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LENSMETER

ModelLM-770

OPERATORS MANUAL

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NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan

(Manufacturer) Telephone: (0533) 67-6611

Facsimile: (0533) 67-6610

NIDEK CO., LTD : 6th Floor, Takahashi Bldg., No.2, 3-chome, Kanda-jinboucho

(Tokyo Office) Chiyoda-ku, Tokyo 101-0051, Japan

Telephone: (03) 3288-0571

Facsimile: (03) 3288-0570

Telex: 2226647 NIDEK J

NIDEK INCORPORATED : 47651 Westinghouse Drive, Fremont, California 94539, U. S. A.

(United States Agent) Telephone: (510) 226-5700Facsimile: (510) 226-5750

NIDEK SOCIETE ANONYME : Europarc 13, rue Auguste Perret, 94042 CRETEIL, France

(Authorized Representative) Telephone: (01) 49 80 97 97

Facsimile: (01) 49 80 32 08

June 200630283-P902E

Printed in JAPAN

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BEFORE USE, READ THIS MANUAL.

This manual contains information necessary for correct and effective operation of NIDEK

Projection and Digital type Lensmeter Model LM-770, and provides procedures for

operation, cautions, specification, and procedures for maintenance.

In this manual, IEC 60601 is applied.

The lensmeter complies with ISO 8598 (Optics and optical instruments - Focimeters).

For correct use, it is necessary that this manual, in particular the operating procedures,

be thoroughly understood before using this instrument.

Keep the manual handy to verify use.

There are no user-serviceable parts inside the instrument except lamps, fuses, printer

papers and ink cartridge. If you find any problem or question about the instrument

during the operation, please contact your authorized distributor.

The LM-770 is calibrated with reference wavelength of 587.56 nm.

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Table of Contents

1 INTRODUCTION ........................................................................................................ 1-11.1 Outline ...................................................................................................................... 1-1

1.2 Indications for Use ................................................................................................... 1-1

1.3 Classifications ........................................................................................................... 1-1

1.4 Symbol Information .................................................................................................. 1-2

2 SAFETY ........................................................................................................................ 2-12.1 Operation ..................................................................................................................2-1

2.2 Storage ..................................................................................................................... 2-2

2.3 Transference ............................................................................................................. 2-2

2.4 Installation ................................................................................................................ 2-2

2.5 Wiring ....................................................................................................................... 2-3

2.6 After Use .................................................................................................................. 2-4

2.7 Maintenance and Checks .......................................................................................... 2-4

2.8 Disposal .................................................................................................................... 2-4

2.9 Labels ....................................................................................................................... 2-5

3

CONFIGURATIONS ................................................................................................... 3-1

4OPERATING PROCEDURES.................................................................................... 4-14.1 Basic Process of Operation (SPH, CYL Lenses) ...................................................... 4-1

4.2 Prior Measurement ................................................................................................... 4-4

4.2.1 Preparation ...................................................................................................... 4-4

4.2.2 How to set the lens .......................................................................................... 4-4

4.3 Measurement ............................................................................................................ 4-5

4.3.1 Measurement of single vision lens ................................................................... 4-5

4.3.2 Measurement of ADD diopter ......................................................................... 4-6

4.3.3 Measurement of prism refractive power .......................................................... 4-7

4.3.4 Measurement of hard contact lens ................................................................... 4-9

4.4 Marking Axis .......................................................................................................... 4-10

4.4.1 Making sphere lens ........................................................................................ 4-10

4.4.2 Marking cylinder axis .................................................................................... 4-10

4.4.3 Marking phoria lens....................................................................................... 4-11

4.5 Memory Function ................................................................................................... 4-12

4.5.1 How to memorize .......................................................................................... 4-12

4.5.2 How to display the contents of memory........................................................ 4-12

4.5.3 How to clear the memory .............................................................................. 4-13

4.6 Print out .................................................................................................................. 4-134.7 Setting Step and Changing the Setting of CYL Reading ........................................ 4-14

4.7.1 How to set the step ....................................................................................... 4-14

4.7.2 How to set CYL reading ............................................................................... 4-14

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4.8 Auto-off Function ................................................................................................... 4-15

