9. Risk Group 3 Safety
To protect untrained end us ers (as cinem a v isitors) the installation shall comply w ith the following installation requirements: Oper a-
tors shall control access to t he beam within the hazard distance or install the produ ct at the height that will prevent spec tators’ eyes
from be ing in the hazard distance. Radiation levels in excess of the limits will not be permitted at any point less than 2.0 meter (SH )
above any surface upon which persons other than operators, performers, or employees are permitted to stand or less than 1.0 meter
(SH) lateral separation from any place where such persons are perm itted to be. In non-cinema env ironments where unr estrained
behavior is reasonably foreseeable, the minimum separation height should be greater than or equal to 3.0 m eter to pr event potential
exposure, for example by an individual sitting on another individual’s shoulders, within the H D.
These values are minimum values and are based on the guidance provided in IEC 62471-5:2015 section 6.6.5.
The end user mu st understand the risk and apply protective meas ures based upon the hazard distance as indicated on the label and
in the user information. Installation method, barriers, detection system or other applicable control measure shall prevent hazardous
eye access to the radiation within the hazard distance.
For example, projectors that have a HD grea ter than 1 m and em it light into an un controlled area
where persons m ay be present
should be positioned in accordance with “the fixed projector installation” parameters, resulting in a HD that does not extend into
the audience area unless the beam is at least 2.0 meter above the floor lev el. In non-cinema environments where unr estrained
behavior is reasonably foreseeable, the minimum s eparation height s hould be greater
than or equal to 3 .0 m eter to pr event potential
exposure, for example by an individual sitting on a nother individual’s shoulders, within the HD. For exam ple, a sufficiently large
separation height may be achieved by mounting the im age projector on the ceiling or through the use of physical barriers.
For applications installed in the USA m arket t he above limits for cinema like environm ents do not apply. The relevant minimum
separation height is 2.5m (8,2 ft) by the F DA CDRH. Non cinema like environments require 2.5 m eter ( 8.2 ft) separation height
and 1.0 me ter (3.3 ft) separation width for areas where restrained behavior is to be expected. All other areas require 3.0 (9.9 ft)
separation height.
RA
TH
PR
RZ
HD
SW
1m
SW
SW
SW
HD
SH
RA TH
RZ
SH
(B) TOP VIEW(A) SIDE VIEW
Image 9-1
A Side View
BTopView
RA Restricted Area
PR Projector
TH Theater
RZ Restriction Zone in the theater
SH Separation Height
SW Separation Width
Regarding the SH Distance: For Cinema applications, the d istance must b e >2m. For C oncert applications,
thedistancemustbe>3m.
Based on national requirements, no person is allowed to enter the projected beam within the zone between the p rojection lens and
the related hazard dis tance (HD). This shall b e physically impossible by c reating sufficient separation height or by placing barriers.
The minimum separation height takes into account the surface upon w hich persons other than operator, per formers or employees
are permitted to stand.
On im age 1-2 a
typical setup is displayed. It m u st be v erified if these minimum requirements are met. If required a restricted zone
(RZ) in the theater must be established. This ca n be done by u sing physical barrier, like a red rope as illustrated in image 1-2.
The restricted area sticker can be replaced by a sticke r with only the symbol.
52
601–0442 BALDER 13/09/2017
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