Downflow Velocity Profile Test - Labconco Logic Vue User Manual

Downflow Velocity Profile Test

The downflow velocity profile shall establish laminar downflow and the average
downflow velocity.
The following tools are required:
• Tape Measure
• Felt-tipped Marker
• Thermal Anemometer and stand (stand height must place probe 12 inches or
30.5 cm above the work surface)
• Calculator (to calculate the average of the downflow data points)
Establish the downflow velocity test points on the work surface as shown in Figure 4-24.
Dimensions shown are in inches. It is recommended to number each point for
reference.
The test points are geometrically centered on the work surface. For reference, the front,
right most test point will be located 8.7 inches (221 mm) in from the front edge, and 7.0
inches (178 mm) from the right inner side wall. The distance between all rows and
columns of test points shall be 6.0 inches (152 mm).
Place the thermal anemometer in its stand. Verify the probe's directional mark is
directed correctly. Most anemometer tips have a small circle, which should be facing
the oncoming airflow (facing up in this test).
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Figure 4-24