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well as the „Charging" LED flashes, if the
voltage of a correctly connected battery
is higher than 4.3 V (for a 2 V battery)
or more than 7.5 V in the case of a 6 V
battery or more than 2.4 V in the case of
2 V battery.
The device switches to the charging
mode, if the voltage is in the range of
0.5... 2.4 V (2 V battery), 0.5... 7.15 V (6 V
battery) or 0.5... 14.3 V (12 V battery).
Charging technology
The device has three different charging
phases:
• I-Phase, the charging current is approx.
0.6 A for a 2V battery and approx. 0.3A
for a 2V and 6V battery.
• U1-Phase (= Main charging phase) with
a constant voltage of 14.3 V (and/or
2.4V or 7.5V)
• U2-Phase (Trickle charge) with constant
voltage of 13.8 V (and/or 2.4V or 7.15).
The battery is first charged with a con-
stant current (I-phase) until the final
charge voltage (14.3 V/7.15/2.4 V) has
been reached. The voltage is then kept
constant (U-Phase) and the charging
current adapts itself to the charge state
of the battery. The fuller the battery, the
lower the charging current. The charging
procedure is terminated and the battery
charger switches automatically into the
test mode, if a charging current of ap-
prox. 00 mA is under run (see note N3).
The battery is loaded with a defined cur-
rent during this test. A large internal resi-
stance and/or a strong sulphation of the
battery is indicated, if the voltage of the
loaded battery thereby drops back to the
rated voltage. The battery charger evalu-
ates the battery as „defective", if the test
is not passed; the device then switches
itself off and the „Error" and „Finished"
LED's flash.
The battery charger switches the „Finis-
hed" LED on and goes into the refresh
mode, if all test criteria have been fulfilled
after charging and the battery has been
evaluated as „Good". The „Charging"
LED extinguishes simultaneously and the
„Refresh" LED is displayed. The battery
is therefore charged and ready for use
and can be disconnected from the battery
charger.
The program discharges for 5 minutes
with a current of approx. 30mA, if the
battery however remains connected to
the battery charger. The trickle charge
procedure is started after 5 minutes or
when the battery voltage is lower than the
nominal value (appropriate to 2, 6, 12V).
The „Refresh" LED thereby extinguis-
hes and the „Charging" LED is turned
on. The program now supplies a „Trick-
le charge" for 5 minutes. The charging
current is now adapted in such a way that
the battery voltage is automatically kept
at 3.8/6.9/2.3 V. The „Refresh" program
restarts after 5 minutes. This is repeated
cyclically until the battery charger is dis-
connected from the battery.
The operating modi:
The device can indicate three different
operating modes during operation:
. The „Charging" LED shines. Charging.
2. The „Charging" and „Finished" LEDs
shine: Trickle charge.
3. The „Refresh" and „Finished" LEDs
shine: Refresh.
Errors:
The device can indicate four different er-
rors:
0
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