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Instructions for accurate testing
In order to achieve a certain degree of accuracy when conducting flue gas analysis, the following should be
respected:
the boiler being checked should be running in steady state conditions.
the flue gas analyzer should be switched on at least 3 minutes before testing (time to auto-calibrate) with the
probe located in fresh air.
the point in which the probe is inserted for analysis has to be at a distance of approximately twice the stack
diameter or, alternatively, as directed by the boiler manufacturer.
the water trap should be completely empty and positioned vertically.
before switching off the instrument, extract the probe and wait at least 3 minutes (the CO value has to drop
below 10 ppm).
Before returning the instrument to its place, clean the water trap and relative hose; if water is present in the
hose clean the latter by blowing inside.
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