A. Scope of Application:
Itis used for the performance test of the bacteria filtration efficiency of facemasks by metrological verification departments, scientific research institutes,face mask manufacturers, etc.
B. Applicable Standards:
GB/T32610-2016: Technical specification of daily protective mask
YY0469-2011:Surgical mask
C. Equipment Features:
1. Negativepressure experiment system to ensure the safety of operators.
2. Thenegative pressure cabinet has a built-in peristaltic pump, and AB two-way SixStage Microbial Andersen Cascade Impactor.
3. Theflow rate of the peristaltic pump can be set.
4. Thespray flow of the bacterial liquid of the dedicated microbial aerosol generatorcan be set.
5. Goodatomization effect.
6. Embeddedhigh-speed industrial microcomputer control.
7. 10.4-inchindustrial-grade high-brightness color touch screen.
8. USBinterface, support thumb drive data transfer.
9. Built-inhigh-brightness lighting lamp.
10. AFront-opening glass door is convenient for experimenters to observe andoperate.
11. AC220/50HZ
D. Technical Parameters
Main Parameters Range Accuracy Maximum Tolerable Deviation Channel A Sample Flow 28.3L/min 0.1L/min Better than ±2.5% Channel B Sample Flow 28.3L/min 0.1L/min Better than ±2.5% Spray Flow (8～10)L/min 0.1L/min Better than ±5.0% Peristaltic Pump Flow (0.006～3.0)mL/min 0.001ml/min Better than ±2.5% Aerosol Chamber Negative Pressure (-90～-120)Pa 0.1Pa Better than ±2.0% Temperature (0～50)℃ Data Storage Capacity >100000 sets High-Efficiency Air Filter Filtration efficiency ≥99.99% for particles over 0.3um Aerosol Generator Average particle diameter (3.0±0.3)μm, the geometric standard deviation ≤1.5 Particle Size Captured by two-way 6 Stage Microbial Andersen Cascade Impactor Level I＞7μm, Level II (4.7~7)μm, Level III (3.3~4.7)μm, Level IV (2.1~3.3)μm, Level V (1.1~2.1)μm, Level VI (0.6~1.1)μm Aerosol Chamber Dimensions (Length 600 × diameter 85 × thickness 3) mm Total particles before filtration (2200±500)cfu Cabinet Dimensions (L 1200× W 700× H 500)mm Overall Dimensions (L 1600× W 600× H 1950+250)mm Power Supply AC220V±10%，50Hz Noise <65dB(A) Weight About 150kg Power Dissipation <1500W
