NEC Display Solutions of America, Inc.
M311W Installation Guide
Ceiling Mounted and Desktop
Rev 1.0
www.necdisplay.com
M311W Page 2 of 6
Diagrams
and
Distance
Charts
The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of
installation.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling Mounted
Desktop
Distance Chart for popular 16:10 screens
Note:
For screen sizes not indicated on the projection
tables, use the formulas on page 1.
Lens Offset From
Mount Pipe
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Bottom
2.22"
C
Throw Distance
Screen Top
4.56"
5.17"
D
B
Lens Ctr
Screen Ctr
D
2.79
Diagonal Width(W) Height (H)
inches
inches
inches
inches
57
48
30
12
64
-
107
11.0 -
6.6
66
56
35
14
75
-
125
11.0 -
6.6
68
58
36
15
77
-
128
11.0 -
6.6
75
64
40
16
85
-
143
10.9 -
6.6
79
67
42
17
90
-
150
10.9 -
6.6
85
72
45
19
96
-
161
10.9 -
6.6
92
78
49
20
105
-
176
10.9 -
6.6
98
83
52
21
112
-
186
10.9 -
6.6
102
86
54
22
116
-
194
10.9 -
6.6
111
94
59
24
127
-
212
10.9 -
6.6
113
96
60
25
129
-
215
10.9 -
6.6
123
104
65
27
140
-
233
10.9 -
6.6
125
106
66
27
142
-
237
10.8 -
6.6
147
125
78
32
168
-
280
10.8 -
6.5
149
126
79
33
170
-
284
10.8 -
6.5
213
181
113
47
244
-
407
10.8 -
6.5
255
216
135
56
292
-
486
10.8 -
6.5
-7
-10
-12
-5
-5
-6
-6
-4
-4
-5
-5
-3
-3
-4
-4
-7
degrees
D
α
w ide - tele
Screen Size (16:10)
-3
inches
B
C
w ide - tele
inches
