Physio Control LIFEPAK 500 - Functional Description

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LIFEPAK 500 automated external defibrillator Product Description
3-10
Functional Description Page 1 of 2
The LIFEPAK 500 AED is a portable, battery-powered therapeutic medical
device. It consists of the following components:
■ Main PCB—Aprinted circuit board that controls AED functions including
ECG signal processing, mode control, rhythm and motion analysis, Energy
Storage Capacitor charging, impedance sensing, voice prompting, audio
recording capability (except models without scene audio feature), and
waveform storage.
■ Biphasic PCB (LIFEPAK 500 Biphasic AED only) — A circuit board that
generates the biphasic waveform.
■ Inductive Resistor (LIFEPAK 500 Biphasic AED only) — A resistor that
conditions the Energy Storage Capacitor output for the wave generator/
regulator circuit on the biphasic board.
■ Wave-Shaping Inductor (LIFEPAK 500 Monophasic AED only) — An
inductor used to modify the Energy Storage Capacitor waveform in the
LIFEPAK 500 Monophasic AED. The inductor converts the waveform into the
proper output waveform.
■ Transfer Relay — (LIFEPAK 500 Biphasic AED): Two relays mounted on the
Main PCB that routes current from the energy storage capacitor.
(LIFEPAK 500 Monophasic AED): One relay mounted on the Main PCB that
routes current from the energy storage capacitor.
■ Energy Storage Capacitor — A metallized film capacitor used for energy
storage.