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Lowrance X-25

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Lowrance X-25Lowrance GB-8 Mounting Bracket For: X-22 25 45 51-82


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Brand: LOWRANCE ELECTRONICS
Part Number: 51-82
UPC: 042194503110


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Comments to date: 3. Page 1 of 1. Average Rating:
a-bec 4:07pm on Friday, June 11th, 2010 
Warning: Lowrance GPS are designed by idiots This is by far the worst designed GPS of the four I have owned. The more I have used it. Excellent buy for $200 but needs $28 external antenna to be even better I received this for my BD for $200 at www.ebuyer.com .
Llelan D. 3:55pm on Friday, May 28th, 2010 
Excellent buy for $200 but needs $28 external antenna to be even better I received this for my BD for $200 at www.ebuyer.com .
theguyfromsaturn 9:13pm on Saturday, May 1st, 2010 
Warning: Lowrance GPS are designed by idiots This is by far the worst designed GPS of the four I have owned. The more I have used it.

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INSTALLATION AND OPERATION INSTRUCTIONS

TABLE OF CONTENTS

INTRODUCTION.... 3 SPECIFICATIONS... 3 INSTALLATION... 4 INSTALLATION - Bracket.... 4 POWER CONNECTIONS.... 5 KEYBOARD BASICS.... 6 DISPLAY..... 6 MENUS..... 7 OPERATION.... 7 AUTOMATIC.... 7 RANGE..... 8 RANGE - UPPER AND LOWER LIMITS... 8 ZOOM.... 9 SENSITIVITY.... 11 GRAYLINE...... 12 FISH ID.... 12 FISHTRACK..... 13 CHART SPEED.... 14 DISPLAY MODE.... 14 ALARMS.... 15 LIGHT.... 16 FEET/METERS.... 16 DISPLAY CONTRAST.... 17 ASP (Advanced Signal Processing)... 17 SIMULATOR.... 18 FISH ARCHES..... 19 WATER TEMPERATURE AND THERMOCLINES... 20 TROUBLESHOOTING.... 21 WARRANTY.... 25 UPS RETURN SERVICE - USA ONLY... 26 MISSING PARTS.... 28 HOW TO OBTAIN SERVICE - INTERNATIONAL ONLY.. 29
Copyright 1995 Lowrance Electronics, Inc. All rights reserved. All features and specifications in this manual are subject to change without notice. All screens in this manual are simulated.
INTRODUCTION Thank you for purchasing a Lowrance sonar. Your X-25B is a high quality sonar designed for both professional and novice fishermen. These units have an automatic feature that finds and displays the bottom, fish, structure, and more! All you have to do is press the on key. However, if you wish to fine tune the unit, simply press the menu key. The X-25B has powerful features available through easy-to-use menus. To get started with your Lowrance unit, first read the installation section. This is where it all begins. Improper installation can cause problems down the road. After youve read the instructions, install the unit, then read the rest of the manual. The more you know about your unit, the better it will perform for you. Take this manual for reference when you head for the water.
SPECIFICATIONS Dimensions.. 5.9" W x 5.35" H x 3.4" D Input Voltage.. 10 - 15 vDC Current Drain. 350 ma (lights off).. 500 ma (lights on) Transmitter Frequency.. 192 kHz Output Power.. 600 watts (peak-to-peak).. 75 watts (RMS) Display.. 100 pixels (H) x 65 pixels (W).. Supertwist Liquid Crystal Display

5.9" 3.4"

NOTICE! The storage temperature for your unit is from -4 degrees to +167 degrees Fahrenheit (-20 degrees to +75 degrees Celcius). Extended storage in temperatures higher or lower than specified will damage the liquid crystal display in your unit. This type of damage is not covered by the warranty. For more information, contact the factory customer service department or your local service center.

5.35"

INSTALLATION - Bracket You can install the X-25B on the top of a dash or from an overhead with the supplied bracket. It can also be installed in the dash with an optional IDA3 or IDA-4 mounting kit. If you use the supplied bracket, you may be interested in the optional GBSA-1 swivel bracket kit. This converts the X25B's gimbal bracket to a swivel mount which can be used on the dash or overhead mounting positions. Installation instructions for the in-dash and swivel mounting kits are supplied with the adapter kits. Mount the X-25B in any convenient location, provided there is clearance when its tilted for the best viewing angle. Holes in the brackets base allow wood screw or through bolt mounting. It may be necessary to place a piece of plywood on the back side of thin panels to reinforce the panel. Make certain there is enough room behind the unit to attach the power and transducer cables. Drill a hole in the dash for the power and transducer cables. The best location for this hole is immediately under the gimbal bracket. This way, the bracket covers the hole. The smallest hole the power or transducer cable connector can pass through is 3/4". However, you cant pass a power or transducer connector and another cable through a 3/4" hole. Therefore, after drilling the hole, pass the transducer connector up through the hole from under the dash. Then drop the power cable down from the front side of the dash. After installing the transducer and power cables, slide the bracket over the hole, then route the transducer and power cables out the slot in the back of the bracket. Finally, fasten the bracket to the dash.

X-25B GIMBAL BRACKET WASHER

GIMBAL KNOB

Attach the X-25B to the gimbal bracket using the supplied gimbal knobs and washers as shown above.
POWER CONNECTIONS The X-25B works from a 12 volt DC system only. For the best results, run the power cable directly to the boats battery. Keep the power cable away from other boat wiring, especially the engines wires. This will give the best isolation from electrical noise. If the supplied cable is not long enough to reach the battery, splice #18 gauge insulated wire to it. If you do extend the power cable, make certain to attach the in-line fuse holder supplied with the X-25B to the battery or power source. This will protect both the unit and the power cable in the event of a short. Use only a 3-amp fuse. IMPORTANT! Do not use this product without a 3-amp fuse wired into the power cable! Failure to use a 3-amp fuse will void your warranty! You can also attach the power cable to an accessory or power buss, however, you may have problems with electrical interference. This units 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.

RED WIRE BLACK WIRE

3 amp FUSE

12 VOLT BATTERY 5

KEYBOARD BASICS The unit sounds a tone when you press any key. This tells you the unit has accepted a command. ON/CLEAR Use this key to turn the unit on. It also clears menu selections and the menus from the screen. OFF This key turns the unit off. MENU The X-25B has many features that are accessed with this key. To see the first menu, press the MENU key. To see the other menus, press the MENU key repeatedly. UP and DOWN ARROWS Use these keys to adjust virtually every feature and function on the unit. NOTE: The up arrow key also stops the chart when no menus are displayed. In other words, anytime you wish to stop the chart, first make certain no menu is on the screen. Now press the up arrow key. The chart freezes and the word STOP appears at the top of the screen. To start the chart, press the up arrow key again. DISPLAY - General The lights flash for about ten seconds when the X-25B is turned on. Three menus appear, one after the other. The menus are the lights (LAMP), feetmeter selection (FEET/METER), and contrast adjustment (DARK/LIGHT). To turn the lights on, press the up arrow key. To switch from feet to meters, press the down arrow key when the proper menu appears. To adjust the contrast, wait for the DARK/LIGHT menu to appear. Now press the up arrow key to darken the screen, the down arrow to lighten it. The menus disappear after a few seconds. If you dont want to wait, press the ON/ CLEAR key to clear the menus from the screen. When the X-25B is first turned on, the display appears similar to the one at right. The unit is in the automatic mode. The depth range displays on the upper left side of the screen.

