84
Work Area Air Cleanliness Test (optional)
Air cleanliness is a measurement of all particles (greater than or equal to 0.5 micron in
size) in the air. This is not an NSF Standard 49 test. However, if the end user would
like to verify air cleanliness in the work area, follow these instructions:
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 at a height of 16 inches (41 cm) above the work
surface, pointing up into the airflow. Place the particle counter pickup at each of
the three marked test points, and take one sample at each test point of 1.0 ft
3
of
air. See Figure 10-34 for reference.
Note: if sampling 1.0 m
3
instead of 1.0 ft
3
, see Acceptance Criteria below for
passing threshold.
3. Average the particle count results from each of the three test points.
Acceptance Criteria
The average particle count is less than 100 particles 0.5 micron and larger per cubic
foot, or less than 3,520 particles 0.5 micron and larger per cubic meter.
To Next Page
Loading...
Need help?
General
