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3.0 Calibration
Oxygen Analyzers must be calibrated before each use. Improper calibration may result
in the use of incorrect breathing gas mixtures, which may cause serious injury or death
to the person using the gas mixture.
Calibration or use of the Analyzer with a low battery may result in inaccurate readings.
Inaccurate gas analysis can lead to serious personal injury or death.
If the Analyzer has been subjected to a recent change in ambient temperature, allow it to
stabilize for one hour before calibration.
When Analyzer calibration is performed at different atmospheric conditions than the gas
being measured, a calibration correction value may be required. Improper calibration
may result in the use of incorrect breathing gas mixtures, which may cause serious
injury or death to the person using the gas mixture.
3.1. Calibration Methods
Calibration should always be performed at the same temperature and humidity conditions as the
gas being measured. This is not always possible, for example, in a tropical environment where
dry breathing gas from a high-pressure Scuba cylinder will be measured after Analyzer
calibration has been performed in the warm, humid ambient air. Under these conditions a
calibration correction value may be required, as detailed in the Appendix, or dry air must be
used for calibration.
Obtain proper training before attempting special calibration procedures. Improper
calibration may result in the use of incorrect breathing gas mixtures, which may cause
serious injury or death to the person using the gas mixture.
Calibration in air at sea level is suitable for many applications; however, the closer the oxygen
content of the calibration gas is to the gas being tested, the more accurate the measurement
results. The following special applications require methods and training beyond the scope of
this manual:
• Analysis of gases containing greater than 50% oxygen requiring calibration with pure
oxygen or certified calibration gas
• Analysis of gases at altitudes above sea level requiring correction for reduced
atmospheric pressure, contact Nuvair for more information.
NUVAIR
Pro O
Oxygen Analyzer Operation Manual
2
WARNING
WARNING
NOTICE
WARNING
WARNING
9
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TM
Pro O
Oxygen Analyzer
2
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