km-500 autokeratometer manual

8/12/2019 KM-500 Autokeratometer Manual

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NIDEK

AUTO KERATOMETER

Model KM-500

OPERATORS MANUAL


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* Specifications are subject to change without notice for improvement.

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 082004. 2

31511-P902I

Printed in JAPAN


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BEFORE USE OR MAINTENANCE, READ THIS MANUAL.

This Operators Manual contains information necessary for the operation of the NIDEK

AUTO KERATOMETER Model KM-500. This manual provides a detailed description

of the device, as well as cautions, specifications, accessories, procedure for operation,and maintenance. In this manual, IEC 60601-1 and UL standards are applied. The

dioptric powers are indicated with refernce wavelengh of 546.07nm.

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

be thoroughly understood before using this instrument. Also, have the manual always

near the instrument so that you can read it whenever it is necessary.

There are no user-serviceable parts inside the instrument except a printer paper.

Therefore, if you find any problems or have questions about the instrument during

operation, please contact your authorized distributor.


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Table of Contents

1 INTRODUCTION........................................................................................................ 1-11.1 Outline of Product .................................................................................................... 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 In Storage ................................................................................................................. 2-3

2.3 In Installation ............................................................................................................ 2-3

2.4 In Wirings ................................................................................................................. 2-4

2.5 After Use ..................................................................................................................2-4

2.6 In Maintenance ......................................................................................................... 2-5

2.7 Disposal ....................................................................................................................2-5

2.8 Others ....................................................................................................................... 2-5

2.9 Labels ....................................................................................................................... 2-6

3

CONFIGURATION ..................................................................................................... 3-1

4 SETTING AND CONNECTION ................................................................................ 4-14.1 Setting of the Main Body and the Battery Pack ....................................................... 4-1

4.2 Connection of Battery Charger ................................................................................. 4-1

4.3 Mounting the Main Body on a Slit Lamp................................................................. 4-2

4.4 Mounting the Main Body on the Slide Base ............................................................ 4-3

4.5 Interfacing with External Instruments ...................................................................... 4-4

5 OPERATING PROCEDURES.................................................................................... 5-15.1 Preparation ............................................................................................................... 5-1

5.2 Standard Measurement ............................................................................................. 5-3

5.3 Sagittal Radius Measurement ................................................................................... 5-5

6 CHARGING THE BATTERY PACK ........................................................................ 6-17 OTHER FUNCTIONS ................................................................................................. 7-1

7.1 Illumination of Display Panel................................................................................... 7-1

7.2 Change of Corneal Curvature Display ..................................................................... 7-1

7.3 Parameter Setting ..................................................................................................... 7-1

7.3.1 Setting change ................................................................................................. 7-17.3.2 Parameter setting list ....................................................................................... 7-2

Page


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7.4 Time Setting ............................................................................................................. 7-6

7.5 Comment Setting ...................................................................................................... 7-7

8 MAINTENANCE .........................................................................................................8-18.1 Cleaning ................................................................................................................... 8-1

8.1.1 Cleaning the plastic body ................................................................................ 8-1

8.1.2 Cleaning of Measuring Window, Observation Window,

and Measuring Light Source Part .................................................................... 8-1

8.2 Replacement of Printer Paper (Option) .................................................................... 8-1

8.3 List of Parts for Replacement ................................................................................... 8-3

9 SPECIFICATIONS ...................................................................................................... 9-1

10 ACCESSORIES.......................................................................................................... 10-110.1 Standard Accessories ............................................................................................ 10-1

10.2 Optional Accessories ............................................................................................ 10-1

Page


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[This page is intentionally left blank.]


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1.1 Outline of Product

This device is a keratometer which consists of main body and other various options, such asHand Held type, Slit Lamp Joint type, and Slide Base type. By using a specified printer, it can

also output data to NIDEK US (Ultrasonic instrument) series, or external computers.

1.2 Indications for Use

This device is designed to measure and indicate the radii of curvature and principal meridians of

the human corneas central area and peripheral areas. The measured value of the corneal curvature

is used for the prescription of visual acuity corrective lenses such as contact lenses.

1.3 Classifications

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

The KM-500 is classified into Class a system.

[Protection method against electric shock] Class I

The KM-500 is classified into Class I instrument.Class I instrument in which protection against electric shock does not rely on basic insulation

only, but which includes an additional safety precaution in such a way that means are provided

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

fixed wiring of the installation in such a way that accessible conductive parts cannot become

live in the event of a failure of the basic insulation.

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

The KM-500 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).

[Degree of protection against ingress of liquids] IP20

The KM-500 is the ordinary instrument (enclosed instrument without protection against ingress

of liquids). Be careful not to splash water on the instrument.

[Degree of protection against flammability]

The KM-500 is classified as an instrument not suitable to be used in a potentially flammable

environment.

Do not use near flammable materials.

1 INTRODUCTION


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

It is possible to wipe the forehead rest and chin rest with a cloth dampened with alcohol as

necessary.

