User manual LOWRANCE PD-N INSTALL GUIDE

[. . . ] To use the PT-W, choose an area on the transom that is free from air bubbles when the boat is moving. Although this is not a high speed transducer, it will operate when the boat is moving faster than trolling speeds. It is important to mount the transducer in an area that is free from air bubbles, since they cause interference on the sonar's display. [. . . ] If the transducer is not placed in a smooth flow of water, interference will show on the sonar's display in the form of random lines or dots whenever the boat is moving. The transducer should be installed with it's face pointing straight down, if possible. If possible, route the transducer cable away from other wiring on the boat. Electrical noise from engine wiring can be displayed on the sonar's screen. Noise from bilge pumps and aerators can also be picked up, so use caution when routing the transducer cable around these wires, also. 2 SHOOT-THRU-HULL The transducer installation inside a fiberglass hull must be in an area that does not have air bubbles in the resin or separated fiberglass layers. A successful transducer installation can be made on hulls with flotation materials (such as plywood, balsa wood, or foam) between layers of fiberglass if the material is removed from the chosen area. For example, some manufacturers use a layer of fiberglass, then a core of balsa wood, finishing with an outer layer of fiberglass. Removing the inner layer of fiberglass and the balsa wood core exposes the outer layer of fiberglass. The transducer can then be epoxied directly to the outer layer of fiberglass. Epoxy is poured into the hole and the transducer is then placed into the epoxy. Any air bubbles in the fiberglass or the epoxy will reduce or eliminate the sonar signals. To choose the proper location for thru-hull mounting, anchor the boat in 60 feet of water. Plug the transducer into the sonar unit, turn it on, then hold the transducer over the side of the boat. Adjust the sensitivity and range controls until a second bottom echo is seen on the display. Next, take the transducer out of the water and place it in the water in the sump of the boat. Observe the sonar signal to see if there is a noticeable decrease in sensitivity. The second bottom signal may disappear and the bottom signal may decrease in intensity. If the sensitivity control has to be increased greatly to compensate, then a different type of transducer should be mounted on the outside of the hull. If not, then mark the location that shot through the hull the best and follow the instructions below for a thru-hull mounting. 3 TRANSDUCER LOCATION (HIGH SPEED) TRANSDUCER LOCATION (TROLLING SPEEDS) Shoot-thru-hull Installation DEADRISE LESS THAN TEN DEGREES 1. [. . . ] Attach it using a automotive hose clamp available at any auto parts store. Measure the diameter of your trolling motor and purchase a hose clamp slight larger. Position the transducer to aim straight down with the cable angled away form the direction of travel. [. . . ]