Furuno RC-1800F2 Operator's Manual page 20

2. MAINTENANCE
Voltmeter, Ammeter
Monitor battery voltage and electric current during charging of radio battery. The bat-
tery voltage is kept between 25.0 VDC and 28.0 VDC in the flooded lead-acid battery,
and 26.7 VDC in the valve-regulated lead-acid battery.
BUZZER STOP switch
This switch silences the buzzer. The buzzer sounds when the battery is abnormal or
AC power fails.
TEST switch
This switch starts the voltage drop test. Do the test as follows:
1. Push the TEST switch to start the voltage drop test.
2. Rotate the encoder knob next to the TEST switch fully-clockwise.
3. Slowly rotate the encoder knob counterclockwise to swing the voltage pointer.
4. Confirm that the buzzer sounds when the pointer is lower than approx. 22 V.
5. Push the BUZZER STOP switch to silence the buzzer.6.Push the TEST switch to
finish the test.
BATTERY CHARGER switch (valve-regulated lead-acid battery, mainte-
nance free)
AUTO: Always set the switch to AUTO. 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 fails,
to enable communication in the event of distress. Therefore, follow the points
mentioned below to keep the battery in good working order.
2. Confirming charging
Confirm that the BATTERY CHARGER switch on the Control Panel is set to AU-
TO. 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).
2-2
WARNING 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.