[Mode of operation]

Continuous operation

1.4 Symbol Information

Caution : See explanation in manual

Direct Current

Alternating Current

Input

Output

Write data into memory device

Power ON

OFF (power)

OFF (main body)

Type B Applied Part

Charging

Indoor use

For recycling


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2 SAFETY

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.

When using this system, be sure to follow all the instructions below in order to avoid damage to

the personnel and the system.

2.1 Operation

CAUTION

Do not modify or touch inside of the instrument.

You may get an electric shock or the system may malfunction.

Be sure to use the specified electrical current.

If the supplied voltage is too high or too low, the instrument may not work sufficiently,

may malfunction or cause an electric shock.

Never yank the power cable to disconnect from receptacles but hold the plug.

This can weaken the metal core of the cable and may result in a fire from short circuit,

or an electric shock.

Do not place the instrument on top of the cable.

The cover of the cable becomes ragged and may cause a fire or an electric shock from

short circuit.

If the metal core of the power cable is exposed, power turns on and off by shaking thecable, or cable/plug gets so heated that one cannot hold it, it means that the cable is

damaged. Immediately replace the cable.

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 remove the

power cable and contact your authorized distributor.


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CAUTION

Never touch the device with wet hand.

You may get an electric shock or the system may malfunction.

Never make the short circuit for each connectors on the Battery Pack and the Battery

Charger.

It may cause overheat and the damage of the instrument or the operator may get burned.

Never throw the battery pack into the fire.

It may explode.

Never drop the battery pack into the water.

Charging function will be damaged.

Never charge the battery pack with unspecified battery charger or remodeled one.

It may cause the battery explosion.

Indoor use only.

If this device should for any reason malfunction, do not touch the inner structures, but

contact your authorized distributor.

In advance of a measurement of each patient, wipe the forehead rest and chin rest with a

clean cloth. Moreover, remove one chin rest paper for each patient if a bunch of the chin

rest papers is fixed on the chin rest. If necessary, wipe the forehead rest and chin rest

using a cloth dampened with rubbing alcohol.

NOTE

Charge the battery pack before use for the first time since the electricity has been self-

discharged. Make sure to charge in a correct way.

Keep the measuring window and observation window away from direct sun light or bright

illumination.

Never use or store the device where the wind from air conditioner comes directly.

When using the optional printer, never place any obstacle between the data transmitting

window of the battery pack and the data receiving window of the printer.

Never touch the inner optical part of the measuring window to keep away from fingerprints

and dusts; such things may affect the result of measurement.


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NOTE

Use the specified cables for connecting each unit of the device.

Never disassemble the device.

Never use the battery pack for any other purpose.

2.2 In 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 In Installation

CAUTION

This instrument has been tested and found to comply with the limits for medical devices

to the IEC 60601-1-2: 1993, EN 60601-1-2: 1994, Medical Device Directive 93/42/EEC.

These limits are designed to provide reasonable protection against harmful interference

in a typical medical installation. This instrument generates, uses and can radiate radio

frequency energy and, if not installed and used in accordance with the instructions, may

cause harmful interference to other devices in the vicinity. However, there is no guarantee

that interference will not occur in a particular installation. If this instrument does cause

harmful interference to other devices, which can be determined by turning the instrumentoff and on, the user is encouraged to try to correct the interference by one or more of the

following measures:

- Reorient or relocate the receiving device.

- Increase the separation between the instrument.

- Connect the instrument into an outlet on a circuit different from that to which the

other device (s) are connected.

- Consult the manufacturer or field service technician for help.

Never use the instrument with cable or accessories other than the designated ones.

Malfunction caused by deteriorated electromagnetic compatibility (EMC) characteristics

may result.


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CAUTION

Never use portable and mobile radio frequency (RF) devices in the vicinity of this

instrument.

These devices may adversely affect medical electrical equipment and malfunction may

result.

Do not install the instrument near water.

If water gets into the internal structure, there is a possibility of an electric shock or

instrument malfunction.

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

The instrument may not perform measurement correctly or may malfunction.

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

possible injury.

NOTE

Use the instrument in following conditions.

Temperature : 10 - 40 C (50 - 104 F)

Humidity : 30 - 75% (Non-condensing)

A dust free environment

A light interference free environmentA vibration and shock free environment

2.4 In Wirings

CAUTION

Be sure to use the grounding-type wall-outlet for power source.

In the event of electric leak, your may get and electric shock.

Before connecting the cables, provide a stable and level place.

If the instrument is tripped over, it may injury or instrument malfunction.

2.5 After Use

CAUTION

If the instrument is not to be used for a long time, disconnect the power cable from the

wall outlet.

This may cause a fire.


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2 - 5

2.6 In Maintenance

CAUTION If disassembling is necessary to repair the instrument, be sure to ask your authorized

distributor for servicing.

Be careful not to leave fingerprints or dust on the measuring window.

This will substantially lower the reliability of the measurement results.

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

This may ruin the surface.

2.7 Disposal

NOTE

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

device components.

Especially the battery pack is provided with a nickel-cadmium battery, and the printer

has a lithium battery on the board.

