Humminbird 425 SX Operation Manual
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Humminbird 425 SX Operation Manual

Humminbird 425 SX Operation Manual

Humminbird fish finder operations manual
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OPERATIONS
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Summary of Contents for Humminbird 425 SX

  • Page 1 OPERATIONS MANUAL...

  • Page 2: Thank You

    RELIABLE MARINE EQUIPMENT. YOUR HUMMINBIRD PRODUCT IS DESIGNED FOR TROUBLE-FREE USE IN EVEN THE HARSHEST MARINE ENVIRONMENT. IN THE UNLIKELY EVENT THAT YOUR HUMMINBIRD DOES REQUIRE REPAIRS, WE OFFER AN EXCLUSIVE SERVICE GUARANTEE. COMPLETE DETAILS ARE INCLUDED AT THE END OF THIS MANUAL.

  • Page 3: Table Of Contents

    Section 1: Installation preparation ....2 Parts Supplied ......2 Accessories .

  • Page 4: Section 1: Installation Preparation

    If any of these items are missing contact your local dealer. ACCESSORIES Humminbird offers a wide assortment of accessories that complement and expand the capability of your new 425SX. These accessories are designed with the same high standards. The Humminbird Accessory catalog included with your unit contains descriptions of the many accessories available and ordering information.

  • Page 5: Installation Preparation

    INSTALLATION PREPARATION The transducer converts electrical energy from the transmitter into mechanical pulses or sound waves. The transducer also receives the reflected sound waves and converts them back into electrical signals for display on the control head. It should be installed in contact with the surface of the water in an area that has smooth water flow - usually on the transom of the boat.

  • Page 6: Alternative Transducers And Mounting Methods

    INSTALLATION PREPARATION ALTERNATE TRANSDUCERS AND MOUNTING METHODS signal from passing through. Inside the hull installations require no holes to be drilled into the boat and through experimentation, high-speed operation comparable to transom mounting can be achieved. Two part, slow cure epoxy is required to glue the transducer in place.

  • Page 7: Beginning Installation

    INSTALLATION PREPARATION BEGINNING INSTALLATION Now that you have determined the transducer mounting method, you can begin installation of the 425SX. The fold out installation guide included provides detailed step by step instructions for installation of the control head and transducer. For transom mount transducer installations, you will need the mounting template at the back of this manual.

  • Page 8: Section 2: Using The 425Sx

    USING THE 425SX HOW SONAR WORKS HOW SONAR WORKS Your Humminbird unit uses sonar to locate and define underwater objects, define the bottom terrain, as well as determine distance. Sonar technology is based on sound waves. Your Humminbird unit sends out a sound wave signal.
  • Page 9 USING THE 425SX SIMULATOR OPERATION The simulator can also be started by selecting the Simulator option on the start-up screen after you power-up the unit. When this screen is shown, simply press the DOWN ARROW until “Simulator” is highlighted. When the screen times out, the unit will be in simulator mode.

  • Page 10: What You See On Screen

    USING THE 425SX WHAT YOU SEE ON-SCREEN At initial power-up, the 425SX uses settings that were set at the factory. After initial use, the 425SX will remember the settings you enter. There are several elements on-screen that are common to all modes of operation.
  • Page 11 USING THE 425SX WHAT YOU SEE ON-SCREEN When in Auto mode, the horizontal line at the top of the screen is the “zero line,” representing the surface of the water. Occasionally there is a gap in this line. This gap indicates the unit is updating the display even if the bottom is not visible on-screen, or if the bottom information is not changing.
  • Page 12 USING THE 425SX WHAT YOU SEE ON SCREEN depiction of these objects varies with boat speed and direction. The best way to learn to interpret structure is to operate the 425SX over a variety of known conditions and experiment with user functions to best represent those conditions on-screen.
  • Page 13 USING THE 425SX WHAT YOU SEE ON SCREEN speed and movement of the fish greatly affect the shape of the arch. When moving slowly, a fish creates an elongated arch. With the boat moving fast the arch appears shorter. A partial arch forms when the fish does not move through the entire cone angle.

  • Page 14: Control Functions

    USING THE 425SX CONTROL FUNCTIONS the intensity of the sonar return. While signal intensity is a good indicator of relative fish size, different species of fish have different sonar characteristics, so it is not always possible to distinguish fish size between varying species. The signal intensity is "normalized"...
  • Page 15 USING THE 425SX CONTROL FUNCTIONS When powering the unit from a battery such as in portable applications, you can prolong the battery life by using the backlight at a minimum. The three lower buttons, MENU, UP ARROW and DOWN ARROW work together to control the 425SX menu-controlled user functions.
  • Page 16 USING THE 425SX CONTROL FUNCTIONS Chart View The Chart View, shows only the digital depth readout, leaving more screen area for fish location and bottom depiction. Menu. MENU displays a menu on-screen for adjustment. In normal operation, pressing MENU repeatedly cycles through all available menus.

