List of Clean Room Testing Items

Insights by Deiiang™ and product designer Deiiang Jason.peng

Cleanrooms are critical environments designed to maintain low levels of particulates and surface contamination. To achieve their full potential, regular monitoring and adherence to strict standards are necessary. This article outlines key practices in monitoring cleanroom parameters, ensuring compliance with regulations and optimal performance.

Airborne Particle Counting

Airborne particle counting is fundamental for CleanRoom Validation. Particle counters measure the concentration of airborne particles, confirming compliance with ISO 14644 standards. Regular checks ensure facilities maintain necessary cleanliness levels, critical for preventing contamination in pharmaceuticals, biotechnology, and Semiconductor manufacturing.

Differential Pressure Gauges

Maintaining correct pressure differentials between cleanroom zones prevents contamination ingress. Gauges monitor pressure levels to align with design specifications, securing directional airflow and reducing risk of contaminants entering cleaner zones. Regular calibration ensures operation within parameters.

Temperature and Humidity Sensors

Regulating temperature and humidity is critical for sensitive processes. Sensors continuously monitor these parameters to maintain stability, reducing static discharge, preventing material degradation, and ensuring safety.

Parameter	Optimal Range	Key Benefits
Temperature	20-22°C	Reduces static discharge; stabilizes processes
Humidity	30-60%	Prevents material degradation; ensures safety

Airflow Patterns

Airflow assessment maintains cleanroom efficiency. Proper direction and velocity (especially in laminar flow hoods) ensure effective particle sweeping, containing contaminants away from critical processing areas.

Illumination and Noise Testing

Illumination Testing

Adequate lighting supports detailed visual tasks (inspection, assembly). Proper levels reduce errors, enhancing safety and efficiency.

Noise Testing

Controlling noise protects workers from auditory harm and minimizes distractions, supporting concentration in precision processes.

Floor Conductivity Testing

Crucial for Electronics cleanrooms to prevent static build-up. Tests evaluate flooring materials' ability to dissipate static charges, protecting equipment and products from electrostatic discharge (ESD). Regular testing ensures long-term conductivity.

Filter Performance

Evaluating HEPA/ULPA filters ensures effective particle capture. Testing includes measuring airflow and particle efficacy, conducted by qualified professionals.

Ensures peak efficiency of air filtration systems
Prevents particle build-up that compromises environment
Regular checks maintain consistent air quality

Microbial Monitoring

Detects and quantifies microbial contamination, ensuring product safety. Methods include:

Air sampling for airborne microbes
Surface swabbing to check for surface contamination
Settle plates for comprehensive microbial assessment

Pre-Testing Preparation

HVAC System Operation for 48 Hours

HVAC systems run continuously for ≥48 hours to stabilize the environment, ensuring accurate reflection of air quality and system performance.

Indoor Pressure Testing

Pressure gauges measure differentials between cleanroom and adjacent areas, ensuring alignment with design specs to prevent contamination ingress.

Filter Leakage Testing

HEPA/ULPA Filter Testing

Regular checks ensure filters remain intact and maintain particle capture efficiency.

Test Equipment

Aerosol generators and photometers introduce and measure particle concentrations across filter surfaces.

Testing Steps

Introduce challenge aerosol upstream of the filter
Measure particle penetration downstream
Conduct thorough inspections using scan methods
Seal detected breaches promptly to restore functionality

Conclusion: Ensuring Cleanroom Excellence

Through rigorous monitoring of parameters, facilities maintain exceptional clean environments, ensuring compliance and operational success. Deiiang™, with Jason.peng's expertise, provides innovative solutions for precise cleanroom management.