Larsen & Toubro Star 55, Operating Manual

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Star 55
Respiration Rate
The respiration rate is defined as the average rate of the patient's last 8
significant measured breaths. During the first 8 breaths the respiration rate
is calculated by averaging the available data. The module measures the RR
in range of 0 to 150 bpm.
Initialization Time
The module requires a typically a time of 30 seconds before entering into the
first operating mode. During this time, the module completes self test and
initialization procedures required for proper operation of the module.
"Auto Zero" Interval
The Auto zero process is performed only during measurement mode. the
module updates the ambient pressure that is measured during auto zero
process. the auto zero is triggered.
z
During the first hour after entering measurement mode, periodically for
durations of typically 15 seconds at a rate which limits the total time
consumed by auto zeros to less than 2% of the time in which active
m e a s u r e m e n t s a r e t a k e n . F o l l o w i n g t h e f i r s t h o u r a f t e r e n t e r i n g
measurement mode, periodically for durations of typically 15 seconds
at a rate of at most once per hour.
z
If a change of 8
0
C from the last auto zero is detected.
z
If a pressure change of 20 mmHg relative to the last auto zero (less
than the purge threshold) for a period of 30 seconds is detected. The
module will be able to detect a real change in the ambient pressure
and a pressure change due to partial blockage of the FilterLine.
The module prevents the triggering of an auto zero in the following situations:
z
In case of purging until the end of this state.
z
20 seconds to 3 minutes from the last detected breath.
z
While wait up to 5 minutes for host auto zero enable command.
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