According to the investigation of the compilation group of the “Clean Plant Design Code”, the lowest illuminance considered suitable for the work was counted, and the result was slightly higher than 150lx. Therefore, it is appropriate to set the lower limit of general lighting to 150lx, although there is a higher working efficiency at 300lx. According to a large number of acceptance tests, it is found that it is more difficult for the minimum illuminance value to reach 200lx or more. In fact, 150lx is already quite bright, because the average illuminance is much higher than it. It is of little significance to use average illuminance in the work area, because there are some points below 150lx, which are not suitable for work. From the point of view of the precision of the operation of the pharmaceutical factory, it is appropriate to reduce the minimum illumination to 150lx.
clean room lights fixture illuminace requirements and measurement method
Local lighting can be used for the special requirements of high illuminance operation inventory, and it is not appropriate to generally increase the minimum illuminance standard of the entire workshop. In addition, the occasions should be distinguished. The lighting of the non-production room should be lower than that of the production room. However, considering the adaptation of light and shade, the illuminance should not be too different, and the non-production room should generally not be less than 100lx.
The lighting system of a clean room is different from ordinary office lighting. All lighting fixtures are required to comply with the “Clean Room Engineering Construction and Acceptance” standard. The fixtures must have a transparent lampshade made of organic glass or other materials. Dust collection and other characteristics. Among them, the requirements for the contrast of the clean room environment are relatively strict.
①Requirements for illuminance measurement The indoor illuminance measurement must be stable at room temperature and the light output of the light source is stable before the measurement.
②Measurement method of illuminance:
First, the measuring point of illuminance should be 0.85m away from the ground, and the points should be arranged at a distance of 1~2m, and the measuring point should be 1m away from the wall.
Second, record the measured value and calculate the total average illuminance
③ Qualification standard: It should meet the design requirements. According to the requirements of (Clean Workshop Design Code), the uniformity of general lighting in a clean room should not be less than 0.7.
