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 features and specifications subjectto change without notice. All screens in this manual are simulated. 26 PDF compression, OCR, web-optimization with CVISION's PdfCompressor 4. [. . . ] 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. Pressing the ON/CLEAR key also clears it. 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. It is adjustable when the unit is in the manual mode, however. To do so, first put the unit in the manual mode. Nowpress the ON/CLEAR key to clearthe screen. Then pressthe menu key until the 'RANGE SEL" menu appearsas shown. The current range shows atthe bottomof the menu. 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. This is because you are seeing more of the bottom. [. . . ] Press the downarrow key to increasethe depth, theup arrow key decreases it. The number in the shallow alarm's menu box showsthe current shallow alarm setting. Whenthe number reachesthedesired setting, release the 373FT act ml-373FT --s C-- arrow key. Press the ON/CLEAR key to remove the shallowalarm menu from the screen. [. . . ]