Gilras GRK-7000 User manual

User’s Manual
Auto Ref/Keratometer GRK-7000

------------------------------------------------------------- Auto Ref/Keratometer GRK-7000 1
Notice
As this product malfunction by the electromagnetic waves originating from mobile
phones, wireless sets, remote-controlled devices, etc, please keep the machine away
from objects which can affect it.
The information in this publication has been carefully checked and is believed to b
e entirely accurate at the time of publication. GILRAS assumes no responsibility, ho
wever, for possible errors or omissions, or for any consequences resulting from the
use of the information contained herein.
Important Notice
Potential electromagnetic or other interference between medical equipme
nts and other devices being operated together in the same environment
al may expert an adverse influence on functioning of the medical equip
ment. Non-medical equipments not in compliance with the requirements
of EN 60601-1 and EN 60601-1-2 should not be used together in the sa
me environmental as the medical equipments
This equipment has been tested and found to comply with the limits for med
ical devices in IEC 60601-1-2:2001. These limits are designed to provide reaso
nable protection against harmful interferences in a typical medical installation.
Power cord
For use of equipment in rated voltage less than 125Vac, minimum 6Am Type
SJT or SVT, 18/3AWG, 10A, max 3.0m long : One end with Hospital Grade Ty
!
WARNING

2Auto Ref/Keratometer GRK-7000 -------------------------------------------------------------
pe, NEMA 5-15P, The other end with appliance coupler. For use of equipment
in rated voltage less than 250Vac, minimum 6A, Type SJT or SVT, 18/3AWG,
10A, max 1.0m long : One end terminated with blade attachment plug(HAR)
Type, NEMA 6-15P.
This product may malfunction due to electromagnetic waves caused by porta
ble personal telephones, transceivers, radio-controlled toys, etc. Be sure to av
oid having objects such as, which affect this product, brought near the produ
ct.
The information in this publication has been carefully checked and is believed
to be entirely accurate at the time of publication. GILRAS assumes no respo
nsibility, however, for possible errors or omissions, or for any consequences re
sulting form the use of the information contained herein.
GILRAS reserves the right to make changes in its products or product specificatio
ns at any time and without prior notice, and is not required to update this docum
entation to reflect such changes.
Ver. 1.0
GIlras, 9990 NW 14th St. Unit 105 Miami, FL 33172, USA
Phone: [phone], Fax: [phone]
[email protected],www.gilras.com
All rights are reserved. Under copyright laws, this manual may not be copied, in
whole or in part, without the prior written consent of GILRAS Co., Ltd.

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Contents
1. Introduction.............................................................................................................................5
1.1. Overview...................................................................................................................... 5
1.2. Classification............................................................................................................... 5
2. Safety Information................................................................................................................ 6
2.1. Overview...................................................................................................................... 6
2.2. Safety Symbol............................................................................................................ 7
2.3. Environmental Considerations................................................................................ 9
2.4. Safety Precaution.................................................................................................... 11
3. Characteristics..................................................................................................................... 14
4. Note for Use........................................................................................................................ 15
5. Names and functions of each part............................................................................. 17
5.1. Main parts................................................................................................................. 17
5.2. Explanation on Switches in Front.......................................................................20
6. Installation of Equipment & Preparation of Measurement..................................21
7. Exercise through Model Eye..........................................................................................23
8. Measurement........................................................................................................................ 27
8.1. Refractometry (REF Mode)...................................................................................29
8.1.1. Manual Measurement Mode................................................................................. 30
8.1.2. Auto Measurement Mode......................................................................................39
8.2. Keratometry (KER Mode)...................................................................................... 43

