Polymerase Chain Reaction Cabinets
1.3 Unit Re-Certification
1.3.1 SCR-A
1.3.1.1
Airflow Velocity and Uniformity Test
Set up a calibrated airflow meter within the interior of the cabinet to measure filter airflow at a distance of 15
cm from the filter face. Set the measurement point at the center of the filter face area.
Approx 2 ft
150 mm (6 in)
Plane is 150 mm (6 inches) in front of the filter face
Filter Face Velocity: m/s (fpm)
Results: Pass / Fail
Acceptance Criteria: Filter face velocity must be more than 0.275 m/s or 54 fpm.
Actual motor voltage for nominal airflow:
Testing was performed in accordance with the following IEST (Institute of Environmental Sciences and
Technology) contamination control document: IEST-RP-CC002.3 “Recommended Practice for Unidirectional
Flow Clean Air Devices” Section 6.1
Note: From factory, both True RMS and Averaging motor voltage are given. If your
voltmeter has “True RMS” written on it, use the True RMS voltage given here, for new
cabinet installation. If “True RMS” is not written there, it’s an averaging meter, so use
the Averaging Voltage
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