BS EN 1837:2020 pdf free download – Safety of machinery一Integral lighting of machines.
4.5 Colour quality
The colour rendering properties and colour appearance of the light source(s) and/or luminaires shall be suitable for colour discrimination of the visual task and for operator comfort. A minimum CR1 = 80 light source shall be used for machines requiring significant human intervention or attention.
Where lighting controls are present to adjust the output of the light source(s) and/or luminaires it shall be ensured that this minimum CR1 is achieved at all possible settings.
4.6 Stroboscopic effect
The lighting system shall be designed to avoid adverse stroboscopic effect [4] which can lead to dangerous situations by changing the perceived motion of rotating or reciprocating machinery.
NOTE This can usually be achieved by limitation of the magnitude of temporal light modulations of the lighting system and/or by avoiding that the modulation frequency of the light coincides with motion or rotation frequencies of the machinery, for example by use of DC electrical supply for light sources, or by operating the light sources at high frequencies. LED (light emitting diode) lighting or fluorescent lighting can be suitable lighting systems producing minimum adverse stroboscopic effect, provided the control gear modulation frequency Is sufficiently high or the modulation depth of the residual light modulation is sufficiently low.
4.7 Ergonomic principles
Ergonomic principles shall be taken into consideration for integral lighting systems of a machine e.g.:
— adjustable luminaires shall be stable in their position, but easy to move if necessary, particularly if changing from a seated to a standing position;
— lighting shall be adjustable or installed in a way that right and left handed operators are able to work without disturbing shadows;
— requirements of EN ISO 13732-1:2008 shall be met;
— actuators shall be adequate for the intended use.
4.8 Emergency lighting
In machines that may be operational at times when the supply to the regular lighting of the machinery has failed, and where size or configuration of machinery reduces the effectiveness of site emergency lighting for machine operators, additional emergency lighting shall be provided (see EN 1838:20 13).
5 Lighting equipment and installation
5.1 Light sources
Light sources shall be chosen to be safe in operation, energy effIcient and not present a hazard to the machine operator. The chosen light source shall comply with the relevant standard for the light source technology installed (see bibliography for a non-exhaustive list).
NOTE It is advisable that in general light sources are enclosed to protect the operator from Injury caused by e.g. damaged lamps, excessive heat or emission of harmful radiation.
5.2 Luminaires
Luminaires shall be designed to:
a) provide the required lighting on the task;
b) minimize the accumulation of dirt on light sources and optical surfaces;
c) minimize premature ageing oloptical elements;
d) facilitate ease of service, particularly ease of cleaning:
e) complywith EN 60598-1:2015, EN 60598-1:2015/A1:2018;
f) be compatible with the machine, for example withstand vibration, radiation, etc.;
g) be fit for purpose and have suitable protection for environmental conditions, complying with EN 60529:1991k, EN 60529:1991/A1:2000, EN 60529:1991/A2:20132 and EN 62262:2002 where relevant;
h) comply with EN 60204-1:2018 and EN 60204-31:2013. EN 60204-32:2008, EN 60204-33:2011 where relevant.