Mask Bacteria Filtration Efficiency Tester HZ-9514

Mask Bacteria Filtration Efficiency Tester HZ-9514 (BFE) uses a dual gas path simultaneous sampling method to improve the accuracy of sampling. It is suitable for performance testing of mask bacterial filtration efficiency in metrological verification departments, scientific research institutes, mask manufacturers and other related departments.

I. equipment overview:
Mask Bacteria Filtration Efficiency Tester HZ-9514 (BFE) not only conforms to the requirements of medical surgical masks technology YY0469-2004 appendix B in the test method for filter efficiency (BFE) bacteria first b. 1.1.1 test instrument, but also conforms to the American society for testing material ASTMF2100, ASTMF2101, the requirements of the European EN14683 standards, innovative improvements were made on the basis of this, with double pneumatic contrast sampling method at the same time, improve the precision of sampling,It is suitable for measuring and testing departments, scientific research institutes, mask manufacturers and other relevant departments to test the performance of mask bacterial filtration efficiency.

2.Execution standard:
Q/0212 ZRB003-2011 Medical surgical mask bacterial filtration efficiency tester (BFE)

3. Technical characteristics
（1）1 Negative pressure experiment system to ensure the safety of operators;
（2）Built-in peristaltic pump in negative pressure cabinet, A and B two-stage six-stage Andersen;
（3） Flow rate of peristaltic pump can be set;
（4） Dedicated microbial aerosol generator can be set at night.
（5） atomization effect is good;
（6）Embedded high-speed industrial microcomputer control;
（7） 10.4-inch industrial-grade high-brightness color touch display;
（8） USB interface, support U disk data transfer;
（9） Cabinet with built-in high-brightness lighting;
（10） Built-in leakage protection switch to protect operator safety;
（11）The inner layer of the stainless steel is integrally processed and formed, and the outer layer is spray-coated with cold-rolled sheet.
（12） Insulation and flame retardant between inner and outer layers;
（13） front switch glass door, convenient for experimenters to observe and operate;
（14）detachable bracket, height of bracket can be adjusted;
（15） Support and move dual-purpose casters.

4.Technical index

The main parameters	Parameter range	resolution	Maximum allowable error
A sample flow	28.3L/min	0.1L/min	Better than±2.5%
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%
Front pressure of channel A	(-20～0)kPa	0.01kPa	Better than±2.5%
Front pressure of channel B	(-20～0)kPa	0.01kPa	Better than±2.5%
Pressure before spray flowmeter	(0～300)kPa	0.1kPa	Better than±2.5%
Aerosol chamber negative pressure	(-90～-120)Pa	0.1Pa	Better than±2.0%
Operating temperature	(0～50)°C
Cabinet negative pressure	(-50～-200)Pa
Data storage capacity	＞100000 group
HEPA filter characteristics	Filtration efficiency for particles above 0.3um ≥99.99%
Aerosol generator mass median diameter	Average particle diameter (3.0 ± 0.3) μm, geometric standard deviation ≤1.5
Dual 6-stage Anderson sampler captures particle size	I grade＞7μm, II grade(4.7～7)μm, III grade(3.3～4.7)μm, IV grade(2.1～3.3)μm, V grade(1.1～2.1)μm, VI grade(0.6～1.1)μm
Aerosol chamber specifications	(Length 600 x diameter 85 x thickness 3) mm
Total number of positive QC sampler particles	(2200±500)cfu
Negative pressure cabinet ventilation flow	≥5m3/min