User manual HUMMINBIRD LCR 3004

[. . . ] TRANSDUCER MOUNTING PROCEDURE Humminbird's high-speed transducer is supplied with your LCR. This transducer has been designed to give good high speed readings on most all boat designs, including aluminum. Please carefully consider the following before installing your transducer. TRANSDUCER MOUNTING OPTIONS A. Transom Mount- The Humminbird high speed transducer allows the transducer element to be mounted below the bottom of the boat hull keeping the transducer out of turbulent water and insuring good high speed operation. [. . . ] The depth range is always displayed at the bottom of the LCR display. The LCR 3004 has four depth ranges, 0-15; 0-30, ' 0-60; and 0-120: The graduated depth scales down the left and right side of the display will identify the proper depth based upon the range you are on at the time. On the 0-15' scale, each line represents a one foot increment. On the 0-30' scale a two foot increment, on the 0-60' scale, a five foot increment and on the 0-120' scale, a ten foot increment. Sensitivity: Automatic Mode - Each time the unit is turned on, the automatic feature is on. In the automatic mode the sensitivity is adjusted automatically to give a good return and the correct depth range is selected. The word Auto will appear in the upper right hand corner of the display any time the unit is in the automatic mode. The sensitivity bar at the top of the screen will increase ordecrease automatically indicating the amount of sensitivity being used. In deeperwaterthis barwill increase indicating more sensitivity. In shallow waterthe sensitivity needed to achieve a good return will be less. Also in the automatic mode, the unit will blackout the display beneath the bottom line. Manual Mode - There are two ways of putting the LCR 3004 in the manual mode: (1) depress the Auto "On/Off" button or (2) depress either the manual decrease (-) or increase (+) button. You will notice that the word "Auto" in the upper right hand corner of the display has gone off. The operator can control the amount of sensitivity by depressing the (+) or (-) button. When the (+) or (-) button is pressed once, the sensitivity setting at the top of the screen will change by one division. If the (+) or (-) button is held down the setting will move up or down as long as the button is held down. When the maximum or minimum setting is achieved, the unit will make a "Chirping" sound indicating a limit has been reached. In the manual mode everything below the bottom is no longer blacked out, therefore a second return or double echo can be displayed if desired. Also, the hardness of the bottom can be determined by the thickness of the bottom return. For example, a hard or rock bottom will give a wider bottom return as compared to a soft or muddy bottom. (See Figure 14). Note: You will find the manual sensitivity control most useful when looking for smaller targets such as smaller fish. In the automatic mode the computer might not be using enough sensitivity to show smaller targets. At higher sensitivity settings more targets will be seen. [. . . ] The automatic depth change works only in the automatic mode. Push the Auto On/Off button to go back to the automatic mode. Step 5: Press the alarm on/off button to turn on the bottom alarm. Next press the range down (s) button until the alarm setting is lower than the bottom reading. [. . . ]