National standard for classroom lighting detection
The monitoring method of maintaining average illuminance on the desktop and blackboard of class is based on GB/T 57-28 "Lighting Measurement Method". The average illuminance on the desktop of class is maintained by central distribution method, and 9 points are selected in the classroom by plum blossom distribution method for each classroom monitoring. The illuminance is measured once at the same position on the desktop of class under natural light and artificial lighting respectively, and the average illuminance on the blackboard is measured at 3 points. Turn on all lighting sources for more than 15 min in the detection process, and use curtains to cover the windows to avoid interference from external light sources.
The monitoring instruments are all used after calibration. The classroom lighting evaluation is based on GB7793-21 "Hygienic Standard for Daylighting and Lighting in Primary and Secondary Schools", and the average illumination of the classroom desktop is maintained at ≥ 3lx; The uniformity of illumination on the desk surface is ≥ .7; Blackboard should be set in local lighting, maintain the average illumination ≥5lx, and the uniformity of blackboard illumination ≥ .8; The classroom should not be illuminated by naked lights; The long axis of that tube arrangement is perpendicular to the blackboard surface; According to the National Basic Standards for the Trial Implementation of Physical Education Hygiene Conditions in Schools, classroom lighting should be equipped with more than 9 4W fluorescent lamps, and the hanging height of the lamps from the desktop should be 17~1.9m；; Blackboard lighting should be equipped with two 4W fluorescent lamps and lampshades.
The content of lighting detection in school classrooms
The monitoring content
includes the lighting conditions, such as the average illumination of the desktop after class, the average illumination of the blackboard, the distance between lamps and desks, the lighting power, etc.
monitoring method
the on-site detection is carried out in strict accordance with the fixed method in "Lighting Measurement Method (GB57)". Each classroom measures 12~16 points according to the area of the classroom, and each point is measured for 3 times, and the average value is taken to calculate the average illumination of the class desk. Turn on all light sources in the classroom for 15min before measurement. If the monitoring time is daytime, use thick curtains to cover the windows to avoid interference from external light sources.
evaluation criteria
according to (architectural lighting design standard (GB534-24)), the classroom class is qualified if the desktop illumination reaches 3lx, and the blackboard illumination reaches 5lx.
detection standard of classroom lighting
hygienic requirements for design and installation of general classroom lighting in primary and secondary schools GB∕T 36876-218.