When calibrating a gas meter, what oxygen level will be shown?

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Multiple Choice

When calibrating a gas meter, what oxygen level will be shown?

Explanation:
During calibration you expose the sensor to a calibration gas with a known oxygen content and adjust the meter until its display matches that value. Using a gas with 100% oxygen as the calibration gas sets the upper reference, so the meter will show 100% when that gas is applied. This establishes the top end of the scale and ensures accurate readings across the range.

During calibration you expose the sensor to a calibration gas with a known oxygen content and adjust the meter until its display matches that value. Using a gas with 100% oxygen as the calibration gas sets the upper reference, so the meter will show 100% when that gas is applied. This establishes the top end of the scale and ensures accurate readings across the range.

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