How do I prepare for an LEV test?

First, make sure the system is clear and easy to use. Clutter around extraction points or blocked filters cause the system to operate slowly. Prepare the system logbook, including any prior test reports and maintenance logs.
To get personnel to comply during testing, let them know what is going on. To evaluate the system in authentic settings, try to arrange the test during regular business hours. The test will go more quickly, smoothly, and accurately if you prepare a little.