Using The Built-In Alternator Tester; Initial Percent Calculation; Notes For Testing Battery % - Schumacher SpeedCharge SC-10030A Owner's Manual

• The CHARGING LED does not light in the battery test mode.
• The CONNECTED LED lights when a properly connected battery is de-
tected.
• When the tester digital display is set to
CHARGING LEDs won't light (it could be testing a battery or an alterna-
tor).
15.7

INITIAL PERCENT CALCULATION

When a battery % is calculated for the first time after connecting a battery,
the digital display will show three dashes ("---") for a period as long as
several seconds while the tester analyzes the battery.
15.8

NOTES FOR TESTING BATTERY %

A recently charged battery could have a temporarily high voltage due
to what is known as "surface charge." The voltage of such a battery will
gradually drop during the period immediately after the charging system is
disengaged. Consequently, the tester could display inconsistent values for
such a battery. For a more accurate reading, the surface charge should be
removed by temporarily creating a load on the battery, such as by turning
on lights or other accessories.
The battery % ranges from 0 to 100.
The battery tester is only designed to test batteries. Testing a device with
a rapidly changing voltage could yield unexpected or inaccurate results.
16.

USING THE BUILT-IN ALTERNATOR TESTER

This battery charger has a built-in alternator tester that displays either
an accurate alternator voltage or an estimate of the alternator's relative
output compared to normal alternators. The Alternator % values displayed
should be taken as general reference, not precise diagnosis. The alterna-
tor tester functions the same as the battery tester (see previous section of
this manual for details) with a few differences.
16.1 TESTING SEqUENCE
There are three basic steps required to use the SC-10030A as an alterna-
tor tester.
a. 1.
b. 2.
c. 3.
voltage on the digital display or press the DIGITAL DISPLAY button to
set the tester to ALTERNATOR % and read the alternator percent.
16.2 TESTER STATUS LEDs
When the SC-10030A is operating as an alternator tester, the status LEDs
light under the following conditions.
Connect the battery clamps (see sections 6 and 7).
Connect the charger power cord to a 120V AC wall outlet.
Start the vehicle and turn on the vehicle's headlights. Read the
VOLTAGE, the CHARGED and
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