  • Page 17: Menu Functions

    After an adjustment is made to a menu function, the menu times out after a few seconds and the unit returns to normal operation. Menu Layout. All menus use the same basic layout. The heading at the top describes the menu function. The UP ARROW and DOWN ARROW symbols to the left of the menu indicate which buttons are available for adjustment.
  • Page 18 USING THE 425SX MENU FUNCTIONS The user has the option of High Sensitivity Sensitivity at “0” adjusting the Sensitivity higher or lower based on personal preference. You can select one of 11 sensitivity settings from - 5 to +5. A setting of 0 (factory setting) has no effect on the automatic sensitivity control.
  • Page 19 USING THE 425SX MENU FUNCTIONS The range that positions the bottom depiction closest to the bottom of the screen, will best utilize the available display resolution. Using the factory setting of AUTO the 425SX can automatically adjust the depth range depending on the depth of the water.
  • Page 20 USING THE 425SX MENU FUNCTIONS Zoom. The 425SX uses a greatly enhanced Zoom capability called “TruZoom” which offers expanded information on a select area of sonar information. Zoom is similar to Depth Range because it controls the range of information displayed on screen. Zoom, however, allows for selection of ranges beneath the surface so any area of water between the surface and the bottom can be enlarged to provide more detailed information.
  • Page 21 USING THE 425SX MENU FUNCTIONS Upper Zoom Limit In “Manual” Zoom, the Zoom range does not move as the terrain changes. To operate Zoom, press MENU repeatedly until the Zoom menu is on- screen. Three options available: “Off” (Factory Setting), “Auto”...
  • Page 22 USING THE 425SX MENU FUNCTIONS then intermittently to remind you that you are still in shallow water. Additionally, the 425SX can anticipate quickly changing terrain and sound the Depth Alarm before the bottom depth actually reaches the preset alarm depth. Fish Alarm.
  • Page 23 Triplog provides four pieces of information: the total time elapsed since power-up or reset, the distance traveled since the 425SX was powered up or reset, the average speed, and the input voltage from your boat’s electrical system. The time, speed and distance calculations are useful for tracking your progress on a trip.
  • Page 24 USING THE 425SX MENU FUNCTIONS Contrast. The Contrast function allows the user to control the level of contrast of the LCD display. The 425SX will automatically adjust the display contrast to compensate for changing ambient temperatures; however, some situations may occur where manual adjustment will provide a higher level of contrast.
  • Page 25 USING THE 425SX MENU FUNCTIONS When the voltage drops below your selected voltage, an audible alarm will sound, and a battery alarm icon will be displayed on screen with current voltage level. Bottom Black. There are two selections available: Off and On. The factory setting is Off.
  • Page 26 USING THE 425SX MENU FUNCTIONS Selecting Adjust and making incremental changes enhances the fishfinder’s ability to identify sonar returns as fish symbols. Increasing the value to a number greater than zero shows more fish symbols on-screen. In this case smaller sonar returns will be depicted as fish symbols.

  • Page 27: Section 3: Advanced Features

    ADVANCED FEATURES USING DIAGNOSTIC accuracy. Remember, the speed paddle wheel measures speed through the water, not speed over ground. Speed offset is remembered after power is disconnected. Depth Offset. The Depth Offset allows the user to select the point on the boat from which the depth measurement is made.

  • Page 28: Advanced Features

    ADVANCED FEATURES USING DIAGNOSTIC Self Test. Initially, the 425SX will perform a self-test. This test confirms the operation of all internal circuitry. At the conclusion of the test, one of two messages will appear. PASSED indicates the internal test discovered no failures, FAILED indicates a significant internal problem was discovered and the unit requires factory service.

  • Page 29: Section 5: Maintenance

    Repairs should be performed only by authorized Humminbird technicians. Many requests for repair received by Humminbird involve units that do not actually need repair. These units are returned “no problem found.” If you have a problem with your 425SX, use the following troubleshooting guide before calling your dealer or sending your unit in for repair.

  • Page 30: Troubleshooting

    ADVANCED FEATURES TROUBLESHOOTING 1. Nothing happens when I turn the unit on. Check the power cable connection at both ends. Be sure the cable is connected correctly to a reliable power source—red lead to positive, black lead to negative or ground. Ensure the power available at the mount is between 10 and 20 VDC. If the unit is wired through a fuse panel, ensure the panel is powered.
  • Page 31 ADVANCED FEATURES TROUBLESHOOTING If you are using a transducer switch to connect two transducers to the 425SX, ensure the switch is in the correct position to connect a transducer that is in water. (If a trolling motor transducer is selected and the trolling motor is out of water, no sonar information appears.) If none of the above solve the problem, inspect the transducer cable from end to end for breaks, kinks, or cuts in the outer casing of the cable.
  • Page 32 Ensure that the transducer is mounted at least 38cm (15") from the prop. For Service and/or repair of your 425SX please contact your local dealer. Further information on HUMMINBIRD products can be found at: www.humminbird.com...

  • Page 33: Specifications

    Languages supported: Danish, Dutch, English, Finnish, French, German, Hungarian, Italian, Norwegian, Polish, Portuguese, Spanish and Swedish. Operating Frequency ......200 kHz Power Output .
  • Page 35 Use this template with transducer mounting bracket 403606...

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