Meter and Switch Functions, Crank Starting

D.	METER AND SWITCH FUNCTIONS

BATTERY TYPE: You may select between two basic Battery Types: Regular or Deep Cycle Battery. Both settings operate automati- cally and will shut off when the battery is fully charged. Use the Regular for all wet-cell, lead-acid batteries. (This charger is not recommended for Gel-Cell and AGM batteries.) Use the Deep Cycle setting for all Deep Cycle wet-cell, lead-acid batteries. How can you tell your battery type? Deep Cycle batteries are usually marked as such. If not, the battery will fall under the category of "Regular" batteries. Most automotive batteries are considered "Regular" batteries.

Some Deep Cycle batteries are designed in a way that charg- ing them in the Regular setting is more suitable. When charg- ing a Deep Cycle battery, if the Full Charge indicator lamp does not become illuminated after a 24-hour charge period and the charge current as indicated by the ammeter is less than 8 amps, move the switch to the Regular setting. If the Full Charge indica- tor lamp still remains off after charging, you should disconnect the charger and have both the battery and charger profession- ally tested.

BATTERY TYPE SELECTOR

REGULAR BATTERIES ▲	▲ DEEP CYCLE BATTERIES
AUTOMATIC OPERATION	AUTOMATIC OPERATION

6 VOLT, 15 AMP: Used for charging medium and large size wet- cell, lead-acid 6 volt batteries. Do not charge small batteries such as used in motorcycles, lawn and garden equipment. (Manual Operation. Monitor frequently while charging a battery.)

12 VOLT, 2 AMP: The 2 amp automatic charge rate is recom- mended for charging small batteries and warming large ones. If used for maintaining the Full Charge level of larger batteries, limit the charge period to a few days at a time. (Automatic Op- eration.)

12 VOLT, 15 AMP: Used for charging medium and large size wet-cell, lead-acid, 12-volt batteries. (Automatic Operation.)

12 VOLT, 110 AMP ENGINE START: Used for crank starting of 12 volt vehicles. The Engine Start position should not be used for battery charging, doing so will cause the charger to overheat and then protect itself by cycling off and on. (Manual Operation.)

CHARGE RATE SELECTOR

▲	▲	▲	▲
15 Amp	2 Amp	15 Amp	110 Amp 12V
6V, Manual	12V Automatic		Engine Start

		DC AMPS
	CHARGING		START

0	5	10	15
	FULL		CHECK
	CHARGE		BATTERY

METER: The meter indicates the amount of current measured in amperes that is being drawn from the charger by a battery. In the 15 Amp charge rate a typical discharged battery may initially draw more than 15 Amps during the first few minutes of charge. As the battery continues to charge current should gradually taper to within 6 to 8 amps at full charge.

The START area of the meter is reserved to indicate when a high rate of current is being drawn from the charger. It is normal for the meter pointer to be in this area while cranking a vehicle.

When using the 2 amp charge rate the meter may indicate some activity but doesn’t have the resolution to accurately dis- play the battery’s state of charge. For this reason you should depend on the full charge light indicator.

CRANK STARTING:

1.Connect the charger as outlined in the “CHARGING BATTERY IN VEHICLE” section.

2.For best results charge the battery for 10 minutes before cranking the engine.

3.Set the charge rate selector switch to the 110 Amp start position that matches the voltage of the vehicle’s battery

4.Crank the engine for 3 seconds, if the engine fails to start, set the charge rate switch to the 15 Amp rate and charge the battery for the next 5 to 10 minutes before cranking again.

5.If the engine fails to start after several tries, there maybe a problem elsewhere with the vehicle.

SF-2150MA specifications

The Schumacher SF-2150MA is an advanced battery charger and maintainer, specifically designed to meet the dynamic needs of today's automotive enthusiasts and everyday drivers alike. This model is characterized by its solid build, intelligent charging system, and user-friendly design, making it a popular choice among consumers.

One of the standout features of the SF-2150MA is its microprocessor-controlled charging technology. This smart system allows the charger to automatically adjust the charging rate based on the battery’s needs. It employs multi-stage charging, which optimizes the charging process and ensures the battery is charged efficiently and safely. This feature not only prolongs the life of the battery but also enhances its performance.

The SF-2150MA is compatible with a wide range of battery types, including lead-acid, AGM, and gel batteries. This versatility makes it suitable for various applications, from cars and trucks to recreational vehicles and motorcycles. Furthermore, the charger operates with a 2-amp output, which is effective for maintaining batteries during long periods of inactivity, making it an ideal choice for individuals who own multiple vehicles.

Another significant characteristic of the Schumacher SF-2150MA is its smart maintenance mode. This mode provides a constant float charge that keeps the battery topped off, preventing overcharging while ensuring that it remains ready for use. The LED status indicator is another user-friendly feature that provides real-time updates on the charging status, making it easier for users to monitor the charging process without guesswork.

Safety is also a top priority with the SF-2150MA. Equipped with reverse polarity protection and short-circuit protection, the charger safeguards both the user and the battery from any potential hazards associated with improper connections. This emphasis on safety further enhances user confidence, especially for those who may be less experienced with battery maintenance.

Compact and lightweight, the Schumacher SF-2150MA is designed for portability, enabling users to easily store and transport the charger. Its intuitive design allows for straightforward operation, making it accessible for both novice and experienced users.

In conclusion, the Schumacher SF-2150MA combines cutting-edge technology, safety features, and user convenience in a compact package. Its ability to charge and maintain various battery types while ensuring efficient performance makes it a valuable tool for anyone looking to optimize their battery management strategy. Whether for everyday vehicle use or maintaining recreational vehicles, the SF-2150MA stands out as a reliable and effective battery charger.