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Hummingbird Communications 425SX Operation Manual

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OPERATIONS
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  • Page 1 www.reelschematic.com www.reelschematic.com OPERATIONS MANUAL...

  • Page 2: Thank You

    THANK YOU THANK YOU FOR CHOOSING YOUR 425SX FISHFINDER, MADE BY TECHSONIC INDUSTRIES, MANUFACTURER OF AMERICA’S #1 NAME IN FISHFINDERS, HUMMINBIRD. HUMMINBIRD HAS BUILT ITS REPUTATION BY DESIGNING AND MANUFACTURING TOP QUALITY, THOROUGHLY RELIABLE MARINE EQUIPMENT. YOUR HUMMINBIRD PRODUCT IS DESIGNED FOR TROUBLE-FREE USE IN EVEN THE HARSHEST MARINE ENVIRONMENT.

  • Page 3: Table Of Contents

    Beginning Installation ......5 Section 2: USING THE 425SX..... . . 6 How Sonar Works .

  • Page 4: Section 1: Installation Preparation

    All Humminbird accessories are available through your full-service Humminbird dealer. INSTALLATION OVERVIEW The 425SX consists of two primary components to install: the control head and the transducer. The control head contains the sonar transmit and receive circuitry, as well as the user controls and display.

  • Page 5: Installation Preparation

    Determining How to Mount the Transducer The 425SX includes a model XT-6-24 transducer. This transducer can be mounted on the transom of the boat, or bonded to the inside of a fiberglass hull boat.

  • Page 6: Alternative Transducers And Mounting Methods

    ALTERNATE TRANSDUCERS AND MOUNTING METHODS The 425SX comes with everything necessary for installation and operation on most boats. However, there are several situations which may require a different type of transducer. Inboard boats, wood or metal hulls, and sail boats create unique transducer mounting needs.

  • Page 7: Beginning Installation

    • Silicone sealant (for sealing drilled holes) • 2-part, slow-cure epoxy (for inside the hull transducer installations) Note: If you have purchased the 425SX + you will have in addition to the parts and instructions above: • Speed and Temperature sensors •...

  • Page 8: Section 2: Using The 425Sx

    SIMULATOR OPERATION The 425SX contains a simulator that allows you to use the unit as if you are on the water. The simulator is invaluable for learning how to operate the 425SX.
  • Page 9 When the screen times out, the unit will be in simulator mode. When in simulator operation, the 425SX responds to control inputs as if it is in actual operation, so feel free to experiment, or to customize the unit for your particular operation.

  • 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 New sonar information appears on the right side of the graphic area of the display and moves to the left as new information is displayed. The 425SX automatically selects the appropriate depth range to show the depth of water beneath the transducer.
  • Page 12 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 The 425SX is also capable of showing layers of water having different temperatures. These temperature differences, called thermoclines, appear at different depths, depending on current conditions.

  • Page 14: Control Functions

    CONTROL FUNCTIONS The 425SX uses a simple six button keypad for all user input. Press any button and an audible “chirp” confirms the control input. If a button has no function or is inappropriate for the situation, an audible “error” is heard. The unit sounds multiple chirps.
  • Page 15 The three lower buttons, MENU, UP ARROW and DOWN ARROW work together to control the 425SX menu-controlled user functions. 2D View View. VIEW selects one of several screen configurations or “views”...
  • 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...

  • Page 17: Menu Functions

    Range of Adjustment Indicator Sensitivity. The Sensitivity function controls the sensitivity of the sonar receiver. The 425SX automatically adjusts the level of receiver sensitivity based on a number of factors including the depth of the water and the level of noise present.
  • 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 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. The unit tries to maintain the bottom depiction about ²⁄₃...
  • 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,...
  • Page 21 Off, and let the menu time out. When the unit is powered off, the Zoom menu returns to Zoom Off. Depth Alarm. The 425SX contains an audible alarm to warn you of shallow water depths. The alarm is adjustable to depths of .6m (2') to 30m (99').
  • Page 22 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. The Fish Alarm alerts you to the presence of fish, or other targets not connected to the bottom.
  • Page 23 The input voltage is useful for determining the condition of the charging system of the boat. When used in a portable application or whenever the 425SX is operated from a battery source, the voltage number can be used to determine battery life. The 425SX will operate at voltages from 10 to 20 VDC.
  • Page 24 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 There is no interpretation made by the unit. Selecting ID ON also enables the fish alarm. ID+ On enables the 425SX to interpret the raw sonar data and, using a variety of techniques, depict appropriate target returns as one of three different size fish symbols.
  • Page 26 In this case smaller sonar returns are disregarded. This is useful for eliminating many small sonar returns when seeking larger species of fish. The 425SX remembers this selection even when the unit is powered off. Numeral Size. Two options are available: Big and Small.

  • Page 27: Section 3: Advanced Features

    Depth offset is remembered after power is disconnected. Reset. With the many User Options available to customize the 425SX, it is easy to configure the unit in such a way that it is detrimental to a particular use. By using the Reset function, all variable or user-controlled features of the 425SX are returned to the factory settings.

  • Page 28: Advanced Features

    Use Diagnostic while running the boat at high speeds to show the voltage gain. Also, if you are using the 425SX in portable configuration or from the trolling motor battery, Diagnostic can be used to evaluate the health of the battery by showing the present voltage.

  • Page 29: Section 5: Maintenance

    ADVANCED FEATURES MAINTENANCE/TROUBLESHOOTING MAINTENANCE Your 425SX is designed to provide years of trouble free operation with virtually no maintenance. Follow these simple procedures to ensure your 425SX continues to deliver top performance. • If the unit comes into contact with salt spray, simply wipe the affected surfaces with a cloth dampened in fresh water.

  • Page 30: Troubleshooting

    Check the power connection to the 425SX. It is possible to force the power cable connector into the cable holder incorrectly. If the connector is reversed, the unit will not work.
  • Page 31 4. When in very shallow water, I get gaps in the bottom reading and inconsistent digital depth indication. The 425SX will work reliably in water .6m (2') or deeper. The depth is measured from the transducer, not necessarily from the surface.
  • Page 32 TROUBLESHOOTING 7. My unit loses power at high speeds. Your 425SX has over-voltage protection that turns the unit off when input voltage exceeds 20 VDC. Some outboard motors do not effectively regulate the power output of the engine’s alternator and can produce voltage in excess of 20 volts when running at high RPMs.

  • Page 33: Specifications

    www.reelschematic.com www.reelschematic.com SPECIFICATIONS Languages supported: Danish, Dutch, English, Finnish, French, German, Hungarian, Italian, Norwegian, Polish, Portuguese, Spanish and Swedish. Operating Frequency ......200 kHz Power Output .
  • Page 34 www.reelschematic.com www.reelschematic.com...
  • Page 35 www.reelschematic.com www.reelschematic.com Use this template with transducer mounting bracket 403606...
  • Page 36 www.reelschematic.com www.reelschematic.com...

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