Labconco TXE Tall XPerEnclosure 3892022 - Manual (Page 16)

Chapter 3: Getting Started
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Set the Face Velocity with the Speed Control
Adjustment
The adjustment of the speed control gives the correct face velocity and is located
behind the front panel. The face velocity should be adjusted between 80 and 100
fpm. (Consult your Safety Officer for airflow recommendations for your
application). Containment is maximized at a setting within this range. Working at
the lowest face velocity appropriate for the application will give the quietest
operation. Face velocity measurements are made using an anemometer. An
electric anemometer can be obtained from your laboratory supply dealer. Face
velocity measurement should be taken as an average of several readings in the
largest of openings with the glass doors closed. Using a small Phillips
screwdriver, adjust the speed control to give the required face velocity. See
Figures 6-1 and 6-2 in Chapter 6 to locate the speed control. The face velocity is
increased by turning the speed control counter clockwise and clockwise to
decrease face velocity.
NOTE: Face velocity profiles and smoke testing should be
performed frequently per your organization’s quality system to
ensure safe performance.
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