5 MAINTENANCE ......................................................................................................... 5-15.1 Replace the Lamp ..................................................................................................... 5-1

5.2 Replace the Fuses ..................................................................................................... 5-2

5.3 Replace the Ink Cartridge ......................................................................................... 5-3

5.4 Replace the Printer Paper ......................................................................................... 5-4

5.5 Cleaning of Protective Glass ..................................................................................... 5-4

5.6 Cleaning Exterior ...................................................................................................... 5-5

6SPECIFICATIONS ...................................................................................................... 6-1

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1INTRODUCTION

1.1 Outline

NIDEK MODEL LM-770 is a projection and digital type lensmeter which is developed for moreusers to use the product of high performance.

This instrument projects the target brightly and sharply on the screen.

Also, easy and accurate lens measurement is possible. The measurement results are shown in the data

of sphere power, cylinder power, axis angle, addition (ADD) power and prism power.

The features is

Measured refractive powers and axis are displayed digitally and easy to read.

By the equipment of big screen, bright and sharp target can be obtained.

Maximum measurable lens diameter is up to 100mm.

Auto-off function gives longer life time of the lamp and save energy of electricity.

Measured refractive powers and axis can be printed out. Measured value of left and right lenses in frame can be put in memory and also can be printed

out.

1.2 Indications for Use

This equipment is designed to measure vertex powers and prismatic effects of spectacle and contact

lens, to orientate and mark uncut lenses, and to verify the correct mounting of lenses in spectacles

frames.

1.3 Classifications

[Classification under the provision of 93/42/EEC(MDD)] Class I

The LM-770 is classified into Class I device.

[Form of protection against electric shock] Class I

The LM-770 is classified as a Class I equipment.

The class I equipment is an equipment in which the protection against electric shock does not rely

on basic insulation only, but which includes an additional safety precaution that provides for a

connection of accessible conductive parts to the protective (earth) conductor in the fixed wiring of

the installation. Therefore, accessible conductive parts cannot become activated in the event of

failure in the basic insulation.

[Degree of protection against electric shock] Type B Applied Part

The LM-770 is provided with a Type B Applied Part.

The Type B Applied Part provides an adequate degree of protection against electrical shock,

particularly regarding the following:

- allowable leakage currents

- reliability of the protective earth ground connection (If applicable).

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[Degree of protection against liquid entry] IP20

The LM-770 is classified as a ordinary equipment (IP20), which is provided with an enclosure not

completely water proof.

Avoid water splash on the equipment.

[Method(s) of sterilization or disinfection recommended by the manufacturer]

The LM-770 does not have any part to be sterilized or be disinfected.

[Degree of protection against flammability]

The LM-770 is classified as an equipment not suitable to be used in a potentially flammable

environment.

Do not use near flammable materials.

[Operation mode]

The LM-770 is classified as an equipment which operates continuously.

1.4 Symbol Information

This symbol on the body indicates that caution should be taken. Refer to the operators

manual before use.

This symbol indicates that the degree of protection against electrical shock of the applied

part is classified as a Type B applied part.

This symbol on the power switch indicates that the power is ON.

This symbol on the power switch indicates that the power is OFF.

This symbol means the fuse rating.

This symbol indicates the input.

This symbol indicates the output.

This symbol indicates that the alternating current should be applied to the instrument.

This symbol indicates the date of manufacture.

This symbol indicates that this product shall be disposed of in a separate collection of electrical

and electronic equipment in EU.

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2SAFETY

In this manual, a Signal Word is used to designate a degree or level of safety alerting,

whose definitions are as follows.

CAUTION: Indicates a potentially hazardous situation which, if not avoided,

may result in minor or moderate injury or property damage.

Even the cases mentioned in CAUTIONmay result in serious injury under a certain

situation. Be sure to observe the instructions of CAUTION.

2.1 Operation

CAUTION

Never disassemble or touch the inside of the instrument.

This may result in an electric shock or instrument malfunction.

Do not touch the lamp house cover since it is hot while a lamp is illuminated.

