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SECTION 4 |
12v version
Programmable
Parameter
Range
Boost
14 to
(Absorption)
16 vDC
voltage
Float Stage
The Float Stage is a maintenance stage in which the output voltage is
reduced to a lower level, typically about 13.5 volts, (27 volts for 24v
models) to maintain the battery's charge without losing electrolyte
through gassing.
The desired Float voltage can be programmed through the "Settings
Menu" (SCREEN 5, page 41) as follows:
12v version
Programmable
Parameter
Range
Float
13 to
voltage
15 vDC
Resetting of Charging Cycle
The charging cycle will be reset as follows:
-
If the AC is reconnected or the battery voltage drops below
12 vDC / 24 vDC.
-
If the charger remains in the Float Mode for 10 days.
4 Stage Charging Profile In Manually
Activated equalization Mode
For details of equialization procedure, please see pages 53 - 55 under
Section 8 - Operation.
4 Stage Battery Charging Cycle is used in the Equalization Mode.
Equalization Mode is activated manually when desired because
equalization of the batteries is carried out periodically - once per month
for battery under heavy duty service and every two to four months for
battery under light duty service. As equalization is a deliberate overcharge
of the battery for a specified time period, equalizing your flooded /
wet cell batteries will reduce sulfation, stir up the electrolyte to remove
stratification, equalize voltages of individual cells and thus, help reach
and maintain the peak capacity of the battery.
Please read about the necessity and details of equalizing batteries
under white Paper titled "Batteries, Chargers and alternators,"
available online at www.samlexamerica.com (Home > support
> white Papers).
The 4 stages of the cycle will be - Bulk, Boost (Absorption), Float and
Equalization. Equalization Mode is desirable for the proper health of Wet
Cell Batteries. Equalization voltage is programmable. Equalization current
and Equalization time are computed automatically. Please see Table 4.1,
page 15 for details of programmable settings.
battery Charging in
G4 Series
24v version
Programmable
Default
Range
Default
14.4
28 to
28.8
vDC
32 vDC
vDC
24v version
Programmable
Default
Range
Default
13.5
26 to
27
vDC
30 vDC
vDC
!
CAUTIon!
equalization Mode should be performed only on
vented, flooded (non-sealed or "wet") batteries
and not on the sealed AGM / Gel Cell batteries
and only as often as recommended by the battery
manufacturer.
ATTENTION!
La mode d'égalisation devrait être
faite sur des batteries ventillées, inondées (batteries
non-scellées ou «mouillées») et pas sur des batteries
scellées (AGM) ou cellulles gelées et, aussi souvent
que les recommandations du fabricant.
Fig 4.2 (page 18) shows the voltage and current curves during the
4 stages of charging in this mode
When Equalization is started manually, the charger will first execute Bulk
Stage followed by Boost (Absorption) Stage. On completion of Boost
(Absorption) Stage, the charger will execute Equalization Stage. After
completion of Equalization Stage, the charger will enter Float Stage. The
stage transitions will thus be: Bulk Stage (Constant Current)
(Absorption) stage (Constant voltage)
(Constant voltage)
Float Stage (Constant voltage).
As part of the Adaptive Charging Algorithm, the charging profile
in the Equalization Stage is based on the time To which is the time the
charger remains in the initial Bulk Stage. The charger will remain in
the initial Bulk Stage for a longer duration when the battery is deeply
discharged and for a shorter duration if the battery has a shallow
discharge.
!
CAUTIon!
For effective equalization to take place, it is desirable
that the batteries undergo a longer bulk Stage
applicable to the deeply discharged condition of the
battery. Hence:
• Please ensure that before the batteries are equalized,
they should be deeply discharged to ≥ 80% capacity. The
Standing Voltage (Terminal Voltage after disconnection
charging source[s] and load[s] for at least 3 hours) at ≥ 80%
discharge will be:
- 12V battery: Around 11.7V
- 24V battery: Around 23.4V
• Do not equalize partially or fully charged batteries
Boost
Equalization Stage
SAMLEX AMERICA INC. | 17
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