Schumacher SE 3612 - Manual (Page 5)

5 Sch487
CHARGE RATE*/CHARGING TIME - HOURS**
2 AMP 10 AMP 30 AMP 40 AMP 60 AMP
Motorcycle, Garden 6 - 12 AH 3-6
Tractor, etc. 12 - 32 AH 3 - 18
200 - 315 CCA 40 - 60 RC 13 - 20 2 ½ - 4 ½ - 1 ½ - ¾ NR
315 - 550 CCA 60 - 85 RC 20 - 35 4 - 7 1 - 2 ¾ - 2 ½ - 1
550 - 875 CCA 85 - 125 RC 35 - 55 7 - 11 2 - 7 2 - 3 1 - 2
55 MC 34 7 NR NR NR
80 MC 50 10 NR NR NR
105 MC 66 13 NR NR NR
Do not try to engine start a vehicle without a battery in it. You
may damage the vehicle’s system. If the engine spins, but doesn’t
start after several starting attempts, there is a problem with the
engine of the vehicle other than its starting system. STOP crank-
ing the engine until the other problem has been found and cor-
rected. 1. Set timer knob to the OFF position.
2. With the charger unplugged from the AC outlet, connect the
charger to the battery following instructions given in section
F.
3. Plug the charger AC power cord into the AC outlet, then
move timer from OFF to HOLD position.
4. Set the charge rate switch to the engine start position that
matches the vehicle battery and then crank the engine. Fol-
low the duty cycle printed on the panel of your charger for
proper ON / OFF times. (During extremely cold weather or
when the battery is severely exhausted, charge the battery
for about 5 minutes before cranking the engine).
5. If the engine fails to start, charge the battery for 5 more
minutes before attempting to crank the engine again.
6. After the engine starts, move the timer knob to the OFF po-
sition and unplug the AC power cord from the outlet before
disconnecting DC clips.
I. ENGINE START
*Charge Rates for this model are listed on the
front panel.
**Based on battery at 50% charge.
AH Ampere Hours
NR Not Recommended
CCA Cold Cranking Amps
RC
Reserve Capacity
MC Marine Capacity
SMALL
BATTERIES
CAR/TRUCKS
MARINE/
DEEP CYCLE
BATTERY SIZE/RATING
NR NR NR NR
J. CHARGE PERIOD
Determine the charge level of your battery with a hydrometer or electronic percent of charge tester. Determine the ampere hour rating of your battery. It
may be on the battery information label. If the battery is rated in Reserve Capacity, convert to ampere hour rating using the following formula:
Ampere Hour rating = (Reserve Capacity) + 16 Example: AH rating = (168 Reserve Capacity) + 16 or AH = 100
(2) (2)
"Reserve capacity is in minutes"
Use the following formula to determine the time of charge required: (AH x % of charge needed) divided by amp setting of the charger, times
1.25 = hours of charge:
Example: State of charge of the battery is 50%
Percent of charge needed is 100% - 50% = 50% (.50 decimal)
Ampere rating of the battery is 100AH
Charger setting is
10 amps
100 x .50 = x 1.25 = 6.25 hours of charge needed
10 + 1.00 hour more if charging a deep cycle battery
7.25 hours total for a deep cycle battery.
A hydrometer reading of the specific gravity of the electrolyte (fluid) of the battery in good condition should be between 1.25 and 1.28.
When a battery reaches 80-85% of full charge, bubbles will appear on the surface of the fluid. As the battery nears full charge, bubbling will become
more vigorous.
K. BATTERY CHARGING
NOTE: These battery chargers are not automatic and can
overcharge a battery if permitted to operate for ex-
tended periods of time. Monitor the charging often.
CHARGER MUST BE ASSEMBLED BEFORE USING.
1. Before charging any battery, make sure the electrolyte (battery
liquid) in each cell is at correct level.
2. Set the timer knob to the OFF position.
3. If the battery is being charged inside the vehicle, use connection
procedures outlined in Section F. Should the battery be removed
from the vehicle, follow the instruction in Section D, step 6 and
Section G. Plug the power cord into the AC outlet.
4. Set the charge rate switch to the desired charge position. See
Charge Rate Charts.
5. Set the timer from OFF position to desired timed charge, 30-150
minutes.