Schumacher Electric DSR PROSERIES DSR5254, Owner'S Manual

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pressing the START/STOP button. The
charger is always in tester mode until the
START/STOP button is pressed. Pressing
the START/STOP button activates the
charger and deactivates the tester.
TESTING AFTER CHARGING
After the unit has been changed from
tester to charger (by pressing the START/
STOP button), it remains a charger as
long as it’s connected to a battery. Press
the START/STOP button again to change
back to tester mode.
14. BATTERY PERCENT AND CHARGE TIME
This charger adjusts the charging time in
order to charge the battery completely,
efficiently and safely.
The duration of the charging process
depends on three factors:
Battery State
If a battery has only been slightly
discharged, it can be charged in less than
a few hours. The same battery could take
up to 10 hours if very weak. The battery
state can be estimated by using the built-in
tester. The lower the reading, the longer
charging will take.
Battery Rating
A higher rated battery will take longer to
charge than a lower rated battery under
the same conditions. A battery is rated in
Ampere-Hours (AH), Reserve Capacity (RC)
and Cold Cranking Amps (CCA). The lower
the rating, the faster the battery will charge.
Battery Size
The charger automatically selects a charge
rate up to 12 amps. The charger charges
at the selected charge rate and eventually
reduces the charge rate in a controlled
manner. After the charging process has
started, the digital display can be used
to determine the charging progress by
selecting the % (Battery %) mode.
Important facts to keep in mind when
charging a battery:
• When the display indicates 77% charged,
the battery has been charged enough to
start most vehicles.
• The battery % shown in tester mode is
an estimate based on the battery voltage
and a scale set by the Battery Council
International. The battery % shown
in charger mode is an estimate of the
relative charge in the battery compared to
the charge it should have if the charging
process is allowed to complete.
• The battery % shown in tester mode can
be used to estimate the relative charge
time. The lower the % shown, the longer
the charge time for a given battery.
• The battery % shown in charger mode
is an indication of the relative progress
of the charging process. The higher the
battery % displayed, the less charge time
remains.
• The more a battery is discharged, the
faster it absorbs a charge from the
charger. That means that the battery %
increases faster at the beginning of the
charging process than at the end. In
other words, it takes longer for a battery
to accept the last few percent of the
charge than the first several percent.
15. MAINTENANCE AND CARE
A minimal amount of care can keep your
battery charger working properly for years.
• Clean the clamps each time you are
finished charging. Wipe off any battery
fluid that may have come in contact with
the clamps to prevent corrosion.
• Occasionally cleaning the case of the
charger with a soft cloth will keep the
finish shiny and help prevent corrosion.
• Coil the input and output cords neatly
when storing the charger. This will help
prevent accidental damage to the cords
and charger.
• Store the charger unplugged from the AC
power outlet in an upright position.
• Store inside, in a cool, dry place. Do not
store the clamps on the handle, clipped
together, on or around metal, or clipped to
the cables.