Schumacher Electric SC-10030A Owner's Manual page 15

Tester Status LEDs: When the SC-10030A is operating as a battery tester,
the status LEDs light under the following conditions:
• The CHARGED LED will light if a charged battery is tested.
• The CHARGING LED does not light in the battery test mode.
• The CONNECTED LED lights when a properly connected battery is detected.
• When the tester digital display is set to
CHARGING LEDs won't light.
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.
NOTE: The battery tester is only designed to test batteries. Testing a device
with a rapidly changing voltage could yield unexpected or inaccurate results.
Using the Alternator Performance Tester
Overview
This battery charger has a built-in alternator tester that displays an estimate of
the alternator's relative output compared to normal alternators. The alternator
% values displayed should be taken as a general reference, not a precise
diagnosis. The alternator tester functions the same as the built-in battery
voltage tester (see previous section for details) with a few differences.
Testing Sequence: There are three basic steps required to operate this unit
as an alternator tester:
1. With the charger unplugged from the AC outlet, connect the charger to the
battery following the instructions given in Sections 6 and 7.
2. Plug the charger AC power cord into the AC outlet, following the
instructions given in Section 8.
3. Start the vehicle, and turn on the vehicle's headlights. Read the voltage on
the digital display or press the DISPLAY MODE button to set the tester to
ALTERNATOR % to read the voltage as a percent of charge.
Tester Status LEDs: When the SC-10030A is operating as an alternator
tester, the status LEDs light under the following conditions:
• The CHARGED LED will light if the output of the charging system is at the
normally desired level.
• The CHARGING LED does not light in the alternator test mode.
• The CONNECTED LED lights if the tester detects a connection.
• When the tester digital display is set to
CHARGING LEDs won't light.
Alternator Testing Notes
• The alternator percent display can range from zero to 199.
• The DIGITAL DISPLAY cannot be set to ALTERNATOR % during charging.
• An ALTERNATOR % of zero does not indicate an ALTERNATOR output of
zero volts, it indicates an output too low to charge the battery.
• An ALTERNATOR % of 199 does not indicate an Alternator Voltage nearly
twice the voltage of a normal alternator.
VOLTAGE, the CHARGED and
VOLTAGE, the CHARGED and
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