Cut Point Test
Determine filter cut point using fluidized microspheres for precise filter efficiency testing and validation.
Test Parameters
Microsphere Data
Format: size, upstream_count (one per line)
Format: size, downstream_count (one per line)
Test Results
Cut Point (β=1000): | - |
Cut Point (β=10000): | - |
Maximum Efficiency: | - |
Steepness Factor: | - |
Filter Rating: | - |
Test Validity: | - |
Efficiency Curve
Cut Point Testing Guidelines
Beta Ratio (β)
The beta ratio is defined as the ratio of upstream to downstream particle count at a specific size:
β = Nupstream / Ndownstream
- β = 1000: 99.9% efficiency
- β = 10000: 99.99% efficiency
Test Standards
- ISO 16889 - Multi-pass method
- ASTM F795 - Pore size rating
- ASTM F838 - Bacterial retention
- ISO 4003 - Pressure drop
Key Parameters
- Particle size distribution
- Flow rate consistency
- Pressure stability