User manual HUMMINBIRD CH THIRTY II

[. . . ] CH-THIRTY II OPERATIONS MANUAL OPERATING YOUR CH THIRTY II Before attempting to operate your Humminbird CH Thirty II, it is recommended that you read the operations manual thoroughly. You will find several features on this unit, not found on any other Chart Recorder. To completely understand all the features, we suggest you follow the instructions set forth in this manual. If, after reading this manual, there is something you do not understand about the operation of your unit, we recommend you contact our Customer Service Department. INTRODUCTION Theory of operation Your CH-THIRTY II operates on the basic principal of sonar. [. . . ] The divider of the two-part Humminbird epoxy kit is then removed and the two parts mixed together thoroughly for about five minutes. By clipping one corner of the plastic envelope, a liberal amount of epoxy is put on the face of the transducer and spread evenly with the applicator provided. Any remaining epoxy is then applied to the inside hull where the transducer is to be installed and by using a circular motion to squeeze out all air bubbles, the transducer is placed into position. Finally, by pressing down firmly and holding for a few minutes the installation process is completed cleanly and efficiently. Now properly affixed, the unit should function accurately at all speeds. There will be cases where it is necessary to use a through-the-hull transducer. If the hull has a curvature, it will be necessary to use a fairing block, shaped to fit the inside and outside contour of the hull. These can be made of hardwood, casting resin or any other suitable material. The fairing blocks should be cut or molded to the same dimensions as the head of the transducer and thick enough to compensate for the contour of the hull. Caution: The hull of a wooden boat will tend to shrink when left out of the water for a prolonged period of time. The nut should be hand tightened only, until the hull has had a chance to swell. The nut can then be tightened securely. INSTALLING THE POWER CABLE The PC-3 power cable is supplied with your Chart. A THREE AMP SLOBLO AMP FUSE SHOULD BE INSTALLED BETWEEN THE RED CABLE AND POSITIVE POLE ON YOUR 12 VOLT BATTERY. Some boats are equipped with a fuse panel, generally located beneath the console. The power source can be wired into the fuse panel, HOWEVER IT IS RECOMMENDED THAT THE POWER CABLE BE WIRED DIRECTLY TO THE BATTERY. Important: Although your power connector is made to plug in only one way, it can be forced on incorrectly. So observe the offset of the power plug pins and connect it to the control head accordingly. Note: It is recommended that all cables for your chart (transducer and power) be positioned as far away from all other wires and controls as possible. It is especially important that these cables be located away from the ignition system to reduce the risk of interference in the unit. OPERATIONAL INSTRUCTIONS Your Humminbird CH-THIRTY II has five control knobs located in the front of the unit. It is suggested that you understand the function of each before attempting to operate the unit. Paper Speed: The first control knob located to the far left is the paper speed control. Turn this knob to the furthest counterclockwise position to turn the machine off. [. . . ] A pre-loaded cartridge will save time and can be changed in a matter of seconds. We recommend at least one extra cartridge. CHANGING A STYLUS After prolonged running a stylus may tend to wear and require replacing. To replace the stylus element, open the front cover and rotate the stylus belt until the stylus holder is in the center of the unit. The right hand element makes contact with the pick up bar to the right of the stylus belt. [. . . ]