Schumacher Electric SI-200A Manual Para El Propietario página 47

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SPECIFIC GRAVITY
1.265
1.225
1.155
1.120
When you know the percent of charge and the Amp Hour (AH) rating of your
battery, you can calculate the approximate time needed to bring your battery to
a full charge.
To convert Reserve Capacity to Amp Hours, divide Reserve Capacity by 2, and
add 16:
Example:
Amp Hour Rating = Reserve Capacity + 16
NOTE: The Reserve Capacity can be obtained from the battery specification
sheet or the owner's manual.
To calculate the time needed for a charge:
1. Find the percent of charge needed. (A battery at 50 percent charge that will
be charged to 100 percent needs another 50 percent (.50)).
2. Multiply the Amp Hour Rating by the charge needed (.50) and divide by the
charge rate setting (2 amps).
3. Multiply the results by 1.25 and you will have the total time needed, in
hours, to bring the battery to full charge.
4. Add an additional hour for a deep-cycle battery.
Example:
Amp Hour Rating x % of charge needed x 1.25 = hours of charge
Charge Rate Setting
100 (AH Rating) x 0.50 (charge needed) x 1.25 = 3.125 hours
20 (Charge Rate Setting)
100 x 0.50 x 1.25 = 3.125
20
You would need to charge your 100 Amp Hour Battery for a little more than 3
hours at the 20 Amp charge rate using the above example.
The Chart Method
Use the following table to more accurately determine the time it will take to
bring a battery to full charge. First, identify where your battery fits into the
chart.
CCA = Cold Cranking Amps
Ah = Amp Hour
NR means that the charger setting is NOT RECOMMENDED.
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.
PERCENT OF CHARGE
100%
75%
25%
0%
2
42
• •
PERCENT OF CHARGE
NEEDED
0%
25%
75%
100%