3 Description of Design and Performance
12 SA-103-0109V1.3-HAO-GB © F. Stephan GmbH
The high precision flowmeter tube (at the left) indicates the measuring
range from 0 to 2 l/min, the "rough" flowmeter tube (at the right)
indicates the flow quantities from 2 to 15 l/min.
Reading line is the upper edge of the float. Graduation of the lower scale
parts of the measuring tubes (AIR/N
2
O) is more closely stepped.
Because the dimensions of the lateral parts of the GME 2/3 can be altered
optionally, the use of flowmeter tubes of other manufacturers (e.g. Rota,
KDG and others) is possible.
Fig. 2: Gas Mixing Unit
3.1.1 O
2
-Flush
Depressing the O
2
-flush-button effects a quick oxygen supply
(approximately 50 l/min) directly to the outlet for fresh gas ( not via the
vaporizer for anaesthetic agent).
Releasing the O
2
-flush-button effects return to the initial position.
3.1.2 AIR / N
2
O-Change-Over
The AIR/N
2
O-change-over-switch is situated below the respective control
knobs (AIR/N
2
O). It makes preselection of the gases AIR or N
2
O
possible. The appropriate proportioning of the gases is carried out by
means of the regulating valves O
2
-Failure Alarm.
In case of a decrease of pressure in the supply system (oxygen
lower than 2,8 bar ) an audible alarm sounds for at least 7 seconds.
No muting is possible.
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