Equalization Phase {10016} (Menu) - Studer VarioTrack VT-40 User Manual

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8.4.7.5 End of the absorption triggered by the current {10012} (no)
The absorption phase can be interrupted when the battery charging current goes under a certain
threshold, at which point the charger automatically passes to the next authorized phase. This can be
used in order to shorten the period under which a high voltage is applied and thus reduce water
consumption.
8.4.7.6 Current threshold to end absorption phase {10013} (10A)
Sets the current under which the absorption phase is considered finished. When the charger current
goes below this value, the next phase (most often the floating phase) starts. If the production of the
PV generator is insufficient to keep the voltage, this current is not taken into account and the
absorption phase goes on.
Progressively, during the absorption phase, the charging current decreases naturally. If
the bulk phase has been carried out with a current appropriate for the battery, it is not
necessary to wait for a certain period to finish charging. The absorption phase can be
interrupted if the battery charge current falls below a certain level.
8.4.8 Equalization phase {10016} (menu)
Some types of battery need equalization in order to avoid the stratification of the water and acid
they contain. Use the parameters hereafter to set the operating conditions of this charging phase as
described in chap. 7.2.4.
During an equalization phase, an emission of a highly explosive gas occurs
(hydrogen/oxygen). Follow carefully all the instructions of the battery manufacturer
regarding this phase. In any case, make sure that the battery room is adequately
ventilated. Equalization reduces the battery water level: check it regularly.
8.4.8.1 Equalization authorized {10017} (no)
Determines whether the equalization phase (triggered manually or automatically) is allowed or not.
8.4.8.2 Forcing an equalization {10018} (signal)
Use this parameter to start manually the equalization phase. It is possible to force an equalization
phase only when it is authorized by {10017}.
Once equalization phase is initiated, disabling the phase does not stop the equalization.
To stop the equalization, force the transition into floating {10006}, absorption {10010} or a
new cycle {10029}. It is also possible to interrupt the equalization by pressing the "SET"
button for more than 2 seconds (procedure described in chap. 6.1).
8.4.8.3 Battery equalization voltage {10021} (2.6V/element) (15.6V/31.2V/62.4V)
This parameter determines the maximum voltage during the equalization phase.
This voltage is corrected by the temperature compensation factor {10036} if a
temperature sensor (BTS-01 or BSP) is installed in the system.
8.4.8.4 Battery equalization current {10020} (80A)
The equalization phase can be carried out with a limited current that can be adjusted using this
parameter. In any case, the current does not exceed the bulk current {10002}. As a rule, the limited
charging current is used only if the equalization is started at the end of the absorption phase.
8.4.8.5 Equalization period {10022} (30min)
This parameter determines the equalization period. The equalization phase starts as soon as the set
voltage {10021} is reached. When the period has elapsed, the charger goes automatically to the
following authorized phase. If the voltage cannot be kept (no sunshine, clouds...), the countdown is
paused.
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