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Digital Depth Sounder OPERATING GUIDE.
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1 Features, Specifications, and availability of Optional Accessories are all subject to change without notice. Contents Unpacking ...............................2 Features ................................2 Installing the QT 206 .......................
UNPACKING Your QT-206 Depth Sounder box should contain the following items: • Transducer with 3 lugs attached • Power Cable (attached to the gauge) • Mounting Bracket and hardware • This Operating Guide If any items are missing or damaged, please contact your dealer immediately.
INSTALLING THE QT-206 1. Find a location on your dash panel which will provide clear viewing and access to the LCD window. 2. After finding the right location for the indicator unit, mark a 2-inch hole to be cut out. 3. Check behind the panel for any cables or wiring which could be damaged.
TRANSDUCER WIRING On the rear of the unit, locate the terminal lugs extending out of the rear of the instrument. These terminals are used to connect the transducer wires. When shipped from the factory, the transducer is wired with 3 female lugs attached.
1. Connect the main unit to a 12-volt battery using the power cable supplied with your unit. You may extend this cable as necessary, but you must observe proper polarity (i.e., RED is positive and BLACK is negative). 2. Connect the BLACK wire to the negative ( - ) battery terminal.
transducer directly behind any strakes, ribs, intakes and outlets for live wells and/or engine cooling water, or any protrusion which may cause turbulence or cavitation. On slower, heavier displacement boats, good results can be achieved further from the keel.
3. Mark the outline of each slot on the hull. Mark the screw locations 1/8" from the bottom of each slot, and drill four holes 3/4" deep with a 9/64" drill. The slots in the bracket allow 5/8" of vertical adjustment which can be utilized to lower the transducer further into the water to achieve optimal performance.
have a solvent base. However, some solvent bases will damage encapsulation materials and plastics to varying degrees. If you need anti-fouling protection, use only paints with a mineral spirits base; do not use acetone vinyl-based paints.
• Do not install it on a lifting strake since this is the area where air bubbles travel from the bow to the stern, to provide a smooth ride. • On displacement power boats (trawlers), mount the transducer well aft and close to the centerline. • On I/Os, mount the transducer close to the engine(s).
5. Apply a 1/8" thick layer of sealant around the lip of the plastic or bronze housing. A thin layer should also be applied up the sidewalls to a height of 1/4" greater than the hull thickness. This will ensure there is sealant material in the threads to seal them, and hold the housing nut securely in place.
Mounting the Transducer 1. Drill a 1/8" pilot hole in the preferred transducer location. Refer to the previous section to determine the best location for your type of boat. 2. Drill a hole “slightly” larger than the stem of the transducer. Be careful not to make it too large as you will run the risk of water leaking into the hull.
INSIDE-THE-HULL TRANSDUCERS This type of transducer does not require the drilling of a hole as does the Through-the-Hull Transducer. However, since the sound waves transmitted and received by the Inside-the-Hull Transducer must pass through the hull, transducer performance will be reduced.
Use one of the following methods to determine if your chosen location is satisfactory: 1. Place the transducer in a plastic bag filled 1/2 to 3/4 full of water. Tie or tape the bag tightly around the transducer cable. Wet the selected location and place the bag against the hull, pressing the transducer face against the hull.
UNDERSTANDING SONAR All depth sounders emit ultrasonic sound signals from the transducer into the water located under your boat. These sound signals travel through the water at a rate of approximately 4,800 feet per second (1500 meters per second). The depth sounder transmits a signal and receives a returning echo.
SETTING THE SHALLOW WATER ALARM Located just below the LCD window are two keys labeled “DOWN” and “UP” Alarms. These keys are used to set the Shallow Water depth alarm so that it will audibly alert you if you enter water shallower than your preset depth alarm.
SHALLOW WATER SENSITIVITY The Shallow Water Sensitivity controls a circuit in the depth sounder that affects the first 10 feet of water. It alters the system’s response time in this area only, and can be used to compensate for installation imperfections.
WHEN TO USE LESS SENSITIVITY: SHALLOW READINGS Use less sensitivity when your instrument displays a series of random, shallow readings (3.5’, 2.9’, 4.1’) and the actual depth is greater. How to Perform When looking at the rear of the instrument, this adjustment is made in a clockwise direction.
WHEN TO USE MORE SENSITIVITY: DOUBLE ECHOES (READINGS TOO DEEP) Use more sensitivity when your instrument displays depths that are too deep; that is, greater than the actual depth. For example, if you are in 6’ of water and turn this control too far in the less sensitivity direction, you may see “12.
TROUBLESHOOTING GUIDELINE Symptom Possible Reasons Suggested Solutions “0.0" is flashing in the display window. Unit is not receiving an echo which could be caused by a variety of reasons: Sensitivity Adjustment was turned too much in one direction, actually squelching out the echo.
Symptom Possible Reasons Suggested Solutions Unit is not reading prop- erly at high speeds, causing high random numbers at high RPM . There are three basic types of installations: Inside-the-Hull, Through-the-Hull, and Transom Mount. Gen- erally, this situation is attributed to the location and installation of the transducer.
One Year Limited Warranty WARRANTOR: UNIDEN AMERICA CORPORATION (“Uniden”) ELEMENTS OF WARRANTY: Uniden warrants, for one year, to the original retail owner, this Uniden Product to be free from defects in materials and craftsmanship with only the limitations or exclusions set out below.
©1995,1996 Uniden America Corporation All rights reserved. Printed in the United States of America OMQT206.
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