P a g e 18 SAF’IR EVOLUTION Instruction Manual
Monitoring exhalation flow
A flow pressure sensor, connected to the sampling port, monitors exhaled air pressure.
When the flow reaches 7.5 hPa, a tone is heard. The tone stops when the required volume of
breath is delivered.
Standby mode
When the instrument is switched off and connected to
the main supply, the standby mode is activated.
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