• BS ISO 21501-4:2007

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Determination of particle size distribution. Single particle light interaction methods Light scattering airborne particle counter for clean spaces

    Available format(s):  Hardcopy, PDF

    Superseded date:  25-05-2018

    Language(s):  English

    Published date:  31-08-2007

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    Introduction
    1 Scope
    2 Terms and definitions
    3 Requirements
       3.1 Size calibration
       3.2 Verification of size setting
       3.3 Counting efficiency
       3.4 Size resolution
       3.5 False count rate
       3.6 Maximum particle number concentration
       3.7 Sampling flow rate
       3.8 Sampling time
       3.9 Response rate
       3.10 Calibration interval
       3.11 Test report
    4 Test method
       4.1 Size calibration
       4.2 Verification of size setting
       4.3 Counting efficiency
       4.4 Size resolution
       4.5 False count rate
       4.6 Maximum particle number concentration
       4.7 Sampling flow rate
       4.8 Sampling time
       4.9 Response rate
       4.10 Calibration
    Annex A (informative) Uncertainty of particle size
                          calibration
    Annex B (informative) Counting efficiency
    Annex C (informative) Size resolution
    Annex D (informative) False count rate
    Annex E (informative) Response rate
    Bibliography

    Abstract - (Show below) - (Hide below)

    Explains 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.

    General Product Information - (Show below) - (Hide below)

    Committee LBI/37
    Development Note Together with BS ISO 21501-2 and BS ISO 21501-3, supersedes BS ISO 13323-1. (08/2007) Supersedes 05/30137700 DC. (10/2007)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO 9276-1:1998 Representation of results of particle size analysis — Part 1: Graphical representation
    ASTM F 328 : 1998 Standard Practice for Calibration of an Airborne Particle Counter Using Monodisperse Spherical Particles
    ASTM F 649 : 2001 Standard Practice for Secondary Calibration of Airborne Particle Counter Using Comparison Procedures (Withdrawn 2007)
    ISO 14644-1:2015 Cleanrooms and associated controlled environments Part 1: Classification of air cleanliness by particle concentration
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