1. According to the cleanliness of the environmental workshop, the primary filter and the medium efficiency filter are periodically removed and cleaned; the cleaning time is usually 2-3 months; the simple and direct method is visual inspection; the dust particles on the non-woven filter material are not More; there is no blackening on the surface. If it can be removed, wash or replace the sterilization. Always use the gauze with alcohol to wipe the surface of the ultraviolet germicidal lamp to keep the surface clean, otherwise it will affect the sterilization ability of the sample car.
2. After sampling the sampling vehicle , first use the brush to clean the debris and dust in the clean working area. Wipe the surface stains and dirt with a soft cloth on the surface of the work area. Visually clean the residue without cleaning. Wipe dry with a cleaning cloth to reach The inner and outer surfaces are bright and tidy, with no smud.
3. After each use, clean the instrument immediately, and hang the corresponding mark, and fill in the instrument usage record in time.
4. The cleanliness of the work area should be measured regularly by the dust particle counter every three months. The average number of colonies of the clean sample car should be determined by the plate method. When the technical parameters are not met, the cause must be found and repaired in time.
5. If the sampling vehicle increases the input voltage of the fan and can not make the average wind speed of the purification working area reach 0.32m/s~0.48m/s, it indicates that the dust holding capacity of the air high efficiency filter has become saturated and must be replaced.
6. If the HEPA filter must be opened after opening the top cover of the clean sample car , remember to place the arrow mark at the direction of airflow (ie down) when installing the HEPA filter .
7. After replacing the high-efficiency filter, it is necessary to use the dust particle counter again to check whether the seal of the surrounding frame is good. If necessary, the silicone can be used for plugging. Then adjust the fan input voltage to keep the average wind speed in the purification working area within the range of 0.32m/s to 0.48m/s.
8. Perform maintenance inspections once a month and fill in the instrument maintenance records.
Shanghai Sujing Industrial Co., Ltd.
　　
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SUJING—JINGHUA
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