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Resumen del manual
OM-E2213-0J OPERATOR S MANUAL ECHO-SOUNDER MODEL FG-11/200 MARK-3 FURUNO ELECTRIC CO., LTD. NISHINOMIYA, JAPAN July, 1978 7807500J PRINTED IN JAPAN CONTENTS SPECIFICATIONS..........................................................................................................................2 Chapter 1. PRINCIPLE............................................................................................................3 Chapter 2. INSTALLATION............................................................................................4 Chapter 3. OPERATING INSTRUCTION ................................................7 Chapter 4. MAINTENANCE............................................................................................11 Cleaning of Recorder Unit........................................................................................................11 Adjustment of Zero Line ........................................................................................11 How to renew the recording stylus ................................................................................12 Replacement of Recording Paper ....................................................................................12 Replacement of Batteries (Dry cells) ............................................................................14 Replacement of Transducer ..................................................................................................14 Chapter 5. TROUBLE SHOOTING ................................. 15 SCHEMATIC DIAGRAM ................................................. 17 -1- SPECIFICATIONS OF FG MARK-3 SERIES DEPTH RANGES TYPE DEPTH RANGES SOUNDING RATE (PPM) PAPER ADVANCE (mm/min.) FG-11-A MARK-3 0- 40— 80-120-160 FA (0- 75-150-225-300 M) 150 10 FG-11-B MARK-3 0- 80-160-240-320 FA (0—150—300—450—600M) 75 5 FG-200-A MARK-3 0- 12- 24- 36- 48 FA ,0— 22— 44— 66— 88 M or, 0— 72-144-216-288 FT ' 511 17 FG-200-B MARK-3 0- 20- 40- 60- 80 FA ,0- 40- 80-120-160 M or, '0-120-240-360-480 FT } 300 10 RECORDING PAPER Dry Electrosensitive Paper (P—10) 100mm(4") x 15 Meters Effective Width 90mm POWER SUPPLY DC 12V external batteries or built-in 8 pieces of dry cells (continuously 10 hours). Power Consumption: ?W approx. Built-in power supply adaptor available for operation from main input of DC 24V TRANSDUCER FG-11 M-3 FG-200 M 3 Material Barium Titanate Vibrator Cable Length 10m Type 50B-6G 200B-5 Frequency 50KHz 200KHZ Beam width (3dB) 28° 10° INDICATION Neon Flashing and Graphical, or Neon Flashing only DIMENSIONS AND WEIGHT 8" x 12" x 578", 10 lbs. (204 x 298 x 147 mm, 4.8kg) COMPLETE SET Indicator 1 unit Transducer 1 pc. Spare Parts 1 set. STANDARD SPARE PARTS Recording paper (P—10) 4 pcs. Recording stylus with holder 1 pc. Recording stylus 5 pcs. Fuse 1A 1 pc. Pilot lamp 1 pc. CIRCUITRY Fully silicon transistorized White Line Facilities Output Power 10 Watts Pulselength 1.5 miltisec. (FG-11 M-3) •1.0 mill ¡sec. (FG-200M-3) -2- CHAPTER 1. PRINCIPLE An echo-sounder uses ultrasonic waves to determine the depth to targets, such as schools of fish and the seabed. The delay time between the transmitted pulse and reception of its echo serves to determine the depth to the target. For instance, if the delay time is one second, the depth will be found to be 750m (2,500 feet). Since the echo received is not strong enough to make recordings by itself, it is magnified through the amplifier circuits in order to produce an electrical mark on the paper. When the main switch is turned on, the magnet located on the driving arm is revolved by the driving motor and each reed switch on the disc is closed to trigger the transmitter circuit through the mono-stable multivibrator. There are four reed switches selected by the range switch. The transmitter circuit is active while each reed switch is ON and the ultrasonic pulses are emitted into the water. Closing of the selected reed switch makes the monostable multivibrator operate, and RF energy is generated. This RF energy after amplification, is fed to the transducer, and is converted into ultrasonic pulses. A trap circuit is inserted in the receiver input circuit. This circuit disconnects the amplifier circuit during transmission of pulses and connects it during reception of echo signals. Transmitter Power Amp. Colpitts' Oscllator Monostable Multivibrator Reed Switch Trigger The ultrasonic pulses are emitted in a specific direction determined by the beam width of the transducer. The pulses are reflected by the underwater object and the echoes are received by the same transducer. The signals received are changed into electric energy and are then magnified by the amplifier and recorded on the paper. The white line circuit facilitates the detection of schools of fish close to the seabed. The white line circuit consists of the white line amplifier, detector and pulse amplifier. The signal taken from RF amplifier output i...