9. Warning - Alarm Time – This parameter sets a time delay for the Low Air alarm to
activate once the Low Air alarm point have been reached. This is to stop the airflow
from dropping in and out of Low Air Alarm if the airflow is turbulent and is close to
the low air alarm point value.
10. Alarm – Warning Time – This parameter sets a time delay for the air to reset to Air
Safe once the Warning air point have been reached. This is to stop the airflow from
dropping in and out of Low Air Alarm if the airflow is turbulent and is close to the
low air alarm point value.
11. Show Air Flow – This parameter enables / disables the face velocity reading on the
display. When disabled the monitor will show ether “Air Safe” or Air Fail”.
12. Show Time Line – This parameter enables / disables the time line. When disabled
the velocity bar graph (0-200fpm) is shown at the top of the display window. When
enabled a time line showing the airflow alarm condition for the previous 60 mins will
be shown at the top of the display window.
13. Audible Alarm – This parameter enables / disables the audible alarm. When disabled
the audible alarm will not sound in any alarm condition.
14. Sensor Difference – This parameter looks at the actual change on the sensor output
between the 2 cal points to make sure that the sensor sees enough change to allow the
calibration. If the monitor does not see enough change a “Sensor diff too low – Check
sensor” message will appear. This value can be lowered and then the monitor can be
recalibrated. This parameter is useful to ensure that the hose has been connected.
15. Sensitivity – This parameter reduces the scale of the monitor so that the change in
sensor output has a lesser effect on the change in the airflow display. Reducing the
sensitivity will reduce the airflow reading at higher airflows so should only be done
in small adjustments – typically 5%.
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