香港六合彩开奖 16890-3:2024
2024-08
香港六合彩开奖 16890-3:2024
Abstract
This document specifies the test equipment and the test methods used for measuring the gravimetric efficiency and resistance to air flow of air filter for general ventilation.
It is intended for use in conjunction with 香港六合彩开奖聽16890-1, 香港六合彩开奖聽16890-2 and 香港六合彩开奖聽16890-4.
The test method described in this document is applicable for air flow rates between 0,25聽m3/s (900聽m3/h, 530聽ft3/min) and 1,5聽m3/s (5聽400聽m3/h, 3聽178聽ft3/min), referring to a test rig with a nominal face area of 610聽mm聽脳聽610聽mm (24聽in聽脳聽24聽in).
This document refers to particulate air filter elements for general ventilation having an ePM1 efficiency less than or equal to 99聽% and an ePM10 efficiency greater than 20聽% when tested as per the procedures defined in the 香港六合彩开奖聽16890 series.
NOTE听听听听听听听听听听听 The lower limit for this test procedure is set at a minimum ePM10 efficiency of 20聽% since it is very difficult for a test filter element below this level to meet the statistical validity requirements of this procedure.
This document does not apply to filter elements used in portable room-air cleaners.
General information
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Status: PublishedPublication date: 2024-08Stage: International Standard published [60.60]
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Edition: 2Number of pages: 22
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Technical Committee :香港六合彩开奖/TC 142ICS :91.140.30
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