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Read this fi rst! (continued)
■ Hazard distance (IEC 62471-5:2015)
The distance from the projection lens surface, at which the emission reaches the
Accessible Emission Limit (AEL) of risk group 2, is known as the hazard distance (HD)
or safety distance. The area where the emission exceeds the Accessible Emission Limit
of risk group 2 is called the hazard zone (HZ).
Within the hazard zone, never look into the light projected from the projector. The eyes
may be damaged by direct irradiation even if you look at the light just for a moment. If
you are outside the hazard zone, it is considered to be safe in all circumstances except
deliberately staring into the light projected from the projector.
HD
■ Risk group
The combination of the projector and the projection lens is categorized as risk group 2
when the hazard distance is 1 m (39-3/8") or less. It is categorized as risk group 3 when
the hazard distance exceeds 1 m (39-3/8"), and it will be for professional use instead of
consumer use.
In case of risk group 3, there is a possibility of damaging the eyes by direct irradiation
when looking into the projection light from inside the hazard zone even for a moment.
In the case of risk group 2, safe use without damaging the eyes is possible in all
circumstances except deliberately staring into the light projected from the projector.
The risk group for the combination of the projection lens and a compatible projector is as
follows.
Projector model
PT-RQ50K
4-ENGLISH
D1
HZ
D2
Risk group
Risk group 2
D3
HZ
D4
HD
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