Humminbird 425 SX manual High Sensitivity Sensitivity at Low Sensitivity

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USING THE 425SX

MENU FUNCTIONS

The user has the option of 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. Increasing the sensitivity (+1 through +5) enables the unit to display the information from progressively smaller sonar returns. By decreasing the sensitivity (-1 through -5), the unit effectively filters small sonar returns.

High Sensitivity Sensitivity at “0”

Low Sensitivity

In murky or muddy water, it is often helpful to reduce the sensitivity. This prevents the display from being cluttered with sonar returns from debris or suspended particles. In very clear or very deep water, it may be helpful to increase the sensitivity since even the smallest sonar return may be of interest to the user.

To adjust Sensitivity, press MENU repeatedly until the Sensitivity heading is displayed. When the Sensitivity menu appears, use the UP ARROW to increase the sensitivity, or the DOWN ARROW to reduce sensitivity. To sequence through the available settings, press and hold either ARROW button. Release the button at the setting you want to select.

After an adjustment is made, the menu disappears and the new sensitivity setting is in affect. If additional time is needed to study a menu, press and hold the MENU button and the menu will remain on-screen indefinitely. If you need to make an additional adjustment, press the UP ARROW or DOWN ARROW button.

Depth Range. The Depth Range function controls the vertical distance displayed on the graphic area of the display. There are nine depth ranges available. The top of the range is always 0, or the surface of the water. Ranges of 0–5, 0–10, 0–20, 0–40, 0–60, 0–80, 0–110, 0–150, and 0–185 metres and imperial ranges of 0–15', 0–30', 0–60', 0–120', 0–180', 0–240', 0–360', 0–480', and 0–600'.

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Contents Operations Manual Thank YOU Table of Contents Installation Overview Installation PreparationAccessories Parts SuppliedInstallation Overview Determining How to Mount TransducerPortable Mounting Alternate Transducers and Mounting MethodsAlternate Transducers and Mounting Methods Trolling Motor MountingBeginning Installation Beginning InstallationHOW Sonar Works Using the 425SXHOW Sonar Works Simulator OperationFeature Memory Simulator OperationWhat You See On-Screen What YOU see ON-SCREEN Figure aSurface Clutter Rocky Bottom Hard Bottom Soft Bottom Second Returns. When a What YOU see on ScreenID+ Fish Depth Control Functions Control FunctionsLarge Digit View Keys. If no adjustment is made in the allotted To bring up the last menu usedAbbreviated Menu. The Arrow buttons often can be Menu Functions Menu FunctionsHigh Sensitivity Sensitivity at Low Sensitivity Depth Range Surface so any area of water between the surface Using the 425SX Using the 425SX For Tracking your Input voltage fromCalculations Are On aAlarm menu under options, you will note that Bottom Black View ID+ On Raw Sonar Using the 425SX Depth offset is remembered after power is disconnected Advanced FeaturesUsing Diagnostic Using the Diagnostic FeatureAdvanced Features MAINTENANCE/TROUBLESHOOTING MaintenanceTroubleshooting There is no transducer detected TroubleshootingNothing happens when I turn the unit on There is no bottom reading visible on the displayUnit comes on before I press POWER, and won’t turn off Get gaps in the reading at high speedsMy unit loses power at high speeds Further information on Humminbird products can be found atSpecifications Page TOP Use this template with transducer mounting bracket

425 SX specifications

The Humminbird 425 SX is a sonar fish finder that combines advanced technology and user-friendly features to enhance the fishing experience. This device is ideal for anglers seeking reliable performance without compromising quality or functionality. With its robust design and cutting-edge features, the 425 SX has become a favorite among both novice and experienced fishermen.

One of the main features of the Humminbird 425 SX is its DualBeam Plus sonar technology. This innovative system allows users to switch between two sonar beams: a wider beam for searching large areas and a narrower beam for a more detailed view of the underwater structure and fish. With a depth capability of up to 600 feet, anglers can easily track fish and structures below the surface, ensuring no opportunities are missed.

The 425 SX is equipped with a high-resolution display, making it easier to read data in various lighting conditions. This 4.5-inch LCD screen provides clear and vibrant visuals, allowing users to interpret information quickly and accurately. The display also features a customizable color palette, letting anglers tailor the screen to their preferences for maximum visibility.

Another noteworthy characteristic of the Humminbird 425 SX is its fish identification feature. The device can recognize and differentiate fish species based on their size and depth, giving users valuable insights into what they might catch. This feature not only enhances the fishing experience but also helps in making informed decisions on bait and tackle.

The device also supports a range of advanced features, such as a built-in GPS system that allows users to mark waypoints for their favorite fishing spots, track their movements on the water, and navigate safely. The GPS functionality ensures that anglers can easily return to productive fishing locations, making the most of their time on the water.

Moreover, the Humminbird 425 SX’s durable construction ensures it can withstand the rigors of both freshwater and saltwater environments. Its waterproof design provides added peace of mind, protecting the device from potential damage caused by splashes or rain.

In conclusion, the Humminbird 425 SX is a versatile and user-friendly fish finder that offers invaluable features for anglers of all skill levels. With its DualBeam Plus sonar technology, high-resolution display, fish identification capabilities, built-in GPS, and durable design, this device proves to be an essential tool for anyone looking to enhance their fishing success. Whether you're out for a casual day on the water or targeting specific species, the Humminbird 425 SX will help you make the most of your fishing adventures.
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