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7 Performance Test
© F. Stephan GmbH SA-103-0109V1.3-HAO-GB 27
7.5.2 Execution of the Test
While observing the respiratory pressure gauge (2), the zero-position
of which has been verified beforehand, cautiously open the flow-
regulating valve for oxygen, until the pressure gauge comes to a
standstill at constantly 60 mbar.
Read off the quantity of escaping gas at the corresponding flowmeter
tube
If leakage is less than 250 ml/min, the circle system is sufficiently
tight for operation
If the value of 250 ml/min is exceeded, the following items must be
checked:
Tightness of connecting tapers
Tightness of screw joints
Packings and O – rings
Corrugated tubes for damages
If after a repeated tightness test the inadmissibly large leakage could
not be eliminated, the service department must be notified.
7.6 Test of the pressure-regulating valve
Fig. 6: Y – piece, feed line for control gas, rspiratory pressure gauge
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