The nickel-cadmium batteries are reusable resources. In the interest of recycling raw

materials, please do not dispose of the battery pack in the household waste at the end of

its useful life.

The disposing method of lithium batteries varies according to the government. Follow

the local governing ordinates and recycling plans when disposing a board with lithium

batteries.

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

and recycling plans.

2.8 Others

CAUTION

When the instrument is sent back to NIDEK for repair or maintenance, wipe the surface

(especially, the area where the patients skin contacts) of the instrument with a clean cloth

immersed in ethyl alcohol for disinfection.


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2.9 Labels

In order to draw the operators attention, the appropriate warning labels are attached to thespecified locations.

Main Body

AC Adapter

or

[Bottom View]

[Connecter Part side]

(For 230V areas)

or


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Battery Pack (Only for Hand Held Type)

or

Battery Charger (Only for Hand Held Type)

[Top View] [Bottom View]

or

(For 230V areas)


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SL Arm (Only for Slit Lamp Joint Type)

or

Slide Base (Only for Slide Base Type)

or

[Top View]


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[Side View]

(Both Sides)

Printer (Option)

or

[Bottom View]


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3 CONFIGURATION

Main Body

Observation Window

Display Panel

Print Button

Setting Button

OFF Button

L (left) Button

R (right) Button

Mire Part

Measuring Light

Source Part

Measuring

Window

Connection Part


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Observation Window

The operator looks through this window

to measure the patients eye.

Display Panel

This panel displays measured data and

other information.

Print Button

This button is used to transmit data to the

printer.

Setting ButtonThis button is used to set various param-

eters.

OFF Button

This button is used to turn the power OFF.

L (left) Button

This button has two functions which are

to put the power ON and to start the left

eye measuring mode.

R (right) Button

This button has two functions which are

to put the power ON and to start the right

eye measuring mode.

Mire Part

This part is a light source which works as

a substitute for the mire chart. It is alsoused to illuminate the anterior part of the

eye.

Measuring Light Source Part

This is used as a light source for measure-

ment.

Measuring Window

The patient looks at the red fixation light

through this window.

Connection Part

This part is connected to battery pack, SL

arm, or mounting bracket of slide base.


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Display Panel

R1 Sign

R2 Sign

AVE Sign

CYL Sign

AX Sign

R, L Sign

Battery Sign

N,T Sign

SAGIT K Sign

Meridian Display

Target Ring Mire Ring Fixation Light

[Operators View][Patients View]

AC Adapter

Pilot Lamp Power Switch Power Inlet Jack


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R1 Sign

This shows the data of minor meridian.

R2 Sign

This shows the data of major meridian.

R, L Sign

This shows the measuring eye either R

(right) or L (left).

Battery Sign

This shows the remaining power of bat-

tery (Only for Hand Held Type). If signis ON or the display is too light to read,

recharge the battery.

N,T Sign

This shows N (Nasal) side and T (Tempo-

ral) side of measuring eye.

Meridian Display

This shows the abbreviated figure of cor-

neal shape with the lines based on the

measured data.

The long line shows the minor merid-

ian, and the short line shows the cor-

neal astigmatism value as follows.

CYL = 0D

0D < CYL < 3D

3D CYL < 6D

6D CYL

SAGIT K Sign

This shows that Sagittal Radius is being

measured.

AX Sign

This shows the axis of minor meridian.

CYL Sign

This shows the cylindrical value.

AVE Sign

This shows the average value of R1 and

R2.

Target Ring

This ring is used to make a focusing.

It lights in the condition when the

keratometer is out of focus and when

the focusing point approaches, it starts

blinking. The blinking speed becomes

faster as it comes closer to the focusing

point.

Mire Ring

This is used to observe the shape of the

corneal surface.

Fixation Light

This light is used to fix the patient's eye.


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Power Cable

(230V)

(110V)

Specified Cable

Battery Pack (Only for Hand Held Type)

Main Body Connection Part

Data Transmission Window

Trickle Charge Terminal

Battery Charger (Only for Hand Held Type)

[Top View] [Side View][Bottom View]

Charging Indicator

Power Indicator


Jack (Both Sides)

Fast Charge Connector


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This part is used to connect to the main

body to supply the power or to charge fast

the internal battery.

Data Transmission Window

Through this window, measured data is

wireless-transmitted to the printer (Op-

tion).


These terminal is used to charge tricklingly

the internal battery.


This is used to charge tricklingly the bat-

tery pack.

Charging Indicator

This indicator will light while battery is

being fast-charged. When it is on trickle

charge, it does not light.

Power Indicator

This indicator will light while power is

supplied to the battery charger.

Jack

This is used to input/output the data and

to supply the power.

Fast Charge ConnectorThis is used to connect the battery pack

and to charge fast. During this charge, the

charging indicator lights.


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SL Arm (Only for Slit Lamp Joint Type)


JackSlit Lamp Connecting Shaft

Slide Base (Only for Slide Base Type)

Jack

(Both Sides)

Joystick

Start Button

Mounting Bracket

Forehead rest

Chin rest

Chin rest elevation

knob

Head Rest (Option)


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The main body is mounted on this part.

