Schumacher AUTOMATIC BATTERY CHARGER XC75 - Manual (Page 9)

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6 Volt Battery
Voltage Reading
12 Volt Battery
Voltage Reading
Battery Condition
6.4 or More 12.8 or More Charged
6.1 to 6.3 12.2 to 12.7 Needs Charging
Less than 6.1 Less than 12.2 Discharged
Tester and Charger: When first turned on, the unit operates only as a tester, not as a
charger. Selecting a charge rate activates the battery charger and deactivates the tester.
Pressing the CHARGE RATE button when the ENGINE START LED is lit (except during
the 180 second cool down) will shut off the charger and activate the tester.
Power-Up Idle Time Limit: If no button is pressed within 10 minutes after the battery
charger is first powered up, the charger will automatically switch from tester to charger
if a battery is connected. In that case, the charger will be set to the start up default
settings.
Testing After Charging: After the unit has been changed from tester to charger (by
selecting a charge rate), it remains a charger. To change the battery charger back to a
tester, press the CHARGE RATE switch until all charge rate LED’s are off.
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
With the charger unplugged from the AC outlet, connect the charger to the battery 1.
following the instructions given in Sections 6 and 7.
Plug the charger AC power cord into the AC outlet, following the instructions given in
2.
section 8.
Start the vehicle, and turn on the vehicle’s headlights. Read the voltage on the digital
3.
display. If you get a reading between 13.4 volts and 14.6 volts, the alternator is
working properly. If the reading is less than 13.4 volts or more than 14.6 volts, have
the charging system checked by a qualified technician.
CALCULATING CHARGE TIME 12.
Find your battery’s rating on the chart below, and note the charge time given for each
charger setting. The times given are for batteries with a 50% charge prior to recharging.
Add more time for severely discharged batteries.
NR means that the charger setting is NOT RECOMMENDED.
XC75
BATTERY SIZE/RATING
CHARGE RATE/CHARGING TIME
3 AMP 5 AMP 10 - 20 AMP
SMALL
BATTERIES
Motorcycle,
garden,
tractor, etc.
6 - 12 AH 1¼ - 2½ hrs ¾ - 1½ hrs NR
12 - 32 AH 2½ - 6¾ hrs 1½ - 4 hrs NR
CARS/
TRUCKS
200 - 315 CCA 40 - 60 RC 7½ - 9½ hrs 4½ - 5¾ hrs 1¼ - 3 hrs
315 - 550 CCA 60 - 85 RC 9½ - 12¼ hrs 5¾ - 7½ hrs 1½ - 3¾ hrs
550 - 1000
CCA
80 - 190 RC 12¼ - 23¼ hrs 7½ - 14 hrs 1¾ - 7 hrs
MARINE/DEEP CYCLE
80 RC 11¾ hrs 7 hrs 1¾ - 3½ hrs
140 RC 18 hrs 10¾ hrs 2¾ - 5½ hrs
160 RC 20 hrs 12 hrs 3 - 6 hrs
180 RC 22 hrs 13¼ hrs 3½ - 6¾ hrs