Clean workshop workshop self-cleaning, illumination and uniformity test
Clean pharmaceutical cleanroom pharmaceutical cleanroom self-cleaning, illumination and uniformity test
The purpose of the clean room self-cleaning test is to determine the time it takes for a non-unidirectional flow clean room or clean area and its system to return to a stable cleanliness level after a brief particle emission in the clean space; The HVAC system of the clean room is in...
Text label: Self-cleaning test in clean workshop, illuminance and uniformity test in clean workshop
Clean pharmaceutical cleanroom workshop self-cleaning, illumination and uniformity test
The purpose of the clean room self-cleaning test is to determine the time it takes for a non-unidirectional flow clean room or clean area and its system to return to a stable cleanliness level after a brief particle emission in the clean space; The HVAC system of the clean room is in operation; set the counter or photometer according to the instructions; the sampling probe should not be placed directly under the high-efficiency filter or room air supply, identify the poor airflow area, turbulent area, etc. in the test area, and sample The probe should be slightly higher than the working surface height or the height where the product may be exposed; particle dust is generated in the clean workshop or clean area when the air handling system is working, and the initial particle concentration is raised to 1000-10000 times the target cleanliness level; use a The remote instrument can measure 4 sampling points, and the sampling tube as long as 8m can extend out of the clean area to the counter and photometer. Start time, and start measuring the aerosol concentration, record the aerosol concentration value every minute with a sampling period of 6-12S, until the particle count falls back to 10 times the target cleanliness level, record and give the particle concentration of each sampling point and Corresponding graph of time; self-cleaning time is expressed in minutes, the time it takes for the particle concentration to decrease by 2 orders of magnitude, that is, the time for each location to go from 1000 times the target concentration to 10 times the target concentration.
The purpose of illuminance and uniformity testing is to verify that the illuminance and uniformity of the installed luminaires meet the specified requirements; although the test procedures to be followed vary depending on the actual luminaire arrangement, some common items are applicable to all Tests, such as luminaire conditions, measurement conditions, instruments and equipment, draw a representative grid for the test location. Instruments and equipment required: ceiling plan or floor plan, such as a floor plan that may include furniture or equipment; tape measure; bright colored dots or other means of marking the location of the test grid; up to the height of the working surface, generally 750mm high The portable test stand, instruments and photosensors can be placed horizontally on the stand. For high-intensity or fluorescent lighting systems in relatively new lamps, the lighting time should be at least 100 hours before measurement; for ordinary-sized incandescent lamps, the lighting time should be at least 20 hours; high-intensity lamps or fluorescent lighting systems must be illuminated for at least 2 hours before measurement , to ensure normal operating output and normal operating temperature. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean workshops and purification plants.
Light measurement should be carried out under actual working conditions, all lighting in the area, including general lighting, special lighting and supplementary lighting, should be in normal use; the height of the working surface should be measured, and at the specified working point This point has both natural light and electric lighting; verify that the thermal condition of the space is stable; pay attention to and consider the influence of natural light sources. During the test, determine the position of the measurement grid, which should include a representative area of u200bu200bthe working plane, obstacles above the working plane, avoid pillars, tall equipment, filing cabinets, etc., should be marked; In this method, the average illuminance can be kept within 10% of the value obtained by the grid method. The grid method is to divide the area into 0.6m squares, take readings in each square and calculate the average; get the readings , the photosensitive element is in a horizontal position and 750mm from the ground.
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