H-1.601. 00137-B3.0
Page 49 of 81
Attention：
Do not use up any oxygen cylinder. Make sure there is residual pressure
inside the cylinder when it is returned so as to prevent entry of wet air into it
and corrosion caused thereby.
1. Check the pressure meter on the reducing valve to be aware of the
oxygen storage in it. Make replacement with a new oxygen cylinder if the
reading on pressure meter is 5 MPa (approx. 725 PSI) or lower.
2. Shut off the outlet valve on the oxygen cylinder.
3. At this moment a voice prompt "shut down oxygen cylinder" will be
given.
FIGURE 40 Shut down ventilator
5.10
Calculation of Storage Capacity/Operation
Duration
• Storage capacity of oxygen cylinder
Oxygen capacity = cylinder volume × cylinder pressure.
Example cylinder volume X cylinder pressure = oxygen storage capacity
• Ventilation Duration
Tidal Volume VT (L) × Respiration Frequency F (1/min) = Ventilation Rate MV (L/min)
Oxygen Storage Capacity（L）
100%
Ventilation Duration （min）=
×
MV(L / min) Oxygen Concentration
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