Dräger Perseus A500 Instructions For Use Manual page 234

Technical data
Measuring systems and displays (continued)
Elastance
Range
Resolution of displayed value
Gas measurement
Sample gas flow
Maximum time until emptying of the water
trap is necessary
System response time
Sensor sampling rate
Time after switch-on until the specified accu-
racy is attained
Time until CO measured values are dis-
2
played with reduced accuracy
Typical delays
Cross sensitivity
234
E
0.005 to 10 hPa/mL (cmH
0.001 hPa/mL (cmH O/mL)
2
Sidestream gas measurement (The sample gas
is fed back into the breathing system and
included in calculations for measurements and
delivery);
All values are measured under ATPS condi-
tions;
Sample gas flow standardized to STPD condi-
tions.
The measurement is corrected for ambient pres-
sure.
Due to the T time and the sampling rate,
10...90
the accuracies of the measured values for O
CO , N O, and anesthetic agent may deviate at
2 2
respiratory rates of 75 /min or higher and an I:E
ratio of 1:2. The influence of respiratory rate and
the I:E ratio on the accuracy has been verified in
a simulated breathing system using a rectangu-
lar waveform for the gas concentration.
End-tidal measured values are calculated for
each breath from the local maxima and minima
of the real-time measurements during expira-
tion.
200 mL/min ±10 %
41 h (sample gas under BTPS conditions at
23 °C ambient temperature)
The system response time results from the typi-
cal delay and the gas type specific T
<50 ms
<500 s
<90 s
<5 s
None with respect to alcohol (<3000 ppm in
blood),
Acetone (<1000 ppm), methane, water vapor,
NO and CO
Instructions for use Perseus A500 SW 2.0n
O/mL)
2
,
2
time.
10...90