SELECTING THE TYPE OF BATTERY AND CHARGING STAGES
The Float or Maintenance Charge Mode (U Phase) voltage and Absorption / Boost
Charge Mode (Uo Phase) voltage of different types of Lead Acid Batteries are different.
3 Stage charging (Stages 1, 2 and 3) is recommended when charging stand alone,
unloaded battery (The battery has no load connected to it when it is being charged).
When the charger is used to charge a battery and simultaneously supply an external load,
the voltage level of Stage 2 is required to be set to the same level as the voltage of Stage
3 to prevent over-charging. Effectively, the battery will be charged in 2 stages only –
Stage 1 and Stage 3. This also applies when two banks of batteries are being charged
simultaneously and the batteries in the two banks are in a dissimilar state of discharge
A pair of switches S1 & S2 out of a set of 4 Dip Switches (5) has been provided for
selecting the battery type and for modifying the Boost Stage when charging loaded
batteries / two banks of batteries with different discharged states. The following selec-
tions can be made with the help of the Dip Switches S1 and S2:
Caution!! :
Do not change the Dip Switch setting when the charger is operating. Always
change the Dip Switch setting when the charger is off, i.e. after disconnecting the charger
from the AC input power)
NOTE:
The voltages are for battery temperature of 80º F
DIP Switch Setting for SEC-1245A
S1 S2 Float Boost Battery Type Charging Stages
Stand-alone charging
OFF * ON * 13.5 V * 14.4 V * Flooded / AGM * 3 Stages (Stages 1, 2, 3)
ON OFF 13.5 V 14.0 V Gel Cell 3 Stages (Stages 1, 2, 3)
Charging loaded battery
or
Charging two banks and the batteries in the two banks are in dissimilar discharged
condition
OFF OFF 13.5 V 13.5 V Flooded / AGM / Gel 2 Stages (Stages 1, 3)
* Factory pre set in this position
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