User manual LOWRANCE X-25

[. . . ] X-25 INSTALLATION AND OPERATION INSTRUCTIONS LOWRANCE ELECTRONICS, INC. LITHO IN U. S. A. 988-0105-33 12000 E. SKELLY DR. , TULSA, OK 74128 PDF compression, OCR, web-optimization with CVISION's PdfCompressor N OTES PDF compression, OCR, web-optimization with CVISION's PdfCompressor N 0 T ES TABLE OF CONTENTS INTRODUCTION INSTALLATION POWER CONNECTIONS SPEED/TERMPERATURE SENSOR KEYBOARD BASICS DISPLAY MENUS OPERATION AUTOMATIC RANGE ZOOM Automatic Operation ZOOM- Manual Operation SENSITIVITY GRAYLINE® FISH ID CHARTSPEED DISPLAY MODE ALARMS FISHALARM DEPTH ALARMS LAMP FEET/METER DISPLAY CONTRAST ASP (Advanced Signal Processing) TRANSDUCERS ANDCONE ANGLES SIGNALINTERPRETATION FISH ARCHES WATERTEMPERATURE ANDTHERMOCLINES SURVEYING A LAKE BAITFISH SONAR TROUBLESHOOTING 1 1 - 2 3 4 5 5 6 6 6 7 8 9 9 10 11 12 14 14 14 15 15 16 16 17 18 19 20 22 22 23 Copyright © 1990, Lowrance Electronics, Inc All rights reserved. All screens in this manual are simulated. 26 PDF compression, OCR, web-optimization with CVISION's PdfCompressor 4. Ifthe boat Is motionless, fish stay inthecone, showing on the display as straighthorizontal lines. ELECTRICALNOISE A majorcauseofsonarproblemsis electrical noise. [. . . ] Schooling fish suspended over deep waterlie at the level that provides this temperature. We assume they are the most comfortable here. a - F MENUS The X-25uses menus to guide you throughthe unit's functionsand features. The menu key accessesthese features, allowingyou to customize the unitto your particularneeds and waterconditions. All you have to do to leaveone menu and enter anotheris pressthe menu key repeatedly. This clears the menus from the screen, 5 20 PDF compression, OCR, web-optimization with CVISION's PdfCompressor Menus change depending on the mode the unit is in. For example, if theautomatic mode is turned off, the sensitivity menu changes from "AUTO SENS"to "MAN SENS. " Other messages mayappearin menu boxes or new menus canappear, again depending on previous selections. FISH ARCHES Fish arches are created whenthe coneof sound passes over a fish. The distanceto a fish when thecone first strikes it is shown as "A" below. When the center of the cone strikes the fish, the distanceis shorter as shown "B". As the cone leaves the fish, the distance increases again as shown in "C". OPERATION AUTOMATIC BOATSDIRECTION OF TRAVEL Whenthe X-25 is firstturned on, theautomaticfeature is enabled. This feature automatically adjuststhe unit's rangeand sensitivity according to waterconditions. It alwayskeepsthe bottom depth displayed in the lower portionof the screen. iiUTO To turn theautomaticfeatureoff, press the menu key until the AUTO/MANmenu appears. This highlights the letters "MAN. " The unit is now in the manual mode. Wait a few secondsand the menu will scroll off the screen's left side. To turn the automatic feature on again, repeat the above steps, exceptthis time press theup arrow key. RANGE You can't adjustthe range whenthe X-25 is in the automatic mode. Then pressthe menu key until the 'RANGE SEL" menu appearsas shown. Now pressthe up arrow key to decreasetherange, the down arrow key increases the range. After you selectthedesired range, press the A B C When the Fish ID. mode is off, the depth of the waterwill affect the size and shapeQf the fish arch due to thecone angle diameter. For example, if the cone passesover a fish in shallow water, the signal displayed on the X-25 may not arch at all. This is due to the narrow cone diameterand the resolution limitations of the display. 19 PDF compression, 6OCR, web-optimization with CVISION's PdfCompressor Both 8 degreeand 20 degreetransducers give accurate bottom readings, eventhough the bottom signal is much wideron the 20 degree model. The rest of the signal tells you whetheryou are over rocks, mud, etc. ON/CLEAR key to clear the display. ZOOM it will SIGNAL INTERPRETATION YourX-25 gives an accurate picture of the bottomthat your boat is passing. [. . . ] It's adjustable by pressing the menu key until the chart speed menu ___________________ appears. The bar graph in the Chart CHART . ec Speed menu box shows a graph of the SPEED speed. Echoes scrolling onto the screen will also showthe effectsof the change. If you reach the maximum or minimum level, an warning tone sounds. ShallowAlarm To set the shallowalarm, press themenu key repeatedly until the"SHAL ALARM" menu appears. [. . . ]