If not, you may get burned.

Never yank the power cord to disconnect from wall outlet but hold the plug whiledisconnecting.

This can weaken the metal core of the cord and may result in a short circuit or an

electric shock.

Do not place the instrument on the power cord.

The sheath of the cord becomes ragged and may cause an electric shock or a short

circuit.

If the metal core of the power cord is exposed, power turns on and off by shaking the

cord, or cord/plug gets so heated that one cannot hold it, it means that the cord is damaged.Immediately replace the cord.

This may cause an electric shock or a fire.

Do not use the instrument for other than the intended purpose.

NIDEK will not be responsible for accidents or malfunction caused by carelessness.

In the event of a malfunction, do not touch the inside of the instrument, but unplug the

power cord and contact your authorized distributor.

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NOTE

Before measurement, be sure that the nosepiece is mounted correctly.

Incorrect mount of the nosepiece may on accuracy of measurement.

2.2 Storage

NOTE

Do not store the instrument in a place where it may get wet or where poisonous gas or

liquid is stored.

Avoid storing the instrument in an area with excessive heat, humidity, or dust.

To preserve the appearance or internal parts of the instrument, avoid direct exposure to

sunlight.

2.3 Transference

CAUTION

Never trail the power cable during the transference.The instrument may fall down and cable may break when it is stepped on or pulled.

In transference, hold the instrument surely with both hands, and take care not to bump

onto other instruments, walls and others.

Careless transference may cause injury or malfunction.

2.4 Installation

CAUTION

Do not install the instrument near water.

If water gets into the internal structure, there is the possibility of electrical shock or

instrument malfunction.

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CAUTION

Install the instrument in a stable and level place where vibration or shock does not occur.

The instrument may not perform observation correctly or may malfunction.

Also, if the instrument is tripped over because of any accidental shock, it

may result in possible injury.

NOTE

Install the instrument in the following conditions.

A low dust environment

A low light interference environment

A vibration and shock free environment

Install the instrument in the environment whose condition can be set to the following.

Use the instrument under the following temperature and humidity.

Use environment Temperature : +10 to +40 C

Humidity : 30 to 85% (non-condensing)

2.5 Wiring

CAUTION

Be sure to use the wall outlet which meets the requirements of power specification.

If the line voltage is too high or too low, the instrument may not give full performance.

Malfunction or a fire also may occur.

Be sure to use a power outlet equipped with a grounding terminal.

Otherwise, this may cause electric shock when it breaks or power leaks.

Be sure to securely plug in the power cord.Insecure connections may cause a fire.

Be sure to securely plug in the interface cable.

Insecure connections may cause malfunction.

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2.6 After Use

CAUTION If the instrument is not be used for a long time, disconnect the power cord from the wall outlet.

This may cause a fire.

NOTE

If the instrument will not be used during an extended period of time, turn off the main

switch and put the dust cover over the instrument.

If not, settled dusts may impair visibility through the instrument.

2.7 Maintenance and Checks

CAUTION

As the illumination lamp can get quite hot, replace it when it is cool.

If not, you may get burned.

NOTE

Disassembling for service is not permitted except at NIDEK or authorized distributor.

Never use an organic solvent such as paint thinner to wipe the exterior.

This may ruin the surface.

2.8 Disposal

NOTE

Follow local governing ordinances and recycling plans regarding disposal or recycling of

device components.

When disposing packing materials, sort them by the materials and follow local governing

ordinances and recycling plans.

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2.9 Labels

The following labels provide safety information about each part.

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3CONFIGURATIONS

Screen

Digital display

Sign changeover switch +/-

S/C measuring changeover switch

ADD diopter switch

Right switch

Left switch

Print switch

Lens Table

Nosepiece

Prism compensator

Target rotating ring

Diameter measuring scale

Target

Indicator

Corona target

Cross line target

[Fig.2 Screen & Digital display]

[Fig.1 Front view]

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Screen

It is graduated with 1 prism diopter step con-

centric circle scale and 5 step angle scale.(Refer Fig.2)

Target

It is consisted from corona and cross lines tar-

gets. (Refer Fig.2)

Digital display

Measured values of SPH (sphere), CYL (cyl-

inder), ADD and AXIS are displayed on thispart. (Refer Fig.2)

Indicator

In case measuring cylinder lens, it displays to

which side of cross lines target is focused.