4Auto Ref/Keratometer GRK-7000 -------------------------------------------------------------
8.2.1. Manual Measurement Mode................................................................................. 43
8.2.2. Auto Measurement Mode......................................................................................47
8.3. Corneal Curvature/Refractive Power Measurement Mode (K&R Mode).. 47
8.3.1. Manual Measurement Mode................................................................................. 47
8.3.2. Auto Measurement Mode......................................................................................51
8.3.3. Diverse Indications..................................................................................................52
8.4. Measurement of Contact Lens Base Curve(CLBC Mode).............................54
8.5. Measurement of Pupil / IRIS Radius(SIZE Mode).........................................57
8.6. DISPLAY Mode........................................................................................................ 62
8.7. User SETUP Mode.................................................................................................64
8.8. Power saving Function.......................................................................................... 71
9. Self diagnosis & Maintenance.......................................................................................72
9.1. Before calling for serviceman.............................................................................. 72
9.2. Replacement............................................................................................................. 74
9.2.1. Printer paper............................................................................................................ 74
9.2.2. Chin rest paper....................................................................................................... 75
9.2.3. Replacing the Fuse................................................................................................ 76
9.3. Cleaning Equipment................................................................................................77
9.4. As changing the installation place of the equipment.................................... 77
9.5. Disposal..................................................................................................................... 77
10. Service Information............................................................................................................79
11. Main Specifications............................................................................................................80
12. Accessories.......................................................................................................................... 81

------------------------------------------------------------- Auto Ref/Keratometer GRK-7000 5
1. Introduction
1.1. Overview
Auto Ref/Keratometer GRK-7000 is the equipment to provide the information o
f Spherical, Cylindrical and Axis while measuring the refraction of examinee’s e
yes. Auto Ref/Keratometer GRK-7000 is the equipment that can measure the c
orneal curvature of examinee. In addition, it can measure PD (=distance in bet
ween pupils) and pupil size.
CLBC (Contact Lens Base Curve) measurement is also a basic function of this
product.
1.2. Classification
Classification of product: 2nd Grade Medical Instrument
Resistance against electric shock: Class I (earthed)
Protection class against electric: Type B
- Protection against harmful ingress of water : Ordinary . IPX0
- Degree of safety in the presence of a flammable anesthetics mixture with
air or with oxygen or with nitrous oxide: Not suitable for use in the pre
sence of a flammable anesthetics mixture with air or with oxygen or with
nitrous oxide. Mode of operation : continuous

6Auto Ref/Keratometer GRK-7000 -------------------------------------------------------------
2. Safety Information
2.1. Overview
Safety is everyone’s responsibility. The safe use of this equipment is largely dep
endent upon the installer, user, operator, and maintainer. It is imperative that p
ersonnel study and become familiar with this entire manual before attempting t
o install use, clean, service or adjust this equipment and any associated accesso
ries. It is paramount that the instructions contained in this manual are fully und
erstood and followed to enhance safety to the patient and the user/operator. It
is for this reason that the following safety notices have been placed appropriat
ely within the text of this manual to highlight safety related information or info
rmation requiring special emphasis. All users, operators, and maintainers must b
e familiar with and pay particular attention to all Warnings and Cautions incorp
orated herein.
"Warning” indicates the presence of a hazard that could result in severe
personal injury, death or substantial property damage if ignored.
NOTE
"Note” describes information for the installation, operation, or maintenanc
e of which is important but hazard related if ignored.
“Caution” indicates the presence of a hazard that could result in minor i
njury, or property damaged if ignored.
!
WARNING
!
CAUTION

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2.2. Safety Symbol
The International Electrotechnical Commission (IEC) has established a set of sym
bols for medical electronic equipment which classify a connection or warn of an
y potential hazards. The classifications and symbols are shown below.
I and O on power switch represent ON and OFF r
espectively.
Type B Isolated patient connection
It indicates the connection of signal input/output.
This symbol identifies a safety note. Ensure you u
nderstand the function of this control before usin
g it. Control function is described in the appropri
ate User’s or Service Manual.
It indicates the year of manufacture and the man
ufacturer.
It indicates the safe ground point connected to th
e chassis of equipment. It is required to do the p
rotective ground to the conductive section in the
equipment of class I for the purpose of safety.
Disposal of your old appliance
1. When this crossed-out wheeled bin symbol is attached to a

