2 – 2
Control description
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1 BATTERY CHARGER switch
Turns battery charger on/off. When charging, battery voltage is shown on the voltage meter on
the Control Panel.
AUTO: Automatically turns on the battery charger when the battery voltage is below 23
VDC and turns it off when the voltage exceeds 27.5 VDC. While the vessel is
underway, set the switch in this position.
OFF: Disconnects the charger from the radio battery.
MANUAL: Charges the battery manually.
Note: When the charging current falls below 2A the switch to the “OFF” or “AUTO” position.
For maintenance free battery, keep the switch to the “AUTO” position to maintain the battery
voltage between 23 V to 27.5 VDC.
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2 BATTERY MONITOR lamp
IN USE lamp (AC power failure: orange): Lights to alert that the AC power has failed and radio
equipment are being powered by the radio battery (DC power) alone. When lit, only the equip-
ment related to distress communications are powered. (Power is not supplied to PP-510 or
console lights.)
LOW VOLT lamp (low battery voltage: red): Lights to alert that the battery voltage is below 22
VDC. (Aural alarm sounds until the voltage becomes 22 VDC.)
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3 EMG LIGHT switch
Turns the emergency lamps at the top of the console on/off(RC-1800T: option).
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4 Ammeter, Voltmeter
Monitors voltage and electric current for charge of radio battery. Green line on voltmeter indi-
cates 24 VDC.
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5 Dimmer knob
Turns the desk lamp on/off and adjusts lamp brilliance, and is located at the right side of the
console. The desk lamp will not light during AC power failure; use the emergency light instead
(RC-1800T: option).
Battery charging
Before operating the radio, check the battery voltage on the meter provided on the AC/DC
Power Supply. The battery voltage is kept between 23 VDC and 27.5 VDC when the BAT-
TERY CHARGER switch is in the AUTO position. Note that the OFF position of the BAT-
TERY CHARGER switch may allow the voltage to drop below 23 VDC. In this case, charge
the battery as follows:
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