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Carry out the odour test by gently opening the
flow control valve and smelling the air exhausted
from the sintered outlet, then close the valve. If
there is a serious odour problem, fail the sample
at this point of the test.
Initiating flows of
seriously contaminated air through the tube ports
could result in damage to the unit. If the odour
test is satisfactory, press the 'pass' icon.
The instrument will now commence a 5-minute
purge sequence, during which time an airflow will
be passed through the test port and across the
electronic cells. This clears contaminants from
previous tests and ensures that a representative
sample is being tested.
Once the purge has finished, the Draeger
tube/Impactor should be inserted into the
corresponding test port and tightened firmly;
ensure the Impactor has an intact protective seal.
This seal must remain in place for the duration of
the test. Press the button in top right hand corner
to start the test.
The test will now commence and the duration will
be displayed as a countdown, together with
pressure, ambient temperature, carbon dioxide,
carbon monoxide and oxygen content.
The unit can be left until the test time has
elapsed.
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