Functional And Performance Description - Conrad ReFLEX 200 multi Bedienungsanleitung

4. Functional and performance description

The charger is designed for accumulator packs of 4 to 16 series-connected NiCd
or NiMH cells of the sizes lady, micro, mignon, baby or mono. Depending on the
accumulator capacity and the set charging current, the charging period is between
15 and 60 minutes. In the case of accumulators with capacities higher than those
specified above, the charging period can be more than 60 minutes. If 60 minutes
are exceeded, the device automatically turns off the boost charging process
(safety shut-down by charge timer) and switches over to floating operation. In this
case, in order to achieve full charge, the charging process can be started for a
second time by reconnecting the accumulator.
Description of charging process:
There are four steps to the charging process.
1.) Smooth-start charging
At the start of charging, used accumulators usually show a high impedance
(electric internal resistance of the accumulator). As this may lead to processor
measurement errors, the accumulator is first formed. This process takes about 2
to 3 minutes. During this period, the charging current is slowly increased to the set
final value. Discharging with current impulses does not yet take place. The
impulse LED flashes briefly about once a second, and the duration of the flash is
gradually increased. The green charging LED is permanently illuminated. If, at this
stage, the processor detects short circuits in cells or cells that have become highly
resistive, it discontinues the charging process and switches to fault display (red
error LED).
2.) Boost charge
If forming has been completed successfully, boost charge begins. The charging
LED is permanently lit, the impulse LED flashes approx. once a second with long
flashes. At this stage, the charge consists of a cyclic, recurrent sequence which
consists of a charging current impulse lasting about 1 second, a 2.5 to 3 times
higher discharging current impulse with very short duration and a zero-current
measuring period, during which the current accumulator voltage is determined.
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