Leica AP250 User manual

13800-101-Rev. A 13
AP250
Automated
Projector
Users Guide

13800-101-Rev. A 1
Contents
Introduction The AP250 is used for measuring visual acuity. 2
Package Contents Your new Leica AP250 and accessories 2
Safety Precautions Safety Precautions 2
Instrument Components Instrument Components 3
Installing the AP250 Installation Procedures 4
Alignment Optimally Focusing the AP250 5
Instructions for Use - Remote Control Changing the Emission Code 6
Programming 7
Masking Options 7
Care and Maintenance Changing the Halogen Bulb 8
Changing the Remote Control Batteries 8
Changing Fuses 8
Changing the Voltage 8
Routine Care 8
Screen Cleaning 8
AP250 Slide Library Slide Library 9
Technical Specifications Technical Specifications 9
Letter Sizing Charts Letter Sizing Charts in Feet and Meters 10
Warranty Warranty 12
© Reichert Ophthalmic Instruments, A Division of Leica Microsystems, Inc. All rights reserved.
No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
recording, or otherwise, without the prior written permission from Reichert Ophthalmic Instruments.

2 13800-101-Rev. A
Introduction
Congratulations on your purchase of the AP250 Automated
Projector.
In the field of subjective refraction, the AP250 is used for
measuring visual acuity.
This Users Guide is designed as a training and reference
manual. We recommend you carefully read and follow the
steps in this guide to ensure optimum performance from your
new instrument.
Please retain this guide for future reference and to share with
other users.
For additional copies or assistance with this product, contact:
 An authorized Reichert Ophthalmic Instruments dealer,
or our
 Customer Service Department by telephone at
[phone], by fax at [phone], or by e-mail
at [email protected].
Package Contents
Your new AP250 Automated Projector and accessories were
carefully packed and checked prior to shipment; however,
please check condition and contents upon delivery. In addition
to your AP250, this shipment should include:
1 Projection Screen
1 Spare Halogen Bulb
1 Power Cord
1 Dust Cover
1 Remote Control
2 Hexagon Keys (3mm and 5mm)
2 Fuses 250ma (230V)
2 Fuses 500ma (110V)
1 Table Base
1 Pair of red/green polarizing spectacles
4 AAA-sized batteries
Safety Precautions
 Except for changing the Halogen bulb and replacing the
fuses, any repair or service on the AP250 must be per-
formed only by authorized Reichert Ophthalmic Instru-
ments personnel.
 Only qualified and trained personnel should operate the
AP250.
 Training for operating personnel is the sole responsibility of
the owner.
 Plug the AP250 only into a grounded electrical receptacle.
Do not remove or obstruct the grounded electrical connec-
tion or damage to the instrument or injury to the operator
may occur.
 The line voltage setting on the instrument should agree
with the local line voltage. Otherwise, damage to the
instrument or injury to the operator may occur.
 Always use the power switch when turning the unit off.
Turn the instrument off when not in use.
 Do not cover any ventilation slots.
 Do not use the AP250 in the presence of flammable
anesthetics and volatile solvents such as alcohol, benzine
or similar agents.
 Do not set up the instrument in humid conditions. Avoid
dripping or splashing water near the instrument.
 Use only accessories specified in this manual. If you intend
to use other accessories, consult an authorized Reichert
Ophthalmic Instruments dealer or our Customer Service
Department.
 Never look into the AP250's light source.
 Disconnect the power cable prior to replacing the AP250's
Halogen bulb. Allow the lamp to cool down a sufficient
amount of time or injury (burning) may occur.
Symbol Information
The following symbols appear on the instrument:
CAUTION - Indicates that important operating
and maintenance instructions are included
in this Users Guide.
Type B Product Classification
Class 1 Equipment, Continuous Operation
Protective Earth
Dangerous Voltage

13800-101-Rev. A 3
7
6
1
3
2
4
5
9
10
11
Instrument Components
1. Projector Head
2. Projection Lens
3. Window for Remote Detection
4. Base
5. Remote Control Unit
6. Hexagon Screw
7. Hinge for Tilting Projector
8. Mounting Screw
9. Power Switch
10. Fuse Compartment with Voltage Indicator
11. Power Connector
12. Halogen Bulb Assembly
13. Chart Focusing Control
14. Distance Focusing Control
8
13
12
14

4 13800-101-Rev. A
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.
4. Install the projector screen.
6. If attaching the AP250 to a mount, loosen the mounting
screw (see "Instrument Components," p. 3, #8) 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.
NOTE: There should be a distance > 5 ft. (1.5 m) between
remote control and the projector. Make sure no objects
that could interrupt remote control signals are located
between remote control and projector.
7. Make sure that voltage indicator number corresponds with
the available local mains.
8. Plug power cord into AC inlet and into a wall power outlet.
Set the power switch to the ON position.
PROJECTION RANGE LIST
Projection Minimum Maximum
Distance Refracting Refracting
Distance Distance
FT M FT M FT M
10 3.0 7.4 2.3 11.6 3.5
11 3.3 8.2 2.5 12.7 3.9
12 3.6 8.9 2.7 13.0 4.2
13 3.9 9.6 2.9 15.0 4.6
14 4.2 10.4 3.2 16.2 4.9
15 4.5 11.1 3.4 17.3 5.3
16 4.8 11.8 3.6 18.5 5.6
17 5.1 12.6 3.8 19.6 6.0
18 5.4 13.3 4.1 20.8 6.3
19 5.7 14.0 4.3 21.9 6.7
20 6.0 14.8 4.5 23.1 7.0
21 6.4 15.5 4.7 24.3 7.4
22 6.7 16.2 4.9 25.4 7.7
23 7.0 17.0 5.2 26.6 8.1
24 7.3 17.7 5.4 27.7 8.4
25 7.6 18.4 5.6 28.9 8.8
26 7.9 19.2 5.8 30.0 9.2
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
REFRACTING DISTANCE (FT.)
5
10
20
15
25
30
PROJECTION DISTANCE (FT.)
PROJECTION RANGE GRAPH
Maximum
Minimum
Figure 1 - Projection Range List in meters and feet. Figure 2 - Projection Range Graph in feet.

13800-101-Rev. A 5
Z
Alignment
You can choose an optimum projection distance when
patient and projector are equally away from the
projection screen.
Images can be optimally focused at projection distances
between 10 ft. (3 m ) and 26.5 ft. (8 m ).
1. Project a 20/200 or 0.1 " Z " (or other characters) onto
the screen by pressing the key.
2. Check the three dimensional alignment of the system.
The projector is optimized when the projection
screen is angled to direct light to the patients head.
Place a mirror on the screen. The light should project
where the patient's head would be (see Figure 4,
below).
3. Adjust the image positioning on the screen. It may be
necessary to adjust the projector and the screen.
Secure projector by tightening mounting screw .
4. Determine the proper letter size based on the
refracting distance used. Refer to Figure 3, below,
and the Letter Sizing Charts at the end of this manual
(see Figures 9 & 10, pp. 10 - 11).
5. Attach Letter Sizing Chart to the screen.
6. Open the unit's projector head cover by lossening the hexagon
screw located on the bottom side of the projector head (see
Instrument Components, p.3, #6).
6. Move the AP250's Chart Focusing Control and Distance
Focusing Control (see "Instrument Components, p. 3, #13 & #14)
until the 20/200 or .01 "Z" is in sharp focus and fills the bracket
on the Letter Sizing Chart, as shown in Figure 3.
CAUTION: Properly setting focusing and distance controls
requires that the projector head cover be opened while
the unit is plugged in and turned on. Utilize only the Chart
Focus Control and the Distance Focusing Control (p. 3, #
13 & #14) to obtain the proper focus. Do not touch any of
the other internal components while setting the focusing
and distance controls.
Note: To obtain longer refracting distances in small rooms, a
mirror or system of mirrors can be used. A high quality front
surface mirror is required. See Figure 5, below, as an example
of arrangement of a short room with full 20 foot refracting
distance.
To prevent interference with the operation of the Remote
Control window, care should be taken not to position any bright
lights directly toward the front of the AP250.
Figure 3 - Reduced-sized version of Letter Sizing Chart
(not to scale -- see Letter Sizing Charts on pp. 10-11).
Figure 4 - Checking three dimensional alignment.
Figure 5 - Using a mirror system in a small room.
8.53
7.92
7.32
6.71
6.10
5.49
4.88
4.27
3.66
3.05
2.44
30
28
26
24
22
20
18
16
14
12
10
8
29
27
25
23
21
19
17
15
13
11
9
7
8.83
8.23
7.62
7.01
6.40
5.79
5.18
4.57
3.96
3.35
2.74
2.14
METERS FEET
REFRACTING DISTANCE
LETTER SIZING CHART
➠
➠
AP250
Screen
Patient
Spot of
Light on
Wall
Screen
Patient
AP250
Small
Mirror
Patient
Mirror
Mirror
9.14

