10 - ENGLISH
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Hazard distance (IEC/EN 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
D3
D4
HD
D1
D2
HZ
HZ
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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 combination of the projector and the projection lens which the hazard distance exceeds 1 m (39-3/8") and is
categorized as risk group 3 is as follows.
Model No.
Projection lens Model No.
Risk group
PT-MZ20K
*1
ET-EMT750, ET-EMT850
Risk group 3
PT-MZ17K
*2
ET-EMT750, ET-EMT700
ET-EMT850, ET-EMT800
Risk group 3
PT-MZ14K
*3
PT-MZ11K
*3
ET-EMT850, ET-EMT800
Risk group 3
*1
When PT-MZ20K is used with the Zoom Lens (Model No.: ET-EMT750, ET-EMT850) attatched, the hazard distance exceeds 1 m
(39-3/8"), and regardless of the use condition, the throw ratio is larger than 2.0:1. In this case, it is catagorized as the risk group 3.
*2
When PT-MZ17K is used with the Zoom Lens (Model No.: ET-EMT750, ET-EMT850, ET-EMT700, ET-EMT800) attatched, the
hazard distance exceeds 1 m (39-3/8"), and regardless of the use condition, the throw ratio is larger than 2.0:1. In this case, it is
catagorized as the risk group 3.
*3
When PT-MZ14K / PT-MZ11K are used with the Zoom Lens (Model No.: ET-EMT850, ET-EMT800) attatched, the hazard distance
exceeds 1 m (39-3/8"), and regardless of the use condition, the throw ratio is larger than 4.0:1. In this case, it is catagorized as the
risk group 3.
