Nidek Medical AR-600 User manual

NIDEK
AUTO REFRACTOMETER
Model AR-600
OPERATOR’S
MANUAL

BEFORE USE OR MAINTENANCE, READ THIS MANUAL.
This Operator’s Manual contains information on operating procedures of the NIDEK
AUTO REFRACTOMETER Model AR-600, cautions for safety, specifications,
accessories, and maintenance suggestion.
The instrument complies with ISO 10342 (Ophthalmic instruments - Eye
Refractometers). IEC 60601-1 and UL standards are applied in this manual. The dioptric
powers are indicated with reference wavelength λd = 587.56 nm. For correct use, this
manual is needed. Especially, cautions for safety and operating procedures must be
thoroughly understood before using the instrument. Be sure to keep this manual together
with the instrument and read it whenever needed.
There are no user-serviceable parts inside the instrument except a printer paper and
fuses. Therefore, if you find any problems or have questions about the instrument
during operation, please contact your authorized distributor.
(This applies only to the equipments whose power source is 100/120Vac.)

Table of Contents
§
1INTRODUCTION ......................................................................................................... 1-1
1.1 Outline of the Product .............................................................................................. 1-1
1.2 Indications for use .................................................................................................... 1-1
1.3 Classification ............................................................................................................ 1-1
1.4 Symbol Information ................................................................................................. 1-2
§
2SAFETY.......................................................................................................................... 2-1
2.1 Operation .................................................................................................................. 2-1
2.2 Storage ...................................................................................................................... 2-2
2.3 Transference ............................................................................................................. 2-2
2.4 Installation ................................................................................................................ 2-3
2.5 Wiring ....................................................................................................................... 2-4
2.6 After Use .................................................................................................................. 2-4
2.7 Maintenance and Checks .......................................................................................... 2-4
2.8 Disposal .................................................................................................................... 2-5
2.9 Labels ....................................................................................................................... 2-6
§
3CONFIGURATIONS..................................................................................................... 3-1
§
4OPERATING PROCEDURES .................................................................................... 4-1
4.1 Operation Flow ......................................................................................................... 4-1
4.2 Preparation for Measurement ................................................................................... 4-1
4.3 AR (Refractive Power) Measurement ...................................................................... 4-6
4.4 PD (Pupil Distance) Measurement ........................................................................... 4-8
§
5PRINTOUT ................................................................................................................... 5-1
5.1 Printing Measurement Results ................................................................................. 5-1
5.2 Eyeprint .................................................................................................................... 5-4
§
6OTHER FUNCTIONS .................................................................................................. 6-1
6.1 System Setups .......................................................................................................... 6-1
6.2 Setting Date and Time .............................................................................................. 6-8
6.3 Entering Comments .................................................................................................. 6-9
§
7TROUBLESHOOTING ................................................................................................ 7-1
Page

§
8MAINTENANCE ........................................................................................................... 8-1
8.1 Replacing Printer Roll .............................................................................................. 8-1
8.2 Fixing a Batch of Chin Rest Paper ........................................................................... 8-3
8.3 Replacing Fuses........................................................................................................ 8-4
8.4 Cleaning the Measuring Window ............................................................................. 8-6
8.5 Cleaning Exterior ..................................................................................................... 8-7
8.6 List of Parts for Replacement ................................................................................... 8-7
§
9IC CARD SYSTEM (OPTIONAL) ............................................................................ 9-1
§
10 SPECIFICATIONS .................................................................................................... 10-1
§
11 ACCESSORIES.......................................................................................................... 11-1
11.1 Standard Accessories ............................................................................................ 11-1
11.2 Optional Accessories ............................................................................................ 11-1
APPENDIX.A Glossary ......................................................................................................... A-1
APPENDIX.B Index .............................................................................................................. B-1
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§1
INTRODUCTION
1.1 Outline of the Product
This instrument is an auto refractometer, which objectively measures the refractive power of
patient’s eyes with infrared rays to obtain spherical, cylindrical powers and cylinder axis of lens,
which may correct the patient’s vision into emmetropia.
This instrument has a main body and a measuring unit integrated on one base. On the base is a
chin rest on the patient’s side and a printer on the operator’s side, which makes an output of
measurement results. On the main body is a TV monitor, switches, and a joystick, which are
used to make alignment or manipulation. The measuring unit has a measuring window, which
the patient looks into and which the infrared rays radiate on the patient’s eye.
1.2 Indications for use
The Model AR-600 Auto Refractometer is a diagnostic instrument that is indicated for use in
the automated measurement of refractive errors of the eye.
1.3 Classification
[Classification under the provision of 93/42/EEC (MDD)] Class II a
The AR-600 is classified into Class IIa system.
[Form of protection against electrical shock] Class
The AR-600 is classified as a class I instrument.
The class I instrument is an instrument in which protection against electric shock does not
rely on basic insulation only, but which includes an additional safety precaution that provides
for connection of accessible conductive parts to a 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.
Use the power outlet which is equipped with a ground terminal.
[Degree of protection against electrical shock] Type B Applied Part
The AR-600 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)