(Refer Fig.2)

According to this indicator, measure the lens

by focusing either short or long cross lines tar-

get.

Prism compensator

In case measuring lens with over 5 prism di-

opter, this prism compensator is used not to

go off the target from the field of view of

screen.

By moving the prism compensator knob for

left or right, direction of moving target is

changed and by rotating the knob, moving vol-

ume is also changed.

Lens table

When measuring lenses in frame, touch the top

part of frame to the lens table.

Nosepiece

This is a basic point of measurement, there-

fore special plastic material is used not to give

any scratches on lens, nor to be distorted.When measuring contact lens, replace this for

nosepiece of contact lens.

Target rotating ring

By rotating this ring, angle of target can be

changed.

Diameter measuring scale

By touching lens edge to the lens table, diam-

eter of lens can be read.

Sign changeover switch +/-

This is used when opposite cylinder value is

desired to be read against the display of mea-

sured values.By pressing this switch again, it returns to

original display.

S/C measuring changeover switch

Each pressing this switch change the SPH or

CYL measuring mode. Also returning to SPH

measuring mode from ADD measuring mode

or memory display mode, can be made by this

switch.

ADD measuring switch

By pressing this switch, it makes ADD measur-

ing mode. In this mode, CYL display at digital

display part is changed to ADD display.

Right switch

Left switchThese switches are used to memorize the left

and right measured values in the framed lens.

Also after memory, it returns to SPH measur-

ing mode.

Print switch

By pressing this switch, measured values which

are displayed at digital display part, are printed

out and returns to SPH measuring mode.

In case measured values are in the memory,

contents of memory are printed out and

memory is erased. This works also as feeding

printer paper by continuous pressing.

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Lens Table Lever

Printer cover

Exterior interface connector

Lamp adjusting screws

Power source connector

Main switch

Diopter handle

Axis marking lever

Lens holder lever

Lens holder

Ink cartridge

[Fig.3 Side view]

[Fig.4 Rear view]

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Axis marking lever

This is used for marking axis on the lens.

Lens holder lever

In the state no holding lens, raise this lever a

little to release the click and down the lens

holder to hold the lens. After measurement of

the lens, the lever is raised up until it get click

sound and fixed at upper part.

Lens holder

To avoid giving scratches on the lens, plasticsare provided at the tips of lens holder. After

setting the lens, some movement can be made.

Ink cartridge

Lens table lever

Lens table moves back and forth by this lever.

Diopter handle

Main switch

Exterior interface connector

Accessory equipment connected to the ana-

log and digital interfaces must be certified ac-

cording to the representative appropriate na-

tional standards (for example, IEC 60601-1.)

Further more all configurations shall comply

with the system standard IEC 60601-1-1. Ev-

erybody who connects additional equipment

to the signal input part or signal output part

configured a medical system, and is therefore

responsible that the system complies with the

requirements of the system standard IEC

60601-1-1. If in doubt, consult the technical

service department or your local representa-

tive.

Lamp adjusting screws

After replacing lamp, if part of target becomes

dark or target blurs along with flowing whenin defocus, there screws are used.

Power source connector

Both fuse holders and voltage selector are pro-

vided.

Printer cover

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4OPERATING PROCEDURES

4.1 Basic Process of Operation (SPH, CYL Lenses)

NOTE Before measurement, be sure that the nosepiece is mounted correctly.

Incorrect mount of the nosepiece may on sccuracy of measurement.

1. Put the main switch ON by pressing marked side. When focusing target, confirm

that SPH value is 0.00. Also confirm that target is in the center of screen.

2. Put the lens, facing its concave side on the nosepiece.

3. Raise the lens holder lever at upper end

once and then down it to hold the lens. (See

Fig.5)

4. Turn the diopter handle to make corona

target on the screen in sharp focus.

5. Move the lens to coincide the center target

to the screen center.

