Operator`s manual

2-3
2) Confirming charging
Confirm that the BATTERY CHARGER switch on the Control Panel is set to AUTO.
Further, confirm that the voltage shown on the battery voltage meter on the Control
Panel is normal (between 26.5 VDC and 27.0 VDC).
3) Cleaning
The battery and the area around it should always be clean and dry. Clean the
battery case with a water-moistened cloth. Do not use organic solvents, thinner,
gasoline, benzine or alcohol to clean the battery. (They may crack the case.) For
heavy dirt, clean the case with white kerosene.
4) Environmental conditions
• Keep the battery out of direct sunlight.
• Coat the nuts and bolts which tighten the battery contacts with anticorrosive paint.
Check the battery once a year, retighten nuts and bolts if necessary.
Flooded lead-acid battery (traditional battery)
Turns the battery charger on/off.
• AUTO: Automatically turns on the battery when the battery voltage is below 25.0 VDC
and turns it off when the voltage exceeds 28.0 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, wait for about 10 hours and then turn
off the switch. (For details, see the manual for the lead-acid battery.)
1) Charging the battery
Before operating the radio, check the voltage and current of the battery. When the
BATTERY CHARGER on the Control Panel is set to AUTO, the battery voltage is
kept between 25.0 VDC and 28.0 VDC. If the BATTERY CHARGER switch is kept in
the OFF position for a long time the voltage may fall below 24 VDC. In this case,
charge the battery as follows.
1. Set the BATTERY CHARGER switch to MANUAL.
The charging current is around 20 A at the start, and is reduced gradually as
charging proceeds.
2. When the charging current goes below 2 A, wait for about 10 hours and then turn
the BATTERY CHARGER switch off or set it to AUTO.
NOTE: When the AC power fails, the radio battery automatically supplies power to
the radio regardless of BATTERY CHARGER switch position. The battery
will not discharge as long as the AC power is alive.
2) Care of the battery
The lead-acid battery powers the radio console when the ship’s main 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.