TOPCON

ACP-8 Instruction Manual Nov 2004

Instruction Manual

37 Pages

File Type: PDF

File Size: 1.21 MB

File Name: TOPCON - 4241295992 - ACP-8 Instruction Manual Nov 2004 - 2004-11.pdf

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Page 1

INSTRUCTION MANUAL

AUTO CHART PROJECTOR

ACP-8

INTRODUCTION Thank you for purchasing the TOPCON ACP-8 Auto Chart Projector. (To get the best use this instrument, please carefully read these instructions and keep this Instruction Manual in a convenient location for future reference.) This text outlines the ACP-8 Auto Chart Projector and describes basic operations, troubleshooting, checking, maintenance and cleaning. To encourage the safe, efficient use of this instrument and to prevent danger to the operator and others, we suggest you carefully read the "Displays for Safe Use" and the "Safety Cautions". Again, please keep this Instruction Manual in a convenient location for future reference.

Precautions • This machine is a precision instrument; install it in a place that is set to the following conditions: temperature (10~40°C), humidity (30~85%) and atmospheric pressure (70~106KPa). Avoid direct exposure to sunlight. • To ensure smooth operation, install the instrument on a level surface free of vibrations. Also, do not place any objects on the instrument. • Before using the instrument, connect all cables properly. • Use the specified source voltage. (±10% 50/60Hz ±1kHz) • When not in use, turn the power off and dust cover on the instrument. • To ensure a correct reading, do not soil the measuring window with finger prints, dust, etc. Also, do not touch the measuring nozzle except when cleaning.

DISPLAY FOR SAFE USE In order to encourage the safe use of this product and prevent any danger to the operator and others or damage to properties, important warnings are placed on the product and inserted in the instruction manual. We suggest that everyone understand the meaning of the following displays and icons before reading the "Safety Cautions" and text.

WARNING DISPLAY

MEANING

WARNING

Ignoring or disregarding this display may lead to death or serious injury.

CAUTION

Ignoring or disregarding this display may lead to personal injury or physical damage.

• Injury refers to cuts, bruises, sprains, fractures, burn, electric shock, etc. • Physical damage refers to extensive damage to buildings or equipment and furniture.

ICONS ICONS

MEANING This indicates Prohibition. Specific content is expressed with words or an icon either inserted in the icon itself or located next to the icon. This indicates Mandatory Action. Specific content is expressed with words or an icon either inserted in the icon itself or located next to the icon. This icon indicates Hazard Alerting (Warning). Prohibition. Specific content is expressed with words or an icon either inserted in the icon itself or located next to the icon.

SAFETY CAUTIONS WARNING Icons

Prevention item

Page

Do not break down, modify or repair the equipment. Doing so can cause electric shock. Request a repair from your dealer.

To prevent an electric shock hazard, do not allow water or other foreign matter to enter into the instrument.

To avoid fire and electric shock in the case of tumbling, do not place a cup or vessel containing water/fluid on the instrument.

To avoid electric shock, do not insert objects or metals through the vent holes or gaps or place them inside the machine body.

Connect the power plug to a three-prong properly grounded AC socket with an earth. If it is connected to a socket that is not grounded, it can cause a fire and electric shock due to leakage.

Unplug the power cable before removing the fuse cover to replace the fuse. Removing the fuse cover with the power cable plugged in can cause electric shock. Do not install the power cord on the body with the fuse cover removed.

Use only attached fuses (For 100, 120V range: T-1.6A, 250V For 220, 230, 240V range: T-1A, 250V). Using other fuses may cause a fire in the event that the instrument fails.

Should any anomaly, such as smoke, occur, immediately switch OFF the power source and unplug the power cable. Continued use while ignoring the condition may cause a fire. Contact your dealer for repair.

CAUTION Icons

Prevention item

Page

Do not tilt the device or place it in an unstable place. Otherwise, the device may topple over, drop or cause injury.

Handling the power plug with wet hands can cause electric shock.

To avoid electric shock, unplug the power cable when replacing the projection lamp.

Do not replace the projection lamp immediately after turning off the light. Otherwise, you might get burnt by the hot temperature of the lamp.

When this instrument is not used for a long time, remove the batteries from the remote controller.

