Consequently, about 17 lamps of 65 W each are to be installed.
Depending on the color of the room, these values may vary. Lists and tables provide you with
numerous specifications on the so-called illumination efficiency factor which allows for more
accurate calculations.
In order to prevent accidents at work, please note the following:
• Tubular fluorescent lamps can create a stroboscopic effect by means of which the percei-
ved movement of objects is subject to optical illusion (e.g in the case of quickly rotating
jaw chucks of lathes).
• Increases in the illumination intensity are only registered if the original illumination is mul-
tiplied by a factor of at least 1.5. Illumination of working areas must not fall below the fac-
tor 0.8 of nominal illumination intensity.
• At no time must the illumination of working areas fall below factor 0.6 of nominal illumina-
tion intensity.
• Highly varying degrees of brightness strain the human eye very quickly (this causes adap-
tion difficulties).
• Glare impairs a person's sight and health.
• The ageing of light sources is a factor which must be taken into consideration.
7.0 Maintenance
When using the instrument in compliance with the instruction manual, no special mainten-
ance is required.
However, should the instrument function improperly during normal use, our repair depart-
ment will repair the instrument without delay.
Any adjustments, maintenance and repairs have to be avoided when the instrument is ope-
ned and may only be carried by authorised specialists.
The function is not guaranteed for any instrument modification or transformation.
If the instrument is dirty after usage, we advise to clean it by using a humid cloth and mild
household detergents. Never use acid detergents or solvents.
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Calculation example/Maintenance
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