Oxygen Sensor - ABB EasyLine EL3000 Operating Instruction

EL3000 CONTINUOUS GAS ANALYZERS | OI/EL3000-EN REV. D

Oxygen sensor

Stability
The following data only applies if all the influence variables (e.g.
flow, temperature and air pressure) are constant.
Linearity error
Linear in the range > 1 vol.% O
Repeatability
≤ 0.5 % of span
Zero drift
Stable over long-term due to absolute zero point
Span drift
≤ 1 % of the measurement range per week
Output signal fluctuation (2 σ)
≤ 0.2 % of the total measurement range at electronic
T -time (static/dynamic) = 5/0 sec
90
Detection limit (4 σ)
≤ 0.4 % of the total measuring range with electronic T
(static/dynamic) = 5/0 sec
2
-time
90
Influences
Flow effect
Flow rate in the 20 to 100 l/h range:
≤ 2 % of the total measuring range
Temperature effect
Ambient temperature in the range of 5 to 40 °C:
≤ 0.2 vol.% O per 10 °C
2
Air pressure effect
• at the zero point:
no influence effect
• on sensitivity without pressure correction:
≤ 1 % of the measured value per 1 % of air pressure
change
• on sensitivity with pressure correction:
≤ 0.2 % of the measured value per 1 % of air pressure
change
Pressure correction is possible only if the oxygen sensor
is connected to the Uras26 infrared photometer with
integrated pressure sensor,
Dynamic response
T time
90
T ≤ 30 sec for sample gas flow = 60 l/h and electronic T
90
time (static/dynamic) = 5/0 sec
211
90