Table of Contents
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Table of Contents
Related Manuals for Humminbird DUAL BEAM 250DX
Summary of Contents for Humminbird DUAL BEAM 250DX
- Page 1 Operations Manual...
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Page 2: Thank You
THANK YOU Thank you for choosing Humminbird, America’s #1 name in fishfinders. Humminbird has built its reputation by designing and manufacturing top-quality, thoroughly reliable marine equipment. Your Humminbird 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 - free of charge during the first year after purchase, and available at a reasonable rate after the one-year period. -
Page 3: Table Of Contents
INSTALLATION PREPARATION ..... . . 2 Parts Supplied ......2 Accessories . -
Page 4: Installation Preparation
INSTALLATION PREPARATION PARTS SUPPLIED PARTS SUPPLIED Before installing your 250DX, please ensure the following parts are included in the box: • 250DX fishfinder • Transducer with 6m (20') of cable and mounting hardware kit • Mounting system and mounting hardware kit •... - Page 5 INSTALLATION PREPARATION 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. There are several mounting options for the transducer.
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Page 6: Alternative Transducers And Mounting Methods
INSTALLATION PREPARATION ALTERNATE TRANSDUCERS AND MOUNTING METHODS Inside the hull installations require no holes 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 TRANSDUCER EXCHANGE (which do not conduct sonar signals) make inside the hull mounting inadvisable. Thru-hull mounting may require the use of a fairing block to level the transducer with the waterline. Also, since special tools and knowledge may be required to perform this type of installation it is best to refer to a qualified marine technician. -
Page 8: Using The 250Dx
USING THE 250DX 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: Simulator Operation
USING THE 250DX SIMULATOR OPERATION Actual depth capability depends on factors such as bottom hardness, water conditions, and transducer installation. Units will typically read to deeper depths in fresh water than in salt water. SIMULATOR OPERATION The 250DX contains a simulator that allows you to use the unit as if you are on the water. -
Page 10: What You See On Screen
USING THE 250DX WHAT YOU SEE ON-SCREEN If you are using the 250DX in Simulator when no transducer is connected, any selected options are lost when the unit is powered off. The 250DX will return to Factory Settings, or options selected when last used with a transducer, if no transducer is connected. - Page 11 USING THE 250DX WHAT YOU SEE ON-SCREEN Bottom Depiction Zero Line depth of the water changes, the range changes as necessary in order to retain a bottom representation on-screen. When in Auto mode, the horizontal line at the top of the screen is the “zero line,”...
- Page 12 USING THE 250DX WHAT YOU SEE ON SCREEN distance measurement, so if the boat is moving up and down over flat bottom, the bottom depiction often appears in regular variations that match wave timing. Structure. Structure is defined as any object physically attached to the bottom.
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Page 13: Control Functions
USING THE 250DX CONTROL FUNCTIONS return meets certain additional criteria, a Fish in Wide Beam fish symbol will be assigned. There are three different size fish symbols used to indicate 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... - Page 14 USING THE 250DX CONTROL FUNCTIONS powered off, press and hold POWER for several seconds until a continuous chirp is heard. Light. LIGHT controls the unit’s display backlight. With the unit powered on, press LIGHT once to turn the backlight on “high.” Press LIGHT a second time to turn the backlight on “low,”...
- Page 15 affect the menu adjustment. The ARROW buttons often can be used when no menu is on-screen. In these situations, pressing the ARROW button affects the function of the active (last- used) menu. This is a short-cut to menu operation. The menu appears on-screen while the adjustment is made and times out.
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Page 16: Menu Functions
USING THE 250DX MENU FUNCTIONS Menu Functions Sensitivity. The Sensitivity function controls the sensitivity of the sonar receiver. The 250DX automatically adjusts the level of receiver sensi- tivity based on a number of factors including the depth of the water and the level of noise present. - Page 17 USING THE 250DX MENU FUNCTIONS 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.
- Page 18 USING THE 250DX MENU FUNCTIONS To return to automatic Depth Range control, press the MENU button until the Depth Range menu appears on- screen and use the UP ARROW to select AUTO. Zoom. Zoom is similar to Depth Range because it controls the range of information displayed on screen.