From this part, the power is supplied and

the data is output.

Mounting Bracket

The main body is mounted on this part.

From this part, the power is supplied and

the data is output.

Start Button

This button is used to measure the same

eye again, to start the sagittal radius mea-surement, or to change the parameter item

No..

Joystick

This joystick offers one handed operation

for lateral and vertical movements.

Manipulate this joystick to move the

main body laterally for focusing, and

also turning of this joystick controls

vertical movement to raise or lower themain body.

Jack

This is used to input/output the data and

to supply the power.


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Printer (Option)

Memory IndicatorPaper Feed ButtonData Receiving WindowPower Indicator

Printer Paper Holder

External Jack (RS-232C)

Jack (Both Sides)

Printer Paper Inlet Slot

Printer Paper Outlet Slot


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Memory Indicator

This indicator will light while the mea-

sured data are stored in the printer.

Paper Feed Button

It works as a paper feed button when

Memory indicator is not ON and it also

works to re-print the memorized data when

Memory indicator is ON.

Data Receiving Window

This receives the data from the Data Trans-

mission Window of the Battery Pack.

Power Indicator

This indicator will light while power is

supplied to the printer.


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4.1 Setting of the Main Body and the Battery Pack

Setting:Put the marks of the main body and the

battery pack together. Then slide the battery

pack to the right to assemble them.

Removing:

Slide the battery pack to the left to separate

them.

4.2 Connection of Battery Charger

The battery charger and the printer have two power jacks for each. Connect appropriately

according to the setting place.

Use only the cables of our supply.

4SETTING AND CONNECTION

Main body

Grooves

Battery pack

Top view of Battery pack Bottom view of Main body

Battery charger

Specified cable (2m)

AC adapter

Power cable

Specified cable (0.4m)


PrinterAC adapter

Power cable

Battery charger

marks


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4 - 2

4.3 Mounting the Main Body on a Slit Lamp

1. Mount the SL arm on a slit lamp.The SL arm can be mounted on the slit lamp

which can hold the focusing rod, such as the

NIDEK slit lamp, or Haag type slit lamp, etc.

2. To join the main body to the SL arm,

put the marks of the main body and the

SL arm together. Then slide the main body

to the left to assemble them.

3. Connect the cables as shown below.

SL arm

Focusing rod setting hole

Main body

Slit lamp

SL arm

Main body

Slit lamp

SL arm

Main body

Specified cable

(2m)

Specified cable

(0.4m)

AC adapter

Power cable

AC adapter

Power cable

Printer

Specified cable

(2m)

SL arm


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4.4 Mounting the Main Body on the Slide Base

1. To join the main body to the slide base, putthe marks of the main body and the slide

base together. Then slide the main body to

the left to assemble them.

2. Connect the cables as shown below.

Main body

Main body

Slide base

Specified cable (0.4m)

Printer


AC adapter

Power cable

Slide base

AC adapter

Main body

Specified cable (2m) Power cable


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4 - 4

4.5 Interfacing with External Instruments

When connecting this device to external instruments [such as NIDEK US (Ultrasonicinstruments) series or external computer]*1, make sure to use external jack (RS-232C) of

the printer and connect the instrument with external connection cable.

External instrument (personal computer etc.)

External Connection Cable

Printer

*1 Accessory equipment connected to the analog and digital interfaces must be certified

according to the representative appropriate national standards (for example, UL 1950 for Data

Processing Equipment UL 2601-1 for Medical Equipment, and CSA C22.2 No. 601-1, EN

60601-1 and IEC 60601-1.)

Further more all configurations shall comply with the system standard IEC 60601-1-1.

Everybody 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 representative.


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5.1 Preparation

[For Hand Held Type]

1. Have the patient remove glasses or contact

lenses.

2. Turn the power switch of the AC adapter ON

(|) to supply the power to the whole system.

3. Have the hand strap on the wrist and hold

the main body.

4. Put the other hand on the main body to make

it stable.

[For Slit Lamp Joint Type]

1. Ask the patient to take off glasses or contact

lenses.



3. Clean the forehead rest and chin rest with a

clean gauze. If a bunch of chin rest papers is

fixed on the chin rest, remove one paper.

4. Put the patients head on the head rest of

the slit lamp steadily.

5. Turn both the illuminating arm and the

microscope arm of the Slit Lamp to the same

direction so that they do not obstruct the

keratometer measurement.

6. Slide and turn the SL arm to face the main

body to the patient.

5OPERATING PROCEDURES

Main body

Battery pack

Hand strap

Illumination part

Main body

SL arm

Microscope arm


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5 - 2

[For Slide Base Type]

1. If the joystick is locked, move the cross slide

base forward to release the lock.

NOTE

To lock the cross slide base, position the

joystick to the center and pull it backward.

2. Ask the patient to take a seat and to take off

glasses or contact lenses.



4. Clean the forehead rest and chin rest with a

clean gauze. If a bunch of chin rest papers is

fixed on the chin rest, remove one paper.

