The first step in analyzing enriched air is to:

The first step in analyzing enriched air is to calibrate the oxygen analyzer. Calibration is essential because it ensures that the readings obtained from the analyzer are accurate. The effectiveness of an oxygen analyzer relies on its ability to provide reliable measurements of the gas composition within a tank. If the analyzer is not properly calibrated, any measurements taken will not reflect the true oxygen content, leading to potential safety risks while diving.

Additionally, even quality analyzers can drift over time or may have been affected by environmental conditions or previous usage. Calibration typically involves adjusting the analyzer to a known standard, often using clean, pure oxygen or atmospheric air to set a baseline. By performing this step first, divers ensure they have correct data before proceeding with any other steps in the process, such as measuring tank pressure or inspecting the cylinder. This practice helps maintain safety and accuracy in diving operations.