6.2.8 Pre-use check Tests
Remedy if test failsDescriptionTest
Make sure the patient unit front cover
and the user interface rear cover are
correctly mounted.
Audio test and other internal tests
(memory and safety-related hardware).
Internal test
Check the barometric pressure value in
the Status Window.
Checks the barometric pressure
measured by the internal barometer.
Barometer test
Check that the gas supply pressure (air
and O
2
) is within the specified range. See
page 148 for specification.
Checks that the gas supply pressures
(air and O
2
) measured by the internal gas
supply pressure transducers are within
the specified range.
Gas supply test
If message Leakage or Excessive leakage
appears:
• check that the test tube is correctly
connected,
• check all connections for the
expiratory cassette and inspiratory
channel,
• make sure the expiratory cassette and
the inspiratory channel are clean and
dry, OR
• contact a service technician.
Checks for internal leakage, with test
tube connected, using the inspiratory and
expiratory pressure transducers.
Allowed leakage: 10 ml/min at 80 cmH
2
O.
Internal leakage test
If the Internal leakage test passed (see
above):
• check/replace inspiratory or expiratory
pressure transducer
• check that there is no excess water in
the expiratory cassette
Calibrates and checks the inspiratory and
expiratory pressure transducers.
Pressure transducer
test
Check the inspiratory section:
• check that the safety valve membrane
is correctly seated in the inspiratory
pipe
• check that the inspiratory pipe is
correctly mounted in inspiratory
section
• check that the safety valve closes
properly when the Pre-use check is
started (distinct clicking sound from
the valve)
Checks and if necessary adjusts the
opening pressure for the safety valve to
117 ± 3 cmH
2
O.
Safety valve test
110
SERVO-s VENTILATOR SYSTEM V8.0, User's Manual
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