Operator`s manual

2-2
2. BATTERY MONITOR lamp
IN USE lamp (AC power failure: orange)
Lights to alert that the AC power has failed and the radio equipment is being
powered by the radio battery (DC power) alone. When lit, only the equipment
related to distress communication are powered. (Power is not supplied to console
lights.)
LOW VOLT lamp (low battery voltage: red)
Lights to alert that the battery voltage is below 22 VDC. (The aural alarm sounds
until the voltage becomes higher than 22 VDC.)
3. Voltmeter, Ammeter
Monitors battery voltage and electric current during charging of radio battery. The
battery voltage is kept between 25.0 VDC and 28.0 VDC in the flooded lead-acid
battery (traditional), and 26.7 VDC in the valve-regulated lead-acid battery.
4. Dimmer knob
Turns on the desk lamp and adjusts lamp brilliance, and is located at the top of the
console. The desk lamp does not light during AC power failure; use the emergency light
instead.
5. BUZZER STOP switch
This switch silences the buzzer. The buzzer sounds when the battery is abnormal or AC
power fails.
6. BATTERY CHARGER switch
Valve-regulated lead-acid battery (maintenance free battery)
• AUTO: Set the switch to AUTO always. The battery voltage is kept between 26.5
VDC and 27.0 VDC.
• OFF: Disconnects the charger from the radio battery.
1) Care of the battery
The lead-acid battery powers the radio console when the ship’s mains power and
emergency power fail, to enable communication in the event of distress. Therefore,
follow the points mentioned below to keep the battery in good working order.
WARNING
Do not remove or disassemble
the safety tap of the lead-acid battery.
Removal may cause the battery to explode,
lower its performance or shorten its life.
The temperature of the electrolyte in
the lead-acid battery should keep
between -15°C and 45°C.
The electrolyte can cause explosion if it
becomes too hot.