Dräger Fabius, Instructions For Use Manual, Page: 86 / 232

Operation
86
Instructions for Use Fabius MRI SW 3.n
Power-Up Standby Screen
Following a successful power-up, the Standby
screen appears and provides instructions on start-
ing the operation of the Fabius MRI.
Setting Fresh Gas Flow
Set the fresh gas flow to the desired concentration
using the flow control knobs on the front of the
machine.
S-ORC (Sensitive Oxygen Ratio Controller)
S-ORC is a control element which guarantees a
minimum O
2
concentration in the fresh gas flow. As
from a flow rate of approx. 300 mL/min, the N
2
O
concentration in the fresh gas can be freely set
between 0 and 75 %.
During O
2
shortage S-ORC limits the N
2
O concen-
tration in the fresh gas, so that the O
2
concentration
does not drop below 23 vol.%.
S-ORC prevents N
2
O flow if the N
2
O metering
valve is open and O
2
metering valve closed or if the
O
2
flow is less than 0.2 L/min.
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