6 13800-101-Rev. A
Instructions for Use - Remote Control
The AP250 is operated by a sophisticated remote control that is
divided into various sections for ease of use (see Figure 6,
below).
CHANGING THE EMISSION CODE
The codes of the projector and remote control are factory set
to 0000. It is advisable to change the emission code of the
Remote Control unit if several projectors are used in the same
room, thus avoiding any interaction.
To change the code, follow the steps below:
1. Open the battery compartment on the rear side of the
remote control (see Figure 7, p. 7). Select a new
combination of switch settings by moving the switches
(with a small pointed object). Sixteen combinations are
possible.
2. Turn the projector off. Position the Remote Control at least
5 ft. (1.5 m) away from the AP250's Window for Remote
Detection. Press the IN Program Key while simultaneously
switching on the projector.
Figure 6 - Remote Control Unit
Indicator Light
Red/Green Test
Binocular Balance Test
Illiterate Charts
Children Charts
Letter Charts
Number Charts
Masking Options
Eye Diagram
Filters
Special Charts
Program Keys
Halogen Bulb On/Off

13800-101-Rev. A 7
3. The AP250 will start with a short beep. Continue to press
the IN Program Key until you hear a longer beep. The code
setting is now complete. Release the IN Program Key and
continue operation of the AP250.
NOTE: The red indicator light flashes when pressing any
remote control function, indicating that a signal is being
sent and batteries are charged.
PROGRAMMING
The AP250 can record up to two (2) slide sequence programs,
including masks. Follow the steps below to store, edit and
interrupt a programed slide sequence.
Storing a Slide Sequence
1. Press Program Key 1 or 2.
2. Press the IN Program Key.
3. Press the first slide of the desired slide sequence.
4. Confirm the slide selection by pressing the NEXT Program
Key.
5. Press the subsequent slides of the sequence, confirming
each slide by pressing the NEXT Program Key.
6. After pressing the final slide of the sequence, press the
OUT Program Key. The slide sequence is now stored in the
selected order as program 1 or 2.
Editing a Stored Slide Sequence
1. Press the Program Key (1 or 2) you want to edit.
2. Press the NEXT Program Key until the slide to be changed
appears on the screen.
3. Press the IN Program Key.
1 2 3 4
ON
Figure 7 - Changing the Remote Control's Switch
Settings
4. Press the new slide.
5. Confirm the new slide selection by pressing the NEXT
Program Key.
6. Press the OUT Program Key. The new slide sequence is
now stored.
Interrupting a Slide Sequence at a Defined Point
1. Press the Program Key (1 or 2) you want to interrupt.
2. Press the IN Program Key.
3. Press the NEXT Program Key until the slide appears that
you want to conclude the sequence.
4. Press the OUT Program Key. The new slide sequence is
now stored.
Using the Program Sequence
1. Press the Program Key (1 or 2).
2. Press NEXT or BACK to display the slide selections within
your programmed slide sequence.
MASKING OPTIONS
The AP250's masking options allow the operator to isolate
horizontal lines, vertical lines and individual charts. See Figure 8
below for functions of masking buttons.
Battery
Compartment
Switch Settings
RIGHT VERTICAL
MASK OR MOVE MASK
TO THE RIGHT SIDE
OF CHART
LEFT VERTICAL
MASK OR MOVE MASK
TO THE LEFT SIDE
OF CHART
UPPER HORIZONTAL
MASK OR MOVE MASK
UPWARDS
LOWER HORIZONTAL
MASK OR MOVE MASK
DOWNWARDS
ISOLATES INDIVIDUAL
CHARACTERS
TOP HORIZONTAL
MASK OR FULL VIEW
Figure 8 - Functions of masking buttons.