- Page 19 USING THE 250DX MENU FUNCTIONS Automatic Zoom is especially helpful when looking for structure or bottom detail. The Automatic Zoom keeps the bottom in view even in quickly changing terrain, but is most useful in flatter areas without considerable depth variation. Manual Zoom provides detailed information of any area from the surface to the bottom.
- Page 20 USING THE 250DX MENU FUNCTIONS Fish Alarm. The Fish Alarm alerts you to the presence of fish, or other targets not connected to the bottom. The Fish Alarm has three different settings that correspond to the three different size fish symbols shown on-screen. The default setting is “OFF.”...
- Page 21 USING THE 250DX MENU FUNCTIONS the 250DX is operated from a battery source, the voltage number can be used to determine battery life. The 250DX will operate at voltages from 10 to 20 VDC. Voltages in excess of 20 or less than 10 VDC cause the unit to power off.
- Page 22 USING THE 250DX MENU FUNCTIONS Display Speed. Display Speed controls the rate at which the graphic information moves across the display. There are 5 possible speeds; the fastest rate (5) is the factory setting. Keep in mind that the closer the update rate matches your boat speed, the more accurate is the graphic depiction of the terrain beneath your boat.
- Page 23 Fish ID. There are three selections available: OFF, ID+ ON, and ADJUST. The factory setting is ID+ ON. With Fish ID OFF, sonar returns are displayed as “raw” information. There is no interpretation made by the unit. Selecting ID OFF also disables the fish alarm. ID+ ON enables the 250DX to interpret the raw sonar data and, using a variety of techniques, depict appropriate target...
- Page 24 USING THE 250DX MENU FUNCTIONS Numeral Size. Two options are available: BIG and SMALL. The factory setting is BIG. With this setting, the digital depth and speed and temp numerals are drawn large enough to be read from across the boat. The big numerals occupy space on the display that could be used for the graphics area.
- Page 25 USING THE 250DX MENU FUNCTIONS Speed Offset. The Speed Offset option allows the user to compensate for differences in hull design, and its effect on the accuracy of the speed measurement. If there is a discrepancy between the indicated speed and another speed measurement device on the boat, the speed measurement can be varied to improve accuracy.
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Page 26: Advanced Features
ADVANCED FEATURES USING DIAGNOSTIC Reset. With the many User Options available to customize the 250DX, 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 (except Filter) of the 250DX are returned to the factory settings. -
Page 27: Maintenance
Boat Speed/Water Temperature Connection. Other connections tested include the boat speed and surface water temperature sensors. These accessory sensors can be purchased independently or together as a single sensor (see the Humminbird Accessories catalog). If the sensors are connected and working properly, a “connected” message appears. The speed input feature only works when the boat is in motion as the paddle wheel on the speed sensor must rotate to be detected. -
Page 28: Troubleshooting
MAINTENANCE TROUBLESHOOTING mild cleaner. Do not wipe while dirt or grease is on the lens. Be careful to avoid scratching the lens. • If your boat remains in the water for long periods of time, algae and other marine growth can reduce the effectiveness of the transducer. Periodically clean the face of the transducer with liquid detergent. - Page 29 MAINTENANCE TROUBLESHOOTING If the unit is wired through a fuse panel, ensure the panel is powered. Often accessory fuse panels are controlled by a separate switch or the ignition switch. Also, often a fuse can appear to be good when in fact is not. Check the fuse with a tester or replace it with a fuse known to be good.
- Page 30 MAINTENANCE TROUBLESHOOTING If you are using a transducer switch to connect two transducers to the 250DX, 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 31 MAINTENANCE TROUBLESHOOTING 7. My unit loses power at high speeds. Your 250DX 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.
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Page 32: Customer Support
MAINTENANCE CUSTOMER SUPPORT CUSTOMER SUPPORT If you have any problems or questions with your Humminbird unit, contact your local distributor. Humminbird Service Department 108 Maple Lane Eufaula, AL 36027... -
Page 33: Specifications
SPECIFICATIONS Operating Frequency .....200 kHz and 83 kHz Power Output ......250 Watts (RMS) 2000 Watts (Peak to Peak) Area of Coverage . - Page 34 Use with XT series Transducers...
- Page 35 P/N 530975-2...
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