標準號：BS ISO 21501-4-2007
中文標準名稱：粒度分布測定.單粒子光干擾法.無菌空間光散射塵埃粒子計數器
英文標準名稱：Determination of particle size distribution. Single particle light interaction methods. Light scattering airborne particle counter for clean spaces
標準類型：N33
發(fā)布日期：2007/8/31 12:00:00
實施日期：2007/8/31 12:00:00
中國標準分類號：N33
國際標準分類號：19.120
適用范圍：ISO 21501-4:2007 describes a calibration and verification method for a light scattering airborne particle counter (LSAPC), which is used to measure the size and particle number concentration of particles suspended in air. The light scattering method described in ISO 21501-4:2007 is based on single particle measurements. The typical size range of particles measured by this method is between 0,1 μm and 10 μm in particle size.Instruments that conform to ISO 21501-4:2007 are used for the classification of air cleanliness in cleanrooms and associated controlled environments in accordance with ISO 14644-1, as well as the measurement of number and size distribution of particles in various environments.The following are within the scope of ISO 21501-4:2007:size calibration;verification of size setting;counting efficiency;size resolution;false count rate;maximum particle number concentration;sampling flow rate;sampling time;sampling volume;calibration interval;test report.