5. Ask the patient to put his/her chin on the

chin rest and his/her forehead on the pads

on the forehead rest.

6. Align the patients eye with the observation

window position by turning the chin rest

elevation knob or manipulating the joystick.

Forehead rest

Observation

window

Chin rest

Chin rest

elevation knob

Cross slide base


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5 - 3

5.2 Standard Measurement

1. Press R or L button which corresponds tothe patients eye.

The power will automatically be turned ON.

When using the slide base type, and if it is

not the first operation after the power supply,

the power can be turned ON by pressing the

start button or moving the cross slide base

laterally. The measuring-eye side is detected

by the slide base automatically.

2. Ask the patient to watch the fixation light

(red light) inside the measuring window.

3. While looking into the observation window,

move the main body until the size of target

ring almost coincides with the outer circles

of iris and the target ring become concentric

circle with the mire ring.

4. When this measuring window is brought

around the focusing point (about 40mm in

front of patients eye), the target ring may

start blinking, and its blinking speed

becomes higher as the focusing point gets

closer.

When it is exactly focused, a beep sounds and

the target ring disappears so as to notify that

the measurement is now completed.

When seen with both eyes and the main body

is at around the focusing position, the mire ring

and the target ring looks at the same position.

If you see the mire ring farther than the target

ring, move the main body closer to the patients

eye. If you see it closer, move the main body

apart from the patients eye.

R bouton

Mire ring

Target ring

Focusing point

About 40 mm

light

fast blinkblink

light

[Target Ring]


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5 - 4

NOTE

If the eyelashes obstructs the outer target ring, correct measurement may not be

performed. In this case, ask the patient to open eyes widely. If opening is still notenough, make them open with your finger.

Ask the patient not to blink eyes while measuring.

5. Repeat the process of 1. - 4. to measure the other eye.

It can memorize 5 measured data for each eye. When data is inputted more than 5 for one eye,

the old data will be deleted.

When there are more than 3 measured data in the memory, the selected data will be obtained on

the printout.

When parameter item No. 21 Auto-print is set to YES, the measured data will be

automatically printed out as soon as the measurement of both eyes are finished (except when

using the Hand Held type). The auto-print will not be activated at sagittal radius measurement.

6. Press the Print button on the main body

to print out the measured data whenever it

is necessary.When using Hand Held Type, aim the data

transmission window at the data receiving

window of the printer, then press the Print

button. The data wil l be transmitted to the

printer and be printed out.

Check if the memory indicator of the printer

goes OFF once and ON again when

transmitting. If not, press the Print button

again.

7. Press the OFF button to turn the power

OFF.

The Auto-OFF function turns OFF the power

automatically when no button operation is done

more than 3 minutes.Printer


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5 - 5

5.3 Sagittal Radius Measurement

This measurement is not appropriate for Hand Held Type since the holding hand shakes to disturbthe measurement. Use something to fix the patients head such as the head rest of Slit Lamp or

Slide Base.

Change the parameter settings of 10, , for sagittal radius measurement. (See 7.3 Parameter

Setting)

1. Put the patients chin on the chin rest. Then ask him/her to put the forehead on the

forehead rest.

The patients head should be fixed to make this measurement.

2. Press R (or L) button to select the patient eye.

3. Make the regular measurement.

4. Press Setting button to change the display to Sagittal Radius measurement condition.

The SAGIT K sign appears on the display panel.

5. The patient will see a red spot on the left of measuring light source part. Ask the patient

to watch it.

6. The circle and the dotted line on the N (or T) side of meridian display will blink.

Press R (or L) button or start button of the slide base to start measuring.

7. Bring the main body to the position that the mire ring and the target ring on the eye

become concentric circle, then move it back and forth to adjust the focus.

The sagittal radius will be measured.

8. The patient will see a red spot on the right of measuring light source part. Ask the patient

to watch it.

9. The circle and the dotted line on the T (or N) side of meridian display will blink.

Make the measurement in the same manner as step 6. and 7.

10. The patient will see a red spot at the bottom of measuring light source part. Ask the

patient to watch it.

11. The circle and the dotted line at the bottom of meridian display will blink. Make the

measurement in the same manner as step 6. and 7.


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1. Check if the power indicator for battery charger is ON.

2. Connect the battery pack with the battery charger according to the following use.

As trickle charge is just a supplement for the natural discharge, it is necessary to make the fastcharge when the battery sign appears.

[Trickle charge]

As shown on the right, put the main body which

is connected with the battery pack on the battery

charger.

When the main body is set on the battery

charger, the power indicator brightens to give

a notice that it is properly set.

NOTE

To maximize battery charge, turn the main body off before placing in this charger.

[Fast charge]

1) Disconnect the battery pack from the main

body.

2) Pull out the fast charge connector from the

battery charger.

3) Connect the battery pack to the fast charge

connector.

The power supply terminals on the battery

charger is contacted with the charging

terminal on the battery pack and the charging

will be started. While charging, the charge

indicator will light and it turns off whencharging is completed.

Fast charge takes about one and a half hour.

NOTE

Do not turn the power switch of AC adapter (OFF) until the charging is completed.

