Larsen & Toubro Star 55, Operating Manual

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Leak Tightness
The leak rate of the module flow system is less than 40 mBr per minute
when a 30% vacuum is invoked on the flow system.
FilterLine Recognition Safeguard (FRS)
The "FRS" enables the module to detect the presence of the FilterLine at
startup and in normal operation. The pump doesn't draw in gas from the input
port when a FilterLine is not connected. While in normal operating mode the
"FRS Lock" detection time is no longer than 1 second.
Purge
The module performs a purging whenever it detects an occlusion in the
FilterLine or in the airway adapter. The module informs the host of the purge
situation by setting the "Purging in progress" bit in the Wave Message While
purging, the CO
2
values are invalid. The duration of the purging is up to 30
s e c o n d s .
The module recovers from occlusion when FilterLine is replaced. The module
then shifts to initialization mode for typically less than 5 seconds and then goes
to normal measurement mode.
Definitions
Breath : A r i s e a n d f a l l i n t h e c a r b o n -
dioxide concentration of at least
one percent carbon-dioxide is no
less than 0.4 seconds.
One inha One exhalation
= One Breath.
Respiration Rate (RR) : Number of Breaths per Min.
2.20