The JFE-582 Echo Sounder is a marine navigation instrument designed to display information about sea depth and the formation of the seabed. It achieves this by emitting ultrasonic waves from a transducer mounted on the ship's hull, which are then reflected off the seabed and received back by the transducer. The main unit processes and displays this information.
Function Description:
The primary function of the JFE-582 is to measure and display water depth. It provides both a visual representation of the seabed profile on recording paper and a digital display of the current depth. Beyond basic depth measurement, the JFE-582 incorporates several critical safety and operational features:
- Depth Alarm: Issues an alarm (buzzer and lamp) when the water depth becomes shallower than a user-defined preset value, enhancing navigational safety in shallow waters.
- Power Fail Alarm: Activates an alarm (buzzer and lamp) if the main unit's power supply is interrupted, ensuring the crew is immediately aware of a potential system failure.
- Data Output: Outputs depth data in NMEA0183/JRC format, allowing integration with other external navigation equipment.
- Alarm Contact Signals: Provides contact signals for both depth and power fail alarms, enabling connection to external alarm systems or consoles.
- Recording Function: Utilizes 150mm-wide recording paper to display historical depth data, showing the seabed profile over the previous 10, 20, or 30 minutes. The recording can also be paused. A single roll of paper can record continuously for approximately 37 hours.
- Range Selection: Offers selectable depth measuring ranges of 10m, 50m, 250m, or 500m to suit various operational requirements.
Important Technical Specifications:
- Model: JFE-582 Echo Sounder
- IMO Standard Conformance: Conforms to IMO (International Maritime Organization) performance standards.
- MED Conformance: Conforms to Marine Equipment Directive (MED) standards, unifying format approval across European countries.
- Recording Paper Width: 150mm
- Recording Duration: Approximately 37 hours per roll of paper (continuous recording).
- Depth Measuring Ranges: 10m, 50m, 250m, 500m.
- Power Supply (Main Unit): AC100/110/115/200/220/230V (On-board power supply) or 85VAC to 265VAC, 50/60Hz.
- Power Supply (Power Fail Alarm): DC24V (On-board power supply).
- Data Output Format: NMEA0183/JRC format for depth data.
- Transducer Cable Length: 20m (supplied).
- Recorder Unit Dimensions: 334mm (W) x 385mm (H) x 325.5mm (D) (External dimensions).
- Recorder Unit Mass: 11kg.
- Matching Box (AW-154F) Dimensions: 186mm (diameter) x 64mm (depth) (External dimensions).
- Matching Box Mass: 4kg.
- Transducer Mounting (NKF-341) Mass: 22kg.
- Transducer Mounting (NKF-392C) Mass: 41kg.
- Operating Temperature Range: Not to exceed 55°C or fall below -15°C.
Usage Features:
The JFE-582 is designed for ease of use and intuitive operation:
- User-Friendly Controls: Features knobs for illumination control, making them easily distinguishable from other keys.
- Dedicated Keys: Independent keys for event mark, range selection, and depth alarm provide instant access to critical functions.
- Digital Depth Display: Eliminates the need for manual interpretation of the seabed profile on paper, allowing the current depth to be read at a glance on the LCD display.
- Alarm Management:
- ALARM ACK (Alarm Acknowledge) Key: Cancels the buzzer when a depth alarm occurs.
- Power/Brightness Knob: Stops the buzzer in the event of a power fail alarm.
- Depth Alarm Keys (+/-): Allows easy adjustment of the depth alarm threshold to deeper or shallower values.
- Recording Line Key: Prints a vertical line on the recording paper while pressed. Upon release, it prints water depth, longitude, latitude, date, and time (if connected to external navigation equipment).
- Menu System: Provides a menu-driven interface for setting various functions, with dedicated SELECT, SET, and +/- keys for navigation and adjustment.
- Remote Alarm Cancellation: Supports remote cancellation of the alarm buzzer, offering flexibility in bridge layout.
Maintenance Features:
The JFE-582 incorporates features to facilitate maintenance and ensure long-term reliability:
- Self-Diagnostic Functions: Offers self-diagnostic functions accessible through the menu, simplifying troubleshooting and maintenance procedures.
- Consumable Replacement: Provides clear instructions for replacing recording paper and recording pens.
- Internal Adjustments: Includes procedures for positional adjustment for 0m depth, adjusting recording belt tension, and replacing the recording belt.
- Fuse Replacement: Instructions are provided for replacing fuses.
- Unit Replacement: Guidance is given for replacing internal units.
- Cleaning: Recommends cleaning the equipment by removing dust and dirt and wiping with a clean dry cloth, cautioning against the use of thinners, benzene, or other organic solvents.
Safety Precautions:
The manual emphasizes several safety precautions:
- Electrical Safety:
- Always turn off the power switch at the main unit before connecting/disconnecting cables or units.
- Do not open the recording mechanism or power supply rail cover, except for specific adjustments or replacements, due to the risk of electric shock from high voltage conductors.
- Securely connect the earth lead to the earth terminal during installation to prevent electric shock from faults or power leaks.
- Do not connect to power sources other than specified (85VAC to 265VAC, 50/60Hz for main unit, 24VDC for power fail alarm).
- Environmental Conditions:
- Do not store or operate the equipment where temperatures exceed 55°C or fall below -15°C.
- Avoid sudden moves from cold to warm environments to prevent condensation and high-voltage leaks; allow 30 minutes for temperature equalization before switching on.
- Physical Integrity:
- Do not dismantle or modify the equipment.
- Do not place vessels with liquids or metal objects on top of the equipment to prevent spills or ingress, which could cause fire, electric shock, or damage.
- Install on stable and level surfaces to prevent falling or toppling, which could result in injury.
- Interference:
- Take care when laying transducer, power, and earth cables, as their positioning can affect electromagnetic interference with other equipment or the echo sounder itself.
- After installation, turn on all other equipment to check for interference.
- Operational Safety:
- Do not turn on the equipment's power when the ship is in dry docks, as this may damage the transducer.
- Turn off the power switch when the equipment is to be left unused for an extended period.
- Malfunction:
- Immediately turn off the power switch and contact JRC or its agent if smoke, unusual smells, or abnormal heat are noticed.
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