10
Operating Instructions EEBC302A
6. Set Length of Charge Timer to HOLD.
7. Observe DC AMPS. Some reading should be evident.
— If OK, allow to stabilize for 5 minutes. Recheck DC
AMPS reading.
— If not, set Length of Charge Timer to OFF.
Determine reason for no reading. Correct before
proceeding.
8. Determine battery capacity. Capacity is usually marked
on battery and rated in:
— Ampere-Hours (AH),
— Reserve Capacity (RC), or
— Cold Cranking Amps (CCA).
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✓✓
Battery capacity is used in step 9 to determine charge
time.
9. Determine charge time using
Chart 1
.
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A battery charged 25% or lower may easily freeze,
charge immediately.
Chart 1:
Determining Length of Charge Using State of Charge and Capacity
STATE-OF CHARGE
STATE-OF-CHARGE 100% 75% 50% 25% DEAD
6 & 12V Specific Gravity 1.260 1.225 1.185 1.140 1.110
12V Open Circuit Voltage 12.6 12.4 12.1 11.9 11.8
6 V Open Circuit Voltage 6.3 6.2 6.1 6.0 5.9
BATTERY CAPACITY
6V Battery Voltage 12V
SMALL MEDIUM LARGE Battery Capacity SMALL MEDIUM LARGE
100 155 200+ Ampere hours 40 60 80+
160 275 430+ Reserve Capacity 60 90 100+
500 700 900+ Cold Cranking Amps 300 400 500+
LENGTH OF CHARGE TABLE
BA
TTERY CAPACITY % CHARGE BEGINNING AMPS CHARGE RATE
Small 0-25 45 30 30 25 25 20
25-50 30 20 20 15 15 10
50-75 15 10 10 10 5 5
Medium 0-25 70 50 45 40 35 30
25-50 45 30 25 20 20 20
50-75 25 15 15 15 10 10
Large 10-25 90 55 55 50 45 45
25-50 60 40 34 30 30 30
50-75 30 20 20 15 15 15
APPROXIMATE MINUTES OF CHARGE 15 30 45 60 75 90
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