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7. MEASURING GASES
After the countdown is finished and the analyser is correctly set up
sampling can take place either by using a sampling tube/probe to reach
into ducts or flues or simply by taking a direct ambient air measurement
without a probe or hose connected.
CAUTION: Just by breathing you are emitting a relatively high level of
CO
in the local area and this can affect the measurements. We do
2
recommend that a probe or flexible hose is used so that the point where
the ambient air is being sampled is at least 1 metre away from where
anyone is breathing.
Make sure you do not exceed the operating specifications. In particular:
•
Do not exceed the probe's maximum temperature (any plastic parts
must not contact hot flues).
•
Do not exceed the temperature operating range
•
Do not put the analyser on a hot surface
•
Do not exceed the water trap's levels
•
Do not let the particle filter become dirty and blocked
•
Ensure that the magnetic boot is free from metallic particles and any
surfaces used when attaching the analyser are appropriate.
View data and rotate the dial to see changes as you make adjustments.
first to hold or 'freeze' the readings before printing. Press
Press
to print the results.
Before starting a test sequence it is recommended to check that the
value for CO reads zero and CO
air.
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reads approximately 400ppm in fresh
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