The standard evaluates dust based on two primary criteria: and particle size . 1. Dust Quantity Ratings
To determine the dust level, assessors use various methods, including: iso 8502-3 dust level chart
: Significant dust covering large portions of the tape. Rating 5 : Dense dust covering the entire tape. 2. Dust Size Classes Particle size is also classified from 0 to 5 . Description Size Range 0 Particles not visible under 10x magnification 1 Particles visible under 10x magnification 2 Particles visible with normal vision 0.1 mm to < 0.5 mm 3 Small particles 0.5 mm to < 1.0 mm 4 Medium particles 1.0 mm to 2.5 mm 5 Large particles Practical Application & Reporting The standard evaluates dust based on two primary
The ISO 8502-3 dust level chart categorizes surfaces into different cleanliness levels based on the amount and size of dust particles present. The chart consists of six cleanliness classes, ranging from "1" (very clean) to "6" (very dirty). Rating 5 : Dense dust covering the entire tape
: Inspectors record the date, location, quantity rating, and size class in a daily report to provide a permanent record of surface cleanliness.
: A strip of pressure-sensitive tape is pressed onto the prepared steel surface with consistent pressure.