Dräger Polytron 8100 Notice D'utilisation page 41

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10.1.3 DIN EN 50104 for DrägerSensor O
Sensor Principle
The DrägerSensor O
LS (6809630) is an electrochemical
2
three-electrode sensor for measuring Oxygen (O
air.
NOTICE
i
i
The sensor cannot be used for Oxygen measurements
in the presence of Helium!
Reaction at electrodes
Measuring electrode
O
Counter electrode
2 H
Environmental parameters
Pressure
20.7 to 38.4 in. Hg (700 to1300 hPa)
Humidity
5 to 95%RH, non-condensing
Temperature
-40 to +60 °C, short term up to +65 °C
Storage temperature
0 to +40 °C
Storage humidity
5-95%RH, non-condensing (relevant
if sensor package is opened)
Influence on environmental parameters
Temperature
In the range -40 to 65 °C
Zero point
< ± 0.3 Vol% O2
Span
< ± 0.3 Vol% O2
Pressure
In the range 700 to 1300 hPa
Zero point deviation
< ± 0.1 Vol% O2
Span: Relative deviation from reading at 1013 hPa: < 2% of
measurement value / 100 hPa
Humidity
In the range 5% r.H to 95% r.H
Zero point
no relevant influence
Span: Relative deviation from reading at 50% r.H: < 2.5% of
measurement value
Dräger Polytron 8100
LS (6809630)
2
) in ambient
2
+
+ 4 H
+ 4 e
=> 2 H
O
2
2
+
O => O
+ 4 H
+ 4 e
2
2
Response time
t
< 14 seconds
0...20
t
< 45 seconds
0...90
For measurement range: 0-5 Vol% O2
t
< 10 seconds
0...20
t
< 27 seconds
0...90
For measurement range: 0-25 Vol% O2
In the measurement range 0-5 Vol% the t
(15 seconds) is higher than the permissible limit of the
EN 50104.
Stabilization time
5 x t
Calibration
Flow rate
0.5 L/min
Zero gas
Nitrogen (99.9 Vol% N
Target gas
Oxygen / Nitrogen gas mixture
Recommended calibration interval
9 month
Selectable range:
1 day to 18 months
Warm-up time
Operation
< 20 minutes
Calibration
< 6 hours
Measurement range
0-5...25 Vol% O2, 0-25 Vol%
O2 minimum reading: -1.25 Vol% O2
Technical data
response time
0...20
0...90
)
2
41

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