Labconco Type C1 Biosafety Cabinet Models 30468 - Manual (Page 89)

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Work Area Air Cleanliness Test (optional)
If the customer wants to verify air cleanliness in the work area, use the following
procedure:
1. Mark test points at the geometric center of the work surface, and midway
between the center test point and each side wall.
2. Place a particle counter pickup on a test point, at a height of 16 inches above the
work surface, pointing into the airflow, as shown in Figure 5-15. Take three
samples of 1.0 ft 3 . Repeat for each test point.
3. Average the results.
Figure 5-15
Acceptance
The average count should be less than 100 particles 0.5um in size per ft
3 .