* If the corona target flows, proceed to 8.

Fig.5

Fig.6

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6. Make fine adjustment by the diopter handle

to get sharp focus of the target.

* SPH value is displayed at digital displayedpart. (Refer Fig.7)

7. Press down the axis marking lever to print

the marks.

* Center point shows the optical center.

* Proceed to 16.

8. Turn the target rotating ring and align

the short cross lines target in parallel to

corona flow lines. (Refer Fig.8)

9. Turn the diopter handle and make the

short cross lines target in sharp focus.

10. Press the S/C measuring changeover switch

, it changes to CYL measuring mode with

beep sound.

* Display of indicator changes to .

(Refer Fig.9)

Fig.9

Fig.8

Fig.7

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11. Turn the diopter handle and make the

long cross lines target in sharp focus. (Refer

Fig.10)

* If indicator flickers, rotate either the target

or line for 90 and return to the SPH

measuring mode by pressing S/C measuring

changeover switch.

Then proceed over again from the process 5.

However in case not mark axis, flickering

indicator has nothing to do with.

* SPH, CYL and AXIS are displayed on the

digital display . (Refer Fig.10)

12. Turn the target rotating ring and coincide

the axis value displayed on digital part to the

prescription value.

13. Turn the lens and coincide its focus to the

long cross line target. (Refer Fig.11)

14. Coincide the lens center to the target and

mark the axis by pressing down the axis

marking lever.

15. Press the S/C measuring changeover switch

, it returns to SPH measuring mode with

beep sound. (Refer Fig.12)

16. Hold the lens by hand and raise the lens

holder lever up until it gets click sound.

17. Remove the lens.

Fig.12

Fig.11

Fig.10

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4.2 Prior Measurement

4.2.1 Preparation

1. Power source cord is firstly connected to LM-770 and then to the socket.

2. Confirm that scale of prism refractive power

on the prism compensator show 0. (Refer

Fig.13)

4.2.2 How to set the lens

In case measuring lenses in frame, touch the top part of frame to the lens table and hold it by lens

holder.

Lens table comes out by pulling the lens table lever this side.

Scale of prism refractive power

Fig.13

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4.3 Measurement

4.3.1 Measurement of single vision lens

1. Confirm that indicator shows the short lines mark ( ) and turn the diopter handle to get

sharp focus to the short cross lines target.

If indicator shows long lines mark ( ), change it by S/C measuring changeover switch.

Coincide center of the lens, and read SPH value on the digital display when the target is in the

sharp focus. In case sphere lens, whole target get sharp focus. Then measuring is now finished.

2. If the lens astigmatism, corona target flows in a cylinder. Align the short cross lines target

in parallel to the direction of flowed lines and make it in sharp focus.

Then change it to CYL measuring mode by S/C measuring changeover switch. Indicator displays

long lines mark and turn the diopter handle to make the long cross lines target in sharp focus.

Now read the values of SPH, CYL and AXIS on the digital display. Further reading of +/- of

measured CYL value can be changed by sign changeover switch.

NOTE While in measuring astigmatism lens, indicator may flicker. But if axis marking is not

made, this has nothing to do with.

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4.3.2 Measurement of ADD diopter

When measuring bifocal lens, this is used to see how much refractive power for near vision isadded on the refractive power for far vision.

After measuring far vision of refractive power, input refractive power of far vision by pressing

ADD measuring switch and the difference is displayed by the standard basing on it.

[Process]

1. Measure the far vision part of the lens in the process stated in 4.3.1.

2. Press the ADD measuring switch.

* Lamp at ADD on digital display part is lit

and it becomes ADD measuring mode.

(Refer Fig.14)

3. Shift the lens to come its near vision part

(small lens) on the nosepiece. (See Fig.15)

NOTE

When shift the lens, raise the lens holder

lever a little up.

4. Focus the cross lines target to the side shown by indicator

NOTE

If the target dose not come to the center of screen due to the effect of prism of the lens,

use the prism compensator and bring the target to the center of screen to enable getting

better sharp focus.

* On the digital display, SPH values for vision and ADD are displayed.

