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BATTERY INSPECTION AND CHARGING (TT-R90E)
Charging method using a variable voltage charger
Charger
Ammeter
YES
Adjust the voltage to obtain
the
standard
amperage.
Set the timer to the charging
time determined by the open-
circuit voltage.
Refer to "BATTERY INSPEC-
TION AND CHARGING".
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.
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?
YES
charging
3 - 25
INSP
ADJ
NOTE:
Leave the battery unused for more
than 30 minutes before measuring its
open-circuit voltage.
NOTE:
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.)
NO
Adjust the charging voltage to
20 ~ 25 V.
Monitor the amperage for 3 ~
5 minutes. Is the standard
charging amperage
exceeded?
NO
If the amperage does not
exceed the standard charg-
ing amperage after 5 min-
utes, replace the battery.
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