Operation
90
Instructions for use Fabius plus SW 3.n
Standby page after start-up
In
Standby
mode, different instructions (A) and
information (B) are displayed on the screen.
A
To start operation press one of the keys
located to the left of the display
B
Last system test, last leakage/compliance test,
system leakage, ventilator leakage,
compliance
Setting the fresh-gas flow
The fresh-gas settings can be changed before a
ventilation mode is selected.
Set the fresh-gas flow.
S-ORC (Sensitive Oxygen Ratio
Controller)
Fabius is equipped with a mechanical minimum O
2
delivery (S-ORC). This safety device prevents
hypoxic gas mixtures if N
2
O is selected as the
carrier gas.
Starting at a flow of approx. 200 mL/min, the N
2
O
concentration in the fresh gas can be set to a value
between 0% and 75%.
When a lack of O
2
is present, the S-ORC limits the
N
2
O concentration in the fresh gas so that the O
2
concentration will not fall below 23 Vol%.
S-ORC inhibits the N
2
O flow under the following
conditions:
– N
2
O flow control valve is open, even though
the O
2
flow control valve is closed.
– O
2
flow is below 0.2 L/min.
With an N
2
O failure, O
2
can continue to be
supplied. An alarm is not triggered. The float in the
N
2
O flow tube drops to zero.
S-ORC has no oxygen-specific monitoring function
and offers no protection for the consequences of
an accidental interchange of gases.
Therefore, the O
2
concentration must always be
monitored.
25463
A
B
Standby