146443pdf — Iso

⚠️ The 2015 revision removed the "95% UCL" calculation. You now sample at multiple locations equally.

ISO 14644-1:2019 PDF can be obtained from the International Organization for Standardization (ISO) or from authorized distributors. The document is available in electronic format (PDF) and can be purchased online. iso 146443pdf

: Measuring air velocity, volume, and uniformity for both unidirectional and non-unidirectional flow. ⚠️ The 2015 revision removed the "95% UCL" calculation

: Specific procedures for: Airborne Particle Count (Classification). Airflow Velocity and Volume. Pressure Difference. Installed Filter Leakage (HEPA filter validation). Flow Visualization. iso 146443pdf

This test measures the velocity of airflow within the cleanroom to ensure it meets design requirements for maintaining a controlled environment.