Fig.15

Fig.14

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4.3.3 Measurement of prism refractive power

Measuring of prism refractive is divided in three ranges.

a. Within 5 prism diopter which can be read on the scale of screen.

b. Range from 5 prism diopter to 15 prism diopter.

c. Range from 15 prism diopter to 20 prism diopter. For the case of b. and c., use the

prismcompensator.

When measuring prism refractive power in framed lenses, let the patient wear the glass and mark

the each center of pupil. Then put the lens on the nosepiece to come the mark on the center ofnosepiece.

a. In case range within 5 prism diopter.

[Process]

1. Turn the diopter handle and make focusing

of the target.

2. Read the volume of shift and direction of the

target center from the center of screen.

Shifted volume in the scale of concentric circles

is the prism refractive power and direction read

on the angle scale is the direction of prism base.

* If you turn the target rotation ring to go the

center line of long cross lines target through

the center of screen, then it makes easy

reading of the angle scale. (Refer Fig.16) 3Base 200

Fig.16

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b. In case range within 15 prism diopter.

[Process]

1. Turn the diopter handle and display the expected SPH value on the digital display.

2. Operate the knob of prism compensator and bring the center of target to the center of

screen.

NOTE

If the target is not in the screen, set the angle scale of prism compensator at 0 or 90

and turn the prism compensator knob. It makes easy finding the target.

3. Turn the diopter handle to focus the target.

4. Operate the prism compensator knob and

coincide the center of target accurately to the

center of screen.

5. By the prism refractive power scale and angle

scale of prism compensator, read each prism

refractive power and direction of prism base.

(Refer Fig.17)

NOTE

If the scale of prism refractive power is

indicated in orange color, direction of

prism base is the value of angle scale plus

180.

3Base 70Fig.17

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c. In case range over 15 prism diopter.

[Process]

1. Turn the diopter handle and display theexpected SPH value on the digital display.

2. Coincide the scale of prism refractive power

of prism compensator at 15 prism diopter

and move the knob for left or right, target

crosses in the screen. (See Fig.18)

3. Stop the movement of target when its center

comes to the nearest position to the screen

center and read the prism refractive power

by the scale of concentric circle as stated a.

4. On this read value, 15 prism diopter of the prism compensator must be added. This total

value is the prism refractive power of the measuring lens.

5. Direction of prism base is read at the angle scale of prism compensator as explained at

b.

d. In case measuring astigmatism lens with prism.

Measure both cylinder and prism refractive prism.

NOTE

By using prism compensator and bring the target in the center of screen. Then

measurement can be made easily.

4.3.4 Measurement of hard contact lensMeasurement of hard contact lens can not be made by using normal nosepiece. Please change it

for nosepiece exclusive for contact lens.

Fig.18

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4.4 Marking Axis

This is used show the center of optical axis (by the center of 3 points marks) and also to showdirection of axis and base for cylinder lens etc.

4.4.1 Making sphere lens

1. Focus the target and adjust lens position to coincide the target center to the screen center.

2. Press down the axis marking lever and print 3 point on the lens in parallel for lens table.

4.4.2 Marking cylinder axis

1. According to the 4.1 Basic process of operation, measure the lens. In this moment, if the

indicator flickers, rotate the lens or target 90 and return to SPH measuring mode. Repeat

measuring again from process 5.

2. Turn the target and coincide the axis which displayed on digital display, to the angle of

axis marking.

* In case marking on cylinder axis, coincide to 0 and in case marking on prescribed value,coincide to the prescribed value.

3. Turn the lens to focus for the long cross line target.

4. Make centering lens and press down the axis marking lever to print axis.

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4.4.3 Marking phoria lens

1. Shift the target center for the direction of prism refractive power (base direction +180)by prism compensator.

2. Set the lens.

3. Make axis marking in the process of 4.4.1 or 4.4.2.

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4.5 Memory Function

This is the function to memorize the measured values of left and right lenses in the frame anddisplay these data separately or print these data out continuously.

Also in order to transmit the data to exterior system ophthalmic instrument, only memorized data

can be transmitted. Therefore such data must be memorized in advance.

