Schumacher Electric BTF-250 Owner's Manual page 6

10. The battery tester will display one of the following results:
• Green (OK) – The battery is good and capable of holding
a charge.
• Green and Yellow (OK & RECHARGE) – The battery is
good, but needs recharging.
• Yellow (RECHARGE BATTERY) – The battery voltage is too
low. The battery condition cannot be determined until it is fully
charged. Recharge and retest the battery.
• Yellow and Red (RECHARGE & RETEST) – The battery is
discharged. The battery condition cannot be determined until it
is fully charged. Recharge and retest the battery. If the reading
is the same, the battery should be replaced immediately.
• Red (BAD CELL) – The battery cannot hold a charge. It
should be replaced immediately (OR: the battery has at least
one cell short circuit. It should be replaced immediately).
• ERROR on the screen and second Red LED lit –
The clamps are not connected properly (OR: the tested
battery is larger than maximum testing CCA capacity).
NOTE: With any of the results, except OK and RECHARGE
BATTERY, the tester will ask you if the battery is charged: CHG-.
Press ENTER and then ▲ or ▼ to display YES or NO, and then
press ENTER again to continue the test.
11. Press ENTER to return to the beginning of the test, or remove
the clamps from the battery posts to end the test.
CHARGING SYSTEM TEST/VOLTMETER
This battery tester has a built-in voltmeter to test your battery's
state of charge and your alternator's output voltage.
1. Turn off the ignition, all accessories and any loads. Close all
vehicle doors, including the trunk.
2. Clip the red clamp to the vehicle's Positive battery terminal
and clip the black clamp to the vehicle's Negative battery
terminal. Be sure to follow all the precautions listed under
OPERATING INSTRUCTIONS.
3. Read the voltage on the digital LED display. See the following
chart for specifications.
Battery Voltage Test (Engine Off)
STATE OF CHARGE
100%
75%
50%
25%
DISCHARGED
Electrical System Test (Engine Running)
Normal charging voltage should range from 13.8-14.6V
LEAD FLOODED
12.65V
12.45V
12.24V
12.06V
11.89V
• 6 •
AGM
12.84V
12.60V
12.36V
12.00V
11.82V