This instrument has been tested (with 120V/230V) and found to comply with IEC60601-1-2: 1993. This instrument radiates radio frequency energy within standard and may affect other devices in vicinity. If you have found out by turning on/off the instrument that it affects other devices, it is recommended to change the direction, keep a proper distance against other devices or change the outlet. If you have a question, consult with the selling agent.

USAGE AND MAINTENANCE PURPOSE This Auto Chart Projector "ACP-8" is a precision electrical device for medical use that must be used under the instruction of a doctor.

FUNCTION AND INTENDED APPLICATION This product is designed to project the eye test chart for visual acuity examination to the screen. In order to control the eye test chart, controller is available.

USER MAINTENANCE To maintain the safety and performance of the equipment, never attempt to do maintenance on your own. Ask our service personnel for repairs except for the items specified here which can be maintained by the user. For details, follow the instructions.

FUSE REPLACEMENT The primary fuses for the main body may be replaced by a non-trained service technician. For details, refer to "Replacing the Fuse" on page 25.

LAMP REPLACEMENT The projection lamp can be replaced. Refer to the instructions in "Replacing the Projection Lamp" on page 23 for details.

ESCAPE CLAUSE • TOPCON shall not take any responsibility for damage due to fire, earthquakes, actions by a third party or other accidents, or the negligence and misuse of the user and use under unusual conditions. • TOPCON shall not take any responsibility for damage derived from the inability to use this equipment, such as a loss of business profit and suspension of business. • TOPCON shall not take any responsibility for damage caused by operations other than those described in this Instruction Manual. • Diagnoses shall be made on the responsibility of pertaining doctors and TOPCON shall not take any responsibility for the results of such diagnoses.

WARNING INDICATIONS AND POSITIONS To ensure the safe usage of this equipment, precaution indications are provided. Abide by the following warning instructions. If any of the following labels are missing, please contact us at the address printed on the back cover of this manual.

Inner of lamp cover

See P.25

CONTENT INTRODUCTION ... 1 DISPLAY FOR SAFE USE ... 2 SAFETY CAUTIONS ... 3 USAGE AND MAINTENANCE ... 5 ESCAPE CLAUSE ... 5 WARNING INDICATIONS AND POSITIONS ... 6

Names of parts Names of parts on the main body ... 8 Remote controller ... 9 Standard accessories ... 10

Operation procedures Preparations ... 11

Usage guide Operating the random access controller ... 15 Using the program functions ... 16 Using charts for measuring binocular visual functions ... 18

Troubleshooting Operating procedures for troubleshooting ... 20

Chart ... 21

Care and check Daily Maintenance ... 23 Changing the channel setting of the remote controller ... 26 Maintenance ... 28

Reference Optional Accessories ... 29 Specifications ... 29

Names of parts Names of parts on the main body Top cover Sensor

Lamp cover

Front panel

Barrel screw

Base (Some types do not have it in the standard kit.)

Power switch

RS232C connector (only MC type) Power socket

Fuse holder Voltage selector Power plug

8 Names of parts

Remote controller E type

EM type

1 Light emitter 2 Chart switch 3 Light switch 4 Reset switch (*) 5 Forward switch (*) 6 Back switch (*) 7 Mask selector 8 Mask transfer switch 9 R&G switch 10 Program switch * These switches are used when activating the 'program' mode.

(Example : A type chart)

9 Names of parts

Standard accessories The following are the standard accessories. Please check if they are all included.( ) refers to the number of items. Power cord (1)

Calibration card (1)

Silicone cloth (1)

Attachment screws (2) Not included in the types without base.

Dust cover (1)

Spare fuse (2)

Spare lamp (1)

Dry battery (UM-3) (2)

Hexagonal wrench for focus adjustment (2)

Screen (1)

Instruction manual (1)

10 Names of parts

Operation procedures Preparations

Caution

Do not tilt the device or place it in an unstable place. Otherwise, the device may topple over, drop or cause injury.

Warning

Connect the power plug to a three-prong properly grounded AC socket with an earth. If it is connected to a socket that is not grounded, it can cause a fire and electric shock due to leakage.

Caution

Handling the power plug with wet hands can cause electric shock.

Caution

When this instrument is not used for a long time, remove the batteries from the remote controller.

