8
To take a single reading, press the trigger key
momentarily. The instrument will display the
measured value.
Press and hold the trigger key to take a sweep,
or time-averaged, reading. The sweep reading
will update approximately every second.
Release the trigger key to stop the sweep
measurement and display the average value.
Measuring Air Volume
The operation for air volume measuring is the
same as air velocity. For volume flow rate
mode, determine the cross-sectional area of the
duct or grille for which the volume flow rate is
required. If working in Metric units,
calculations must be in m
2
. If working in
Imperial units, calculations must be in ft
2
.
Switch the instrument to “Area +” mode and
observe the area figure displayed from the
memory. If the new area required is larger than
the one displayed press the trigger to increase
the displayed area to the calculated figure. If the
area is less than the figure displayed push the
Mode Button to change to “Area -” mode and
press the trigger to reduce the displayed area to
the calculated figure. When the correct area has
been displayed use the Mode key to select the
required “Vol” mode.
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