Owner`s manual

VOLTS TRIM CALIBRATION:
Final tuning is best accomplished when the battery pack is fully charged. The lower
the state of charge, the more the user will need to monitor and adjust the unit during
the first charge cycle.
1. Turn the amps knob all the way down (full counterclockwise).
2. Make sure the charger is plugged into the battery pack and that there are no open breakers or
open fuses in the DC battery circuit.
3. With the charger’s AC breaker switch in the OFF position, plug the charger into the AC power
outlet.
4. Now turn ON the charger’s AC breaker switch. The fans should come on.
5. Using an appropriate insulated screw driver, stick it into the VOLTS TRIM access hole (see
figure 04) and turn the internal adjustment potentiometer until you find the threshold where the
yellow LIMITS LED changes state. If the yellow LED is off, turn the trim pot counterclockwise
to get it to go on. If the yellow LED is on, turn the trim pot clockwise to get it to go off. Once
you find the threshold where the LED changes states, the cutoff voltage is set to the actual
battery voltage and the charger will not charge the pack above this voltage. Therefore, when
you are ready to charge you will need to turn the trim pot clockwise to raise this voltage
ceiling. Then turn the AMPS knob up until you can put the amount of amps you want into the
battery pack while not letting the batteries go over their peak voltage limit according to their
manufacturer’s data.
While charging, when the battery pack voltage hits the peak limit the yellow LIMITS
LED will come on along with the flashing blue TIMER LED.
figure 04. VOLTS TRIM Adjustment
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