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ISO. International org. For standardization

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bevisawu's version from 2015-05-03 14:18

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ISO class 3Contains no more than35.2 particals of 0.5 micron or llarger per cubic meter. An ISO 3 enviroment is equivalent to FS209E Class 1 ( no more than 1 partical of 0.5 micron or larger per cubic foot)
ISO Class 4contains no more than 325 particals of 0.5 micron or latger per cubic meter. An ISO 4 enviroonment is equivalent to FS209E class10 (no more tan 10 particals of 0.5 micron or laerger per cubic foot)
ISO Class 5Contains no more than 3520 particales of 0.5 microns or larger per cubic meter. An ISO 5 environment is equivalent to FS209E class 100 (no more than 100 particals of 0.5 microns or larger per cubic foot)
ISO Class 6Contains no more than 35,200 particals of 0.5 micron or larger per cubic meter. An ISO 6 environment is equivalent to FS209E class 1000 ( no more than 1000 particals of 0.5 micron or larger per cubic foot)
iSO Class 7Contains no more than 325,000 particales 0.5 micron or larger per cubic meter. An ISO 7 enviroment is equivalent to FS209E Class 10,000 (no more than 10,000 particals of 0.5 microns or larger per cubic foot)
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