BS ISO 21501-4:2018
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Determination of particle size distribution. Single particle light interaction methods Light scattering airborne particle counter for clean spaces
Hardcopy , PDF
13-02-2023
English
25-05-2018
Important note : Users cannot be edited or removed once added to your Multi user PDF.| DocumentType |
Standard
|
| Pages |
34
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
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| Supersedes |
This document describes a calibration and verification method for a light scattering airborne particle counter (LSAPC), which is used to measure the size distribution and particle number concentration of particles suspended in air. The light scattering method described in this document is based on single particle measurements. The typical size range of particles measured by this method is between 0,1μm and 10μm in particle size.
Instruments that conform to this document are used for the classification of air cleanliness in cleanrooms and associated controlled environments in accordance with ISO14644‑1 and ISO14644‑2, as well as the measurement of number and size distribution of particles in various environments.
The following parameters are within the scope of this document:
size setting error;
counting efficiency;
size resolution;
false count;
maximum particle number concentration;
sampling flow rate error;
sampling time error;
response rate;
calibration interval;
reporting results from test and calibration.
| Standards | Relationship |
| ISO 21501-4:2018 | Identical |
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