FIELD TEST PROCEDURES
FOR A11 SERIES CHARGERS
Connect the AC input and DC output cables in accordance with the Installation and Operating Instructions. Be sure to
note proper polarity when connecting the battery cables, positive of the charger to the positive of the battery and the
negative of the charger to the negative of the battery.
TEST AS FOLLOWS:
With the high float switch in the float position, energize the charger. If the battery is discharged, the charger should
charge at a high rate - up to its current limiting point. When the battery comes up to the float voltage setting of the
charger, the voltage will be held constant and the current rate will taper off to a trickle charge
Transfer the high float switch to the high or equalize position. The output current rate of the charger should increase and
when the battery voltage rises to the equalize voltage setting, the current will taper to a trickle charge.
A load can be applied to the battery and charger. The charger should maintain the output voltage setting within m 1%*
from no load to the load rating of the charger If the applied load exceeds the rating of the charger, the output current will
be limited and the voltage will begin to drop.
ADJUSTMENTS:
One potentiometer is provided for adjusting the constant potential output of the charger The float setting for lead acid
batteries is 2.17 V/C for antimony and 2.2 V/C for calcium The equalize setting is 2.33 volts per cell. The settings for
nickel cadmium batteries is 1.4 V/C for float and 1.55 V/C for equalize or high rate
If further adjustment is necessary, an adjustable resistor (RVI) within the unit can be adjusted Two slider bands, red for
float and green for equalizing, are provided on this resistor
Two potentiometers can be provided as an additional option for independent adjustment of the float and equalize
voltages
*A40-A46-A28 + or - 5%.
CHARGER ACCESSORY
A11 SERIES CHARGER
CHARGE DIVIDER
Chargers may be provided with charge dividers for battery isolation.
The charger output is fed through two or more diodes (one diode per circuit or battery). The output current of the charger
is fed through these diodes to charge the batteries.
One battery may be completely discharged with the other battery remaining charged. The charge divider diodes isolate
the loads from each battery. On re-charge, the charger supplies a charge to all batteries. The major portion of the
charge will go to the more discharged battery.
When the batteries become fully charged, the charger will maintain all the batteries at full charge.
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