Schumacher SF-520MA, SF-1275A, SF-5212A, SF-125A owner manual Charge Period, Storage

N.INDICATION OF PROPER OPERATION TO A DISCHARGED BATTERY

BUT OTHERWIDE IN GOOD CONDITION

1.12 AMP setting: The initial charge current should be 12 AMP’s gradually tapering throughout the charge cycle to 5 Amp’s. Though not indicated, battery voltage will gradually rise to approximately 15 volts, then hold constant throughout remainder of charge cycle. When the battery reaches 15 volts and charge current drops to 5 AMP’s the charger will turn off. Initially the battery voltage will drop from its 15 volt level fairly quickly. When 13 volts is reached, the charger will again turn on, until the 15 volt, 5 AMP condition is met.

As this action continues, ON time will decrease to a few seconds while OFF time increases to a range of several minutes to an hour. ON/OFF times vary with size, type and condition of battery.

2.2 AMP setting ON/OFF action is a function of battery voltage only, otherwise identical to 12 AMP setting.

3.At no time during the charge cycle should there be any sign of vigorous bubbling of the battery fluid.

O. CHARGE PERIOD

The approximate required time to bring a battery to full charge state depends upon the number of ampere-hours (AH) depleted from the battery. AH’s are determined by multiplying the num- ber of hours by the number of AMPS supplied to a load.

For example - If a load was connected to a battery, which drew 7 AMPS for a period of 5 hours, the battery will have supplied 35 AH . The approximate recharge time would then be calculated by dividing the 35 AH depleted from the battery, by the ampere charge rate of the charger. To allow for tapering off of the charge rate, add 25 percent to the charge time.

Indications of a fully charged battery are:

1.When the meter indicates an intermittent current flow to the battery.

2.A hydrometer reading of the specific gravity of the electrolyte (fluid) of a battery in good condition should be between 1.250 and 1.285.

3.When a battery reaches 80-85% of full charge, bubbles will appear on the surface of the fluid. As the battery nears full charge, bubbling will become more noticeably active.

4.The time required to charge two 6-volt batteries connected in series will be the same as for one 12-volt battery of equivalent size.

NOTE: This charger will shut off when the battery is fully charged and will turn back on automatically when the battery needs to be charged again.

5.Do not charge two 12-volt batteries in parallel.

P.STORAGE

Store battery charger in a dry area.

7