72 Technical data
Inspiration/Air Mix
Valve rocker V6 is closed. This closes V7. O
2
flows
into injector unit V9 through V5 and sucks in air
through V7. The air-oxygen mixture flows to the
patient valve.
Expiration/Air Mix or No Air Mix
Another electrical impulse closes V2. Exhaust valve
V4 opens and exhausts injector unit V9. The patient
breathes out through the patient valve.
Patient valve
The respiratory gas flows into the patient’s airways
during inspiration. The expiratory pressure then
switches the valve over and enables the patient to
breathe out.
11.4 Resistance to interference
Resistance to radio interference is tested to EN 794-
3 at 10 V/m. Malfunctions may occur at higher field
strengths.
11.5 O
2
content when using Air Mix
The following diagram shows the oxygen concentra-
tion prevailing at various counter-pressures and min-
ute volumes when
Air Mix is switched on.
Inspiration
Expiration
Expiration
Inspiration
Medumat
Patient
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