In the example shown at the bottom of the previous page, the range is from 0 to 60 feet and the bottom depth is 34.4 feet. NOTE: Turning the X-25B off erases all user settings and it returns to the system defaults. For example, if you turn the lights on, then turn the unit off, the next time you turn the unit on, the lights will be off, since the default setting for the lights is off. MENUS The X-25B uses menus to guide you through the units functions and features. The menu key accesses these features, allowing you to customize the unit to your particular needs and water conditions. All you have to do to leave one menu and enter another is press the menu key repeatedly. If you ever get lost in the menus, simply press the ON/CLEAR key. This clears the menus from the screen. Menus change depending on the mode the unit is in. For example, if the automatic mode is turned off, the sensitivity menu changes from AUTO SENS to MAN SENS. Other messages may appear in menu boxes or new menus can appear, again depending on previous selections. On the screen shown on the previous page, the lamp menu is showing. Pressing the up arrow key while this menu is on the screen turns the back lights on.

OPERATION

AUTOMATIC When the X-25B is first turned on, the automatic feature is enabled. This feature automatically adjusts the units range and sensitivity according to water conditions. It always keeps the bottom depth displayed in the lower portion of the screen. To turn the automatic feature off, press the menu key until the AUTO/MAN menu appears. Now press the down arrow key. This highlights the letters MAN. The unit is now in the manual mode. Wait a few seconds and the menu will scroll off the screens left side. Pressing the ON/CLEAR key also clears it. To turn the automatic feature on again, repeat the above steps, except this time press the up arrow key.
RANGE You cant adjust the range when the X-25B 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. Now press the ON/CLEAR key to clear the screen. Then press the menu key until the RANGE SEL menu appears as shown below. The current range shows at the bottom of the menu. In this case, the range is 60 feet. Now press the up arrow key to decrease the range, the down arrow key increases the range. After you select the desired range, press the ON/CLEAR key to clear the display. If you wait a few seconds, it automatically clears. The X-25B has the following ranges: 10, 20, 40, 60, 120, 240, 480, and 900 feet. and 5, 10, 20, 40, 60, 100, 200, and 300 meters. NOTE: The depth capability of the X-25B depends on the transducer installation, water and bottom conditions, and other factors. RANGE - Upper and Lower Limits The X-25B lets you change the upper and lower range limits when it's in the manual mode. This lets you "zoom" in on segments of the water as small as 10 feet. In other words, you can set the upper limit to 25 feet and the lower limit to 35 feet, regardless of the bottom depth. This in essence, gives you a 10 foot zoom. You can choose any segment of the water, as long as the distance between the upper limit and lower limit is 10 feet (10 meters) or more. To change the upper limit, first make certain the unit is in the manual mode. Next, press the MENU key until the "UPPER LIMIT" menu appears. Now press the down arrow key to increase the upper limit or the up arrow key to increase it. After you've finished, wait a few

21 FOOT UPPER LIMIT

seconds and the menu will scroll off the screens left side. Pressing the ON/ CLR key also clears it. To change the lower limit, again make certain the unit is in the manual mode. Press the MENU key until the "LOWER LIMIT" menu appears. Now press the down arrow key to increase the lower limit or the up arrow key to increase it. When you have the limit set, wait a few seconds and the menu will scroll off the screens left side. Pressing the ON/CLR key also clears it.
ZOOM The zoom feature enlarges all echoes on the screen. If the unit is in the automatic mode, it tracks the bottom signal, always keeping it near the bottom of the screen. This lets you see small detail, at the same time enlarging all echoes that appear on the screen. The unit doesnt track the bottom in the manual mode, and the adjustments are slightly different. Zoom - Automatic Operation To zoom the display, first press the MENU key until the RANGE/ZOOM menu appears as shown at right. Now press the down arrow key. This switches the unit into the zoom mode. A new menu immediately appears as shown at the top of the next page.
This is the zoom size menu. Zoom size is the distance between the upper limit and the lower limit. The upper limit shows at the top left corner of the screen. The lower limit is in the bottom left corner. For example, if the upper limit is 40 feet and the lower limit is 70 feet, the zoom window size is 30 feet. The word TRACK appears in this menu when you first activate the zoom as shown below. This means the X-25B is tracking the bottom in a zoom window, always keeping it on the display. Press the up arrow key to decrease the zoom size, press the down arrow key to increase the zoom size. When the unit is switched into the zoom mode, the letters ZM appear at the top of the screen. The zoom window size displays in the top right corner of the screen. On the screen shown at right, the zoom size has been changed to 20 feet. To turn the zoom feature off, press the menu key until the RANGE/ZOOM menu appears. Now press the up arrow key. This switches the unit into the range mode, which turns the zoom feature off. The X-25B has the following zoom ranges: 10, 20, 30, 60, 120, 240, and 480 feet and 5, 10, 20, 30, 50, 100, and 150 meters.

Zoom - Manual Operation To operate the zoom feature when the X-25B is in the manual mode, first press the menu key. Then press the down arrow key in the RANGE/ZOOM menu to place the X-25B in the zoom mode. The zoom size menu automatically appears next. You can change the zoom size by pressing the up or down arrows. After you select the desired zoom size, press the
menu key until the MOVE ZOOM menu appears. This menu lets you move the zoom window up or down in one foot increments by pressing the arrow keys. Thus, you can move the zoom window up towards the surface, down to the bottom, or anywhere in between. The window stays where you put it. It doesnt track the bottom signal. To turn the zoom feature off, press the menu key until the RANGE/ZOOM menu appears. Now press the up arrow key. This switches the unit into the range mode, which turns the zoom feature off. SENSITIVITY The sensitivity menu lets you control the units ability to pick up echoes. A low sensitivity level excludes much of the bottom information, fish signals, and other detail. High sensitivity settings lets you see features, but it can also clutter the screen with noise and other unwanted signals. Typically, the best sensitivity level shows a good, solid bottom signal with grayline. The X-25B adjusts the sensitivity level to keep a solid bottom signal on the screen. It adds a little extra when its in the automatic mode. This gives it the capability to show fish and other detail. However, situations occur where it becomes necessary to increase or decrease the sensitivity level. Typically, this occurs when you wish to see more detail, so you need to increase the sensitivity. The procedure to adjust it is the same whether the unit is in the automatic or manual mode. To change the sensitivity level, first press the menu key until the sensitivity menu appears. If the unit is in automatic, the menu shows AUTO SENS. Otherwise, the menu shows MAN SENS. Now press the up arrow key to increase the sensitivity, the down arrow to decrease it. A vertical bar graph in the menu box shows the sensitivity level. Echoes scrolling onto the screen will also show the effects of the sensitivity change. If you reach the maximum or minimum sensitivity level, a tone sounds alerting you to the limits. After youve adjusted the unit to the desired sensitivity level, press the ON/
CLEAR key to clear the display. If you wait a few seconds, it will automatically clear.
GRAYLINE Grayline lets you distinguish between strong and weak echoes. It paints gray on targets that are stronger than a preset level. This shows the difference between a hard or soft bottom, large fish versus smaller ones, or rocks and brush on the bottom. For example, a soft, muddy, or weedy bottom returns a weaker signal which shows a narrow or no gray line. A hard bottom returns a strong signal that causes a wide gray line. If you have two targets of equal size, one with gray and the other without, the target with gray is the stronger echo. This helps distinguish fish from structure, or the larger fish from a smaller one. Grayline is adjustable. Since it shows the difference between strong and weak echoes, changing the level may require a different sensitivity setting. To change the Grayline level, first press the MENU key until the Grayline menu appears. Now press the up arrow key to increase the level, the down arrow to decrease it. The bar graph in the Grayline menu box shows the level of Grayline now in use. Echoes scrolling onto the screen will also show the effects of the Grayline change. If you reach the maximum or minimum level, a tone sounds alerting you to the limits. The level chosen by the X-25B when its first turned on is usually adequate for most conditions. Experiment with your unit to find the Grayline setting thats best.