The instrument battery should only be recharged when the letters/numbers on the displaypanel have begun to fade. Premature charging will reduce lifetime memory permanently.

6CHARGING THE BATTERY PACK

Main body Battery pack

Battery charger

Battery charger

Battery packFast charge connector


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6 - 2

Battery Charger Instruction

Charge the battery pack when the letters/numbers on the display panel fades.

Do

In order to charge the battery pack to full capacity, do not charge it before the letters/numbers on

the display panel has faded.

Dont

Do not stop charging before it is charged to full capacity and the charge indicator goes out.

Otherwise, the specified time of battery use will be shortened.

NOTE The battery may not perform sufficiently as long-term storage causes a self-discharge

or an inactivation of reaction substance.

Store the battery pack under the following conditions.

- A place that is not exposed to direct sunlight

- A narrow temperature variation environment

- 10C to 30C (recommended temperature)

To avoid performance degradation and leakage due to self-discharge, full charge the

battery pack at least once half a year and use it until the battery is exhausted.

The battery may not be charged properly at the first charge after long-term storage.

In such a case, the battery will be recovered after charging and discharging (use until

the battery is exhausted) several times.

Charged to full capacity Letters/numbers on the display

panel has faded.

Charge to full capacity

Charged to full capacity Letters/numbers on the display

panel has not faded.

Do not charge because it can not

be charged to full capacity.


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7.1 Illumination of Display Panel

The display panel will be illuminated when R (or L) button is pressed more than 2 seconds. Toturn OFF the light, press OFF button and finish measuring.

This description is only for the case that parameter item No.23 Back-light is set to NO.

7.2 Change of Corneal Curvature Display

If you press Setting button after the measurement, the corneal curvature display changes to

other way (D or mm).

The regular display unit can be set in parameter setting mode by selecting either D or

mm.When Sagittal radius mode is set and the parameter is set to yes, this button is used to

change the measuring directions and functions of sagittal radius.

7.3 Parameter Setting

KM-500 is equipped with the functions to set the various parameter of the device according to

the operators way of use.

For the item numbers, setting items, and setting contents, see the parameter setting list on the

next page.

7.3.1 Setting change

1. Press R (or L) button to turn ON the power.

2. Press Setting button more than 2 seconds to change the display to parameter setting

condition.

3. By every press of OFF button, the item No. increases.Referring to the parameter setting list on the next page, indicate the desired item No. on

the display panel.

Item No. is displayed on the left top of the display panel.

When the Slide Base type is used, the start button can also be used for this operation.

4. Press R (or L) button to change the setting contents.

Setting contents are manifested with numbers or abbreviations, and it is displayed on the right

top part of the display.

5. Repeat the process in 3. - 4. to set other parameters.

6. Press Setting button to finish the setting.

7OTHER FUNCTIONS


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7 - 2

7.3.2 Parameter setting list

* The underline shows the factory setting.

* To use the functions of circled number, optional printer is required.

* For item No. - , external connecting cable is required as well as the printer. These

items are used for communication with NIDEK US series and other external computer.

No. Items Contents1 Display change of R1, R2 / AVE, CYL R1, R2 / AVE, CYL

2 Display Unit of Corneal curvature mm / D

3 Step of Refractive power display 0.01D / 0.12D / 0.25D

4 Corneal Refractive index 1.3375 / 1.336 / 1.332

5 Mire ring brightness 1:(Dark) 5:(Bright) (3)

6 Display contrast 1:(Low) 5:(High) (3)

7 Beeping sound High / Low / NO

8 Auto-OFF YES / NO

9 Fixation Light YES / NO

10 Measurement of Sagittal radius YES / NO

Axis for Sagittal radius data Fix / Axis

Sagittal radius data print format All / Short

Data format Y.M.D / M.D.Y

Print format All / Short / NO

Time setting See 7.4 Time Setting

Comment Setting See 7.5 Comment Setting

Baud-rate 1200 / 2400 / 4800 / 9600

Bit length 7 / 8

Interface carriage return code YES / NO

Interface format All / Short

21 Auto-Print YES / NO

22 Continuous Measurement 1 5 times (1)

23 Back-Light YES / NO


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7 - 3

The followings are an explanation of the items.

[Item No.1] Serves to choose R1, R2, or AVE, CYL of the display.

[Item No.2] Serves to set the data display of corneal curvature value either corneal radius

(mm) or corneal refractive power (D).[Item No.3] Serves to select the diopter step of corneal refractive power (which is converted

to diopter from the corneal radius.)

[Item No.4] Serves to select the desired corneal refractive index to convert the corneal radius

to corneal refractive power.

[Item No.5] Serves to control the brightness of Mire ring.

[Item No.6] Serves to control the contrast of display.

[Item No.7] Serves to decide whether the beep sounds when any button is pressed.

[Item No.8] Serves to select the Auto-off function. At the condition that power is ON, the

power of the main body becomes OFF after passing a certain time without pressing

any button.

[Item No.9] Serves to choose ON or OFF of the Fixation light.