4.5.1 How to memorize

Measure the lens after confirming the LED of right/left switches are OFF. After taking

measurement, by pushing the said switches, measured data can be memorized. Also when measuredvalue are memorized, LED is lit.

* When measured value are memorized, it returns to SPH measuring mode.

* Memory is one each for left and right.

4.5.2 How to display the contents of memory

While in SPH measuring mode, by pressing LED lit switch RIGHT/LEFT, memorized contentsare displayed. (Memory display mode)

When you want to read out the result of ADD measurement, press further ADD measuring switch.

Also in the case memory display mode, indicator is OFF and displayed side LED of the switch

is flickered.

NOTE

Memory display function is only effective when it is in SPH measuring mode. In other

modes, If you press the memorized switch again, contents is changed.

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4.5.3 How to clear the memory

When memory is displayed, if you press the switch again, the contents of displayed memory canbe erased.

Also, if you press the print switch, memorized contents of both right and left can be erased.

(In case including a printer, memorized contents are erased after the contents are printed out.)

In case measurement is made newly, memorized data should be erased in advance and then measure.

4.6 Print out

By pressing PRINT switch, measured data displayed on the digital display part are printed out.

Also in case measured value are memorized by RIGHT/LEFT switches, by pressing PRINT

switch memorized contents are printed out, and memorized contents are erased.

Further, when printing is out, it returns to SPH measuring mode from CYL measuring mode, or

ADD measuring mode, or memory display mode.

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4.7 Setting Step and Changing the Setting of CYL

Reading

4.7.1 How to set the step

Displayed step of refractive power can be changed by the following process.

1. Open the printer cover.

2. Refer Fig.19, put the DIP switch of No.3

ON makes 0.12D step and put it OFF

makes 0.25D step.

NOTE

Do not touch other DIP switches.

3. Once put the power source switch OFF or

press CYL measuring switch.

4.7.2 How to set CYL reading

Setting of CYL readings (Plus reading, Minus reading and Mix reading) can be made by the

following process.


2. Refer Fig.20 about DIP switches, CYL

reading can be set by changing DIP switchposition as bellows.

NOTE

Do not touch other DIP switches.

1-WS 2-WS

gnidaeR- NO FFO

gnidaeR+ FFO NO

gnidaeRxiM NO NO

Fig.20

Fig.19

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4.8 Auto-off Function

Auto-off function works when the lensmeter isnot used about three minutes. To return, press

one of any switches or rotate either diopter

handle or target rotating ring. (Refer Fig.21)

Memorized data are not erased even if the

lensmeter is in auto-off state.

Fig.21 Auto-off state

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5.1 Replace the Lamp

1. Put the main switch off and pull the powercord out from socket.

2. Remove the bottom lamp house cover.

3. Pull the lamp out from the lamp socket.

CAUTION

As the illumination bulb can get quite hot,replace it when it is cool.

Otherwise, it may cause an injury.

4. Set the new lamp in the process of opposite

order.

Do not hold glass part of lamp by naked hand,

hold it with cloth.

CAUTION

In replacement of the lamp, do not touch the inside of the instrument.

An electric shock may occur.

5. After replacement of lamp, if the part of target on the screen becomes dark or target blurs

with flow when it is in defocus, adjust it by turning lamp adjusting screws at the brightest.

Fig.22

5MAINTENANCE

Lamp

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5.2 Replace the Fuses

1. Put the main switch off and pull the powercord out from the socket.

2. Remove the fuse folder.

Push both sides of the fuse holder with a thin

screwdriver to release the fixing lips, and pull

the holder out.

CAUTION The fuse holder is also used as a voltage

selector. Be careful not to change the

numbers show in the voltage indication

window. If the voltage setting dose not

match the supplied power voltage, it may

cause a fire or malfunction.

3. Replace the fuses.

Replace the fuses and set the fuse holder back into position.

CAUTION

Be sure to use the correct fuses specified on the label beside the fuse folder.

When replacing the fuses, be sure to replace both of them with the new ones.

If the wrong fuses are used, the instrument may malfunction and may cause a fire.