Place the instrument at the same level as the person to be measured. When installing by using the base, insert the shaft of the instrument into the base as illustrated. (This method is same when using the stand or wall mount.)

Base (Some types do not have it in the standard kit.)

2 3 * *

Turn the power switch 'off'. When more than two instruments are installed in close proximity to each other, it is necessary to set the channel by the DIP switches of the body and the signal channel switches of the remote controller in order to avoid interference.(Up to four instruments may be installed at the same location) At the time of shipment, the instrument is set at channel 1. To change the channel, see "Changing the channel setting of the remote controller" on page 26.

11 Operation procedures

Insert the connector of the power cord into the power socket on the body and insert the power supply plug into the outlet.

5 6 7

Turn the power switch 'on'. Remove the battery cover from the back of the remote controller. Insert the dry batteries into the remote controller as illustrated and replace the battery cover. (How to insert batteries)

Adjust the position of the body so that the projected light is centered on the screen.

12 Operation procedures

For E, EM, MC type

Loosen the barrel screw about a half of a turn with the attached hexagonal wrench.

Barrel screw

Knob

Move the knob in the arrow direction so that the projection on the screen is sharp and clear. For proper calibration, the projection of the chart which has 0.1 (or 20/ 200) visual acuity should contact the inner side of one of the scales on the calibration card which correspondis to the desired refracting distance.

If the size does not match the respective refracting distance scale, move the instrument either toward or away item the screen and then repeat items 9 above.

Fix the barrel screw to complete preparation.

13 Operation procedures

For R type (variable focus lens type)

Loosen the first lens-barrel screw and the second lens-barrel screw about a half of a turn. Move the lens-barrel screw in the arrow direction with the hexagonal wrench inserted. The first lens-barrel screw: size The second lens-barrel screw: focus Move the first lens-barrel screw to roughly fit the size and move the second lensbarrel screw to achieve the focus.

Move the first and second lens-barrel screw forward and/or backward to focus 20/200 (or 0.1) visual acuity "E" on to the projection screen. Place the calibration card on the projection screen. The "E" of the 20/200 slide should fill and just touch the inner sides of the scale which corresponds to the desired refracting distance.

* The variable focus lenses permits the R type to be positioned at the following projection distances relative to refracing distance: Refracting Distance

Projection Distance

2.90 to 3.70m

3.80 to 4.80m

4.70 to 5.90m

6.1m

5.70 to 7.10m

For example: At a refracting distance of 5 meters, the R type Auto Chart Projector can be positioned at a distance of 4.70 to 5.90 meters. Within this range, the variable focus objective lenses can project the properly calibrated image.

Fix the barrel screw to complete preparation.

14 Operation procedures

Usage guide Operating the random access controller

Turn the power switch on. The chart will be reset to the start position and the lamp will light up.

Direct the light emitter on the remote controller to the sensor on the projector body or use a wall with high reflectivity to receive the reflected light (1) on the light emitter and press each switch before using. • Switch functions (1) Chart switch... Projects the chart as indicated on the switch. (2) Light switch... Turns the lamp on/off. (4) (3) Reset switch... Returns to the step 1 (5) (3) chart in the program. (2) (4) Forward switch... Automatically advances (6) (7) the step in the program. (5) Back switch... Automatically backs the (9) (8) step in the program. (6) Mask selector... Allows selection of a mask that is appropriate for the chart. (horizontal mask, vertical mask, one character mask). (7) Mask transfer switch... Moves the mask in the direction as indicated on the switch. When the mask Example: A type chart moves to the maximum (minimum) indication of a chart being projected, the next (previous) chart in the sequence will automatically appear. Charts can be switched within the same type of charts. (8) R&G filter switch... R&G filter can be applied only for the chart that allows R&G filtering. (9) Switch the program P1 with the program P2. * See P.16 for using the program function. * When the lamp is turned off, the lamp will light up by pressing either the (1) or (3)-(9) switches. * When the mask is not open, it will automatically be open by pressing the (1) chart switch. * When the instrument is not used for 10 minutes, it will be automatically turned off (Auto shut-off mechanism)

