Operating Instructions - Schumacher SC1325 Owner's Manual

automatically change to ON (to show
charging has started) and either 6 or 12
(the voltage of the battery, determined
by the charger). If you manually stop the
charging process (by pressing the
Rate Selection button) before the battery
is fully charged, the display will show Off.
NOTE: During charging, the display will
go into sleep mode and will not show the
percentage of charge or voltage of the
battery. To turn the display back on, press
the Display button.
DISPLAY BUTTON
Use this button to set the function of the
digital display to one of the following:
(Battery %) – The digital display
shows an estimated charge percentage
of the battery connected to the charger's
battery clamps, when charging.
Alternator % (12V only) – The
digital display shows an estimated output
percentage of the vehicle's charging
system connected to the charger's battery
clamps, compared to a properly functioning
system. The alternator percent range is
from 0% to 100%. Readings below 0%
(13.2 volts) will read LO and readings
above 100% (14.6 volts) will read HI . If you
get a HI or LO reading, have the electrical
system checked by a qualified technician.
Voltage – The Digital Display shows
the voltage at the charger battery clamps,
in DC volts.
RATE SELECTION BUTTON
Use this button to select one of the
following:
6<>2A CHARGE/MAINTAIN – For
charging small and large batteries. Not
recommended for industrial applications.
40A BOOST – For quickly adding
energy to a severely discharged or large
capacity battery prior to ENGINE START.
The unit will automatically switch to
6A<>2A CHARGE/MAINTAIN after the
40A BOOST operation has completed.
250A ENGINE START – Provides
250 amps for cranking an engine with a
weak or run-down battery. Always use in
combination with a battery.

11. OPERATING INSTRUCTIONS

WARNING: A spark near the battery may
a cause battery explosion.
CHARGING A BATTERY
IN THE VEHICLE
1. Turn off all the vehicle's accessories.
2. Keep the hood open.
3. Clean the battery terminals.
LED INDICATORS
CLAMPS REVERSED (red) LED
flashing: The connections are reversed.
(yellow/orange) LED lit:
The charger is charging the battery.
CHARGED/MAINTAINING (green)
LED lit: The battery is fully charged and
the charger is in maintain mode.
NOTE: See Operating Instructions for
a complete description of the charger
modes.
BATTERY TYPE BUTTON
Use this button to select the type of battery.
– Used in cars, trucks and
motorcycles, these batteries have
vent caps and are often marked "low
maintenance" or "maintenance-free".
This type of battery is designed to
deliver quick bursts of energy (such as
starting engines) and has a greater plate
count. The plates are thinner and have
somewhat different material composition.
Standard batteries should not be used for
deep-cycle applications.
– The Absorbed Glass Mat
construction allows the electrolyte to
be suspended in close proximity with
the plate's active material. In theory,
this enhances both the discharge and
recharge efficiency. The AGM batteries
are a variant of Sealed VRLA (valve
regulated lead-acid) batteries. Popular
uses include high-performance engine
starting, power sports, deep-cycle, solar
and storage batteries.
– The electrolyte in a GEL cell has
a silica additive that causes it to set up
or stiffen. The recharge voltages on
this type of cell are lower than those for
other styles of lead-acid battery. This
is probably the most sensitive cell in
terms of adverse reactions to overvoltage
charging. Gel batteries are best used in
VERY DEEP cycle application and may
last a bit longer in hot weather applications.
If the wrong battery charger is used on
a gel cell battery, poor performance and
premature failure will result.
4. Set the switch to the OFF position.
5. Lay the AC/DC cables away from any
fan blades, belts, pulleys and other
moving parts that can cause injury.
6. Connect the battery, following the
precautions listed in sections 6 and 7.
7. Connect the charger to an electrical
outlet.
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