BEFORE STARTING AIRFLOW CALIBRATION PROCEDURE, LET THE CABINET RUN FOR AT LEAST 10 MINUTES.
7.5.1) Downflow Calibration
Step 1: Place a velometer in the cabinet workzone on the horizontal plane 4 inches (102mm) above the bottom edge of the viewing window. Spot check several points on the recommended downflow velocity test grid found in table 7.0.
Step 2: If necessary, adjust airflow calibration potentiometer, located under the removable cap plug on front panel, to achieve the above stated airflow requirements.
Step 3: Proceed to inflow calibration.