GE Baker Hughes oxy.IQ User Manual page 22

Chapter 2. Installation
2.3 Installing an Oxygen Sensor (cont.)
9. Begin the flow of the process gas. The analog output reading will
drop as the oxygen sensor adjusts to the reduced oxygen level.
During this time, reset the range as required.
10. For improved accuracy in the ppm oxygen ranges, a span gas
calibration should now be performed (see "Span Gas Calibration"
on page 19).
IMPORTANT:
Sensor life is dependent on the application. High oxygen
concentrations and contaminants such as acidic gases
will shorten the sensor life.
12 oxy.IQ User's Manual