Filter integrity test - a test method for cleanroom equipment and systems
With this test, also called filter leakage test or leakage test, the leak-tightness of the installed filter is checked by testing it with a reference aerosol (e.g. DEHS, Emery). The filter test in the installed state is carried out in the cleanroom using the same methods (aerosol generation, dilution and measurement) and basic principles as during filter production.
A reference aerosol (ATM 228) is applied in a sufficiently high concentration on the filter upstream side. The aerosol concentration is measured using a particle counter (CPA 341). First, a defined reduction in concentration is necessary using a dilution system (DIL 554/DIL 544 - soon available) to the working range of the particle counter. On the downstream side, the filter surface is systematically scanned for possible defects using a sampling probe (SYS 529) and a particle counter.
The measurement technology set for the acceptance of cleanroom systems with the components ATM 228 aerosol generator, DIL 554 dilution system, CPA 341 particle counter (soon available), SYS 529 sampling probe, and the CRQWin cleanroom qualification software is ideally suited for the filter integrity test. With the new Cleanroom Particle Analyzer CPA 341 (cooperation product), the cleanroom set is now state-of-the-art. We recommend this lightweight yet robust measuring device to anyone who values ease of use and intuitive operation in their daily work.
CFG 291
Condensation Fog Generator CFG 291 for fog generation to visualise air flows according to ISO 14644-3
ATM 226
ATM 226 Atomizer Aerosol Generator for aerosol generation from liquids for mobile use (e.g. cleanroom acceptance measurement), integrated compressor
ATM 228
Atomizer Aerosol Generator ATM 228 for aerosol generation from liquids for mobile use, integrated compressor, pneumitic-controlled, remote controllable
DIL 554
DIL 554 Dilution System for static dilution (1:100) of aerosols at static air flow rate (28,3 L/min) for mobile operation
DIL 554/H
DIL 554/H Dilution System for static dilution (1:100) of aerosols at static air flow rate (56,6 L/min) for mobile operation
DIL 554/T
DIL 554/T Dilution System for static dilution (1:100) of aerosols at static air flow rate (28,3 L/min) for mobile operation, 1/4'' hose connector
DIL 554/Z
DIL 554/Z Dilution System for static dilution (1:10) of aerosols at static air flow rate (28,3 L/min) for mobile operation
LAP 340
Optical Particle Counter LAP 340 for analysis of particle size distributions and particle concentrations in aerosols, best for cleanroom applications
SYS 529
Rectangular Sampling Probe SYS 529 for leakage and integrity testing according ISO 14644-3 for a sample flow rate of 28,3 l/min
TopFog Light
Fog fluid TopFog Light for operation of the Condensation Fog Generator CFG 291
