Hummingbird Communications FISHFINDER 425SX Manuel d'utilisateur Page 1

OPERATIONSMANUAL

At initial power-up, the 425SX uses settings that were set at the factory. Afterinitial use, the 425SX will remember the settings you enter. There are

When in Auto mode, the horizontal line at the top of the screen is the “zeroline,” representing the surface of the water. Occasionally there is a gap

depiction of these objects varies with boat speed and direction. The best way tolearn to interpret structure is to operate the 425SX over a variety of

speed and movement of the fish greatly affectthe shape of the arch. When moving slowly, afish creates an elongated arch. With the boatmoving fast the

the intensity of the sonar return. While signal intensity is a good indicator ofrelative fish size, different species of fish have different sonar cha

When powering the unit from a battery such as in portableapplications, you can prolong the battery life by using thebacklight at a minimum.The three l

The Chart View, shows only thedigital depth readout, leavingmore screen area for fishlocation and bottom depiction. Menu. MENU displays a menuon-scree

After an adjustment is made to a menu function, the menu times out after a fewseconds and the unit returns to normal operation. Menu Layout. All menus

The user has the option ofadjusting the Sensitivity higheror lower based on personalpreference. You can select oneof 11 sensitivity settings from -5 t

The range that positions the bottom depictionclosest to the bottom of the screen, will best utilizethe available display resolution.Using the factory

THANK YOU FOR CHOOSING YOUR 425SX FISHFINDER, MADE BYTECHSONIC INDUSTRIES, MANUFACTURER OF AMERICA’S #1 NAME INFISHFINDERS, HUMMINBIRD. HUMMINBIRD HAS

Zoom. The 425SX uses a greatly enhanced Zoomcapability called “TruZoom” which offers expandedinformation on a select area of sonar information.Zoom i

In “Manual” Zoom, the Zoomrange does not move as theterrain changes. To operateZoom, press MENU repeatedlyuntil the Zoom menu is on-screen. Three opti

then intermittently to remind you that you are still in shallow water. Additionally,the 425SX can anticipate quickly changing terrain and sound the De

Triplog provides four pieces ofinformation: the total timeelapsed since power-up orreset, the distance traveledsince the 425SX was poweredup or reset,

Contrast. The Contrast function allows the user tocontrol the level of contrast of the LCD display. The425SX will automatically adjust the display con

When the voltage drops below your selected voltage, an audible alarm willsound, and a battery alarm icon will bedisplayed on screen with current volta

Selecting Adjust and making incremental changesenhances the fishfinder’s ability to identify sonar returnsas fish symbols.Increasing the value to a nu

ADVANCED FEATURESUSING DIAGNOSTICaccuracy. Remember, the speed paddle wheel measures speed through thewater, not speed over ground.Speed offset is rem

26Self Test. Initially, the 425SX will perform a self-test. This test confirms theoperation of all internal circuitry. At the conclusion of the test,

ADVANCED FEATURESMAINTENANCE/TROUBLESHOOTINGMAINTENANCEYour 425SX is designed to provide years of trouble free operation with virtually nomaintenance.

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

281. Nothing happens when I turn the unit on.Check the power cable connection at both ends. Be sure the cable is connectedcorrectly to a reliable powe

29If 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 th

30ADVANCED FEATURESTROUBLESHOOTING7. My unit loses power at high speeds.Your 425SX has over-voltage protection that turns the unit off when input volt

31Languages supported: Danish, Dutch, English, Finnish, French,German, Hungarian, Italian, Norwegian, Polish, Portuguese,Spanish and Swedish.Operating

Remove and use forTransducer InstallationDO NOT LET DEADRISEINTERSECT THIS LINEPLACE EITHER CORNERON DEADRISE ANGLETOPUse ⁵⁄₃₂" (4.0mm) drill bit

2INSTALLATION PREPARATIONPARTS SUPPLIEDPARTS SUPPLIEDBefore installing your 425SX, please ensure the following parts are included inthe box:• 425SX fi

3INSTALLATION PREPARATIONINSTALLATION OVERVIEWThe transducer converts electrical energy from the transmitter into mechanicalpulses or sound waves. The

4signal from passing through.Inside the hull installations require no holes to be drilled into the boat andthrough experimentation, high-speed operati

BEGINNING INSTALLATIONNow that you have determined the transducer mounting method, you canbegin installation of the 425SX. The fold out installation g

USING THE 425SXHOW SONAR WORKS6HOW SONAR WORKSYour Humminbird unit uses sonar tolocate and define underwater objects,define the bottom terrain, as wel

7USING THE 425SXSIMULATOR OPERATIONThe simulator can also be started by selectingthe Simulator option on the start-up screenafter you power-up the uni