7
Performance Test
24 SA-103-0109V1.3-HAO-GB
©
F. Stephan GmbH
7.2 O
2
-Flush
Do not use in the application described above. You will destroy the
manometer.
Prior to putting the apparatus into service, it must be verified, that the O
2
-
flush-valve closes immediately and automatically after the key has been
released. For this test, the flush-key must be depressed briefly. When
released, it must return immediately to its initial position.
7.3 Air
/
N
2
O-Change Over (Basic setting)
O
2
- proportioning valve closed
N
2
O-proportioning valve set at 3 l/min
Proportioning valve for AIR set at 3 l/min
Change-over-switch in "N
2
O" – position
Suction system for anaesthetic gas connected
O
2
-monitor calibrated and in operation
7.3.1
Execution of the Test
The flowmeter tube for N
2
O must indicate 3 l/min, while the
flowmeter tube for compressed air must give a reading of zero. The
O
2
-monitor indicates ca. 0% O
2
( after a brief delay ).
When changing over from N
2
O to AIR (Change-over-switch)
without altering the settings of the proportioning valves
the float of the N
2
O-flowmeter tube must return to zero, while in
parallel the reading of the flowmeter tube for compressed air must
rise to 3 l/min. As a confirmation, the O
2
-monitor shows a reading of
21 % O
2
.
Attention