Yamaha YP250 Service Manual page 88

Volt meter
Relationship between open-circuit
voltage and charging time at 20_C
(68_F)
Charging time
*This varies depending on the temperature, the state of
charge in battery plates and the electrolyte level.
BATTERY INSPECTION
D Batteries generate explosive hydrogen
D Charge batteries in a well-ventilated area.
D Keep batteries away from fire, sparks or
D DO NOT SMOKE when charging or han-
KEEP BATTERIES AND ELECTROLYTE OUT
OF REACH OF CHILDREN.
1. Remove:
2. Disconnect:
CAUTION:
Disconnect the negative lead 1 first and
then disconnect the positive lead 2 .
3. Remove:
4. Check:
*****************************************************
Battery condition checking steps:
D Connect a digital voltmeter to the battery ter-
NOTE:
The charge state of an MF battery can be
checked by measuring the open-circuit voltage
(i.e. the voltage when the positive terminal is
disconnected).
Open circuit voltage
12.8 V or more
Hours
3-38
gas. Always follow the following preven-
tive measures:
open flames (e.g., welding equipment,
lighted cigarettes, etc.)
dling batteries.
D Mat (right)
D Cover (battery case)
Refer to "COVER AND PANEL" section.
D Battery leads
D Battery
D Battery condition
minals.
Tester (+) lead ! Battery (+) terminal
Tester (-) lead ! Battery (-) terminal
INSP
ADJ
Charging time
No charging is neces-
sary.