User manual LOWRANCE LRG-1510C

[. . . ] INSTALLATION AND OPERATION MANUAL MODEL LRG-1510C GRAYLINE® RECORDER · LOWRANCE Printed in U. S. A. 74128 ELECTRONICS, INC. PDF compression, OCR, web-optimization with CVISION's PdfCompressor NOTICE Periodically wash the Transducer Face with soap and water to removeanyoil film thatmay collect Oiland dirton the facewill reduce sensitivity or may even prevent sounding. GOT A PROBLEM?LET US HELP! It youhavea problem with your sonar unit, please give us a chance to help before sending it in for repair. Assistance can often be extended by telephone or letter. [. . . ] After installing, if the stylus won't print all the way down the paper, (See Figure 37) bend the right leg down so that more pressure is exerted against the stainless steel plate. If it still does not print all the way, bend the left leg down more (but not so far that it digs intothe paper). Latch both catches on the top of the case. STYLUS BELT REPLACEMENT -- CAUTION -- High voltage is present in the electronicsection when the unit is turnedon. 1. Release both catches on thetop ofthe case. Pull out and down onthe top of the casefront to expose the stylus belt. The stylus belt rides over two wheels located at the right edge of the platen assembly. Release both catcheson thetopofthe case. Pull out and 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 beltDOWN to positionthe stylus at the center of the platen. Fig. 8 Ground (Negative) (Positive) 4. Hold the stylus beltstationary with one finger, and remove the oldstylus by starting at its leftedge and moving it out from underthe tabson the stylus holder. The positive conducterin the power cable is the centerconductor. The unit is protected from accidental polarity reversals and no damagewill resultif battery connections are wrong. Before installing the new stylus, be sure it is bent properly by comparing it to Figure 35. Refer to Figure 36 to be sure thenew stylus is positioned correctly under the tabsonthe holder. Ifnot, bend the stylus away fromthe edge it is rubbing on until it does move freely. 19 PDF compression, OCR, web-optimization with CVISION's PdfCompressor 10. Push the platen assembly back to its operating position. Be sure it engagesthe catch inside the top of the case. (See Figure 32. ) C--- OPERATION SCALE KNOB -- used to select recording depth. There are four positions: 30 feet 60 feet 120 feet 360 feet Fig. Latch both catches on the top of the case. Move the Chart fl--- Speed knob fully clockwise. [. . . ] 16 0-- 20 -- 30 -- 40 -- 50 -- 60 -- 1 THERMOCLINES-- The temperature of water in the lake is seldom constant fromtop to bottom. Layers ofdifferent temperatures form, and the junctionof awarmandcool layerofwateriscalled a thermocline. Thedepth and thickness of the thermocline can varywith theseason or timeof day. In deep lakes there maybe twoor more, at different depths. [. . . ]