Factair F4500, Operating Manual

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17
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.
The F4500 incorporates a unique flow checking
system to ensure that the air is passing through
all 4 outlet ports, thus eliminating the possibility
of a false positive result.
If this screen appears the system has detected a
fault on one of the outlets, it is possible that this
could be due to a low battery. Replace the
batteries and repeat the test, if the screen
reappears then the unit should be returned to
Factair for investigation.
Once the purge has finished, the Water (F4500
only), CO, CO
2
and Draeger Impactor/oil tube
should be inserted into the 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, flowrate, ambient temperature and
oxygen content.
During the test the flowmeter should be closed
with no flow indicated on the display.
The unit can be left until the test time has
elapsed.