NEC MT830TM /1030TM - Manual (Page 21)

21
INSTALLATION 40
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 MT830/1030 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%.
39
Formulas(mm)
"H=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=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 top of the optional ceiling mount 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