BS EN 1837:2020 pdf download
BS EN 1837:2020 pdf download.Safety of machinery — 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 he designed to avoid adverse stroboscopic effect 141 which can lead to dangerous situations by changing the perceived motion of rotating or reciprocating machinery.
NOTE This can usually be achieved by limitation or 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 electncal 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 ffcct, 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 lailed, 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 1838:2013).
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 rek’vant 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 Luminalres
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 of optical elements:
d) facilitate ease of service, particularly ease of cleaning;
e) comply with EN 60598-1:2015, EN 60598-1:2015fA1:2018;
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 60529:19911. 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.
5.3 Installation
Luminaires shall be mounted in such a way as to:
a) provide the required lighting on the task;
b) avoid interference with the task and hazard to the operator
c) minimize the accumulation of dirt on light source(s) and luminaire(s);
d) facilitate ease of service.
Examples showing the pnnciples of some possible solutions are given in the informative Annex A.
5.4 Availability of illumination
Where failure of the Integral lighting system of the machine can give rise to dangerous conditions the lighting system shall consist of more than one light source. One of these sources shall be supplied from an alternative electrical supply.
5.5 Electrical supply
The lighting system shall be connected to the electrical supply so that it is capable of operation even when the machine is inactive,
NOTE This does not remove the requirement given in EN 60204.1:2018 that it shall be possible to completely disconnect the machint- from the electrical supply.
