Yamaha EF4500iSE Theory & Diagnostics Manual page 16

Yamaha Generator Theory & Diagnostics Guide
Battery Charging
Conditions of use of the DC power supply
■
Charging a 12V battery
■
Do not use for other than charging a 12V
battery .
The time taken to charge a battery depends on how
the battery is discharged. Charging is complete
when the specific gravity of the battery is 1.26~1.28.
Check the specific gravity in every hour or so.
A 40AH battery of a compact car which is half dis-
charged will be almost fully charged in about 3
hours. Be sure to check the level of the electrolyte.
Do not take energy from the battery nor run the
starter when the battery is being charged. This could
cause a large current to flow through the generator
coil, burning it.
Precautions for charging the battery
■
WARNING
The battery will produce a flammable gas . The
wrong handling might result in explosion or
serious injuries . Be sure to observe the follow-
ing when charging a battery .
1 . Keep fire and electric sparks away . Explosion
might happen .
2 . Secure a good ventilation where the battery
is charged . Otherwise, explosion might hap-
pen .
3 . Be very careful to handle the electrolyte
(diluted sulfuric acid) . It will burn anything,
so keep it away from your eyes, skin and
clothes .
4 . Before charging a battery, remove all cords
connected to the battery, doing it first from
the negative side . When reconnecting, do
the positive side first . If you do it incorrectly,
a short-circuit could result .
FIRST-AID PROCEDURES: If your skin or clothes
come in contact with the electrolyte, wash them
with a large amount of water immediately . If it
enters your eyes, wash with a large amount of
water and consult the doctor immediately .
WARNING
• When handling a battery, keep good ventila-
tion and keep electric sparks, like from
short-circuit, away . Also, keep fire away .
Explosion might happen because a flamma-
ble gas occurs from the battery .
• The battery electrolyte is diluted sulfuric
acid . If it comes in contact with your eyes or
skin, the affected part will be burnt . If it
should happen, wash the part with a large
amount of water for at least 15 minutes and
consult the doctor immediately .
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