Iso 146443pdf 2021 !!hot!! -

The 2019 revision introduced important changes that continue to influence cleanroom practices today:

A recovery time of under 20 minutes is a common industry benchmark for efficiency. 4. Airflow Visualization (Smoke Testing) iso 146443pdf 2021

The cleanroom structure is complete, the HVAC system is operational, but no production equipment or personnel are present. The 2019 revision introduced important changes that continue

| Aspect | 2005 Version | 2019 Version | |--------|--------------|----------------| | | Basic guidance | Advanced methods using laser sheet, fog generators, quantitative analysis (e.g., vector diagrams) | | Filter leakage | Discrete particle counter or photometer | Added scanning methods for HEPA/ULPA, clearer acceptance criteria | | Recovery test | Generic procedure | Improved for unidirectional & non-unidirectional airflow | | Containment leak | Limited | Expanded for isolators, glove ports, transfer systems | | Instrument requirements | General | Specific resolution, sampling rates, calibration intervals | | Aspect | 2005 Version | 2019 Version

Each test report must include:

| Aspect | ISO 14644-3:2005 (Old Version) | ISO 14644-3:2019 (New Version) | | :--- | :--- | :--- | | | Used term "optional tests" for many supporting procedures. | Renamed them "supporting tests" to emphasize their importance | | Airflow Visualization | Primarily focused on static airflow pattern testing. | Requires both static (basic pattern) and dynamic (simulating actual operations) testing | | Filter Leak Test – Upstream Concentration | Required upstream concentration of 10 mg/m³ to 100 mg/m³ for photometer testing. | Expanded to 1 mg/m³ to 100 mg/m³, acknowledging that not all photometers are suitable at the lower level | | Filter Leak Test – Acceptance Criteria | Uniform acceptance criteria of ≤0.01% for all HEPA filters. | Introduces differentiated criteria: ≤0.01% remains, but adds ≤0.1% for filters with MPPS efficiency 99.95% to 99.995% | | Filter Leak Test – Scan Speed | Scan speed not explicitly specified. | Specifies scan speed of 5 cm/s to improve detection efficiency and testing productivity | | Recovery Test | Did not specifically advise against testing in unidirectional flow rooms. | Explicitly advises against performing recovery tests in unidirectional airflow cleanrooms | | Segregation Test | Not included. | Added as a completely new test method to evaluate the effectiveness of segregation devices or barriers | | Electrostatic & Ion Generator Tests | Less detailed guidance. | Expanded and refined to support industries where electrostatic discharge (ESD) control is critical (e.g., electronics manufacturing) |