FISH ID FEATURE The Fish ID feature identifies targets that meet certain conditions as fish. The microcomputer analyses all echoes and eliminates surface clutter, thermoclines, and other undesirable signals. In most instances, remaining targets are fish. The Fish ID feature displays symbols on the screen in place of the actual fish echoes. There are four symbol sizes: tiny, small, medium, and large. These show the relative size between targets. In other
words, it displays a small fish symbol when it thinks a target is a small fish, a medium fish symbol on a larger target, etc. The microcomputer is sophisticated, but it can be fooled. It can't distinguish between fish and other suspended objects such as turtles, submerged floats, air bubbles, etc. Individual tree limbs extending outwards from a group of limbs are the hardest objects for the Fish ID feature to distinguish from fish. You may see Fish ID symbols on the screen when, in fact, there are no fish. Practice with the unit when the Fish ID feature is on and off to become more familiar with Fish ID. To turn this feature on, press the menu key until the Fish ID features menu appears as shown at right. Now press the up arrow key. This turns the feature on. To turn it off, repeat the above steps, but press the down arrow key instead. The Fish ID feature cant be used when the X-25B is in the manual mode. If you turn the automatic feature off, the Fish ID feature will automatically be turned off, also. FISHTRACK The X-25B automatically displays the depth of a target when the Fish ID feature places a fish symbol on the screen as shown below left. This feature is automatically enabled when the X-25B is turned on. To turn it off or on again, press the MENU key repeatedly until the Fish Track menu appears as shown below. Now press the down arrow key to turn it off. Remember, Fish ID must be on in order to use the Fish Track feature.
CHART SPEED The rate echoes scroll across the screen is called the chart speed. Its adjustable by pressing the menu key until the chart speed menu appears. Chart speed is set to maximum when the X-25B is first turned on. To decrease it, press the down arrow key. Press the up arrow key to increase the speed again. The bar graph in the Chart Speed menu box shows a graph of the speed. Echoes scrolling onto the screen will also show the effects of the change. If you reach the maximum or minimum level, an warning tone sounds. To stop the chart, first clear any menu from the screen by pressing the ON/ CLEAR key. You cant stop the chart while a menu is displayed. Now press the up arrow key. The chart will freeze and the word STOP appears at the top right portion of the screen. To start the chart, press the up arrow key again.

DISPLAY MODE The X-25B has three different screen modes. To change modes, press the MENU key until the DISP MODE (Display Mode) menu appears. Then press the up or down arrow keys until the desired mode number appears. The modes are as follows: CHT 1 (Chart #1) 1. Automatic On 2. Fish I.D. Off 3. Digital depth display On.
CHT 2 (Chart #2) This is the High Speed Scroll mode. It has the following features: 1. Automatic Off 2. Fish ID Feature Off 3. All Digital Displays Off
Digital This is the digital only screen. It shows the digital depth display at the top of the screen in very large numbers. The shallow and deep alarm settings are displayed beneath the digital depth. No chart shows on this screen.
ALARMS FISH ALARM The Fish Alarm sounds a tone when a fish symbol appears on the screen. To use the fish alarm, press the menu key until the FISH ALARM menu appears on the screen. Now press the up arrow key to turn the alarm on. Repeat the above steps to turn the fish alarm off. (Note: If the Fish ID feature is off, it will be turned on when you turn the fish alarm on.) DEPTH ALARMS The depth alarms are triggered only by the bottom signal. No other echoes will activate these alarms. The depth alarms consist of a shallow and deep alarm. The shallow alarm sounds an alarm tone when the bottom goes shallower than the alarms setting. The deep alarm sounds a tone when the bottom goes deeper than its setting. Both alarms adjust the same, although through different menus. Shallow Alarm To set the shallow alarm, press the menu key repeatedly until the SHAL ALARM menu appears. Press the down arrow key to increase the shallow alarm's depth setting, the up arrow key decreases it. The number in the shallow alarms menu box shows the current shallow alarm setting. When the number reaches the desired setting, release the arrow key. When the bottom depth goes shallower than the alarms setting an alarm tone
sounds. At the same time the alarm sounds, a message box appears on the screen as shown at right. Press the up arrow key to silence the alarm. This will turn the alarm sound off until the shallow alarm is triggered again. To turn the alarm off, press the menu key until the shallow alarm menu appears. Then press the up arrow key until the word OFF appears. Deep Alarm The deep alarm adjusts the same as the shallow alarm. Use the DEEP ALARM menu to adjust the deep alarm. When the bottom signal goes deeper than the setting, an alarm tone sounds.
LIGHTS The X-25Bs display is backlighted for night use. To turn the backlights on or off, press the menu key repeatedly until the LAMP menu appears. Now press the up arrow to turn the lights on or the down arrow to turn them off. The menu will clear automatically after a few seconds.

FEET/METER The X-25B can show the depth in feet or meters When the unit is in the metric mode, all depth readings, ranges, zooms, and alarm settings are in meters. When a unit is in the feet mode, all of the above settings are in feet. To change from feet to meters or vice-versa, press the menu key until the FEET/METER menu appears as shown at the bottom of the previous page. Press the down arrow key to
switch to metric, the up arrow to switch to feet. Displays show in feet when the unit is first turned on. The menu will clear automatically after a few seconds or you can press the ON/CLEAR key to clear the screen. DISPLAY CONTRAST The units display contrast is adjustable to suit different lighting conditions. This will help you see the screen from different angles, or at various times of the day. To adjust the contrast, press the menu key until the DARK/LIGHT menu appears. To decrease it, press the down arrow key. Press the up arrow key to increase the contrast. The bar graph in the Dark/Light menu box shows a graph of the contrast. The screen will also show the effects of the change. If you reach the maximum or minimum level, a tone sounds alerting you to the limits. The menu will clear automatically after a few seconds or press the ON/CLEAR key to clear the screen.
ASP (Advanced Signal Processing) ASP is a program embedded in the X-25Bs computer that is specifically designed to eliminate noise. It continually monitors the signals from the receiver, determines which echoes are noise and rejects them. This allows true target echoes to display on the screen with a minimum of clutter. This feature is especially useful since it typically lets you operate the boat at all speeds without adjusting the sensitivity or other controls. When the X-25B is first turned on, ASP is enabled. To turn ASP off, press the menu key repeatedly until the ASP menu appears. Now press the up arrow to turn it on or the down arrow to turn it off. The menu will clear automatically after a few seconds or you can press the ON/ CLEAR key to clear the screen.
SIMULATOR The X-25B has a simulator built into it that can show a simulated bottom signal with fish. All features of the X-25B work normally when the simulator is in use. You can change the range, zoom, and use the alarms as desired. To use the simulator, press the menu key repeatedly until the SONAR SIM menu appears. Now press the up arrow to turn it on. Repeat the above steps to turn it off, or turn the unit off and back on again.
FISH ARCHES Fish arches are created when the cone of sound passes over a fish. The distance to a fish when the cone first strikes it is shown as "A" below. When the center of the cone strikes the fish, the distance is shorter as shown "B". As the cone leaves the fish, the distance increases again as shown in "C". When the Fish I.D. mode is off, the depth of the water will affect the size and shape of the fish arch due to the cone angle diameter. For example, if the cone passes over a fish in shallow water, the signal displayed on the X-25B may not arch at all. This is due to the narrow cone diameter and the resolution limitations of the display. Very small fish probably will not arch at all. Medium sized fish will show a partial arch, or a shape similar to an arch if theyre in deep water.

