After the installation of the fume hood, the auxiliary facilities such as ventilation system, distribution system, water supply and drainage system should be installed.
After the installation is complete to understand and master the operation of the fume hood, and inspection and acceptance standards is one of the necessary operations, but also to detect whether the installation of ventilation cabinets to meet the requirements of an important means.
How to check acceptance?
The inspection contents of the fume hood mainly include detecting the surface wind speed, noise, electric control system, water supply and drainage system and overall appearance.
The surface wind speed detection is the first to open the glass operation window to the normal operating position, The tester stands 0.5 metres from the glass operating window, using Anemometer to test the wind speed at 100mm from the corner of the glass operation door, the maximum test point distance can not exceed 600mm, the count of every point is 15 seconds, and the speed value is calculated and recorded when the fluctuation is no more than 20%, if more than 20%, The counting time needs to be prolonged, and the count is counted by the maximum value of wind pressure.
The detected data conforms to the standard requirements---0.5±20%m/s can be.
The measured surface wind speed can also be tested using solid carbon dioxide and smoke pens in hot water.
The glass operation door open to the normal use position, the smoke will be placed in the open door of any position to release, to observe whether the smoke can smoothly into the fume cabinet, in the fume cabinet operating surface and the inner wall of the release of smoke, to observe whether the normal entrainment of salt mist into the front.
If there is no eddy current and turbulence in the test, the flow is smooth and the data is good; no smoke no overflow situation, do not affect the operator, the description of qualified, the contrary is the description of unqualified. Other accessories such as air conditioners, doors and windows, ventilation ducts, etc. are also taken into account for testing, as these attachments will, to a certain extent, affect the accurate measurement of ventilation smoke, otherwise they must be tested again.
This method should be used to test the surface wind speed, because the smoke is poisonous and corrosive.
Noise will be harmful to the staff, noise testing, if the high noise, the use of indoor ventilation fume hood fan must be fixed in the outdoor, this can effectively reduce the noise harm to the human body.
Noise testing method is: the use of noise analysis equipment in the operator's location to detect the noise is not higher than 62dB to meet the requirements.
The testing of the electronic control system includes the production standard configuration function, the control system and the load test, and the detected data should be recorded well. Give, drainage system testing in the installation is completed, but also to check whether there is a clear mark, the selection of materials to meet the standards of laboratory use of materials, and do a good test records.
The exterior of the fume hood inspection includes the glass door, the clearance of each part and the appearance of the surface and ventilation system. Main check whether the opening of glass door is flexible, open height is standard, check whether the clearance of each department conforms to the production standard, the clearance of each part is even; Check the appearance is to see whether achieve beautiful, smooth.