What is needed to properly calibrate your O2 Analyzer?

To properly calibrate your O2 Analyzer, it is essential to use various gas mixtures, including pure oxygen, premixed Nitrox, and air. Each of these gases allows for accurate calibration at different points on the O2 scale.

Using pure oxygen is critical because it represents 100% O2, and it helps establish a reference point for the analyzer's readings. By calibrating with 100% O2, you can ensure that the analyzer correctly identifies and measures high concentrations of oxygen, which is necessary for diving with enriched air nitrox.

Premixed Nitrox is also important as it typically contains various percentages of oxygen, situated between atmospheric air and pure oxygen (such as 32% O2 or 36% O2), which allows you to calibrate the analyzer for specific nitrox mixtures that divers may use.

Lastly, calibrating with air, which contains about 21% O2, is vital for establishing the lower end of the scale. This ensures that the analyzer can accurately detect and measure lower concentrations of oxygen, which is essential for safety in diving with different gas mixtures.

Thus, to achieve proper calibration, using all of these gases is necessary, confirming that the correct answer encompasses the importance of each gas used in the calibration