Could not the calibration be completed completely? Did you receive an error message during calibration?

Could not the calibration be completed completely? Did you receive an error message during calibration?

The calibration cannot be fully completed if the membrane is leaking or not on the breathing unit. 

What is the membrane? The membrane is the small black sleeve with a white paper cover on the breathing unit. 

If the calibration is canceled before completion, the membrane should be replaced. 

You will receive a message in the app. The basic package contains a box with replacement membranes. Replace the membrane carefully.

Important: Only touch the membrane by the black sleeve. Do not touch the top side to avoid damaging the membrane!​

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