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INSP
ADJ
BATTERY INSPECTION AND CHARGING (TT-R90E)
Charging method using a variable voltage charger
Measure the open-circuit
voltage prior to charging.
Connect a charger and
ammeter to the battery
and start charging.
Is the amperage higher
than the standard charg-
ing amperage written on
the battery?NO
YES Charger
Ammeter
Adjust the voltage to obtain
the standard charging
amperage.
Set the timer to the charging
time determined by the open-
circuit voltage.
Refer to “BATTERY INSPEC-
TION AND CHARGING”.Adjust the charging voltage to
20 ~ 25 V.
Monitor the amperage for 3 ~
5 minutes. Is the standard
charging amperage
exceeded?
NO YES
If the amperage does not
exceed the standard charg-
ing amperage after 5 min-
utes, replace the battery.
If the required charging time exceeds 5 hours, it is advisable to check
the charging amperage after 5 hours. If there is any change in the
amperage, readjust the voltage to obtain the standard charging
amperage.
Leave the battery unused for more than 30 minutes before measuring
its open-circuit voltage.
12.8 V
→ Charging is complete.
12.0 ~ 12.7 V
→ Recharging is required.
Under 12.0 V
→ Replace the battery.
Leave the battery unused for more
than 30 minutes before measuring its
open-circuit voltage.
Set the charging voltage to 16 ~ 17 V.
(If the charging voltage is lower, charg-
ing will be insufficient, if it is higher, the
battery will be over-charged.)
NOTE:
NOTE:
