Particulate matter test chamber clean air volume test range
--Excerpts from Dongguan Huanyi Instrument Technology Co., Ltd.
1. Clean air volume test range of particulate matter test chamber:
1. Applicable to the specified test chamber volume, initial concentration, detection instrument accuracy, test time and other conditions.
(1) 81 m3 test chamber, test method for particulate clean air volume with a nominal range of not less than 800 m3/h and not greater than 2000 m3/h;
(2) Test method for clean air volume of particulate matter in a 30 m3 test chamber with a scale range of not less than 30 m3/h and not greater than 800 m3/h;
(3) Test method for clean air volume of particulate matter pollutants in a 3 m3 test chamber with a nominal range of not less than 10 m3/h and less than 30 m3/h.
2. Particulate matter pollutants
Cigarette smoke is used as the dust source of particulate matter pollutants, expressed as the total number of particles above 0.3 μm. The generation of particulate matter can adopt the generation principle shown in Figure A.1 or other generation methods with equivalent effects. Figure A.1 shows the positive pressure particle generation device.
Illustrate:
1——Cigarette lighter;
2——Oil-water separator;
3——Particle filter;
4——Pressure reducing valve;
5 - cigarettes;
6——Cigarette holder;
7——Air introduction pipe;
8——Smoke introduction pipe;
9 - Air flow meter.
Note: The air supply from the cigarette lighter should be introduced directly from the test chamber to prevent continuous air supply into the test chamber, resulting in excessive pressure difference.
