Technical data
236 Instructions for use Perseus A500 SW 2.0n
Detection Automatic
Primary gas At the latest at 0.3 Vol%
Secondary gas At the latest at 0.4 Vol% or 0.1 xMAC (the larger
value applies)
With a desflurane concentration greater than
4 Vol%, mixture detection occurs at the latest
when the concentration of the second anes-
thetic gas rises above 10 % of the desflurane
concentration.
The secondary gas becomes the primary gas
when the expiratory xMAC value is more than
0.2 xMAC above that of the primary gas.
Minimum displayed concentration The specified detection thresholds refer to rising
anesthetic gas concentrations (e.g., at the start
of an operation). If the anesthetic gas concen-
tration falls, a concentration of down to
0.05 Vol% will be measured, based on the last
anesthetic agent detected. Below this concen-
tration, a value of 0 Vol% will be displayed.
xMAC Based on patient age, anesthetic agent, and
nitrous oxide concentration
(the xMAC is corrected for ambient pressure)
Range 0 to 9.9
Accuracy Corresponds to that of the gas measurement
Resolution of displayed value 0.1
Measurement of supply pressures
Central supply
Range 0 to 9.8 kPa x 100
0 to 140 psi
0 to 0.98 MPa
Accuracy ±4 % or ±0.2 kPa x 100 (the larger value
applies)
±4 % or ±3 psi (the larger value applies)
±4 % or ±0.02 MPa (the larger value applies)
Resolution of displayed value 0.1 kPa x 100
1psi
0.01 MPa
Gas cylinders
Range 0 to 250 kPa x 100
0 to 3600 psi
0 to 25 MPa
Measuring systems and displays (continued)
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