1Prepare nitrogen cylinders on the outside of the tested facility before use,You should add e-liquid in advance(Or the container inside the machine has been pre storedPAOaerosol)And before the performance starts, it is necessary to turn on the power to preheat the smoke generator. The length of preheating time should be standardized10More than minutes; The spray should not be started if the preheating time is insufficient.And connect the aerosol generator (thermal generator) to the upstream suction port of the tested high-efficiency filter.Ensure that the pressure of nitrogen input into the aerosol generator (thermal generator) remains greater than4 kg/cm3The state of heating aerosol（PAO）Go to385～400℃ and reach stabilityTurn on the fan normally to allow the aerosol mixed with the supply air to enter the upstream of the high-efficiency filter in the tested facility and stabilize for a period of time. Ensure aerosol（PAO）Uniformly distributed upstream of the high-efficiency filter.

2Open the aerosol（PAO）Spectrophotometer until stable aerosol is obtained（PAO）Establish upstream concentration values100%Upstream concentration benchmark; Aerosol（PAO）The upstream concentration is not less than20 Mg/L.

3Using aerosols（PAO）The photometer tests the leakage concentration downstream of the high-efficiency filter in the tested facility. The test points are distributed on all sections of the high-efficiency filter and the connection of the sealing material in the tested facility, scanning the entire filter surface, between the filter and the frame, between the frames, and between the frame and the static pressure box at the sealing points. The distance between the sampling head and the filter surface during scanning is about1Inches (approximately)2.54 cm）The scanning speed should not exceed5 cm/sScan back and forth in a straight line with overlapping lines. Read test data.

4The maximum value of the test value is taken as the final leakage concentration (%), which is the integrity test result of the high-efficiency filter.