Dräger Julian Operating Instructions Manual page 141

Anesthetic gas measurement
(infrared spectrometry)
Sample rate (selectable)
Delay time for sampling
Response time t 10...90
at 200 mL/min
at 60 mL/min
Accuracy
Display range for N O
2
Resolution
Accuracy
Display range for halothane
Resolution
Accuracy for
0 to 4 vol%
>4 to 8.5 vol%
Display range for isoflurane
Resolution
Accuracy for
0 to 5 vol%
>5 to 8.5 vol%
Display range for enflurane
Resolution
Accuracy for
0 to 54 vol%
>4 to 9.9 vol%
Display range for sevoflurane
Resolution
Accuracy for
0 to 6 vol%
>6 to 9.9 vol%
Display range for desflurane
Resolution
Accuracy for
0 to 15 vol%
>8 to 22 vol%
Automatic anesthetic gas identification
Cross-sensitivity
All data in % by volume at
1013 mbar current atmospheric pressure
60 mL/min or 200 mL/min
Less than 1 s (for a sample rate of 200 mL/min)
300 ms
1 s
The measurement accuracy required by DIN ISO 11196 is
attained at the latest 4 minutes after switching on the apparatus.
The threshold for automatic detection is 0.15% by volume.
To check the complete accuracy of Julian, a temperature
stabilisation time of 1 hour at 21°C should be observed.
The accuracy of the measuring equipment used should be at least
5 times and if possible 10 times higher than that of Julian.
0 to 100 vol%
0.1 vol%
Better than ±2 vol% absolute or ±3 % of measured value
0 to 8.5 vol%
0.1 vol%
0.15 vol% or 5 % of measured value
±10 % of measured value
0 to 8.5 vol%
0.1 vol%
0.15 vol% or 5 % of measured value
±10 % of measured value
0 to 9.9 vol%
0.1 vol%
0.15 vol% or 5 % of measured value
±10 % of measured value
0 to 9.9 vol%
0.1 vol%
0.15 vol% or 5 % of measured value
±10 % of measured value
0 to 22 vol%
0.1 vol%
0.15 vol% or 5 % of measured value
±10 % of measured value
Volatile anesthetic agents are automatically identified.
Manual selection is not necessary and not possible. In the case
of a mixture of two volatile anesthetic agents, the concentration of
the secondary anesthetic agent is displayed from a MAC value of
0.1 MAC. A secondary anesthetic agent becomes the main
anesthetic agent if its MAC value exceeds the MAC value of the
main anesthetic agent by 0.2 MAC. If a mixture of more than
2 volatile anesthetic agents is present, the display is blank.
None with respect to alcohol, acetone, methane, NO and CO.
Technical Data
Measuring Functions
141