KUSSMAUL AUTO CHARGE 1000 PUMP-PLUS 091-9-1000 Instruction Manual page 2

Introduction
The AUTO CHARGE 1000 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. The Auto Charge 1000 Pump Plus operates an 091-9 air compres-
sor. With the selector switch in the AC position the compressor runs only when the AC power
is applied. With the selector switch in the DC position the compressor will operate when the
AC power is on or off. In either position the compressor operates from the vehicle's batteries,
the Pump Plus automatically recharging the batteries as required.
The battery charger features:
• Electronic remote sensing of true battery voltages, eliminates the need
for sensing wires
• Automatic current limiting
• Built-in BATTERY SAVER
• Remote battery charge/condition indicator
Charge Controls & Electronic Remote Sensing
The Auto Charge 1000 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 fre-
quency is determined by the power line frequency. Therefore their are brief
intervals during which no charging current flows. During this brief interval the
Auto Charge 1000 Pump Plus measures and stores the battery voltage. This
battery voltage is compared to a standard and any error is detected and used to
control the charger output at the desired level. Their 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 over-
loaded due to the high charging current required. The Auto Charge 1000 Pump
Plus contains an automatic current limit. This circuit limits the output current to
the rated 15 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.