Unit freezes, locks up, or operates erratically: 1. Electrical noise from the boats motor, trolling motor, or an accessory may be interfering with the sonar unit. Rerouting the power and transducer cables away from other electrical wiring on the boat may help. Route the sonar units power cable directly to the battery instead of through a fuse block or ignition switch 2. Inspect the transducer cable for breaks, cuts, or pinched wires. 3. Check the transducer and power connector. Make certain it's securely plugged in to the unit. Weak bottom echo, digital readings erratic, or no fish signals: 1. Make certain transducer is pointing straight down. Clean the face of the transducer. Oil, dirt, and fuel can cause a film to form on the transducer, reducing its effectiveness. If the transducer is mounted inside the hull, be sure it is shooting through only one layer of fiberglass and that it is securely bonded to the hull. Do NOT use RTV silicone rubber adhesive or MarinetexTM. 2. Electrical noise from the boats motor can interfere with the sonar. This causes the sonar to automatically increase its Discrimination or noise rejection feature. This can cause the unit to eliminate weaker signals such as fish or even structure from the display. 3. The water may be deeper than the sonars ability to find the bottom. If the sonar cant find the bottom signal while its in the automatic mode, the digital 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 range to a realistic one, (for example, 0-100 feet) and increase the sensitivity. As you move into shallower water, a bottom signal should appear. 4. Check the battery voltage. If the voltage drops, the units transmitter power also drops, reducing its ability to find the bottom or targets. Bottom echo disappears at high speeds or erratic digital reading or weak bottom echo while boat is moving 1. The transducer may be in turbulent water. It must be mounted in a smooth flow of water in order for the sonar to work at all boat speeds. Air bubbles in the water disrupt the sonar signals, interfering with its ability to find the bottom or other targets. The technical term for this is Cavitation. 2. Electrical noise from the boats motor can interfere with the sonar. This
causes the sonar to automatically increase its Discrimination or noise rejection feature. This can cause the unit to eliminate weaker signals such as fish or even structure from the display. Try using resistor spark plugs or routing the sonar units power and transducer cables away from other electrical wiring on the boat. No fish arches when the Fish ID feature is off: 1. Make certain transducer is pointing straight down. This is the most common problem if a partial arch is displayed. See the Fish Arch section in your owner's manual for more information. 2. The sensitivity may not be high enough. In order for the unit to display a fish arch, it has to be able to receive the fishs echo from the time it enters the cone until it leaves. If the sensitivity is not high enough, the unit displays the fish only when it is in the center of the cone. 3. Use the Zoom feature. It is much easier to display fish 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 display 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 display as straight horizontal lines. ELECTRICAL NOISE A major cause of sonar problems is electrical noise. This usually appears on the sonars display as random patterns of dots or lines. In severe cases, it can completely cover the screen with black dots, or cause the unit operate erratically, or not at all. To eliminate or minimize the effects of electrical noise, first try to determine the cause. With the boat at rest in the water, the first thing you should do is turn all electrical equipment on the boat off. Make certain the engine is off, also. Turn your X-25B on, then turn off ASP (Advanced Signal Processing). There should be a steady bottom signal on the display. Now turn on each piece of electrical equipment on the boat and view the effect on the sonars display. For example, turn on the bilge pump and view the sonar display for noise. If no noise is present, turn the pump off, then turn on the VHF radio and transmit. Keep doing this until all electrical equipment has been turned on, their effect on the sonar display noted, then turned off. If you find noise interference from an electrical instrument, trolling motor,

pump, or radio, try to isolate the problem. You can usually reroute the sonar units power cable and transducer cable away from the wiring that is causing the interference. VHF radio antenna cables radiate noise when transmitting, so be certain to keep the sonars wires away from it. You may need to route the sonar units power cable directly to the battery to isolate it from other wiring on the boat. If no noise displays on the sonar unit from 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 appears 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 units power cable away from engine wiring. Again, routing the power cable directly to the battery helps eliminate noise problems. Make certain to use the in-line fuse supplied with the unit when wiring the power cable to the battery! When no noise appears on the sonar unit after all of the above tests, then the noise source is probably cavitation. Many novices or persons with limited experience make hasty sonar installations which function perfectly in shallow water, or when the boat is at rest. In nearly all cases, the cause of the malfunction will be the location and/or angle of the transducer. The face of the transducer must be placed in a location that has a smooth flow of water at all boat speeds. Read your transducer owners manual for the best mounting position.
LOWRANCE ELECTRONICS FULL ONE-YEAR WARRANTY
We, our, or us refers to LOWRANCE ELECTRONICS, INC., the manufacturer of this product. You or your refers to the first person who purchases this product as a consumer item for personal, family, or household use. We warrant this product against defects or malfunctions in materials and workmanship, and against failure to conform to this products written specifications, all for one year (1) from the date of original purchase by you. WE MAKE NO OTHER EXPRESS WARRANTY OR REPRESENTATION OF ANY KIND WHATSOEVER CONCERNING THIS PRODUCT. Your remedies under this warranty will be available so long as you can show in a reasonable manner that any defect or malfunction in materials or workmanship, or any non-conformity with the products written specifications, occurred within one year from the date of your original purchase, which must be substantiated by a dated sales receipt or sales slip. Any such defect, malfunction, or non-conformity which occurs within one year from your original purchase date will either be repaired without charge or be replaced with a new product identical or reasonably equivalent to this product, at our option, within a reasonable time after our receipt of the product. If such defect, malfunction, or nonconformity remains after a reasonable number of attempts to repair by us, you may elect to obtain without charge a replacement of the product or a refund for the product. THIS REPAIR, 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 exclusion or limitation of incidental or consequential damages, so the above limitations or exclusions may not apply to you. This warranty does NOT apply in the following circumstances: (1) when the product has been serviced or repaired by anyone other than us, (2) when the product has been connected, installed, combined, altered, adjusted, or handled in a manner other than according to the instructions furnished with the product, (3) when any serial number has been effaced, altered, or removed, or (4) when any defect, problem, loss, or damage has resulted from any accident, misuse, negligence, or carelessness, or from any failure to provide reasonable and necessary maintenance in accordance with the instructions of the owners manual for the product. We reserve the right to make changes or improvements in our products from time to time without incurring the obligation to install such improvements or changes on equipment or items previously manufactured. This warranty gives you specific legal rights and you may also have other rights which may vary from state to state. REMINDER: You must retain the sales slip or sales receipt proving the date of your original purchase in case warranty service is ever required.

LOWRANCE ELECTRONICS

12000 E. SKELLY DRIVE TULSA, OK 74128

(800) 324-1356

Lowrance's UPS Return Service
Lowrance Electronics and United Parcel Service (UPS) are proud to offer all of our customers free shipping for all units sent to us for repair or service. If you have to send this unit to the factory, and you are in the continental United States, use the enclosed UPS shipping label for easy, free shipping to our factory customer service department. There are six easy steps: 1.Call Lowrance at the toll-free number on the front of this flyer for a Return Authorization (RA) number and instructions about what accessories to return. Do not return a product to the factory without a Return Authorization (RA) Number! 2.Pack your unit and any accessories in the original shipping container, if possible. Be sure to include proof of purchase for warranty verification! 3. Write a brief note detailing the problem you're having with the unit. Please include your name, address, and daytime telephone number. 4. Please include payment for non-warranty repairs. Check, money order, Visa, or MasterCard may be used. 5.Fill in your name, address, zip code, date, and RA number in the blanks provided on the UPS form included with your unit. 6.Attach the label to the shipping box, tear off the tab for your receipt and give the package to any UPS driver or take the package to any UPS Customer Center. You will not be charged for this shipment. That's it! Your unit will be shipped to Lowrance's customer service department at no charge to you. Our normal in-plant turnaround on repairs is 3 working days. Units under warranty will be returned to you at no charge.
Lowrance will pay UPS surface shipping charges both to and from the factory for this unit in the event it needs repair. Your unit is insured against loss or shipping damage when you use the enclosed UPS label.

KEEP THIS LABEL!