8Auto Ref/Keratometer GRK-7000 -------------------------------------------------------------
product it means the product is covered by the European Dire
ctive 2002/96/EC
2. All electrical and electronic products should be disposed of s
eparately form the municipal waste stream via designated colle
ction facilities appointed by the government or the local author
ities.
3. The correct disposal of your old appliance will help prevent
potential negative consequences for the environment and hum
an health
4. For more detailed information about disposal of your old ap
pliance, please contact your city office, waste disposal service or
the shop where you purchased the product.
Alternation Current

------------------------------------------------------------- Auto Ref/Keratometer GRK-7000 9
2.3. Environmental Considerations
Please avoid the environment below for the operation and storage of the equip
ment.
Where the equipment is exposed to water vapor.
Don’t operate the equipment with wet hands.
Where the machine is exposed directly to the sunli
ght.
Where the temperature changes frequently (Normal tempe
rature for operation of the machine is at the range of 10
C ~ 35C, and the humidity is at the range of 30%~90%.
Where any heaters are at the close distance to the machin
e.
Where the humidity is high and there are problems to the heat dis
sipation and/or ventilation.
Where the equipment is subject to excessive shocks or
Vibrations.

10 Auto Ref/Keratometer GRK-7000 -------------------------------------------------------------
Where the machine can be exposed to the chemi
cal or flammable substances.
Please keep the equipment out of dust and do n
ot let inserted any metal parts such as coins, clip
s, etc.
Do not disassemble or open the machine. The manufac
ture shall have no responsibility for any problems cause
d by these.
Do not close the thermal ventilation outlet.
D o no t co n n e c t t h e A C p ow e r pl u g i n
to th e outl e t whil e not put t i n g t h e p
a r t s of m ac h i n e to g e t h er c om p l e te l y. I
t c a n h a r m t h e e q u i p me n t .
Do not pull the plug out of outlet while holding the cord.
For the normal operation of the machine,
please keep the ambient temperature is 10℃ ~ 35℃, humidity is 30%~90%, an
d atmospheric pressure is 800 ~ 1060 hPa.
For the transportation of the machine,
please keep the ambient temperature is -40℃ ~ 70℃, humidity is 10%~95%,
and atmospheric pressure is 500 ~ 1060 hPa.

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For the storage of the machine,
please keep the ambient temperature is -10℃ ~ 55℃, humidity is 10%~95%,
and atmospheric pressure is 700 ~ 1060 hPa.
Avoid environments where the equipment is exposed to excessive shocks or vibr
ations.
2.4. Safety Precaution
This equipment has been developed and tested in conformity with domestic & i
nternational safety standards and regulations, which guarantees the high stability
of this product. This guarantees a very high degree of safety for this device. T
he legislator expects us to inform the user expressively about the safety aspects
in dealing with the device. The correct handling of this equipment is imperativ
e for its safe operation. Therefore, please read carefully all instructions before s
witching on this device. For more detailed information, please contact our Custo
mer Service Department or one of our authorized representatives.
1. This equipment must not be used (a) in an area that is in danger of ex
plosions and (b) in the presence of flammable, explosive, or volatile solv
ent such as alcohol, benzene or similar chemicals.
2. The device should neither be kept nor installed in the place with high h
umidity. For the optimal operation, the humidity should be at the range
of 30%~90%. The machine should not be exposed to the place where
water splashes, drips or sprays. Do not place containers containing fluids,
liquids, or gases on top of any electrical equipment or devices
3. The equipment must be operated only by, or under direct supervision of
properly trained and qualified person/s.

