JRC JFS-280, Instruction Manual

Page: 66 / 328

3 Operating procedures 3-4
3
Turning on the power and extending the transducer 3.1.1
1. Press the [POWER] key.
The system's power turns on and the normal
screen is displayed.
Confirm that the hoisting device mark is
completely green.
Confirm that the hoisting device is stored.
2. Press and hold the [FALL] button of the hoisting
device for about five seconds. The text [DOWN]
appears in the center of the screen and the hoisting
device buzzer sounds for five seconds and then the
transducer starts being extended.
The extension finishes in about 30 seconds and then the
buzzer stops. The transducer mark is completely red,
and at the same time, transmissions are started
automatically by the "AUTO-TX" operation. (Refer to
2.1.3 Examples of transducer status display for details about the status display.)
●
Wait about two seconds after turning off the power before
turning the power back on.
●
Confirm that the ship's speed is under 15 knots and that the
depth of the water is at least 3 meters before you press the
[FALL] key. Not doing so could result in damage to the
hoisting device.
●
The sonar may malfunction if the ship's power supply is cut
off briefly while the sonar is operating. If this happens, turn
the sonar off and then back on again.
Precautions
Operating procedure
Example of normal screen