Product Manual

Operation
900-0161-01-01 Rev B 33
Figure 5 Repeated Charging (3
rd
, 4
th
, and 5
th
Cycles)

Prior to the beginning of Cycle 3, the AC source was lost. The battery voltage decreased below
the level of the
Re-Bulk
set point. Whenever this occurs, the Absorption timer resets to its
maximum amount.

In Figure 5, Cycle 3 begins when the AC source is restored again. The charger begins a new cycle
by entering Bulk stage. When it enters Absorption, the timer runs until it is interrupted by a loss of
AC power.

Following Cycle 3, the voltage does not decrease below
Re-Bulk
. The Absorption timer retains the
remaining time from Cycle 3.

Cycle 4 begins when the AC source is restored again. The charger enters Bulk stage and proceeds
to Absorption. This stage does not last for the full duration of the
Absorb Time
setting. The timer
uses up the remaining time from Cycle 3. Absorption ends when the timer expires.
In this example, the duration was also longer than the
Float Time
setting. Because the Float timer
began running near the beginning of Cycle 3 and also Cycle 4 (when the batteries exceeded the
Float Voltage
setting), the
Float Time
has also expired. The charger does not enter Refloat or Float
and goes Silent.
During the Silent period, AC is lost again. The battery voltage decreases until it reaches the
Re-Bulk
set point, prompting a new charge cycle. The Absorption timer resets to its maximum amount.

When Cycle 5 begins, the charger proceeds through the Bulk stage and then the Absorption stage.
At the end of Cycle 5, the
Float Time
has expired, so the charger goes Silent.
Cycle 4
Cycle 3
Absorption
Set Poin
t
Float
Set Poin
t
Re-Bul
k
Set Point
AC Loss
Absorption
timer resets
Absorption
timer runs
(part)
Inverter waiting to charge when AC restored;
a new set point is in use
Inverter now charging to a new
set point
Inverter has reached the charging
set point
Inverter completed charging; the previous set point
is no longer in use
Inverter waiting to charge when AC restored;
the previous set point is still in use
AC Loss
AC Loss
Bulk
Abs.
Silent
Bulk
Absorption
Silent
Bulk
Absorption
Cycle 5
Absorption
timer
resets
Absorption
timer runs
(remaining time)
Absorption
timer runs
(complete)