YOU WILL NEED IT IF YOU EVER NEED TO RETURN YOUR UNIT TO THE FACTORY FOR REPAIR.
This UPS shipping offer is good only in the continental United States (excludes Alaska and Hawaii).
Lowrance Electronics may find it necessary to change or end our shipping policies, regulations, and special offers at any time. We reserve the right to do so without notice.
Accessory Ordering Information
To order accessories such as power cables or transducers, please contact:
1) Your local marine dealer. Most quality dealers that handle marine electronic equipment should be able to assist you with these items. Consult your local telephone directory for listings. 2) LEI Extras, Inc. P.O. Box 129 Catoosa, OK 74015-0129 or call 800-324-0045 (USA orders only.)

NOTICE!

Please check the items in the box against this list. You should have all of the items shown on this page. If you are missing any of the items, please call our special toll-free number:

1-800-324-1353

A RECORDED MESSAGE will request the following information. Please have it ready before you call. 1. Your name, shipping address, and telephone number. 2. The part that's missing. 3. The model, serial number, and DATE AND PLACE OF PURCHASE OF YOUR UNIT. 4. The best time of day to call you if we have questions. Provided that all of the requested information is recorded and approved by our Customer Service Department, the missing item(s) will be shipped directly to you free of charge.

DISPLAY UNIT

RUBBER WASHER

GIMBAL BRACKET

TRANSDUCER, BRACKET, AND HARDWARE

POWER CABLE

FUSE HOLDER

How to Obtain Service

(Canadian Customers Only)
We back your investment in quality products with quick, expert service and genuine Lowrance replacement parts. If you need service or repairs, contact the Lowrance Factory Customer Service Department at the toll-free number listed below. A technician may be able to solve the problem and save you the inconvenience of returning your unit. You will be asked for your unit's serial number.

800-324-1356

Canada Only. Monday through Friday 8:00 A.M. - 8:00 P.M. Central Time.
(International Customers Only)
If you need service or repairs, contact the dealer in the country you purchased your unit. WARRANTY REPAIR WILL BE HONORED ONLY IN THE COUNTRY UNIT WAS PURCHASED. Please follow the shipping instructions shown below on this page if you have to mail your unit to the dealer. For proper testing, repair, and service, send a brief note with the product describing the problem. Be sure to include your name, return shipping address, and a daytime telephone number.

Shipping Information

When sending a product for repair, please do the following: 1. Always use the original shipping container and filler material the product was packed in when shipping your product. 2 Always insure the parcel against damage or loss during shipment. Lowrance does not assume responsiblity for goods lost or damaged in transit. 3. For proper testing, repair, and service, send a brief note with the product describing the problem. Be sure to include your name, return shipping address, and a daytime telephone number.

doc1

INSTALLATION AND OPERATION INSTRUCTIONS
LOWRANCE ELECTRONICS, INC.

LITHO IN U.S.A.

988-0105-33
12000 E. SKELLY DR., TULSA, OK 74128
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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
Copyright 1990, Lowrance Electronics, Inc All rights reserved. All features and specifications subjectto change without notice. All screens in this manual are simulated.
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4. The boatmust bemovingataslowtrollingspeed to seefish arches. Ifthe boat Is motionless, fish stay inthecone,showing on the display as straighthorizontal

lines.

ELECTRICALNOISE A majorcauseofsonarproblemsis electrical noise. Thisusuallyappearson the sonar's display as random patternsof dots or lines. In severe cases, it can completelycoverthe screenwith blackdots, orcause the unit operateerraticly, or not at all.
To eliminate or minimize the effectsof electrical noise, firsttry to determinethe cause. With the boat at rest in the water,the firstthing you shoulddo is turn all electrical equipmenton the boat off. Make certain the engine is off, also. Turn yourX-25 on, thenturn offASP (Advanced Signal Processing). Thereshouldbe a steady bottom signal on the display. Now turn on each piece of electrical equipmentonthe boat and viewtheeffecton the sonar's display. For example, turnonthebilgepumpand viewthesonardisplayfornoise. Ifno noise is present, turnthe pumpoff, thenturnon the VHF radio and transmit. Keepdoing this until all electrical equipmenthas been turned on, their effect on the sonar display noted, then turned off.
Ifyoufindnoiseinterference from an electrical instrument, trolling motor, pump, or radio, try to isolate the problem. You can usually re-routethe sonar unit's power cable and transducer cable away from the wiring that is causing the interference. VHF radioantennacablesradiate noise when transmitting, so be certain to keep the sonar'swires awayfromit. Youmayneedto route the sonar unit'spowercabledirectlyto the batterytoisolate itfromotherwiringonthe boat. If no noise displays on the sonar unit from electrical equipment, then make certain everythingexcept the sonar unit is turned off, then start the engine. Increase the RPMwiththe gearshift in neutral. If noise appears on the display, the problemcouldbe one of threethings;sparkplugs, alternator, ortachometer lIters, orrouting thesonarunit's wiring. Try using resistorspark plugs, alternatorf powercableawayfrom engine wiring. Again, routing the powercabledirectlyto the batteryhelpseliminatenoise problems. Makecertain to use the in-line fuse supplied with the unit when wiringthe powercableto the battery.
When no noiseappears on the sonarunit after all of the above tests, then the noise source is probably cavitation, Many novices or persons with limited experiencemake hasty sonar installations which functionperfectlyin shallow water,orwhentheboat is atrest. In nearly allcases, thecause ofthe malfunction will be the location and/or angle of the transducer. The face of the transducer must be placedin a locationthat has asmoothflow of water at all boat speeds. Read your transducerowners manualforthe best mounting position.
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Weak bottom echo, digital readings erratic,or no fish signals(cont.): boat'smotorcaninterfere withthesonar. Thiscauses 2. Electrical noisefromthe thesonarto automatically increase its Discrimination or noise rejection feature. Thiscan cause theunittoeliminate weakersignalssuchasfish oreven structure fromthe display, 3. The water may be deeperthan the sonar's ability to findthe bottom. If the sonarcan'tfind the bottomsignal whileit's in the automaticmode, thedigitalwill flash continuously. It maychangethe range to limitsfargreaterthanthe water you are in. If this happens, place the unit inthe manualmode, then changethe As range toa realistic one, (forexample, 0-100feet)and increase thesensitivity. move Into shallowerwater, a bottomsignal should appear. you 4. Checkthe batteryvoltage, lithevoltagedrops,the unit'stransmitterpower also drops, reducing its ability to find the bottom ortargets. Bottom echo disappears at high speeds or erraticdigItal reading or weak bottom echowhileboat is moving 1. The transducer maybe in turbulentwater. It must be mounted in a smooth flow ofwater in orderforthe sonarto work at all boatspeeds. Air bubbles in the water disrupt the sonar signals,interfering with its ability to find the bottom or othertargets. The technicaltermfor this is 'Cavitation'.

INTRODUCTION

Thank you for purchasing a Lowrancq sonar. Your X-25 is a high quality sonar designed for both professional and novice fishermen. These units have an automatic featurethat finds and displaysthe bottom, fish, structure, and morel All you have to do is pressthe on key. However, if you wish to fine tune the unit, all you have to do is press the menu key. The X-25 has powerful featuresavailable through

easy-to-use menus.

