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You can now measure the area of your grille and duct and enter
it into the DAF3009. The meter can accept any area from
2
2
2
0.1 ft
to 99.9 ft
. Users of metric units must convert their cm
2
measurements to ft
before entering them.
To begin, press the AREA button. This will cause the left (most
significant) digit on the lower readout to begin flashing. Press the
SET button as many times as necessary until the left digit matches
the left digit of your grille or duct area. Then press the AREA button
to save that digit. This will cause the second digit from the left to
begin flashing. Again, press the SET button as many times as
necessary until the second digit from the left on the display
matches the second digit from the left of your grille or duct area.
Press the AREA button to save that digit. Repeat the process for
the right (least significant) digit. To return to any digit to change its
value, press the AREA button once, twice or three times.
To measure the volume of air exiting a grille or duct, remove
the vane and sensor protection cap and enter airflow volume
mode (with FLOW appearing on the top line of the LCD). Turn the
vane at the top of the unit perpendicular to the source of air or
wind. It makes no difference whether the front of back of the vane
faces the flow. Allow a few seconds for the reading to stabilize.
For airflow volumes less than 9999 CFM or CMM, the value on the
upper readout represents a true measurement. For airflow
volumes between 10,000 and 99,999 CFM or CMM, the indication
X10 below and to the left of the upper readout is a reminder to
multiply the value shown by 10 for a true measurement. For
airflow volumes above 99,999 CFM, the indication X100 is a
reminder to multiply the value shown by 100 for a true
measurement.
DISPLAYING MIN/MAX/AVG AIR SPEEDS
AND AIRFLOW VOLUMES
The DAF3009 keeps track of the maximum and minimum (fastest
1
and slowest) and average air speed and airflow volume values
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