Information On Drägersensor O (6809720) - Dräger Polytron 7000 Instructions For Use Manual

Information on DrägerSensor O
Principle of measurement:
Reaction at the measuring electrode:
Reaction at the counter-electrode:
Ambient conditions:
Operational Characteristics
Storage
Measured value time setting:
t
0...20
t
0...90
Calibration:
Flow rate:
Zero gas
Calibration gas
Warming-up time:
Sensor is ready to operate after
Sensor is ready to calibrate after
(6809720)
2
The DrägerSensor O (6809720) is an electrochemical two-electrode-sensor for measurement of oxy-
2
gen (O ) in air. The sensor can only be operated in connection with a suitable Dräger transmitter.
2
– –
O + 2 H O + 4 e => 4 OH
2 2
–
2 Pb => 2 Pb + + 4 e
2
o o
–5 C to 40 C, temporarily –20
700 hPa to 1300 hPa
10 to 95 % relative humidity, non condensing
o o
0 C to 40 C
700 hPa to 1300 hPa
30 to 70 % relative humidity, non condensing
<12 seconds
<30 seconds
Note: In the case of temperatures below –5
0.5 L/min
Nitrogen (99.9 Vol.-% N )
2
Oxygen / nitrogen – mixed gas
≤15 minutes
≤2 hours
Metrological certificate of approval
o o
C to 55 C
o
C, the measured value time setting may increase.
119