Kussmaul Electronics 091-9-1200 - Manual (Page 2)

INTRODUCTION
The AUTO CHARGE 1200 PUMP PLUS is a compact, completely automatic, single
channel battery charger designed for vehicles with a single battery system. The charger
is ruggedized to withstand the shock and vibration encountered by vehicle mounted
equipment.
FEATURES
• Electronic remote sensing of true battery voltage, eliminates the need for sensing
wires
• Automatic current limiting
• Remote Battery charge/condition indicator display
• LED status indicators
• Pump output with AC or DC mode rocker switch
FUNCTIONALITY
Charge Controls & Electronic Remote Sensing:
The Auto Charge 1200 Pump Plus contains a precision voltage controller to maintain the
battery’s charge. Automatic electronic remote sensing measures the true battery voltage,
eliminating the need for the additional sense wires. The output current of any charger is
inherently a series of pulses whose frequency is determined by the power line frequency.
Therefore, there are brief intervals during which no charging current flows. Since there is
no charging current there is also no voltage drop between the charger and the battery. The
Auto Charge 1200 Pump Plus measures and stores the true battery voltage. This battery
voltage is compared to a reference voltage, any error detected is then used to control the
charger output at the desired level. There is no “trickle charge” and therefore no danger
of overcharging and water boil-off.
Automatic Current Limiting:
When batteries are severely discharged, some battery chargers can be overloaded due
to the high charging current required. The Auto Charge 1200 Pump Plus contains an
automatic current limit. The current limit feature limits the output current to 40 amperes
when charging a deeply discharged battery or if the starter cranks the engine while
charging. The current limiter thus eliminates the need for an ignition interlock circuit.