If the fuse blows again, do not touch the internal structure. Contact your authorized

distributor.

Fig.23

Voltage indication window

Fixing lip

Fixing lip

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5.3 Replace the Ink Cartridge

When markings become faint, replace the ink cartridge.Use a specified cartridge for refills.

1. Remove the C type ring by pressing a tip of

the ink cartridge.

* During work, take care to prevent a possible

loss of the C ring.

(Using a tweezers can avoid a loss of the C

ring when attaching it.)

* As a spring and cartridge are fallen out when

the C ring is removed, take care to prevent

possible loss of them.

2. Remove the screw from disattached ink

cartridge with a precis ion phil l ips

screwdriver.

3. Attach the screw removed in preceding step

to a new ink cartridge.

* The head of screw must be 0.5 - 1mm outside

from the cartridge.

4. Insert the spring and the new cartridge into

the marker holder, and fit the C ring between

the screw and ink cartridge.

Fig.26 Screw

Fig.25

Marker holder

Ink cartridge

Spring

Fig.24

C type ring

Fig.27

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5.4 Replace the Printer Paper

When printer paper is exhausted, replace it with new one.


2. The tip of printer paper is inserted through

the shot. (Refer Fig.28)

3. Keep pressing PRINT switch and feed the

printer paper.

4. Pass the printer paper through the exit ofthe printer cover and closed the cover.

NOTE

Once printer paper is feeded, do not pull

the paper for opposite direction.

5.5 Cleaning of Protective GlassPeriodically, detach the nosepiece and remove the dust and dirt on the protective glass.

1. Remove the nosepiece upward.

2. Blow dust off on the protective glass with a

blower brush and then, wipe it off with a soft

cloth or lens cleaning paper gently.

Fig.28

Fig.29

Nosepiece

Protective glass

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5.6 Cleaning Exterior

When the exterior parts of the instrument become dirty, wipe with a dry and soft cloth. Forstubborn dirt, immerse the cloth in a neutral detergent, wring well and wipe. Finally wipe off with

a dry and soft cloth.

NOTE

Never use an organic solvent such as paint thinner to clean the instrument as it may ruin

the surface of the instrument.

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Type : Projection type - Magnification 40X

Digital display - Sphere, Cylinder, Axis, ADD

Measuring target : Cross-line and coronaSphere power

Measuring range : 0 to 25D

Measuring unit : 0.12 or 0.25D steps

Accuracy :

Cylinder power

Measuring range : 0 to 9.87D

Measuring unit : 0.12 or 0.25D steps

Cylinder power : +, or MIX

Addition power

Measuring range : 0 to 9.87DMeasuring unit : 0.12 or 0.25D steps

Cylindrical Axis angle

Measuring range : 0 to 180

Measuring unit : 1 steps

Accuracy : 1

Prism diopter power


0 to 20 (in case using prism compensator)

Measuring unit : 1 stepsAccuracy :

6SPECIFICATIONS

Values in prism diopters()

Measuring range Accuracy

> 0

50.1

> 510

0.2

Values in diopters(D)

Measuring range Accuracy

< 0 -5 > 0

+5 0.06

< -5 -10 > +5

+10 0.09

< -10 -15 > +10+15 0.12

< -15 -20 > +15+20 0.18

< -20 > +20 0.25

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Prism Axis angle


Measuring unit : 1 steps

Measurable lens diameter : 9 to 100mm

Illumination lamp : 6V 20W G4, Halogen lamp

Power source

Voltage : 100, 120, 220, 230Vac 10%

Frequency : 50/60 Hz

Power consumption : 40VA

Dimensions and weight : 165(W)315(D)420(H)mm 7kg

Environmental condition

Temperature : +10 to +40 C (In usage)

-40 to +70 C (In storage/Transference)

Humidity : 30 to 85 % (Non-condensing) (In usage)

10 to 100 % (In storage/Transference)

Accessories : Spare lamps (1 pc.)

Dust cover (1 pc.)

Printer paper (1 pc.)

Nosepiece for contact lens (1 pc.)

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lm-770_ome - manual

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