Christie Christie HD User Manual download pdf (Page 27)

Section 2: Installation and Setup

M Series User Manual 2-9

020-100009-08 Rev. 1 (05-2013)

adequate airflow around the projector, allow free air exchange to the projector with a minimum clearance of

25cm (10-inch) on the left, right and rear sides of the projector from any walls or other obstructions. Never

obstruct the air exchange to the projector.

2.2.8 Other Considerations

Other considerations and tips to improve your installation:

• Keep the ambient temperature constant and below 40°C (104°F). Keep the projector away from heating and/

or air conditioning vents. Changes in temperature may cause drifts in the projector circuitry, which may

affect performance.

• Keep the projector away from devices that radiate electromagnetic energy, such as motors and transformers,

slide projectors, speakers, power amplifiers, elevators, etc.

• Use a screen size appropriate for the venue but not larger than required. Installing a large screen in a small

room is similar to watching television at a close range; too large a screen can overpower a room and interfere

with the overall effect. As a rule, be no closer than 1.5 times the width of the screen.

2.3 Projector Position

2.3.1 Throw Distance

Throw distance is the distance measured from the front feet of the projector to the screen. This calculation

determines if there is enough room to install your projector with a desired screen size and if the image will be

of the right size for your screen.

To estimate the throw distance take the horizontal width of the screen and multiply it by the lens throw ratio.

The result determines approximately the distance the projector should be positioned from the screen to project

a focused image large enough to fill the screen. For example, using a 0.73:1 lens, throw distance would

roughly be 0.73 x screen width.

IMPORTANT! Use the lens and screen size to calculate the precise throw distance using the the lens throw

calculator provided in the Dealer Section of the Christie Website, or use the tables provided

in 020-100221-XX. Due to lens manufacturing tolerances for lens focal length, actual throw

distance can vary ±5% between lenses with the same nominal throw ratio.

2.3.2 Vertical and horizontal position

The correct vertical and horizontal position of the projector in relation to the screen depends on the lens type

and the screen size. Ideally, the projector should be positioned perpendicular to the screen. This way, the image

will appear rectangular instead of keystoned (trapezoidal).

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Christie Christie HD User Manual Page 27