elv ALC 7000 Expert Bedienungsanleitung Seite 32

7.4. Refreshing
This ALC 7000 Expert function is mainly designed for damaged batteries which
are generally capable of being used again after this program has been applied to
them. This particularly applies to totally discharged batteries and batteries stored
too long, and also to cells which have been short circuited, which can often be
used following the program.
Initially, the program checks whether a battery voltage is available or not and, if
necessary, clears up an internal short circuit by means of strong current pulses.
The ALC 7000 Expert then automatically performs two charge/discharge cycles.
The first of these cycles is (after automatically discharging) performed using a
current which is 10% of the set nominal capacity. Since the charge characteri-
stics of such damaged batteries often no longer show a typical progress, the -
∆U detection is deactivated in the first charge cycle. As, at this point, a timer-
controlled charging process occurs, the correct nominal capacity is important.
The second subsequent charge cycle is performed using the programmed
charge current, whereby the -∆U detection is reactivated.
- Select the „Auffrischen" (refresh) function using the „Funktion" (function) key
(refer to the diagram). This function is represented in the display by the text
„Auffrischen" and the circle-arrow symbol.
- The refresh cycle is started by pressing the „Start/Stop" key.
- After completing the refreshing process, „VOLL" (full) appears in the display
and the trickle current is supplied to the battery to keep it fully charged. The
corresponding channel LED flashes.
LC display indicators in refreshing mode:
Example illustrates charging
Selected
channel
Batterysymbol
7.5. Cycle regeneration
Spannung
Kanal
Au ffrischen
Kapazität
Current process indicator, here
charging; arrow pointing to right:
discharging.
Indicator for
refresh mode
V
Current cell voltage
Strom
mA
Actual current, here
charge current
mAh
Discharged capacity
during prior discharge
process
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