Classification of clean rooms / cle

Classification of clean rooms / clean air devices should be done
according to provisions in EN ISO 14644-1. Compared with the prior version, the
values for maximum permitted particles have been changed in this section.
Especially the values for the maximum permitted number of 5 Dm particles / m3 for
grade A have been changed from 1 to 20. For grade A, the corresponding ISO class
is 4.8, based on the 5 Dm counts.

ผลลัพธ์ (อังกฤษ) 2:

Classification of Clean Rooms / Clean Air Devices should be done
according to EN ISO Provisions in from 14644 to 1. Compared with the prior Version, the
values ​​for maximum Permitted particles have been changed in this section.
Especially the values ​​for the maximum Permitted Number of 5 Dm particles / m3 for
grade A have been changed from 1 to 20. For grade A, the corresponding. ISO Class
is 4.8, based on the 5 Dm counts.