Chapter 4: T
echnical Specifications
The Spirometry Source
91
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RANGES AND MEASUREMENTS
Turbine
•Measurement Scale (BTPS)
Flow (l/s)
0 to ± 16
Volume (l)
0 to 10
•Dynamic flow resistance
kPa/l/s
< 0.122 to 14 l/s
•Precision of measurements (BTPS)
Volume (the highest)
3% or 50 ml
Flow (the highest)
5% or 150 ml/s
Time-related precision
0.5%
•Resolution in volume (ml)
< 6
•Sampling frequency (Hz)
25
•Turbine lifetime
600 disinfections
or 3 years
SpO
2
and Pulse
SpO
2
(%)
Pulse (BPM)
Measurement Range
0-100
0-250
Resolution
1
1
Precision 70 to 100
+/- 2
+/- 1 or 3%
(the highest)
< 70
Not specified
4.3 MICRO CONTROLLER
System micro controller:
•Hitachi H8S2144