Manual
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4
4. Detailed Description
Press the ON\OFF key to turn the RVA801/LCA301 on and off. When the instrument is turned on, it
will start in the mode that was used last.
ON / OFF Key
Button
to select mode
4.1
English/Metric Unit Selection
RVA801/LCA301 instruments can display Metric or Imperial units. To select metric or imperial units,
press the Mode key while turning on the device. Then press the trigger to select the unit type and
press the Mode key again to save your setting.
4.2
Measuring Air Velocity
Select velocity using the MODE key if required. In order to perform a velocity measurement, hold the
rotating vane in the airstream noting the flow direction arrow on the instrument head. Keep the vane
in the airstream for about five seconds before pressing the trigger key to take a reading. This
enables the vane anemometer to reach a steady speed and the average reading will be more
accurate. 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 continuous measurement, or time-
averaged measurement. The sweep indication will update approximately every second. Release the
trigger key to stop the sweep measurement and display the average value.
4.3
Measuring Air Volume
The procedure for air volume measuring is the same as air velocity. To calculate the air volume, the
air velocity and area (duct, grille size or Air Cone data) are required. The RVA801/LCA301 air
velocity meter allows the user to feed-in the area manually into the instrument and get immediately
volume flow values. To measure air volume, determine the cross-sectional area of the duct or grille
Содержание LCA 301
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