B: Theory of Operation Functional Descriptions
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EtCO
2
The DFM100 supplies a 5V DC power to an external EtCO
2
sensor which performs all measurements
and transfers the data to the DFM100. The DFM100 supports mainstream and sidestream CO
2
sensor.
Audio
The Efficia DFM100 has three types of audio output: voice prompts, tones, and “chirp” when there is a
“Red X” RFU condition. The voice prompts and tones are generated and controlled by the Processor
PCA, which also amplifies the signals and passes them directly to the speaker via a wire pair.
When the device is turned off, the audio controller on the Therapy PCA remains active and powers the
audio amplifier on the Processor PCA as needed to produce the “chirps” through the same amplifier.
Data Storage
The Efficia DFM100 has the capability of storing the following information:
• Patient data — acquired during an event.
• Configuration data — set up by the user to define specific settings related to the behavior of the
device.
• Support data — generated by the device to support the maintenance and service of the device.
• Device data — set up by the manufacturer to define installed options, serial numbers, etc.
The data are stored on the SOM PCA and can be imported or exported via a USB flash drive.
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