To get started with your unit, first readthe installation section. This is whereit all begins, Improperinstallation can cause problemsdown the road. After you've readthe instnjctions, installthe unit,then readthe rest ofthe manual. The more you know about your unit,the better it will performfor you. Take this manual for reference when you head for the water. INSTALLATION Mountthe X-25 in any convenient location, providedthere is clearance when it's tilted forthebestviewingangle. Holes in the bracket's base allowwood screw or throughbolt mounting. It may be necessaryto place a pieceof plywood on theback side of thin panels to 'reinforce the panel. Make certain there is enough room behind theunit to attach
thesonarto automatically increase its Discrimination or noise rejectionfeature.
2. Electrical noisefromtheboat'smotorcaninterfere withthesonar. Thiscauses
This can causetheunit to eliminate weakersignalssuchasfishoreven structure fromthedisplay. Try using resistorspark plugsorroutingIhe sonarunit'spower and transducer cables awayfrom otherelectrical wiring on the boat.
the power and transducer cables.
No fish arches whenthe Fish ID featureIs off:
1. Make certain the transducer is pointing straight down. This is the most common problem ifa partialarch is displayed. Seethe Fish Archsection inyour owner's manual formore information.
2. The sensitivity maynot be highenough. In orderforthe unitto displaya fish arch, it has to be ableto receive the fish's echo fromthe time it enters the cone
the until It leaves. If the sensitivity is not highenough,the unit displays fish only it is in the centerof the cone. when
3. Use the Zoom feature. It is much easierto displayfish arches whenzoomed in on a smallrange ofwaterthan a largeone. For example, you will have much betterluckseeing fish arches with a30 to 60foot range than aDto 60foot range. This enlarges the targets, allowing the displayto show much more detail.
Drill a hole in thedashfor the power and transducer cables. Thebest locationforthishole is immediately underthe gimbal bracket. This way, the bracket covers the hole. The smallest holeboth the power and transducercablescan passthrough is one inch. However, you can't pass a power or transducer connector and anothercable through

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TherefOre, afterdrilling the hole, passthe transducer connectorup through the holefrom underthe dash. Thendrop the powercable down from the front side of the dash. Slide the bracket over the hole,then routethetransducer and power cables out the slots in the bracket. Finally,fastenthe bracket to the dash. POWER CONNECTIONS

a one inch hole.

IMPORTANT SERVICE INFORMATION!
If yourunit is notworking,orif you needtechnical help, please use the following troubleshooting section before contactinga service centeror the factory customerservice department.Itmaysaveyou thetroubleofreturning yourunit. See
the HowTo Obtain Service section on page 26 if you needservice.
The X-25 works from a 12 volt DC systemonly. For the best results, run the powercable directlyto the boat's battery. Keepthepower cable awayfrom other boat wiring, especially the engine's wires. This will give the best isolation from electrical noise. If thesupplied cable is not longenoughto reach the battery; splice #18 gauge insulated wire to it. You can attachthe power cableto an accessory or powerbuss, however, you may have problems with electrical interference. See page 25 for moreinformation on electrical noise. This unit has reverse polarity protection. No damagewill occur if the powerwires are reversed. However, theunit will not work until the wires are attachedcorrectly.

SONARTROUBLESHOOTING

Unit won't turn on:
Checkthe power cable'sconnection at the unit. Also checkthe wiring.
tothe positivebattery terminal, black to negative orground.

3. Checkthe fuse.

2. Makecertain the power cable is wiredproperly. The red wire connects
4. Measurethebatteryvoltageatthe unit'spowerconnector. It shouldbe atleast volts. If it isn't, thewiring tothe unitisdefective, the batteryterminals orwiring on the terminals are corroded,orthe battery needs charging.
Unit freezes, locks up, or operates erratically:
1. Electrical noise fromtheboat's motor, trollingmotor, oran accessory may be interfering withthesonarunit. Re-routing the power andtransducer cablesaway from otherelectrical wiringon the boat may help. Route the sonarunit'spower cabledirectlyto the battery instead of througha fuse blockor ignition switch

RED WIRE

2. Inspect the transducercable forbreaks,cuts,or pinched wires.
3. Check both the transducerand power connectors. Make certain both are securelyplugged in to the unit

Weak bottom echo, digital readings erratic, or no fish signals:
1. Make certain transducer is pointing straight down. Cleanthe face of the transducer. Oil,dirt, andfuel can cause afilmto formonthe transducer, reducing its effectiveness. If the transduceris mounted inside the hull, be sure it is shooting through onlyone layeroffiberglass andthat itissecurelybonded tothe hull. Do NOT use RN siliconerubberadhesive or Marinetexid.

SPEED! TEMP SENSOR

SURVEYING A LAKE
SPEED/TEMPERATURE SENSORINSTALLATION
(Requires OPTIONALLST-T Speed/TempSensor) Mountthespeed/temp sensoron theboat's transomin a location wheretheflow of wateris the smoothest. Thereshould be a minimum ofturbulenceand air bubbles in the chosen location. The port (left) side of thetransom is preferred, however, thestarboard(right) side can be usedif necessary. Do not mountthe speed sensorbehind strakes, ribs,or thru-hull fittings. These will disturbthe flow of water to the speed sensor. In a typical installation, the speed sensoris mounted six to twelve inches fromthe centerline of the hull. The sensormust always be in the waterto function properly. Makecertain the chosen location is in thewater even at high speed or when the boat is on plane. Once you determine theproper location, placethe sensor on the transom. Makecertain the sensor'sbottom is flush with the bottom of the hull. Mark the transomin four places, two in each slot. Drill a 5/32" mounting hole at each location. Mountthe sensorto the hull with four #10 stainless steel screws (not included). Use a good grade of caulking compound to seal the screws. Adjust the sensorso it is flush with thebottomof the hull and tighten the screws.
The most successful anglers on any body of water are those who fish it day after day and year after year. Eventually, they learn the hot spotsthat produce fish consistently. They discoverthrough experiencewhere, and at what depth,they can expect to find the fish they want at any season. And they realize that these productive areas change throughout the year depending on waterlevel, temperature, food, and other factors. WiththeX-25, anyone can eliminate guesswork and concentrate on the areas where fish are likely to be. Even if it's thefirst time on the
The most efficient way to become acquaintedwith a bodyof water is to surveyit with your X-25. Start with a map of the lake, if possible, and indicate the promising spots in relation to landmarks on shore.
As you go about your survey, your X-25 will tell youthe depth and type of bottom. It will also reveal suspended fish.
Keepa few marker buoys in the boat, ready to toss overboard. When the X-25 indicates a school of fish, throwthe buoyout. With the school thus marked, you can makeyour turn and come back to fish in exactly the right spot. This is essential when you're far from shore on a big lake. Unless you mark the school of fish whenyou're over it, you may not be ableto find it again. BAIT FISH The importance of bait fish to successful fishing can't be over-emphasized. They are the principlefood of all game fish in most waters. Bait fish are theplankton feeding forage fish, such as minnows and 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 wheresunlight promotes the growth of the plankton on which they feed. One method of fishing is to use the X-25tQ find the bait fish first. With the Fish ID feature off, a school of bait fish will look like a "cloud" on the display. Usually, game fish will be nearby, often directlybeneath the school of bait fish.

DISPLAY- General The lights flashfor about ten seconds when the X-25 is turned on. Three menus appear, one afterthe other. The menusare the lights (LAMP), feet-meterselection (FEET/METER), and contrastadjustment (DARK/LIGHT). To turn the lights on, pressthe up arrow key. To switchfrom feet to meters, pressthe down arrow keywhen the proper menu appears. To adjustthe contrast,wait for the DARK/LIGHT menu to appear. Now press the up arrow key to darken the screen, thedown arrow to lighten it. The menus disappearafter a few seconds. If youdon't want to waft, press the ON/CLEAR key to clear the menus from the screen.
When the X-25 is first turned on, the displayappears similarto the one below. The unit is in the automaticmode and the Fish ID feature is on. The depth rangedisplayson the left side of the screen. In this example, the range is from 0 to 60 feet. The digitalbottom depth display shows at thetop left portionof the screen.
getfish symbols whenthe Fish ID. feature is on, try increasing the

sensitivity.

