Uniden QT206 English Owners Manual - Page 18
Shallow Water Sensitivity - digital depth gauge
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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. Example: • SHALLOW READINGS: If your instrument occasionally displays random, false shallow readings such as 3.1', 2.8', and 4.3', you may need to adjust this control. • DEEPER READINGS: If your unit is reading false echoes which are deeper than the actual depth, you may not have enough sensitivity, which can also be corrected by using this control. • "0.0" READINGS: Adjusting this control too far in either direction could affect your readings. For example, if the adjustment is at an extreme, it could actually cause the unit to give a "0.0" reading at a deeper depth. The true depth could be 30 feet, and if the control is too far counterclockwise, the readout could be "0.0". This adjustment fine tunes the installation of your gauge to the location of the transducer on your boat and to the waters where you do your boating. It is typically an adjustment that is made by the boat owner since it is performed while the boat is in the water. Each depth gauge is tested at the factory with a transducer located in a water tank. The Shallow Water Sensitivity is then factory preset. However, after installation for your local waterways, you may need to perform this minor adjustment so that the depth gauge operates at its maximum potential on your boat. With Inside-the-Hull Transducer installations, it is especially important to perform this adjustment. It is impossible to control the many types of hull configurations on the many varieties of boats available today. Since fiberglass hulls are generally hand-layered, the hull thickness can vary from boat-to-boat even though they may be the same model. Thickness of the fiberglass combined with the many types of bottom conditions (sandy, rocky, muddy) can affect the readings on your digital depth sounder. This control enables you to tune your gauge more precisely so that the unit reads properly. Unless major changes take place in your boating environment, you should not need to adjust this setting again. 16