Schumacher SC1308 User Manual Download Page 4

7. FOLLOW THESE STEPS WHEN BATTERY IS OUTSIDE VEHICLE

WARNING: A SPARK NEAR THE 

BATTERY MAY CAUSE A BATTERY 

EXPLOSION. TO REDUCE THE RISK OF 

A SPARK NEAR THE BATTERY:

7.1 

Check polarity of battery posts. POSITIVE 

(POS, P, +) battery post usually has a larger 

diameter than NEGATIVE (NEG, N, –) post.

7.2 

Attach at least a 24-inch long 6-gauge 

(AWG) insulated battery cable to 

NEGATIVE (NEG, N, –) battery post.

7.3 

Connect POSITIVE (RED) charger clip to 

POSITIVE (POS, P, +) post of battery.

7.4 

Position yourself and free end of cable as 

far away from battery as possible – then 

connect NEGATIVE (BLACK) charger clip 

to free end of cable.

7.5 

Do not face battery when making final 

connection.

7.6 

When disconnecting charger, always do 

so in reverse sequence of connecting 

procedure and break first connection 

while as far away from battery as 

practical.

7.7 

A marine (boat) battery must be removed 

and charged on shore. To charge it on 

board requires equipment specially 

designed for marine use. 

8. GROUNDING AND AC POWER CORD CONNECTIONS

8.1 

This battery charger is for use on a 

nominal 120 volt circuit. The charger 

must be grounded, to reduce the risk of 

electric shock. The plug must be plugged 

into an outlet that is properly installed 

and grounded in accordance with all local 

codes and ordinances. The plug pins 

must fit the receptacle (outlet). Do not use 

with an ungrounded system.

8.2  DANGER:

 Never alter the AC cord or 

plug provided – if it does not fit the outlet, 

have a proper grounded outlet installed 

by a qualified electrician. An improper 

connection can result in a risk of an 

electric shock or electrocution. 

NOTE:

 Pursuant to Canadian 

Regulations, use of an adapter plug 

is not allowed in Canada. Use of an 

adapter plug in the United States is not 

recommended and should not be used.

8.3  USING AN EXTENSION CORD

The use of an extension cord is not 

recommended. If you must use an 

extension cord, follow these guidelines:

• Pins on plug of extension cord must be

the same number, size, and shape as

those of plug on charger.

• Ensure that the extension cord is

properly wired and in good electrical

condition.

• Wire size must be large enough for the 

AC ampere rating of charger, as specified:

Length of cord (feet)

25

50

100 150

AWG* size of cord

16

14

14

12

*AWG-American Wire Gauge

9. ASSEMBLY INSTRUCTIONS

9.1 

Remove all cord wraps and uncoil the

cables prior to using the battery charger. 

9.2 

Included with your charger are two cord 

wrap cleats for storage of the clamp 

cables. To install, align the two tabs with 

the two receptacles on the back of the 

charger and push until you hear a snap. 

10. CONTROL PANEL

DIGITAL DISPLAY

The Digital Display gives a digital

indication of voltage or % of charge. The

display will show the battery VOLTAGE

when the charger is not charging a

battery. When it goes into charging mode,

the display will automatically change to

ON

 (to show charging has started) and

then show the percent-of-charge of the

battery being charged and either 6 or

12 (the battery voltage determined by

the charger). If you manually stop the

charging process (by pressing the Rate

Selection button) before the battery is fully

charged, the display will show 

OFF

.

NOTE:

 During charging, the display will 

go into sleep mode and will not show the 

percentage of charge or voltage of the 

battery. To turn the display back on, press 

the Display button.

 DISPLAY BUTTON

Use this button to set the function of the 

digital display to one of the following:

 (Battery %) – 

The digital display 

shows an estimated charge percentage 

of the battery connected to the charger’s 

battery clamps.

 (Voltage) –

 The Digital Display shows 

the voltage at the charger battery clamps, 

in DC volts.

Summary of Contents for SC1308

Page 1: ...AL AND READ BEFORE EACH USE This manual will explain how to use the battery charger safely and effectively Please read and follow these instructions and precautions carefully MODEL SC1308 Automatic Ba...

Page 2: ...THE INSTRUCTIONS EACH TIME YOU USE THE CHARGER b To reduce risk of battery explosion follow these instructions and those published by battery manufacturer and manufacturer of any equipment you intend...

Page 3: ...sition and removing AC cord from electric outlet Never allow clips to touch each other 5 2 Attach clips to battery and chassis as indicated in sections 6 and 7 6 FOLLOW THESE STEPS WHEN BATTERY IS INS...

Page 4: ...tates is not recommended and should not be used 8 3 USING AN EXTENSION CORD The use of an extension cord is not recommended If you must use an extension cord follow these guidelines Pins on plug of ex...

Page 5: ...ed VRLA valve regulated lead acid batteries Popular uses include high performance engine starting power sports deep cycle solar and storage batteries 11 OPERATING INSTRUCTIONS WARNING A spark near the...

Page 6: ...uous 12 hour period it will go into abort mode see Aborted Charge section This is usually caused by a drain on the battery or the battery could be bad MAINTAINING A BATTERY The SC1308 charges and main...

Page 7: ...ery Voltage Reading 12V 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 Whe...

Page 8: ...arge voltage May be caused by trying to charge a large battery or bank of batteries on too low of a current setting Try again with a higher current setting or have the battery checked or replaced F04...

Page 9: ...and charges the battery No problem this is normal I press the display button but do not see the percentage of charge When first connected to a battery the display shows voltage only This is normal Th...

Page 10: ...0 sec max on 120 sec min off 100A int 5 sec max on 180 sec min off cUL Input 120V AC 60Hz 4A continuous 19A intermittent Output 6V 12V DC 2 6A int 25A int 60 sec max on 120 sec min off 90A int 5 sec m...

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