1. Slow movement principle: In order to avoid affecting the normal wind path, the hand should move as smoothly as possible when operating inside the cabinet
2. The principle of placing items in parallel: In order to avoid cross-contamination between items and items, the items placed in the cabinet should be placed horizontally and horizontally as much as possible to avoid cross-contamination during the return air process. At the same time, avoid blocking the return air grille on the back and affecting the normal air path
3. The principle of avoiding vibration: Try to avoid the use of vibrating instruments (such as centrifuges, vortex oscillators, etc.) in the cabinet, because vibration will shake off the particulate matter accumulated on the filter membrane, resulting in a decrease in the cleanliness of the operating room, and at the same time If the balance of the front operating surface fails, it will also cause the safety cabinet to contaminate the operator
4. The principle of moving in different sample cabinets: When two or more items in the cabinet need to be moved, the principle of moving low-polluting items to high-polluting items must be followed to avoid high-polluting items from causing damage to the inside of the cabinet during the movement. Large area pollution
5. Principles of using open flames: try not to use open flames in the cabinet! Because the fine particles of impurities generated during the use of an open flame will be brought into the filter membrane area, these high temperature impurities will damage the filter membrane. When it is unavoidable that it must be used, a low-flame Bunsen burner should be used.