15 Usage guide

Using the program functions

How to program the measuring procedure

(1) To start programming Turn the power switch on while pressing the reset switch. Release the reset switch when the buzzer sounds once. The chart will return to the start position, the lamp lights up and the buzzer sounds twice. Select either program 1 or 2 by pressing P1 or P2. (Buzzer once: P1 initial value, buzzer twice: P2). Press the “^” switch. The buzzer sounds three times. (2) Programming the charts Press the chart switch or the mask switch according to the measuring procedure to project and press the “^” switch. The buzzer sounds four times and this completes one step. * Repeat this to program the procedure. Programming is available for up to 30 steps. (3) Completing the programming Press the reset switch. This completes the programming. * Programming 30 steps will automatically complete the function without pressing the reset switch. * Turning the power switch off won’t erase the program. * Follow the steps above to start a new program. The former program will be erased to start a new program.

16 Usage guide

Carrying out program-base examinations (Example : A type chart) • Turn the power switch on.

• The chart at the start position will be projected.

• Step 1 chart will be called up.

• Step 1 chart will be projected.

• You can reset to the beginning (step 1) of the programbased examination during an examination.

• Any desired chart can be projected during the course of a program-based examination.

• Pressing the program up and down switches can back up the program at any time. The program can be backed up as many steps as necessary.

• The chart of the last step will be projected.

• The instrument will return to the first (step 1) chart in the program-based examination.

17 Usage guide

Using charts for measuring binocular visual functions Polarized R and G test Binocular balance test

Worth four dot test

Cross ring test

Chart

A, C, F type Filter Purpose

A, B, *F, *H type

C type

A, C, F, H type

B type

Polarizing filters

Red filter for the right eye and Red filter for the right eye and green filter for the left eye green filter for the left eye

Test of binocular refraction and accommodation balance

Test of the final binocular refraction balance

Test of the function of binocular fusion

Test of the presence and level of latent heterophoria

The right eye is over corrected and the left eye is under corrected.

There is a variance of degree between the right eye and the left eye.

In the case where 4 dots are seen, there will be normal fusion. The white (bottom) color indicates which eye can see better. If red is seen mixed with green, the right and left eyes function at the same level.

Indicates exophoria of 3 prisms.

Right eye

The left eye is over corrected and the right eye is under corrected.

How the charts are seen binocularly

How the charts are viewed

Left eye

Adjust the spherical power to provide binocular balance.

Indicates esophoria of 2 prisms. If only two targets are seen, the left eye is suppressed.

The binocular refraction and accommodation balance are achieved when the two reds or two greens are seen at the same intensity.

18 Usage guide

*The Characters used in the F and H types are not the same as those shown above.

If only three green targets are seen, the right eye is suppressed

If five targets are seen, it indicates that the patient has diplopia.

Indicates left eye hyperphoria of 1 prisms.

Indicates left hypophoria of 0.5 prisms.

Polarized crosshair test

A, B, C, F, H type

Reticle heterophobia test with a fixation target

A, F, H type

Coincidence test

A, B, C, F, H type

Coincidence test

A, C, F type

Stereo test

A, B, C, F, H type

Polarizing filters

Test of the accommodation balance and heterophobia

Heterephobia which can not be examined by the reticle testing is tested.

Test of aniseikonia and vertical heterephobia which can not be examined by polarized crosshair test.

Test the presence of stereoscopy.

Esophoria

The right eye has an infixation disparity.

Aniseikonia of about 7% (equivalent to two lines) A single line indicates about 3.5%.

Exophoria

Indicates that the right eye has an infrafixation disparity.

Vertical heterophoria

If either line is seen thinner, the eye in question is suppressed.

Two lines are seen in fusion to form a single line image and floated or sunk against the central circle. The binoculra parallaxes is about 13 minutes and the lower line is seen floating about 1.1m (when seen at a distance of 5m with a PD of 64mm) If the axis of the polarizing filter is reversed at the same time for both eyes and seen sunk about 2.1m, it is normal. If the images are slowly fused, there is still correctable heterophoria. Verify with another heterophoria test. If it takes some time until the image appears to float, the patient may have an exophoria. If it takes some time until the image sinks, the patient may have an esophoria.

Left eye hyperphoria Indicates that the right eye has an suprafixation disparity.

Left eye hypophoria Left eye hypophoria

If either line is seen thinner, the eye in question is suppressed.

If either is clearly visible, there is observed suppression with the periphery of the retina in question.

19 Usage guide

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