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 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. Connect your unit to a 12 volt DC power source. Red cable to a ( + ), black to negative (-). 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. N this is done, it may cause damage to your unit. 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. This knob also serves as the "ON/Off" switch for the Chart. Turn this knob to the furthest counterclockwise position to turn the machine off. Turn the knob until it clicks to start the unit. At this point, the paper will be advancing at the FASTEST paper speed. To decrease the paper speed, turn the paper speed control clockwise. It is possible that in turning the control to its furthest clockwise position the paper will stop advancing. If this happens turn the control counter-clockwise until the paper starts moving. The shape of the targets can be controlled with this setting. [. . . ] On some engines external gap spark plugs are used which are partially troublesome. Electrical motors and generators can produce brush noise, and other installations do generate static electricity. High power radio transmitters can also have nuisance effects. Radios may also cause unit interference. [. . . ]