Installation - Reichert AP250 User Manual

Installation

The AP250 should be installed according to the following
procedures:
1. If using a wall mount, it is best to locate a wall stud
to support the projector's weight.
2. The following distances are important in the set-up
of a refracting room:
REFRACTING DISTANCE (RD) The distance from
the patient's eye to the screen.
PROJECTION DISTANCE (PD) The distance from
the slide to the screen.
LETTER HEIGHT (LH) The height of a 20/200
character should be equal to the refracting distance
times the tangent of 50 minutes of arc or .014545.
LH (inches) or (mm) = RD (inches) or (mm) x .014545
For example, a refracting distance of 240 inches (20
feet) will require a 20/200 height of 3.49 inches (240
inches x .014545 = 3.49 inches) or for a 4000 mm (4
m) refracting distance, you will require a letter height
of 58.18 mm (4000 mm x .014545 = 58.18 mm).
3. Determine the refracting distance by measuring the
distance from the patient to the screen. Please refer
to Figures 1 and 2, below, which show combinations
of refracting and projection distances achievable with
this system.
PROJECTION RANGE LIST
Projection Minimum
Distance Refracting
ft m
10 3.0
11 3.3
12 3.6
13 3.9
14 4.2 10.4 3.2
15 4.5 11.1 3.4
16 4.8 11.8 3.6
17 5.1 12.6 3.8
18 5.4 13.3 4.1
19 5.7 14.0 4.3
20 6.0 14.8 4.5
21 6.4 15.5 4.7
22 6.7 16.2 4.9
23 7.0 17.0 5.2
24 7.3 17.7 5.4
25 7.6 18.4 5.6
26 7.9 19.2 5.8
Figure 1 - Projection Range List in feet and meters.
6
Maximum
Refracting
Distance Distance
ft m ft m
7.4 2.3 11.6 3.5
8.2 2.5 12.7 3.9
8.9 2.7 13.0 4.2
9.6 2.9 15.0 4.6
16.2 4.9
17.3 5.3
18.5 5.6
19.6 6.0
20.8 6.3
21.9 6.7
23.1 7.0
24.3 7.4
25.4 7.7
26.6 8.1
27.7 8.4
28.9 8.8
30.0 9.2
4. Install the projector screen.
5. If attaching the AP250 to a mount, loosen the clamp-
down screw (see page 5, #6) and insert the projector
mount onto the ball. Tighten screw, allowing for some
movement of the projector for final positioning. Fully
tighten the screw after final adjustment and alignment
of the system.
6. Make sure the voltage indicator number corresponds
with the available local mains.
7. Plug power cord into AC inlet and into a wall power
outlet. Set the power switch to the "ON" position.
NOTE: For proper operation, the remote typically needs
to be more than 5 ft (1.5 m) away from the projector.
Make sure no objects that could interrupt remote control
signals are located between remote control and projector.
PROJECTION RANGE GRAPH
30
25
20
15
10
5
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
PROJECTION DISTANCE (ft)
Figure 2 - Projection Range Graph in feet.
Maximum
Minimum
13800-101-Rev. E