8 13800-101-Rev. A
Care and Maintenance
WARNING: Risk of electric shock. Always disconnect
the power cord from the wall and the instrument
before performing any of the following care and
maintenance procedures.
CHANGING THE HALOGEN BULB
WARNING: Do not touch the Halogen Bulb if the unit
has been in use. To remove the Halogen Bulb, use a
thick cloth or wait until it has cooled.
1. Open the top portion of the projector housing by loosening
the hexagon screw located underneath the front portion of
the AP250 head (see "Instrument Components, p. 3, #6).
Simultaneously grasp the Halogen Bulb Fastening Knob
and the copper plate located beneath it. (see Figure 8,
below). Slightly turn the knob counterclockwise, being
careful not to allow the copper plate or knob to disengage.
Continue turning slowly until both the knob and copper
plate are loose enough to fall into your hand.
2. Remove the Halogen Bulb by lightly pulling upwards on the
Halogen Bulb Connection and then replace the Bulb.
CAUTION: Do not touch the Halogen Bulb as
fingerprints on the glass will shorten the Bulb's life.
3. Make sure the Bulb is correctly seated in the holder and
tighten the Halogen Bulb Fastening Knob.
4. Shut the top portion of the projector housing; reconnect
the power cord and turn the projector on.
NOTE: If illumination is not uniform, call your Leica dealer
or our Customer Service department.
CHANGING THE REMOTE CONTROL'S BATTERIES
1. Open the battery compartment on the rear side of the
remote control (see Figure 7, p. 7).
2. Remove four batteries.
3. Insert four new AAA batteries and close battery
compartment.
Halogen
Bulb Connection
Halogen Bulb
Fastening Knob
Figure 8 - Replacing the Halogen Bulb.
CAUTION: Observe polarization markings on the inside
of the battery compartment and insert batteries
accordingly.
CHANGING FUSES
WARNING: Risk of electric shock. Always disconnect
the power before changing fuses.
CAUTION: Make sure the rating of the inserted fuses
complies with the power requirements listed under
Technical Specifications on p. 9.
1. Pull out the fuse compartment located on the backside of
the AP250 (see "Instrument Components, p. 3, #10).
2. Replace burnt fuses.
3. Insert the fuse holder into the fuse compartment until it
snaps in.
4. Reconnect the power cord and turn the projector on.
CHANGING THE VOLTAGE
WARNING: Risk of electric shock. Always disconnect
the power before changing fuses.
CAUTION: Make sure the rating of the inserted fuses
complies with the power requirements listed under
Technical Specifications on p. 9
1. Pull out the fuse compartment located on the backside of
the AP250 (see "Instrument Components, p. 3, #10).
2. Remove fuses.
3. Pull out white voltage indicator and rotate it so the
indicator line matches the desired line voltage.
4. Insert appropriate fuses (see p. 9, Technical Specifications,
Power Requirements).
ROUTINE CARE
The AP250 requires very little care. The exterior housing is
made from polycarbonate and can be cleaned with a mild soap
or detergent applied to a clean cloth.
The projector lens and window for remote detection can be
cleaned with a soft clean dry cloth.
To clean the remote control, wipe with a soft clean dry cloth.
Do not disassemble to clean lenses.
SCREEN CLEANING
CAUTION: The screen that came with your AP250
has an extremely high reflective characteristic. It is
very susceptible to abrasive scratches and finger
prints. Handle with care.
Copper Plate under
Fastening Knob

13800-101-Rev. A 9
Leica AP250 Automated Projector
Slide Library Projection distance 10 ft. (3 m) to 26.5 ft. ( 8 m)
Refraction distance Min. 7.4 ft. (2.3m)
Max. 30 ft. (9.2m)
Number of test charts 33 standard test charts
Masks Red/green, polarization,
single horizontal lines,
single vertical, single
letters and single
numbers
Tilt range of projector ± 150
Automatic switch-off after 30 min. without
operation
Power requirements
Line voltage 110V; 230V; margin ±10%
Line frequency 50 to 60 Hz
Line fuse on 110V 500 mA, slow blow/110V
on 230V 250 mA, slow blow/230V
Projection lamp 12V/30W Halogen bulb
Grounding wire Instrument to be
connected only to proper
outlets with correct
ground wire
Protection class 1
Degree of protection IP 21
Power consumption 40 VA
Dimensions
(Head Only)
Height 7"
Width 8"
Depth 13"
Color White with gray accents
Weight 12 lbs. (5.8 Kg)
Technical Specifications
Letter Charts
Number Charts
Illiterate Charts
Special Charts
Astigmatism Red-Green Cross Cylinder Phoria
Phoria
with fixation
Minute Stereo Fixation point Vertical
Coincidence
Worth
Horizontal Line
Vertical Line
Binocular
Balance
Eye Schematic
Children Charts
400
200
150
80
60
70
60
50
25
20
20
20
20
20
20
15
10
40
30
20
20
15
10
70
60
50
40
30
25
100
80
200
150
100
80
70
60
50
40
30
25
20
20
15
40
30
20
80
60
100
50
40
30
20