Cleaning Display Screens; Maintenance - Furuno RC-1800T Operator's Manual

3) Confirming charging
Confirm that the BATTERY CHARGER switch on the Control Panel is set to AUTO.
Further, confirm that the voltage shown battery voltage meter on the Control Panel
shows is normal (between 25.0 VDC and 28.0 VDC).
4) Check the specific gravity of electrolyte
Keep the specific gravity of electrolyte within 1.240 ± 0.010 (20°C).
5) Water supply
The optimum electrolyte level is such that water fills to the highest graduation on the
scale at the side of the battery case. When the electrolyte level falls below the
highest graduation, fill to the highest graduation with distilled water. Do not use
diluted sulfuric acid or tap water; they will shorten battery life.
6) 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.
7) Environmental condition
• 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.
2.2

Maintenance

1.

Cleaning display screens

Dust or dirt on the display screens of equipment may be removed with a soft cloth. Do
not use chemical cleaners—they may remove paint and markings.
2-4
WARNING
Keep sparks and lit smoking materials
away from the lead-acid battery. Make sure
the battery room is well ventilated.
The battery emits hydrogen gas which can
cause explosion.
The electrolyte in the lead-acid battery
contains sulfuric acid, which can be
harmful to the human body, particularly
to the eyes.
If sulfuric acid contacts eyes, skin or clothing,
flush directly with water. For eyes, contact a
physician. Loss of eyesight can result.
The temperature of the electrolyte in the
lead-acid battery should not exceed 45°C.
The electrolyte can cause explosion if it
becomes too hot.