User manual LOWRANCE LRG 1500

[. . . ] INSTALLATION AND OPERATION MANUAL MODELS LRG-1500A AND LRG-1500M TRULINE RECORDER Printed in U. S. A. 988-0088-02 LOWRANCE INC. OKLA. PDF compression, OCR, web-optimization with CVISION's PdfCompressor / NOTICE Periodicallywash the Transducer Face with soap and water to remove anyof/film thatmaycollect Oiland dirt on the face will reduce sensitivityor may evenpreventsounding. GOT A PROBLEM?LET US HELP! If you havea problem with your sonar unit, please give us achance to help before sending it in for repair. Write or call one ofour Authorized Service Centers ortheLowrance Electronics, Inc. , Customer Service Department in Tulsa, OK. [. . . ] After installing, if the styluswon't print all the way downthepaper, (See Figure 37) bend the right leg down so that more pressure is exerted againstthe stainless steel plate. If it still does not print all theway, bend the left leg down more (but not so far that it digs into the paper). Latch both catches on the top of the case. -. , . *B -. . STYLUS BELT REPLACEMENT High voltage is present in the electronicsection when the unit is turned on. Release both catches on thetopofthecase. Pull outand down on thetop of the case front to expose the stylus belt. The stylus belt rides over two wheels located at the right edge of the platen assembly. Move the front of the belt DOWN to position the stylus at the center of the platen. Thiswill protectboththeunitandthe power cable in case either is ever shorted. A connectoris suppliedto attach the fuse to the powercable. L Fig. Theunitis in protected from accidental polarity reversals and no damagewill result if battery connections are wrong. Before installing the new stylus, be sure it is bent properly by comparing it to Figure 35. 4. Hold the stylus beltstationary with onefinger, and remove the old stylus by starting at its left edge and moving it out from underthe tabson the 6. Referto Figure 36 to be sure the new stylusis positioned correctly under the tabsontheholder. Ifnot, bend the stylus awayfrom the edge it is rubbing on until it does move freely. 19 PDF compression, OCR, web-optimization with CVISION's PdfCompressor 10. (See Figure 32. ) OPERATION SCALE KNOB -- used to select recording depth. There are four positions: LRG-1500A 60 feet, with high transmitter power 120 feet, with high transmitter power 360 feet, with high transmitter power METRIC LRG-1500M 60 feet, with low transmitter power 18 meters, with low transmitter power 18 meters, with high transmitter power 30 meters, with high transmitter power 60 meters, with high transmitter power Fig. Watch the paper long enough to be sure it is moving smoothlyand evenly across the platen. If the paper flutters or begins to run up-hill", repeat · ON/OFF AND SENSITIVITY KNOB -- Rotate the On/Off knob clockwise to turnthe unit on. The Sensivity knobworksmuchlike thevolumecontrol on a radio, that is, weaker signals will be detected with highersettingsof the knob. When cruising, or at other times when just simple bottom-contour information is desired, the Sensitivity setting can be low. In deep water or over soft, muddy bottoms, (which produce weak echoes), the setting will · Step B. have to be higher. When high Sensitivity settings are used, a second bottomechowill appear. Thisis normal and is caused by the returning signal reflecting offthe surface of the water, making a second trip to the bottom and back. [. . . ] In water less than 30', just click the knob on" -- do not advance the control knob. PDF compression, OCR, web-optimization with CVISION's PdfCompressor 16 9 HOW TO READ GRAPHS "ARCHED SIGNATURES" -- A remarkable advantage of the LRG-1500 A/M is that it can record individual fish with a characteristic arched mark that separates them from their stationary surroundings. The distance to w a fish when it moves into the sonar's cone of sound is shown as "A' in the drawing. When the fish has moved to the center of the cone, the distanceto it will be shorter, (line "B"), and as it moves out of the cone, the distance will increase again as shown in line "C". 5. To remove thefull take-up roll, push in and rotate the left paper retainer knob until it snaps out. [. . . ]