WEBVTT

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The spirometer sensor is susceptible 
to thermal drift of the baseline signal.

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Therefore, you must reset the baseline
by selecting the Zero Inputs button 

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before making any new recordings.

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Leave the spirometer undisturbed on the bicycle.

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Then select the Zero Inputs button.

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This will reset the offset of the Flow channel to zero.

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Put the nose clip on the volunteer’s nose.

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Select Start

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The mouthpiece can now be inserted into the volunteer's mouth.

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Observe the incoming data in the data panel.

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The flow channel should display
a positive deflection when exhaling.

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When the volunteer has become accustomed to the
 apparatus and is breathing normally, select Stop.