[Item No.10] Serves to decide whether to measure the Sagittal radius.

[Item No.11] Serves to decide whether to convert the Sagittal radius data for the principal

meridian angle. To obtain the converted data, choose AXIS.

[Item No.12] Serves to choose the printout format of Sagittal radius data.

All ............ All data are printed out.

Short ........Only Sagittal radius value and the total eccentricity are printed out.

The followings are the sample printings for left eye and explanations of Sagittal

radius data.

= Sagittal radius on each side

SUP. = Superior side

INF. = Inferior side

TEM.= Temporal side

NAS. = Nasal side

A = Principal Meridian Angle(F = Fixation Angle)

E = Total Eccentricity


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7 - 4

S = Sagittal data which the dRo value is added to

or reduced from Sagittal radius values

e = Eccentricity values of each Sagittal radius

eh = Eccentricity on horizontal meridian

ev = Eccentricity on vertical meridian

ASTc = Corneal astigmatism of central part

ASTp = Corneal astigmatism of peripheral part

Rh = Average of Corneal curvature on horizontal

meridian

Rv = Average of Corneal curvature on vertical

meridian

Ro = Average of Corneal curvature on central part

dRo = Difference of Corneal curvature between R1

and R2

dAST= Difference of Corneal astigmatism between

central part and peripheral part

[Item No.13] Serves to choose the date format.

Y.M.D. = Year, Month, Day.

M.D.Y. = Month, Day, Year.

[Item No.14] Serves to choose the print out format of the measured data.All ............ All measured data and selected values are printed out.

Short .........Only the selected value is printed out.

NO ............Nothing is printed out.

(This setting is for transmitting the data to some external

instruments.)

When there are only two data or less, the latest value will be printed out.

The following is the sample printing of measured data.

Name and Sex

Date and Time

Selected value of Corneal curvature

Comment


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7 - 5

[Item No.15] Serves to set the time.

[Item No.16] Serves to input the comment.

[Item No.17] Serves to choose the transmission speed of the bit (baud rate) in communication.

[Item No.18] Serves to choose the bit number of a single character in communication.

[Item No.19] Serves to decide whether CR code should be added at the end of the transmitting

data, or not.

[Item No.20] Serves to choose the All(all data) or Short(shortened data) format of transmitting

data.

[Item No.21] Serves to decide whether to print the data out automatically after the measurement

of both eyes are completed.

(This function does not effect when the device is used as Hand Held Type.)

[Item No.22] Serves to set the times of continuous measurement.

Measurements are taken several times in a row for each eyes according to the set

number.

[Item No.23] Serves to leave the back-light of the display panel ON. The back light can also be

ON by pressing R or L button for a while at the beginning of the measurement

(See 7.1 Illumination of Display Panel).

Name and Sex

Date and Time

Corneal curvature

= Right eye

= Left eye

R1 = Minor meridian

R2 = Major meridian

AVE = Average of R1 and R2

CYL = Corneal astigmatism

deg = Corneal axis

Comment

Selected value


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7 - 6

7.4 Time Setting

(Only for when connecting the optional printer)

1. Press R (or L) button to put the power ON.

2. Press Setting button more than two seconds to shift the display to the parameter

setting condition.

3. Press OFF button to set the Item No. to 15.

4. Press R (or L) button to set to the time setting mode.

The date and time parameter appears on the left column and the go sign appears on the rightcolumn of the display. There are two dots below the Year position to show the changing

position.

5. Each time you press OFF button, the position of the dots change in order as follows.

Bring the dots to the desired place.

6. By pressing R or L button, change the setting number as desired.

L button ..... Increases the number

R button ..... Decreases the number

7. Repeat the process of 5., 6. to set other time units.

8. After the setting is completed, press the OFF button to bring the dots to go.

9. Press R (or L) button to finish the setting.

If you press R or L button, the time will be transmitted to the printer and the clock starts from 0

second of the set time. Then the set time will be printed out from the printer. (When using the

Hand Held Type, do this operation with the data transmission window aimed at the data receiving

window of the printer.)

If you press setting button, the setting mode will be canceled.

Year Month Day Hour Minute go Year ......

(Top line) (Middle line) (Middle line) (Bottom line) (Bottom line) (Top line)


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7 - 7

7.5 Comment Setting

(Only for when connecting the optional printer)

1. Press R (or L) button to put the power ON.

2. Press Setting button more than two seconds to shift the display to the parameter

setting condition.

3. Press OFF button to change the Item No. to 16.

4. Press R (or L) button to change to comment setting mode.

The comment setting parameter appears on the middle line of the display panel. The number onthe left shows the indication place and the numbers on the right show the character code.

5. Each time you press OFF button, the number on the left changes from 1. to 48. Select

the number of the desired place.

The number of the indication place is shown below. The No.1 indicates the place on the left top

and the No.48 indicates the place on the right bottom.

6. By pressing R or L button, select the desired character code.

L button ..... Increases the character code number.

R button.....Decreases the character code number.

For the character code, refer to the Table of Character codes on the next page.

