NEC MT830 - Manual (Page 22)

22
INSTALLATION 42
WARNING
• Only use your LCD projector on a solid, level surface. If the
projector falls to the ground, you can be injured and the
projector severely damaged.
• Do not use the LCD projector where temperatures vary
greatly. The projector must be used at temperatures
between 32˚F (0˚C) and 104˚F (40˚C).
• Do not expose the LCD projector to moisture, dust, or
smoke. This will harm the screen image.
• Ensure that you have adequate ventilation around your
LCD projector so heat can dissipate. Do not cover the
vents on the side or the front of the projector.
Ceiling Installation
Installing your MultiSync MT830+/MT1030+/
MT1035+ LCD Projector on the ceiling must be done by
a qualified technician. Contact your NEC dealer for more
information.
Do not attempt to install the projector yourself.
NOTE : Distances may vary
±
5%.
41
MT830+ / MT1030+
Formulas(mm)
H (mm) = Horizontal Screen Width
M = 1.25H / 33.02(Projection magnification)
A = C/cos
α
B = 85.2 + 8M
C (WIDE)=53.2
ן M – 85.609
C (TELE)=C (WIDE) ן 1.3055
F = {(3H/8) – (85.2 + 8M)}
= 1.906M – 85.2
Formulas(inch)
H (inch) =Horizontal Screen Width
M = 1.25H / 1.3(Projection magnification)
A = C / cos
α
B = (85.2+8M)/25.4
C (WIDE) = 2.0945
ן
M – 3.37
C (TELE) = C(WIDE) ן 1.3055
F = {(3H / 8) – (85.2 + 8M)} / 25.4
= (1.906M – 85.2)/25.4
A : Distance between the lens and the screen center
B : Vertical distance between the projector bottom and the screen center
C : Horizontal throw distance between the screen surface and the lens
F : Vertical distance between the projector bottom and the top of image
A
C
B
F
α
MT1035+
Formulas (mm)
H (mm) = Horizontal Screen Width
M = 1.25H / 33.02 (Projection magnification)
A = C / cos
α
B = 84.3 + 7.69 ן M
C (WIDE) = 49.2 ן M – 72.789
C (TELE) = C (WIDE) ן 1.31
F = 1.982 ן M – 84.3
Formulas (inch)
H (inch) = Horizontal Screen Width
M = 1.25H / 1.3 (Projection magnification)
A = C / cos
α
B = 84.3 + 7.69 ן M / 25.4
C (WIDE) = 1.93701 ן M – 3.37
C (TELE) = C (WIDE)
ן
1.31
F = (1.982 ן M – 84.3) / 25.4