ISO 14644-1:2015 specifies the classification of air cleanliness in terms of concentration of airborne particles in cleanrooms and clean zones; and separative devices as defined in ISO 14644‑7. Only particle populations having cumulative distributions based on threshold (lower limit) particle sizes ranging from 0,1 µm to 5 µm are considered for classification purposes. The use of light scattering (discrete) airborne particle counters (LSAPC) is the basis for determination of the concentration of airborne particles, equal to and greater than the specified sizes, at designated sampling locations. ISO 14644-1:2015 does not provide for classification of particle populations that are outside the specified lower threshold particle-size range, 0,1 µm to 5 µm. Concentrations of ultrafine particles (particles smaller than 0,1 µm) will be addressed in a separate standard to specify air cleanliness by nano-scale particles. An M descriptor (see Annex C) may be used to quantify populations of macroparticles (particles larger than 5 µm). ISO 14644-1:2015 cannot be used to characterize the physical, chemical, radiological, viable or other nature of airborne particles.
ISO 14644-1:2015 specifies the classification of air cleanliness in terms of concentration of airborne particles in cleanrooms and clean zones; and separative devices as defined in ISO 14644‑7.
Only particle populations having cumulative distributions based on threshold (lower limit) particle sizes ranging from 0,1 µm to 5 µm are considered for classification purposes.
The use of light scattering (discrete) airborne particle counters (LSAPC) is the basis for determination of the concentration of airborne particles, equal to and greater than the specified sizes, at designated sampling locations.
ISO 14644-1:2015 does not provide for classification of particle populations that are outside the specified lower threshold particle-size range, 0,1 µm to 5 µm. Concentrations of ultrafine particles (particles smaller than 0,1 µm) will be addressed in a separate standard to specify air cleanliness by nano-scale particles. An M descriptor (see Annex C) may be used to quantify populations of macroparticles (particles larger than 5 µm).
ISO 14644-1:2015 cannot be used to characterize the physical, chemical, radiological, viable or other nature of airborne particles.
<div id="MathJax_Message" style="display: none;"></div> <p></p> <p>La présente partie de l'ISO 14644 comprend la classification de la propreté de l'air des salles propres et environnements maîtrisés apparentés exclusivement en termes de concentration des particules en suspension dans l'air. Pour l'application de cette classification, on ne considère que les populations de particules présentant une distribution cumulée dont le seuil inférieur de sensibilité se situe dans l'étendue granulométrique de 0,1 µm à 5 µm. La présente partie de l'ISO 14644 ne donne pas la classification des populations de particules sortant de l'étendue granulométrique de référence de 0,1 µm à 5 µm. Les concentrations de particules ultrafines (plus petites que 0,1 µm) et de macroparticules (plus grandes que 5 µm) peuvent être utilisées pour quantifier ces populations en terme de descripteurs U et M. La présente partie de l'ISO 14644 n'est pas applicable pour caractériser la nature physique, chimique, radiologique ou viable des particules en suspension dans l'air. <br /><br />NOTE La distribution granulométrique réelle de particules par taille à l'intérieur de l'étendue de référence n'est pas habituellement prévisible et est typiquement variable avec le temps.</p>
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