[. . . ] Do not use an abrasive cleaner (such as Comet) or chemical cleaners (such as paint thinner or Acetone) as these will damage the finish. As with any electronic instrument, never leave your Platinum ID Portable on the dash or rear deck area of a car or truck. Periodically check the brass terminal strips located in both battery compartments of the lower case. Deposits or oxidation can cause a faulty power connection and interfere with the performance of your unit. [. . . ] The rubber feet on the outside of the case will help prevent slipping or skidding when adjusting the viewing angle. The Platinum ID Portable is designed to use two 6-volt lantern batteries with the spring-type terminals. However, for maximum battery life we recommend using heavy -duty alkaline batteries. The actual life of a set of batteries can vary greatly depending on the type of batteries, the temperature, and use of the backlight. At temperatures above 70 degrees, with a new set of heavy-duty alkaline batteries, and without using the backlight, you can expect about 65 hours of operation. If possible, keep the batteries warm during use to maximize their life. Installing the Batteries To install the batteries, first remove the two battery covers located on each side of the lower case. To do this, grasp the front of the cover by the handle provided and lift upward to release, as shown below. Orient the batteries as shown and insert them into the battery compartments, making sure that the spring terminals make good contact with the brass terminal strips and that the batteries are fully seated. Replace the battery covers by first inserting the tab at the rear of the cover into the slot in the lower case, then pushing down on the front of the cover. The cover will snap into place, and battery installation is complete. The Platinum ID Portable battery compartments have been designed to accept commercially available batteries with an overall height within industry tolerance. However, some batteries may be slightly shorter, preventing the spring terminals from contacting the brass terminal strips in the lower case. Should this occur, stretch the spring terminals slightly so that they contact the brass terminal strips in the lower case. Assembling the Portable Sensor Your Platinum ID Portable Case includes all the necessary hardware to convert your Platinum ID sensor/transducer for portable installations. Assembly instructions for the Platinum ID 120 sensor are included below, and instructions for the Platinum ID 600 transducer are on the following page. The assembly of your portable sensor or transducer is shown in the illustrations provided. Platinum ID 120 Sensor Assembly Position the bracket with washers on each side of the mounting holes between the mounting ears on the sensor. Next, insert the thumbscrew through the entire assembly and install the flat washer and wing nut on the thumb screw. This design allows for sensor angle adjustment without the need for tools. Next, attach the rubber suction cup to the bracket with the Phillips head screw as shown. Unwind the cable and adjust the sensor so that it is at a 90-degeree angle to the bracket. Your portable sensor is now ready for installation. Assembling the Portable Transducer Position the bracket and tooth washers between the mounting "ears" of the transducer. Then, insert the thumbscrew through the entire assembly and attach the flat washer and wing nut on the thumbscrew. [. . . ] Do not use the upper tip as a handle to remove the suction cup. Securing the Sensor/Transducer Caution: Tie-down the sensor/transducer cable holder, as shown above, to ensure that if the suction cup comes loose the sensor/transducer will not be damaged by the propeller, thrown into the boat, or pull the unit out of the boat. Humminbird is not responsible for any damage due to the suction cup coming loose. The portable sensor/transducer can also be used without the suction cup if you have a fiberglass boat with a single hull. The sensor/transducer should be placed in a small amount of water inside the hull of the boat so that the sensor/transducer can shoot through the hull. The water must be in direct contact with the boat hull and there cannot be any air between the bottom of the sensor/transducer and the hull of the boat. [. . . ]