Labconco 3940200 User Manual - Hepa Filter Leak Test

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Chapter 6: Maintaining Your Filtered Enclosure

9.  Carefully fold and roll the new bag in four-inch pleats and 

push the bag into the access port.   Reinstall the retaining 

strap and bungee cords.  Turn the enclosure ON to draw a 

vacuum on the bag.  Reinstall the front panel. 

Figure 6-1 

Bag-In-Bag-Out HEPA Filter Changing Procedure Diagram & 

Filter Leak Test Diagram 

HEPA Filter Leak Test 

Purpose 

After installing the new HEPA filter, the HEPA filter should be 

leak checked.  This test is performed to determine the integrity of 

the HEPA filter, the filter housing, and the filter mounting frames.  

Leak testing is to be done by a qualified technician with calibrated 

equipment.  Remove the top perforated exhaust cover by using a 

Phillips screwdriver to unfasten the (2) screws used to secure (2) 

clips.  See Figure 6-1.  The filter passes the leak test at .01% or 

better.  Reference Leak Testing and Photometer scanning from the 

Institute of Environmental Services (IES-RP-CC001.3) 

 HEPA