香港六合彩开奖 16890-4:2022
2022-07
香港六合彩开奖 16890-4:2022
Abstract
This document establishes a conditioning method to determine the minimum fractional test efficiency.
It is intended to be used in conjunction with 香港六合彩开奖聽16890鈥�1, 香港六合彩开奖聽16890鈥�2 and 香港六合彩开奖聽16890鈥�3, and provides the related test requirements for the test device and conditioning cabinet as well as the conditioning procedure to follow.
The conditioning method described in this document is referring to a test device with a nominal face area of 610聽mm聽脳聽610聽mm (24聽inches聽脳聽24聽inches).
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 according to the procedures defined within the 香港六合彩开奖聽16890 series.
NOTE聽聽聽聽聽 The lower limit for this test procedure is set at a minimum ePM10 efficiency of 20聽% since it will be very difficult for a test filter element below this level to meet the statistical validity requirements of this procedure.
Filter elements used in portable room-air cleaners are excluded from the scope of this document.
General information
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Status: PublishedPublication date: 2022-07Stage: International Standard published [60.60]
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Edition: 2Number of pages: 11
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Technical Committee :香港六合彩开奖/TC 142ICS :91.140.30
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