NorCross Marine Products Customer Support
posted this on November 17, 2011 04:37 PM
IN-HULL TRANSDUCER INSTALLATION
Since the hull absorbs acoustic energy, transmitting through the hull reduces the transducer's performance. Fiberglass hulls are often reinforced in places for added strength. These cored areas contain wood or structural foam which are poor sound conductors. To achieve optimal performance, find a location where the hull laminate is solid (not cored) and relatively flat.
Anchor/Moor the the vessel in a body of water away from other boat traffic.
Plug the transducer cable into the back of the depth sounder display and turn the display ON. Once the display is turned ON, it will display the test sequence and then display the current depth. Make sure the Keel Offset feature is turned OFF.
Place the transducer close to your ear (do not press up against your ear). If the transducer is properly connected it will be emitting a ticking sound (similar to a wrist watch). If you do not hear this ticking sound, recheck your connections or visit our Customer Service Center for advanced troubleshooting.
Hold the transducer over the side of the vessel so that it is the same distance below the water surface as it would be at the in-hull mounting location. Note the depth that is being displayed on the Depth Sounder.
Remove the transducer from the water. Use one of the methods below to test the depth readings with the transducer at the desired in-hull location selected in Step 1.
If the hull surface is not smooth, sand it with 30 grit sandpaper until a smooth surface is obtained (see Step 3 "Gluing the Transducer In Place for sanding instructions). Partially fill a thin plastic bag with water, place the transducer inside and close it tightly with a tie wrap. Wet the surface of the hull and press the transducer face against the hull through the bag. Proceed to # 6