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SERVICE
Restricted area.
MANUAL AIR ZERO
Use this function to reset toxic sensor to 0 ppm and the oxygen sensor to
20.95%.
It is recommended that sensors are purged in fresh (outside)
air for at least three minutes before zeroing. If the analyser is
zeroed with its probe still in the flue, erroneous reading may
result.
MANUAL PRS ZERO
Use this function to zero the pressure transducer.
It is recommended that all pressure hoses are disconnected from the
analyser before zeroing.
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