GB/T 29024.4-2017 English PDF

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GB/T 29024.4-2017: Determination of particle size distribution -- Single particle light interaction methods -- Part 4: Light scattering airborne particle counter for clean spaces
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 29024.4-2017	359	Add to Cart	3 days	Determination of particle size distribution -- Single particle light interaction methods -- Part 4: Light scattering airborne particle counter for clean spaces	Valid

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Basic data

Standard ID: GB/T 29024.4-2017 (GB/T29024.4-2017)
Description (Translated English): Determination of particle size distribution -- Single particle light interaction methods -- Part 4: Light scattering airborne particle counter for clean spaces
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A28
Classification of International Standard: 19.120
Word Count Estimation: 18,134
Date of Issue: 2017-09-29
Date of Implementation: 2018-04-01
Adopted Standard: ISO 21501-4-2007, IDT
Regulation (derived from): National Standard Notice 2017 No. 23
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the clean room light scattering particle counter (abbreviated as LSAPC, hereinafter referred to as the counter) calibration and verification methods used to measure the size of the particles suspended in the air and the concentration of the concentration. The light scattering method in this section is based on single particle measurement. The typical particle size measurement of this method is in the range of 0.1 ��m to 10 ��m. The instruments conforming to this standard are mainly used for the classification of air cleanliness in clean rooms and controlled clean areas, see reference [2], but also for the measurement of particle number and particle size distribution in other ambient air. This section contains the following - Particle size calibration; - particle size set value verification; - Counting efficiency; - Particle size resolution; - Fake count rate; - The maximum particle concentration; - Sampling flow;

GB/T 29024.4-2017: Determination of particle size distribution -- Single particle light interaction methods -- Part 4: Light scattering airborne particle counter for clean spaces

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of particle size distribution - Single particle light interaction methods - Part 4. Light scattering airborne particle counter for clean spaces ICS 19.120 A28 National Standards of People's Republic of China Particle size analysis of single particle optical measurement method Part 4. Clean room light scattering dust particle counter Part 4.Lightscatteringairborneparticlecounterforcleanspaces (ISO 21501-4.2007, IDT) 2017-09-29 Posted 2018-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Preface Ⅰ Introduction Ⅱ 1 Scope 1 2 Terms and definitions 1 3 Requirements 2 4 test method 3 Appendix A (Informative) Particle size calibration uncertainty assessment 8 Appendix B (informative) counting efficiency 10 Appendix C (informative) Particle size resolution 11 Appendix D (informative) False count rate 12 Appendix E (Informative) Responsiveness 13 References 14

Foreword

GB/T 29024 "Particle size analysis of single optical measurement method" is divided into four parts. --- Part 1. Light scattering aerosol spectrometer; --- Part 2. Liquid particle counter light scattering method; --- Part 3. Liquid particle counter photolithography; --- Part 4. Clean room light scattering dust particle counter. This section GB/T 29024 Part 4. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method is equivalent to using ISO 21501-4.2007 "Particle size analysis of optical measurement methods Part 4. Jie Net interspersed light scattering particle counter ". This section made the following editorial changes. --- In keeping with the provisions of Chapter 3, replace "sampling volume" in the first column with "response capacity". This part of the national particle characterization and sorting and screen standardization Technical Committee (SAC/TC168) proposed and centralized. This part of the drafting unit. China Institute of Metrology, Machine Productivity Promotion Center, Beijing Coast Hong Meng Standard Material Technology Co., Ltd. Secretary, Suzhou Su net equipment controlled Equipment Co., Ltd., Beijing Kyushu Peng Yue Technology Co., Ltd., Beijing Physical and Chemical Analysis Center, Beijing powder Technology Association, Beijing Ruiman Bo (Beijing) Environmental Technology Co., Ltd. The main drafters of this section. Liu Junjie, Zhou Suhong, Yu Fang, Hou Changge, Zhang Wenge, Chen Jian, plateau, Zhang Tao, Li Li, Yang Zibin.

Introduction

In the electronics industry, the pharmaceutical industry, precision instruments manufacturing and medical clinics, and many other areas need to monitor particle pollution, and dust particle meter The counter is an effective instrument for monitoring particulate contamination in the air. This section provides a calibration procedure and test for light-scattering dust particle counters Card method to minimize errors in instrument measurements and differences in measurement results between different instruments. Particle size analysis of single particle optical measurement method Part 4. Clean room light scattering dust particle counter

1 Scope

GB/T 29024 provisions of this part of the clean room light scattering particle counter dust (abbreviated as LSAPC, hereinafter referred to as the count ) Calibration and verification methods, the instrument used to measure the size of particles suspended in the air and the number of concentrations. Light scattering method in this section For single particle measurement, the typical particle size measurement of this method is in the range of 0.1 μm to 10 μm. In line with this section of the instrument is mainly used for clean rooms and controlled cleanliness of the classification of air cleanliness, see reference [2], but also For other ambient air particles and particle size distribution measurement. This section contains the following. --- Particle size calibration; --- particle size set value verification; --- Counting efficiency; --- Particle size resolution; --- Fake count rate; --- maximum particle concentration; --- Sampling flow; --- sampling time --- Responsiveness; --- Calibration cycle; ---testing report.

2 Terms and definitions

The following terms and definitions apply to this document. 2.1 Calibrate Particles calibrationparticles Monodisperse spherical particles with a known average particle size. The average particle size can be traceable to the international standard length, and the standard uncertainty should be Not more than 2.5% (such as polystyrene latex particles PSL). Note The refractive index of the PSL calibration particles is approximately 1.59 at 589 nm (line D in the sodium spectrum) wavelength. 2.2 Counting efficiency countingefficiency When measuring the same sample, the ratio of the calibrated counter to the standard instrument measurement. 2.3 Particle counter particlecounter Using light scattering or extinction method (light resistance method) for particle counting and particle size measurement of the instrument. ......

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