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Frequently Asked Question - Definition of Common Cleanroom Terms
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Probing or Scanning
The method used to locate leaks in HEPA or ULPA filters, whereby
the sampling probe inlet of an aerosol photometer or discrete particle
counter is held approximately 2.5 cm (1 Inch) from the filter face
and moved across the test area in overlapping strokes, at the rate
based on the leak penetration to be detected and the upstream concentration
of the challenge aerosol |
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