Gebruiksaanwijzing /service van het product X-20A van de fabrikant Lowrance electronic
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X-20A INSTALLATION AND OPERATION INSTRUCTIONS LITHO IN U.S.A. 988-0105-36 •LOWRANCE ELECTRONICS, INC. 12000 E. SKELLY DR., TULSA, OK 74128 PDF compression, OCR, web-optimization with CVISION's .
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26 TABLE OF CONTENTS INTRODUCTION 1 INSTALLATION 1 POWER CONNECTIONS 2 KEYBOARD BASICS 3 OPERATION 5 SENSITIVITY 5 CHART SPEED 7 RANGE 8 ZOOM 8 DIGITAL 9 FISH I.
4. The boat must be moving at aslowtrolling speed toseefish 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 sonar's display as random patterns of dots or lines.
Weak bottom echo, digital readings erratic, or no fish signals (cont4: INTRODUCTION 2. Electrical noisefromthe boat's motorcan interfere wlththe sonar. This causes the sonar to automatically increase its Discrimination or noise rejection feature.
Power Connections The X-20A operates from a 12 volt battery system. Attach the power cable to an accessory or power buss. If you have problems with electrical interference, then attach the cable directly to the battery. Electrical interference shows as random dots on the display whenever the boat's engine or an accessory is on.
thus marked, you can make your turn and come back to fish in exactly _.a1.J the right spot. This is essential when you're far from shore on a big lake. Unless you mark the school of fish when you're over it, you may not be able to find it again.
SENS. This key and the arrow keys adjust the graph's sensitivity. -1 (The digital's sensitivity is adjusted by the unit automati- cally.) The receiver has 32 steps of adjustment. ______ CHART SPEED IUIi'I Vary the speed of the chart with this key and the arrow - keys.
WATER TEMPERATURE AND THERMOCLINES Waler temperature 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 waler. During lhe winter, colder water slows down their metabolisrri.
With high sensitivity settings, a second bottom echo (second echo) may appear. This is normal. It's caused by the returning signal reflecting off the surface of the water.
Both 8 degree and 20 degree transducers give accurate bottom read- ings, even though the bottom signal is much wider on the 20 degree model. This is because you are seeing more of the bottom. Remem- ber, the shallow edge of the signal shows you the true depth.
RANGE TRANSDUCERS AND CONE ANGLES The range automatically changes to keep the bottom signal on the display when the unit is in automatic. The range cannot be changed when the unit is in the automatic mode. The range can be changed in manual mode. There are six ranges available: 0-5, 15, 30, 60, 120, and 180 feet.
MODE 5 - All chart, High Speed Scroll. In this mode the chart scrolls at high speed. The chart speed can be adjusted with the CHART SPEED key if desired. a) Chart uses full screen. b) No digital depth indicator. c) No FASTRAK. d) No automatic operation al- lowed.
FISH I.D. The Fish 1.0. feature is automatically on when the unit is first turned on. The computer inside the unit analyzes all echoes, filtering out unwanted signals. It helps eliminate surface clutter, thermoclines, and other un- desirable signals. The remaining suspended targets are usually fish.
The X-20A has five different screen modes. To change modes, press the MODE key. Keep pressing the MODE key until the desired screen appears. A summary 01 the different screen modes follows. MODE 1 - This is the de- fault mode used when the unit is first turned on.
CHART ALARM To set the Chart Alarm, press the CHART ALARM key on the keyboard. The words " Chart Alarm" flashes in the lower right corner of the screen. A vertical bar also displays on the left side of the screen. It will stay on the screen for eight seconds or for eight seconds after you have finished adjusting it.
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