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Press the
OK
key to execute a Zero cycle of all the gas sensors while the instrument is running in
ambient air. This procedure should last 60 seconds.
At the end of the zero period the AQ Expert reads the output of all gas sensors (with the exception of
the CO
2
sensor) and sets them all to zero, with the exception of the Oxygen (O
2
) that it sets to 20.9%.
If no error messages appear at the end of the countdown, place the
Si-AQ VOC Zero Filter
into a
sealable bag to prevent moisture from entering it.
Summary of Contents for SI-AQ VOC
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