erlab Captair Flex S Series - Monitoring Air Face Velocity

User Manual
TM
36
The anemometer provided with your Captair® Flex™ fume hood allows the user to
constantly monitor the face velocity.
If the anemometer is not installed during assembly, please install this device according to
the steps listed in the installation instructions provided with your fume hood.
When reading the face velocity, first be sure to check that the leveling bubble on the
anemometer is positioned correctly. To ensure proper movement of the strip, the anemo-
meter must be level. The air face velocity must be between 0.4 and 0.6 m/s (as required
by AFNOR NF X 15-211: 2009 standard).
What should you do if the strip does not move or if its movement is irregular?
First of all, verify that the fume hood’s ventilation system is turned on.
If the strip’s movement is highly irregular, verify that the strip is correctly positioned in
the housing located within the anemometer as shown in the diagrams below. The two
pins of the strip must be correctly positioned in the support slots.
2 31
Leveling bubble
Range of movement
of the air speed
indicator strip.
Monitoring air face velocity