If you seefish signals when the unit is in the manual mode, but don't

'ii-37,3FT

WATER TEMPERATU RE AND THERMOCLINES
Watertemperature has an important-if not controlling-influence upon the activities of all fish. Fish are cold blooded and their bodies are always the temperature of the surrounding water. During the winter, colder waterslows downtheir metabolism. At this tirrie, they need about a fourth as much food as they consume in the summer.
Most fish don't spawn unless the water temperature is within rather narrow limits. The surface temperature meter built intothe X-25 helps identify the desired surface water spawning temperatures for various species. Trout can't survivein streamsthat get too warm. Bass and otherfish eventually die out when stockedin lakes that remaintoo cold during the summer. While some fish havea wider temperature tolerance than others, each has a certain range within which it tries to stay. Schooling fish suspended over deep waterlie at the level that provides this temperature. We assume they are the most comfortable here.
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. If you ever get lost in the menus, simply press the ON/CLEAR key. This clears the menus from the screen,

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.
To turn theautomaticfeatureoff, press the menu key until the AUTO/MANmenu
appears. Now press the down arrow key. 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. In this case, the range is 60 feet. Now pressthe up arrow key to decreasetherange, the down arrow key increases the range. After you selectthedesired range, press the
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.
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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. Remember, the shallowedge of the signal showsyou thetrue depth. The rest of the signal tells you whetheryou are over rocks, mud, etc.
ON/CLEAR key to clear the display. If you wait a few seconds, it will automatically clear. ZOOM
SIGNAL INTERPRETATION YourX-25 gives an accurate picture of the bottomthat your boat is passing. A bottom of firmsand, gravel, shell, or hard clay returns a fairlywide signal. If the automatic mode is off and the signal narrows down, then it means that you have movedovera mud bottom. Mud absorbs the sound wave and returns a weak signal. Turn up the sensitivity to see a betterbottom signal.

Big rocks or stumps on a smooth bottom send back signals above the bottom level signal. The height of the signal dependson the target's height. As you pass over a post, it should be clearly visible as a short line extending above thebottom signal.
The zoom feature enlargesall echoes on the screen. If the unit is in the automatic mode, ittracks the bottom signal, always keeping it near the bottom of the screen. This lets you see small detail, at thesame time enlarging all echoes that appearon the screen. The unit doesn't trackthe bottom in the manual mode, and the adjustments are slightly

different.

Zoom - Automatic Operation
To zoom the display, first press the MENU key until the RANGE/ ZOOM menu appears. Now press thedown arrow key. This switches theunit intothe zoommode. A new menu immediately appears as shownon the right.
A steep slope returns a wide signal, the steeper thewider. Signals returned from a high underwater cliff are usually the widest of all.

31.4FT

t a i if
This is the zoom size menu. Zoom size is the distance betweenthe upper limit and the lower limit. The upper limit shows at thetop left cornerof thescreen. The lower limit is in the bottom left corner. For example, if the upper limit is 40 feet and the lower limit is 70 feet, the zoom window size is 30 feet. The word "TRACK"appears in this menu whenyou first activatethe zoom. This means the X-25 is trackingthe bottom in a zoomwindow,always keeping it on thedisplay.
Press the up arrow key to decreasethe zoom size, press the down arrow key to increase the zoom size.

E 3IAFT

TRANSDUCER CONE ANGLES
Whenthe unit is switchedinto thezoom mode,the tellers "ZM" appearat thetop of the screen. The zoom windowsize displaysin thetop right corner of the

screen.

The sound waves from the transducer spread outintothe water in a cone shaped beam. This looks much like thebeam from a flashlight. The anglebetween theoutside edges of thecone is the cone angle.
Lowrance offers a choice of transducers with either an 8 or 20 degree coneangle. The transducer supplied with the X-25 has a 20 degree cone angle. Typically, wide cone angletransducers (20 degrees) are ideal for operating in shallow to medium water depths. The 20 degree cone angleallows youto see more of theunderwater world. In 15 feet of waterthe 20 degree conecovers an area about six feet across. The 8 degree transducer coversonly about a two foot circle.

To turn thezoom featureoff,press the menu key until the RANGE/ZOOM menu apears. Now presstheup arrow key. This switches theunit into the range mode, whichturns thezoom
featureoff. Zoom - Manual Operation To operatethezoom featurewhen theX-25 is in themanual mode, first pressthe menu key. Then pressthedown arrow key in the RANGE/ZOOM menu to place the X-25 in the zoom mode. The zoom size menu ZM2O automatically appears next. You can changethe zoom size by pressingthe up or down arrows. After you selectthe desired zoom size, pressthe menu key until the "MOVEZOOM" menu appears. This menu lets you movethezoom windowup or down in one foot increments by pressing the arrow keys. Thus, you can move the zoom windowup towards the surface, down to thebottom,or anywhere in between. The window stays ____________________ where you put it. It doesn'ttrack the bottom signal.
The 20 degree transducer is almost always the bestto use in fresh water, the 8 degree mostly in salt water. In a deep water environment, (300feet - fresh water, 100 feet - salt water)the narrow cone angle is more desirable. Since the sound energy is concentrated in a smallerarea, it can penetrate to much deeperdepths.

C 34I4FT

To turn thezoom featureoff, press the menu key until the RANGE/ ZOOM menu appears. Now pressthe up arrow key. This switches the unit intothe rangemode, whichturns thezoomfeatureoff.

20 DEGREE

8 DEGREE
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To chanQe from feet to meters or vice-versa, press the menu key until the FEEt/METER menu appears. Press thedown arrow key to switch to metric, the up arrow to switchto feet. Displays show in feet when the unit is firstturned on. The menu will clear automatically after a few seconds or pressthe ON/CLEAR key to clearthe screen.

SENSITIVITY

The sensitivity menu lets you controlthe unit's abilityto pick up echoes. A low sensitivity level excludes muchof thebottom information, fish signals, and other detail. Nigh sensitivity settingslets you see features, but it can also clutterthe screenwith noise and other unwanted signals. Typically, thebest sensitivity level shows a good, solid bottomsignal with grayline. The X-25 adjusts thesensitivity level to keep a solid bottom signal on thescreen. It adds a little extra when it's in the automatic mode. This gives it thecapabilityto show fish and other detail. However,situationsoccurwhere it becomes necessary to increase or decreasethe sensitivity level. Typically, this occurs when youwish to see more detail, so you need to increasethe sensitivity. The procedureto adjust it is thesamewhethertheunit is in the automatic or manual mode.

DISPLAYCONTRAST The unit's displaycontrastis adjustable to suit differentlighting conditions. Thiswill help you seethe screen from different angles, or at various times of the day. To adjustthe contrast, pressthemenu key
until the DARK/LIGHT menu appears. To decreaseit, press the down arrow key. Press the up arrow key to increase the contrast. The bar graph in the Dark/Light menu boxshows a graph of the contrast. The screen will also show theeffects of the change. If you reach the maximum or minimum level, a tone sounds alerting you to the limits. The menu will clearautomatically after a few secondsor you can presstheON/CLEAR key to clearthe screen.
To changethe sensitivity level, first press the menu key until thesensitivity menu appears. If the unit is in automatic, the
menu shows "AUTOSENS." Otherwise,
the menu shows "MAN SENS." Now pressthe up arrow key to increase the sensitivity, the down arrow to decreaseit. A verticalbar graph in the menu box
showsthe sensitivity level. Echoes scrolling onto the screen wilt also show the effects of the sensitivity change. If you reach the maximum or minimum sensitivity level, a tone sounds alerting you to the

limits.

