Safety Information
CP42LH Service Manual
22
020-101686-03 Rev. 1 (08-2016)
Nominal ocular hazard distance
The nominal ocular hazard distance (NOHD) is the distance from the projector where the light
exceeds the maximum permissible exposure (MPE) on the eye and eye injuries can occur. The Skin
Nominal Hazard Zone (SNHZ) is the area where skin burns are possible. This diagram illustrates the
typical SNHZ (A), the NOHD (A + B), and the area (C) that is within permissible limits:
Hazard calculations are dependent on the number of light modules and the lens installed. This table
lists hazard distances for Christie projector lenses with the zoom adjusted to its most hazardous
position. Contact Christie support for assistance calculating hazard distances specific to your
installation.
The installation setup must prevent access to the nominal ocular hazard area. Failure to
comply results in death or serious injury.
Light
Modules
Projection Lens
4K
Throw
Ratio
Extended
Source
NOHD (m)
Skin
NHZ
(m)
7
1.25-1.45 DLPCine HB Zoom Lens (108-274101-01)
1.31:1
1.65
0.50
12
1.25-1.45 DLPCine HB Zoom Lens (108-274101-01)
1.31:1
2.8
0.65
7
1.25-1.83 DLPCine HB Zoom Lens (108-342100-01)
1.66:1
2.05
0.60
12
11.25-1.83 DLPCine HB Zoom Lens (108-342100-01)
1.66:1
3.50
0.80
7
1.45-2.05 DLPCine HB Zoom Lens (108-335102-01)
1.86:1
2.30
0.70
12
1.45-2.05 DLPCine HB Zoom Lens (108-335102-01)
1.86:1
3.90
0.80
7
1.6-2.4 DLPCine HB Zoom Lens (108-336103-01)
2.17:1
2.65
0.75
12
1.6-2.4 DLPCine HB Zoom Lens (108-336103-01)
2.17:1
4.55
1.05
7
1.8-3.0 DLPCine HB Zoom Lens (108-337104-01)
2.71:1
3.30
0.80
12
1.8-3.0 DLPCine HB Zoom Lens (108-337104-01)
2.71:1
5.65
1.30