JFE-680

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Appendix Noise Bubble Noise Bubble Interruption Interference Noise from other ship Plankton layer Appendix 44
Actual Pictures Seabed Zero line DISP TRANS DISP SURF DISP KEEL figure A Seabed Zero line Third reflection of bottom Second reflection of bottom Seabed In case of a shallow seabed or when increasing the amplifier sensitivity, two seabed lines may be recorded. This results from a multi-reflection of ultra-sonic wave between the seabed and hull bottom or surface of sea, in such manner: An emitted ultrasonic wave once reflected at the seabed returns toward the transducer or surface or sea but reflected at the hull bottom or surface of sea and again reflected at the seabed toward the transducer. Such multiple recording of the seabed may appear due to change of bottom quality. A double or triple reflection may be sometimes recorded. In any case, a first reflection recording from the zero line represents a real seabed return. A first, second and third reflection lines of seabed arrange with approximately equal spacing on the recording. In addition, the shade of the reflection lines fades little by little away from the fast line on the recording. From these conditions, they can be easily identified as a multireflection. Appendix 45
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JFE-680 Echo Sounder INSTRUCTION MA
Page 3 and 4:
General Information Thank you for p
Page 5 and 6: Before You Begin Symbols Used In Th
Page 7 and 8: Do not damage, break or modify the
Page 9 and 10: Do not turn on the equipment's powe
Page 11 and 12: Contents General Information ......
Page 13 and 14: 1. Introduction 1.1 Function The JF
Page 15 and 16: 1.4 Construction Equipment Outline
Page 17 and 18: 1.5 System Configuration 1. Introdu
Page 19 and 20: 3. Display 3.1 Standard mode (dual
Page 21 and 22: 3.3 Docking mode 3. Display 9
Page 23 and 24: Setting Depth Range Each time you p
Page 25 and 26: Selecting Display Mode Pressing the
Page 27 and 28: Menu Tree 2 4. Operation 15
Page 29 and 30: Display Settings DISPLAY SCROLL SPE
Page 31 and 32: Initial Settings INITIAL MEMORY INT
Page 33 and 34: Setting Format for Depth Data Outpu
Page 35 and 36: Setting Output System Signal SYSTEM
Page 37 and 38: Panel Circuit Operation Check KEY U
Page 39 and 40: 5.3 Master Reset Executing Standard
Page 41 and 42: (3) Close the paper cover by pressi
Page 43 and 44: (1) Replacing Main Power Supply Fus
Page 45 and 46: 7. Installation When installing the
Page 47 and 48: Wall-Mounted Equipment Figure 3-2 7
Page 49 and 50: NKF-345 7. Installation 37
Page 51 and 52: 7.3 Connecting Components Notes: 1.
Page 53 and 54: 9. After-sales Service 9.1 When Req
Page 55: 11. Specifications Display 10.4 inc
Page 59 and 60: Abrupt-Sloped Seabed Sidelobe False
Page 61 and 62: 7ZPNB0043 电子信息产品
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JFE-680

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