adjusttheGRAYLINE level,press botharrowkeys inthe RANGEsectionatthe same time. Use the same arrow keys until menu #8 appears. Press the up arrow key in the ALARM section to turn GRAYUNE SET on. The menudisappears andtheZ-7200 returns you to the chart display. Theword "GRAY"appears in the upper left corner of the screen. This signifies that the sensitivity bar now shows the amount of GRAYLINEin use.
To change menus, usethearrow keys in the RANGE sectionon thekeyboard. To select an itemfrom the menu, usethearrowkeys Inthe ALARM section. Once you make a selection, press the AUTO key to activatethe selection. Or, switch to another menu to access another feature. Onceall ofthe selections are made, press the AUTO key and all selections on all menus will be activated. o aaN9IT/V1TV4_ — - 0 -T For a detailed description ofthemenus, seethefollowing.
MENU #6 - DIGITAL SIZE The digital depth display has two size selections: small and large. When the Z-7200 is first turned on, the depth Is displayed with thesmall numbers. To change to a different size, press both arrow keys in the RANGE sectionat the same time. Then press the up or down arrow keys in the RANGE sectionuntil menu 6 displays. Next press the up or down arrows in the ALARM section ofthe keyboard to select the desired digital number size.
MENU #3-Sec (SURFACE CLARITYCONTROL) Themarkings —or noise--at the top of the display can extend manyfeet below thesurface. This interferes withfishsignalsand other targets. These markings are Surface Clutter and are caused by wave action, boat wakes, baitfish, temperature inversions, and other — :___bsITlvIT — o fN3f1IVl3' MENU #4- DIGITAL kF1 This menu turns thedigital depth display offand on. When the Z-7200 Is turned on, the digital display is on.
