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1. OPERATIONAL OVERVIEW
1-3
1.3 Turning the Power On/Off
1.3.1 Power on
This sonar has a demonstration mode which provides simulated operation without the
transducer. For further details see page 5-20.
Press the POWER switch on the control unit till you hear a “click.” A beep sounds, the lamp
above the switch lights and the startup display appears. Four seconds later the last-used
display appears.
**: Frequency
MODEL: CH-300 **/***kHz
Startup displa
y
Note 1: Wait at least five seconds before reapplying the power.
Note 2: If the language selection window appears, see paragraph 5.4.8.
1.3.2 Power off
1. Check that the speed is under 15 knots*, and then press the [↑] switch on the control
panel to retract the transducer. The lamp above the switch blinks while the transducer is
being raised and lights steadily when it is fully raised. *The transducer may be damaged
if it is raised when the speed is more than 15 kts.
30
25
Transducer status indicator
• Up arrow: Filled when transducer is fully retracted into the tank.
• Down arrow: Filled when transducer is fully lowered.
• Appropriate arrow flashes during raising/lowering of transducer.
Note: When the transducer is being raised automatically (auto raise feature),
the arrows are filled and the up arrow flashes. When the transducer is
fully retracted, the up arrow lights and the down arrow becomes hollow.
Transducer status indicator
2. Confirm that the lamp above the [↑
] switch lights steadily (meaning the transducer is
fully retracted) and then press the POWER switch.
Note 1: The transducer is automatically retracted into the tank even if the equipment is
turned off before retracting the transducer. However, for safety purposes, make it a habit to
retract the transducer before turning off the power.
Note 2: After changing settings, wait at least one minute before turning off the power to
allow the equipment to memorize settings (and start up with them at the next power up). No
harm will result to the equipment if this is not done.