BS EN 1837:2020 pdf download

BS EN 1837:2020 pdf download.Safety of machinery一Integral lighting of machines.

4.2 Illuminance
The required illuminance depends upon the visual task and shall be sufficiently high and uniform as to enable a safe and comfortable perception of the details of the visual task.
In general a maintained illuminance of at least 500 lx with a minimum unifonnity of 0,7 on the task area shall be provided. If there is more than one task area in or at a machine, each task area shall be considered separately. The immediate sulTounding areas shall have a maintained illuminance of at least 300 lx with a uniformity ofat least 0,3.
Where a visual aid or protective visor is required for use with the machine, the illuminance shall be multiplied by the reciprocal value of the transmittance of this device. Where the transmittance is unknown the illuminance shall be increased by at least 50%.
In control cabins or where processes are affected by light, the above illurninance may be reduced.
NOTE Lighting controls can be helpful for increasing and reducing the illuminance, e.g. by dimming or
switching or by mechanical adjustmenL
4.3 Glare
The integral lighting system shall avoid direct giare (disability and discomfort glare) both to the machine operator and other workers in adjicent areas by preventing any direct view onto the integral light source. Glare caused by reflections from the integral lighting of the machine during use shall be avoided within the task area
NOTE It Is possible to achieve this by suitable shielding of the light source(s), by location and direction of the luminaire(s), and by the use of light. matt surface tinishes.
4.4 Directionality
The lighting system shall be designed and adjusted to avoid disturbing shadows on the visual task The directionality of the lighting shall ensure a perception of form which is appropriate for the visual task.