ASP (Advanced Signal Processing) ASPis a program embedded in the X-25's computer that is specifically designed to
eliminate noise. It continually monitors thesignals fromthe receiver, determines which echoes are noise and rejects them. Thisallowstrue target echoes to display on thescreen with a minimum of clutter. Thisfeature is especially useful since it typically lets you operate the boat at all speeds withoutadjusting the sensitivity or othercontrols. When the X-25 is first turned on, ASP is enabled. To turn ASP off, pressthemenu key repeatedly until the ASP menu appears. Now press the up arrow toturn it on or the downarrow to turn it off. The menu will clear automatically after a few seconds or you can press the ON/CLEAR key to clear the screen.
After you've adjusted theunit to the desired sensitivity level, pressthe ON/CLEAR key to clear the display. If you wait a few seconds, it will
automatically clear. GRAYLINE GRAYLINE lets you distinguish between strongand weak echoes. It "paints" gray on targets that are strongerthan a preset level. This shows the difference between a hard or soft bottom, large fish versus smallerones,or rocks and brush on the bottom. For example, a soft, muddy, or weedy bottom returns a weaker signal which shows a
9 PDF compression,16OCR, web-optimization with CVISION's PdfCompressor
narrow or no gray line. A hard bottom returnsa strong signal that causesa wide gray line. If you havetwo targets of equal size, one with gray and theother without,thetarget with gray is the strongerecho. This helpsdistinguish fish from structure, or the largerfish from a smallerone.

GRAYLINE is adjustable. Since it showsthe differencebetween strong and weak echoes, changingthe level mayrequirea different sensitivity setting.
turnthe alarm Soundoff until the shallowalarm is triggered again.
To turn thealarm off, press the menu key until theshallow alarm menu appears. Thenpress the up arrow key until the word "OFF" appears. The alarm is now off. Deep Alarm The deep alarm adjuststhesameas the shallowalarm. Use the"DEEPALARM" menu to adjustthe deep alarm. When the bottomsignal goes deeperthan the setting, an alarm tone sounds.

to the limits.

To change theGRAYLINE level, first press the MENUkeyuntil the GRAYLINE menu appears. Now pressthe up arrow key to increasethe level, the down arrow to decreaseit. The bar graph in theGRAYLINE menu box showsthe level now in use. Echoes scrolling onto the screen will also showthe effectsof the GRAYLINE change. If you reach the maximum or minimum level, a tone sounds alertingyou
LAMP The X-25's display is backlighted for night use. To turn the backlights on or off, press the menu key repeatedly until the LAMP menu appears. Now press the up arrow to turn the lights on or the down arrow to turn them off. The menu will clearautomaticallyafter a few seconds or you can press theON/CLEAR key to clearthe screen.
The level chosen by theX-25 when it's first turned on is usually adequate for mostconditions. Experiment with your unit to find the GRAYLINE setting that's best.

FISH ID FEATURE

______
The Fish ID feature identifies targets that meet certain conditions as fish. The micro-computer analyses all echoesand eliminates surface clutter, thermoclines, and otherundesirablesignals. In most instances, remaining targets are fish. The Fish ID featuredisplays symbols on the screen in placeofthe actualfish echoes. Thereare four symbolsizes: tiny, small, medium, and large. These showthe relativesize between targets. In other words, it displays a small fish symbolwhen it thinksa target is a small fish, a mediumfish symbolon a larger target, etc. The micro-computer is sophisticated, but it can be fooled. It can't distinguish between fish and other suspended objects such as turtles, submerged floats, air bubbles, etc. Individual tree limbs extending outwards from a groupof limbs are thehardestobjects for the Fish ID

FEET/METER

The X-25 can showthedepth in feet or meters. When the unit is in the metric
mode, all depth readings, ranges, zooms, and alarm settingsare in meters. Speed displaysin knots and log is in nautical miles. Temperature is in degrees Celsius. When it's in the feet mode, all of the above settings are in feet, miles per hour, and statute miles. Temperature shows in degreesFahrenheit. 15

ALARMS

FISH ALARM
featureto distinguish from fish. You maysee Fish ID symbols on the screen when, in fact, there are no fish. Practice with the unit when the Fish ID feature is on and offto becomemore familiarwith Fish ID.
When the X-25 is first turnedon, the Fish ID feature is automatically turned on, also. To turn this feature off, pressthe menu key until the Fish ID feature's menu appears as shown below. Now pressthe down arrow key. Thisturns the featureoff. To turn it backon, repeat the abovesteps, but press the up arrow key instead.
The FishAlarm sounds a tone when a fish symbol appearson the screen. To usethe fish alarm, press the menu key until the "FISH ALARM" menu appears on the screen. Now press the up arrow key to turn the alarm on. Repeat the above steps to turn thefish alarm off. (Note: Ifthe Fish ID feature is off, it will be turnedon when you turn the fish alarm on.)

DEPTH ALARMS

The depth alarms are triggered only by the bottom signal. No other echoes will activate these alarms. The depth alarms consistof a shallowand deep alarm. The shallow alarm sounds an alarm tone when the bottomgoes shallower than the alarm's setting. The deep alarm sounds a tone when the bottom goes deeperthan it's setting. Both alarms adjustthesame, although throughdifferentmenus.
The Fish ID feature can't be used when the X-25 is in the manual mode. If youturn the automatic featureoff, the Fish ID feature will automatically be turned off, also. CHARTSPEED The rate echoes scroll across the screen is calledthechart speed. It's adjustable by pressing the menu key until the chart speed menu ___________________ appears. Chart speed is set to maximum when the X-25 is firstturned on. To decrease it, the down arrow key. __ ac ec Press the press up arrow key to increasethe speed again. 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. 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
arrow key. Press the ON/CLEAR key to remove the shallowalarm menu from the screen. Nowwhen the bottom depth goes shallower than the alarm'ssetting an alarm tone sounds. At the sametime the alarm sounds, a message box appearson the screen as shown at left. Press the up arrow key to silence the alarm. This will
To stopthechart, first clear anymenu fromthe screen by pressing the ON/ CLEAR key. You can't stop the chart while a menu is displayed. Now press theup arrow key. The chart will freeze and the word "STOP" appears at the top right portionof the screen. To start thechart, press the up arrow key again.

________

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DISPLAY MODE The X-25 hassix differentscreen modes. To changemodes, press the MENU key until the "DISP MODE" (DisplayMode) menu appears. Then pressthe up or downarrow keys until the desired mode number appears. The modes are as follows:
CHT 1 (Chart #1) This is the default mode usedwhen the X-25 is firstturned on. It hasthe following
features: 1. Automatic On

DIG 1 (Digital #1)

CHT 4 (Chart #4) This is the High Speed Scroll mode. It shifts the chart speed into high gear, scrolling echoes at a high rate. It hasthe

following features:

1. Automatic Off 2. Fish ID FeatureOff 3. All Digital Displays Off
2. Fish ID FeatureOn 3. Digital Depth Display On
____________ ___________________

DEPTH FT

CHT 2 (Chart #2) Same as Chart#1 plus digital surface watertemperature display(Requires optional LST-T Speed/Temp Sensor.)
This is thefirst digitalonly screen. It showsthe digital depth displayat the top of thescreen in very large numbers. The shallowand deep alarm settings are displayedbeneath the digital depth. No chart showson this screen.

[60.8] I

SHAL ALM

OFT OFT

DEEP ALM

C ZM-20 344FT

CHT 3 (Chart #3) Sameas Chart#1 plus digital speed display.(Requires optional LST-T Speed/ Temp Sensor.)

[38.3] F I

DIG 2 (Digital #2) The digital depth displayshows at the top of this screen in very large digits. The digital temperature, speed, and log shows beneath the depth. (Requires optional LST-T Speed/Temp Sensor.) The log starts countingwhen the X-25 is first turned on. The log is resetto zero when the X-25 is turned off.

76.2 33.2

[SPEED

 

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