Clean overalls performance testing

Purification performance testing
For clean room use clean uniforms lining attached inside and outside contamination particles was measured using the following four methods: ASTM's F-51 method (microscopy), F-51 repair permit France (counting method), HELMKE drum Act (drum method, corresponding to ASTM test method) and a vibration test (vibration method).
(1) ASTM-F-51 method (microscopy)
Test probe fitted with a filter membrane, metering pump directly connected to the suction, the amount of air passing through 28L/min. Testing the test material through the air, the dust contained in the air to the test particles captured on the filter, with 400 times magnification and count number of dust particles was observed.
0.5-5 read out at the membrane and the number of particles of 5 or more. In the membrane emblazoned with 3.08mm grid, you can read out the number of particles within a grid.
(2) ASTM-F-51 Amendment Act (counting)
The air through the test material,low temperature lcds with a dust particle counter particle size was measured and the number.
The specimen shall be placed on the bench with metal mesh, with the sampler (with a 47mm filter holder instead of) contacts to attract, the amount of air passing through 28L/min.
(3) drum method (Helmke Drum Test)
The sample is placed in a side opening of the rotating drum rotates within the barrel from a grain dust particles on the hair samples was measured with a particle counter determines the number of particles after the level of cleanliness. Rotary drum size is 43cm × 33cm, inside the barrel has four blades, the number of revolutions of drum 10 revolutions / min.
(4) Vibration Method
The specimen shall be placed in a small room, through the vibration generated torsion particles was measured with a particle counter. Meanwhile, the size of large particles (25 or more) trapped on the filter, the readout number of particles. Air flow of 3.5 ft / min (0.099m/mim), the vibration frequency of 150 times / min.
China is currently in a clean dust-free performance testing overalls national standards yet, you can refer to the Japanese air cleaner special committee to study the association of Japanese Industrial Standard JIS-B-9923, and the United States IES Standard RP-CC-003-87-T.
For dust-free performance evaluation, COG LCD Module the industry may be required in accordance with international standards ISO/TC209 clean plant standards, combined with their level of cleanliness to distinguish use.