User manual HAWKEYE DF51

[. . . ] Inside the battery compartment you will see a small slide switch (fig 1. ), using a small screwdriver or similar instrument slide the switch to the left for readings in feet and Fahrenheit and to the right for readings in meters and Celsius Fig. 1 Using the DF51 Obtaining Depth Readings (see also instructions for readings through ice or a boat hull) 1. Put the transducer end (the wide end) in the water making sure to point it directly to the bottom for an accurate depth reading and flick the switch letting go of the switch immediately. Fig. [. . . ] Be careful - if you think the object is hotter than 50ºC do not press the transducer against it as you could end up damaging the electronics 3. You need to be sure there are no air pockets between the transducer and the ice otherwise the unit will not give a reading. If the unit is not working properly remove it and try to position it again. To remove the DF51 tap it gently with the base of your hand - never strike it with an object since this could easily damage the sensitive electronics inside 5 6 Using the DF51 through a boat hull The DF51's advanced electronics allow it to take readings through the hull of a boat or canoe. To be effective, the hull must be made of solid fiber glass or aluminum a maximum 1/8" thick. Again, as with ice, if there are any air pockets the DF51 will not work properly. To take a reading through the hull Place the transducer in 0. 5" of water or coat the end of the transducer in petroleum jelly and press against the hull or place in a plastic bag full of water and place the bag on the bottom of the boat (fig. 6 Scanning for depth changes or fish As well as using to scan vertically the DF51 can be used to scan sideways as a depth finder and fish finder to search for drop-off's and hiding fish, to do so 1. Once you have a correct reading, scan by moving the unit around horizontally (just like using a flashlight). Remember, the sonar will only work if it hits solid objects within the range of the unit (120 ft) (a) (b) (c ) 7 8 Using the DF51 for diving The DF51 is waterproof and pressure rated to 3 bar or 30m/100ft making it an ideal range finder for snorkeling or diving. Once again, the unit must be directed at solid objects within 120 ft to give a reading. Also, always attach a wrist strap when using for diving or snorkeling otherwise you may loose the unit ! Looking after your DF51 1. When storing - keep in a cool dry place - never leave in temperatures over 120ºF 50ºC otherwise the components could be damaged - to maintain the activation switch coat is regularly with a non-water based lubricant such as WD-40 or Vaseline to protect from moisture - keep the battery cap or ring lubricated to maintain seal integrity (fig. 7 Lubricate Here 9 10 Trouble Shooting You must never try to repair the unit yourself - the components are very sensitive and non-serviceable 1. When I flick the switch nothing happens Make sure the batteries are installed correctly and are fresh - test them on another product to make sure they work 2. If you are attempting to take reading outside the operating range - 2. 5 to 120 ft (1 to 36m) - you will not get a reading - remember, you must point the unit perpendicularly to the surface you want to measure to get a correct reading - sonar waves travel in straight lines. [. . . ] If you drop it in the water it will not sink and if you let go of it when you are diving it will float to the surface make sure it is attached to you via a lanyard when diving to avoid loosing it 3. I'm not getting a reading through the boat hull or ice Air pockets, even tiny ones, in the ice or hull and any hull material other than solid fiber glass or aluminum less than 1/8" thick will not allow you to take a correct reading 4. 8 DEPTH Ft (M) 10 (3. 1) 20 (6. 1) 30 (9. 1) 40 (12. 2) 50 (15. 2) 60 (18. 3) 70 (21. 3) 75 (23) COVERAGE AREA Ft (M) 3. 5 (1) 7. 1 (2. 2) 10. 6 (3. 2) 14. 4 (4. 3) 17. 6 (5. 4) 21. 2 (6. 5) 24. 7 (7. 5) 26. 5 (8) COVERAGE AREA Specifications Unit Dimensions Display type Power requirements Units of measure Depth range Pressure/depth rating Transducer frequency Transducer beam angle 210 x 63 x 54mm LED One 9V battery Feet and Fahrenheit or Meters and Celsius 2. 5 to 120 ft - 1 to 36m 3 bar/30m 100ft 200 kHz 20 degrees Operational temperature range 14ºF to 122ºF -30ºC to 50ºC Warning! [. . . ]