7. Press Setting button after the selection.

If you press Setting button, the setting will be over.

If you press the Print button while setting comments, the present set comment will be

printed out.

1 24

25 48


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7 - 8

Table of Character Codes

Following characters (marks) are available to input.

< Example >

To input the character N, which is at the column 4, line E of the table above, to the

7th column in the first line, display 7 4E on the display panel.


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8.1 Cleaning

8.1.1 Cleaning the plastic body

1. Blow dusts by blower brush.

2. Wipe the part with dry soft cloth.

To remove stubborn dirt, you should immerse a cloth in a neutral detergent and wring it well to

remove the dirt. After that, wipe it out with a dry soft cloth.

NOTE

Never use the organic solvent such as paint thinner. Such thing could dissolve the

surface of the instrument.

8.1.2 Cleaning of Measuring Window, Observation Window,

and Measuring Light Source Part

1. Blow dusts by blower brush.

2. For the adherent dust, wet an absorbent cotton with a little alcohol and wipe it out softly.

8.2 Replacement of Printer Paper (Option)

1. Turn the power switch of AC adapter | (ON).

8 MAINTENANCE

Power switch


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8 - 2

2. Pull the printer paper holder to the both sides

and remove the printer paper shaft.

3. Cut the printer paper at the paper inlet.

4. Discharge the remained paper by pressing

Paper Feed button.

5. Put the new printer paper into the paper inlet

slot with its outer side down.

6. Press Paper Feed button until the end of

paper comes out from the paper outlet slot.

Printer paper holder

Printer paper shaft

Cut


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8 - 3

7. Set the paper to the printer paper holder.

8. To remove the slack of the paper, turn the

paper with your hand.

9. Cut off the extra paper at the paper outlet.

8.3 List of Parts for Replacement

Article Order Number

Printer roll 80620-00001


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9 SPECIFICATIONS

(1) Measurable area (on the cornea)

Center Part 3.3 mm in diameter

(Corneal curvature : 7.7 mm)

(2) Size of Mire Ring (on the cornea)

4.7 mm in diameter

(Corneal curvature : 7.7 mm)

(3) Measurable range

Corneal radius (R1, R2, AVE)

Measurable range 5.00 to 10.00 mm

Indication step 0.01 mm

Measurement accuracy 0.05mm

Corneal refractive power (R1, R2, AVE)

Measurable range 33.75 to 67.50 D

(Corneal refractive index : n=1.3375)

Indication step 0.01 D / 0.12 D / 0.25 D

(Corneal refractive index : n=1.3375 Changeable to

n=1.336, n=1.332)

Corneal astigmatism (CYL)

Measurable range 0 to -10.00 D

Indication step 0.01 D / 0.12 D / 0.25 D

Corneal cylindrical axis (AXIS)

Measurable range 0 to 180

Indication step 1

(4) Sagittal Radius measurement

Measurable angle 25 from the center (superior, inferior, nasal, temporal)

Eccentricity (E)

Measurable range 4.10 to +2.05

(5) Display contents

Corneal radius (R1, R2, AVE)

Corneal refractive power (R1, R2, AVE)

Corneal astigmatism (CYL)

Corneal axis (AX)

Eccentricity [E] (for Sagittal Radius measurement)

(6) Time of measurementWithin 0.1 second.


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(7) Print out contents (When using printer)

Measured date and time

Corneal radius measured valueCorneal refractive power measured value

Sagittal Radius (for Sagittal Radius measurement)

Eccentricity [E] (for Sagittal Radius measurement)

(8) Power Source

AC Adapter*1 : A. 110 V~, 50/60 Hz, 30 VA *2

B. 230 V~, 50/60 Hz, 30 VA *2

Main Body : 6-25 V , 5 VA

Battery charger : 6-25 V , (Battery Pack : 6 V 1100 mAh)

Printer : 6-25 V , 8.5 VA (option)

(9) Dimensions and weight

Main Body : 97.5(W) 87.5(D) 201(H) mm 570 g

AC Adapter : 96(W) 155(D) 62(H) mm 1.1 kg

Battery Pack : 65.5(W) 68.5(D) 45(H) mm 200 g

Battery charger : 90(W) 244(D) 50(H) mm 370 g

SL Arm : 60(W) 238-371.5(D) 44.5(H) mm 490 g

Slide Base : 235.5(W) 239.5(D) 210.5-243.5(H) mm 4 kg

Printer : 133(W) 141.5(D) 49.5(H) mm 360 g (option)

Head Rest : 187(W) 88.5(D) 432(H) mm 1.1 kg (option)

(10) Environmental condition

Temperature : 10 - 40 C (In usage)

20 - 60 C (In storage/ Transference)

Humidity : 30 - 75 % (Non-condensing)(In usage)

10 - 95 % (In storage/ Transference)

Atmospheric pressure : 700 - 1060 hpa (In usage)

*Specifications are subject to change without notice for improvement.

*1 The electrical rating , A or B for the instrument is factory-configured.

*2 Main supply voltage fluctuation not to exceed 10% of the nominal voltage.


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km-500 autokeratometer manual

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