LUCAS® 2 Chest Compression System – Service Manual
3323809-001, © 2017 Physio-Control, Inc.
10
3. The Function of LUCAS
3.1. Electronics System
3.1.1. The Battery
LUCAS is driven by a rechargeable Lithium Ion Polymer (LiPo) battery. The battery can be
charged during operation by an external Power Supply, connected to a wall outlet, or with a
car power cable. You can also remove the battery from LUCAS and recharge it in a
separately sold battery charger of desktop model.
IMPORTANT: The battery must be connected even when the device is supplied by the
power supply.
The battery is mechanically keyed to LUCAS and the battery charger to make sure you get
the correct installation. The top of the battery has connections for power and
communication to the battery charger and to LUCAS.
The battery has built in intelligence to monitor the number of usage cycles and battery age to
tell the user when to replace the battery. The battery intelligence also monitors the battery’s
internal temperature.
The battery supplies power to the electronics and the electrical motor. The motor is
connected to the linear unit via a drive belt.
3.2.1. The Printed Circuit Boards
The electronics is divided into three parts that are situated on two separate PCB’s:
• The Control System that controls the motor with information from the user interface
and from the rotation and linear sensors.
• The Protective System that controls inputs and outputs and shut off in case of a
problem.
• The internal Battery Charger that controls the charging sequence of the battery.
There are two separate linear measuring sensors that monitor the movement of the Suction
Cup. One is for the Control System; the other one works as a reference to the Protective
System.
The User Control Panel is the user interface with which the device can be controlled and
monitored through six button switches and a number of LED’s. The User Control Panel is
situated on the hood and is connected to the protective/charger system that sends the
signals to the control system. For further details on the User Control Panel please read
chapter 2.7 in the Instructions for Use which also explains the different states on the Battery
indicator.
An electrical fan is situated at the bottom of the device for cooling the electrical motor and
other electronics. The fan starts when the internal temperature reaches 40°C and stops
when the temperature is below 30°C.
See pictures on the following page.
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