Schumacher Electric SE-4022 Operations Instructions download pdf (Page 10)

• 10 •

•Yellow or Red, but the needle remains

steady – Indicates that the battery

capacity is not satisfactory. The battery

may be either defective or not fully

charged. Check the specic gravity of

the battery to see which condition exists.

If charging does not bring the battery up

to a full charge, the battery should be

replaced.

•Yellow or Red, but the needle continues

to fall – Indicates the battery may be

defective or run-down. Release the load

switch and note the voltmeter reaction.

Voltage recovery into the green or above

within seconds indicates a defective

battery. A slow recovery indicates a run-

down condition. For best results, check the

specic gravity of the battery.

FAN OPERATION

It is normal for the fan to be on all the

time. Keep the area near the charger

clear of obstructions to allow the fan to

operate efciently.

12. CALCULATING CHARGE TIME

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.

Example:

Amp hour rating = Reserve capacity + 16

2

NOTE: The Reserve Capacity can be

obtained from the battery‘s specication

sheet or the owners manual.

To calculate the time needed for a charge:

1. Find the percentage of charge needed.

2. Multiply the Amp hour rating by the

charge needed, and divide by the

charge rate.

3. Multiply the results by 1.25 to nd the

total time needed, in hours, to bring

the battery to full charge.

4. Add an additional hour for a deep-cycle

battery.

Example:

Ah rating x % of charge needed x 1.25 = hrs of charge

Charger Amp setting

100 (Ah rating) x .50 (charge needed) x 1.25 = 3.125 hrs

20 (Charger Setting)

100 x .50 x 1.25 = 3.125

20

You need to charge a 100 Ampere hour

battery for a little more than 3 hrs at the 20

Amp charge rate, using this example.

Use the following table to determine the time

it will take to bring a battery to full charge.

Ah – Ampere Hours

NR – the charger setting is NOT

RECOMMENDED.

CCA – Cold Cranking Amps

RC – Reserve Capacity

The times given are for batteries with a

50% charge prior to recharging.

BATTERY SIZE/RATING

CHARGE RATE/CHARGING TIME

1.5 A 2A 4A 10A 15A 30A 35A 40A 60A 80A

SMALL

BATTERIES

Motorcycle,

garden tractor, etc.

6-12 Ah

2¾-5

h

2-3¾

h

1-2 h NR NR NR NR NR NR NR

12-32 Ah

5-13¼

h

3¾-

10 h

2-5 h NR NR NR NR NR NR NR

CARS/

TRUCKS

200-315 CCA 40-60 RC

15-

19¼ h

11¼-

14½ h

5¾-

7¼ h

2¼-3

h

1½-2 h ¾-1 h

40-50

min

½-¾ h

23-29

min

17-22

min

315-550 CCA 60-85 RC

19¼-

24½ h

14½-

18¼ h

7¼-9 h

3-3¾

h

2-2½ h

1-1¼

h

50-60

min

¾-1 h

29-37

min

22-28

min

550-1000 CCA

85-190 RC

24½-

46¼ h

18¼-

34¾ h

9-17½

h

3¾-7

h

2½-

4½ h

1¼-

2¼ h

1-2 h

1-1¾

h

37-70

min

28-52

min

MARINE/DEEP CYCLE

80 RC 23½ h 17½ h 8¾ h 3½ h 2¼ h NR NR NR NR NR

140 RC 36 h 27 h 13½ h 5½ h 3½ h NR NR NR NR NR

160 RC 40 h 30 h 15 h 6 h 4 h NR NR NR NR NR

180 RC 44 h 33 h 16½ h 6½ h 4½ h NR NR NR NR NR

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 26 27

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