There are many acceptance criteria for fume hoods. The following are commonly used test indicators:
1. Detection method of wind speed: open the glass operation window to the normal operation position, and the inspector shall test the wind speed at a position of 0.5 meters on one side of the glass operation window, and the distance between the test points shall not be greater than 100mm from the corner of the glass operation door. 600mm, the count of each point is 15S during detection, and the speed value is calculated and recorded when the fluctuation is not more than 20%. If the fluctuation is more than 20%, the counting time can be increased.
2. Surface wind speed detection method: Open the glass operating door to the normal use position, place the smoke at the position where the door is opened to release, observe whether the smoke enters the fume hood smoothly and smoothly, release the smoke on the operating surface and the inner wall of the fume hood, observe Whether smoke is normally entrained into the front of the fume hood.
3. Detection of the electronic control system: In addition to the functions and control systems configured according to the production standards, the electronic control system should also carry out a load test and make a record. The brightness of the lighting system is not less than 400 lux. If the lighting is set outside the cabinet, there must be fireproof, dustproof, anticorrosion, and explosion-proof transparent plates; if it is set inside the cabinet, there must be protective measures.
