68 EN MEDUVENT Standard
WM 67851 01/2021
6 Operation
6.7.2 Calculating operating time
1. Calculate the fill level of the oxygen cylinder (oxygen reserve):
2. Calculate operating time in accordance with the table below:
Result Operating time has been calculated.
After starting up, the device calculates oxygen concentration for
the first 30 seconds based on the ventilation parameters and flow
set. After 30 seconds, the device displays the actual measured
value.
Oxygen reserve = volume of oxygen cylinder x pressure in
oxygen cylinder
Example
Volume of oxygen cylinder 10 l 2 l
Pressure in oxygen cylinder 200 bar 200 bar
Fill level of oxygen cylinder
(oxygen reserve)
2000 l 400 l
Operating times of commercially-available oxygen cylinders
Set FiO
2
(l/min)
Operating time of oxygen cylinder
(hh:mm)
2 l volume 10 l volume
0.5 13:20 66:40
1 06:40 33:20
1.5 04:26 22:13
2 03:20 16:40
3 02:13 11:06
5 01:20 08:20
6 01:06 06:40
9 00:44 05:33
12 00:33 03:42
15 00:26 02:13
Time (min) =
Oxygen reserve (l)
Flow
( )
l
min
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