1 - 2
[Degree of protection against ingress of liquids] IP 20
The AR-600 is classified as IP20.*1
AR-600 is a normal instrument, which is provided with an enclosure not completely waterproof.
Avoid splashing water on the instrument.
[Degree of protection against flammability]
The AR-600 is classified as an instrument not suitable to be used in a potentially flammable
environment.
Do not use near flammable materials.
[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]
Classification of AR-600: Continuous operation
1.3 Symbol Information
This symbol on the body indicates that caution should be taken.
This 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 the power is ON.
This symbol on the power switch indicates the power is OFF.
Fuse rating.
This indicates the interface connector for LENSMETER.
This indicates the interface connector for an external computer, etc.
This indicates that the instrument must be supplied only with alternating current.
This indicates the knob for adjusting contrast.
This indicates the knob for adjusting brightness.
*1 In accordance with IEC 60529

§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 CAUTION may result in serious injury under a certain
situation. Be sure to observe the instructions of CAUTION.
2.1 Operation
CAUTION
• Never disassemble nor touch the inside of the instrument.
This may result in electrical shock or instrument malfunction.
• Do not hold the power cord, but hold the mains plug to disconnect it from an outlet.
A break in the internal wire of the cord may result in a short circuit or an electric shock.
• Never put a heavy object on the power cord nor catch the cord between any objects.
The cover of the cord may get ragged and may cause a fire or electric 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.
Exchange the cord immediately.
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 such carelessness.
• Wipe between the prongs of mains plug with a dry cloth every once in a while.
If a dust settles between the prongs, the dust easily takes up moisture, and the damp
dust may cause a short circuit and a fire.
• The measured values of objective refractive power obtained by the AR-600 are intended
to be used as a reference of lens prescription for the correction of visual acuity with
spectacle or contact lenses. Manifest refraction must be used as the basis for spectacle or
contact lens prescription.

2 - 2
CAUTION
• 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 paper is fixed on the chin rest. If necessary, wipe the forehead rest and chin rest using
a cloth dampened with rubbing alcohol.
• In the event a failure occurs in the instrument, do not touch the inside of the instrument,
but remove the power cord from the outlet and contact your authorized distributor.
• Keep the measuring window away from fingerprints and dust.
The measurement accuracy may deteriorate substantially.
• Information on the avoidance of overexposure to potentially hazardous optical radiation (ISO
15004: 1997)
Spectrally weighted photochemical radiances LBand LAgive a measure of the potential that
exists for a beam of light to cause photochemical hazard to the retina. LBgives the measure
for eyes in which the crystalline lens is in place. LA gives this measure either for eyes in which
the crystalline lens has been removed (aphakes) and has not been replaced by a UV-blocking
lens or for the eyes of very young children.
The value stated for this ophthalmic instrument gives a measure of hazard potential when the
instrument is operated at maximum intensity and maximum aperture. The values of LAor LB
for the AR-600 are sufficiently low as shown on the following page.
The retinal exposure dose for a photochemical hazard is a product of the radiance and the
exposure time. For instance, at a radiance level of 1 mW/(cm2•sr), 240 min irradiation of the
dilated (8 mm diameter) pupil would cause the retinal exposure dose level to attain the
recommended exposure limit. If the value of radiance were reduced to 0.1 mW/(cm2•sr), ten
times that time (i.e. 2400 min) would be needed to reach the recommended limit. The
recommended exposure dose is based on calculations arising from theAmerican Conference
of Governmental Industrial Hygienists (ACGIH) - Threshold Limit Values for Chemical
Substances and Physical Agents (1995 - 1996 edition).
The following page shows the graph of spectrum output for the AR-600. Patients will be at
low risk of acute optical radiation with the AR-600. However, it is recommended that the
intensityoflight directedintothe patient’seyebe limited totheminimum levelwhichis necessary
for diagnosis. The total of the retinal exposure dose must be carefully watched for infants,
aphakes and persons with diseased eyes who are at greater risk when other ophthalmic
instruments with a high level of radiance are used in conjunction.

2 - 3
LA (µW/cm2/sr) 380 - 700 nm 1.158
LB (µW/cm2/sr) 305 - 700 nm 0.089
AR-630A
0
1
2
3
4
5
6
7
300 400 500 600 700 800 900 1000
波長：(nm)
放射照度：(μW/c㎡)
Irradiance:
Wavelength:
CAUTION
Spectrum output of all light source duringAR measurement (maximum light intensity)
Spectrum irradiance
*1LA: Spectrally weighted photochemical aphakic source radiance
*2LB: Spectrally weighted photochemical phakic source radiance