12 Auto Ref/Keratometer GRK-7000 -------------------------------------------------------------
4. Modifications of this equipment may only be carried out by GILRAS’s ser
vice technicians or other authorized persons.
5. Customer maintenance of this equipment may only be performed as stat
ed in the User’s Manual and Service Manual. Any additional maintenance
may only be performed by GILRAS’s service technicians or other authori
zed persons.
6. The manufacturer is only responsible for effects on safety, reliability, and
performance of this equipment when the following requirements are ful
filled: (1) The electrical installation in the respective room corresponds to
the specifications stated in this manual and (2) This equipment is used,
operated and maintained according to this manual and Service Manual.
7. The manufacturer is not liable for damage caused by unauthorized tamp
ering with the device(s). Such tampering will forfeit any rights to claim u
nder warranty.
8. The equipment may only be used together with accessories supplied by
GILRAS’s. If the customer makes use of other accessories, use them only
if there are usability under technical safety aspects has been proved an
d confirmed by GILRAS or the manufacturer of the accessory.
9. Only persons who have undergone proper training and instructions are a
uthorized to install, use, operate, and maintain this equipment.
10. User’s manual or service manual should be kept in the place where the
persons in chare of operation and maintenance can access easily any ti
me.
11. Do not force cable connections. If a cable does not connect easily, be s
ure that the connector (plug) is appropriate for the receptacle (socket). If

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you cause any damage to a cable connector(s) or receptacle(s), let the
damage(s) be repaired by an authorized service technician.
12. Please do not pull on any cable. Always hold on to the plug when disc
onnecting cables.
13. This equipment may be used for the international application related to
Refractometry according to this manual.
14. Before every operation, proceed with visual inspection on the equipment
exterior to seek any mechanical damage(s) to ensure the proper functio
ning.
15. Do not obstruct any ventilation outlet for proper heat dissipation.
16. In case of any presence of smoke, spark or abnormal noise/smell from t
he machine, please power off immediately and pull out the plug.

14 Auto Ref/Keratometer GRK-7000 -------------------------------------------------------------
3. Characteristics
1. It is possible to measure the refractive power and corneal curvature with
one(1) set of the machine: Refractometry and Keratometry
2. As the measurement range of refractive power is wide from-20D to +20
D, it can measure the severe myopia.
3. As measuring the curvature, it can measure by Ø2.0mm of least pupil ra
dius.
4. The fogging technique which is applied to the internal fixed target is to
make the more accurate measurement possible while letting the eyes of
patient at the natural and comfortable state.
5. It is possible to select the display type of Refractometry and Keratometr
y.
6. It is possible to measure the distance in between pupils (PD).

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4. Note for Use
1. Do not hit or drop the instrument. The instrument may be damaged on
the strong impact. The impact may damage the function of this instrume
nt. Handle it with care.
2. The precision of measurement can be affected when the machine is expo
sed to the direct sunlight or too bright indoor illumination. It is recomm
ended to perform the measurement in the dark optometry room.
3. If you want to use it as connecting the device to other equipment, pleas
e follow the guidance of our local representative.
4. Sudden heating of the room in cold areas will cause condensation of va
por on the protective glass in the measurement window and on optical
parts inside the instrument. In this case, wait until condensation disappea
rs before performing measurements.
5. Make sure to keep the lens in examinee side is clean at all times. In cas
e that it has become dirty by dusts or other substances, it can cause err
ors in the machine or affect the precision of measurement.
6. In case of any presence of smoke, smell or noise during the use of mac
hine, please contact to our local representative after plugging it off from
the socket (outlet).
7. If you clean the surface of the equipment with organic solvents such as
alcohol, thinner, benzene, etc, it can damage to the machine. So, please
do not use them.
8. In case of moving GRK-7000, carry it holding the lower part of machine
body with both hands as fixing the stage after switching the machine off

16 Auto Ref/Keratometer GRK-7000 -------------------------------------------------------------
all the time.
9. In case of no use of the machine for a long time, please put the dust c
over on the device after powering and plugging off. .

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5. Names and functions of each part
5.1. Main parts
[Figure 1. Front]
1. Height Adjustment Mark:Adjusts the eyes’ height of examinees
2. Operation Buttons:Selecting of functions
柠3. Operation Lamp :Indicates whether or not the electric power is on
4. Display Monitor: Monitor for measurement
5. Measurement Button:Performing the measurement by pressing it after focusing.
6. Operation Lever:Adjusting the focus by moving to the directions of forward/backward, left
/right, up and down.
7. Print Button : Printing the results of measurement.
8. Printer:Printing the measured results
9. Stage Fixing Lever:Fixing the Upstage of system.

18 Auto Ref/Keratometer GRK-7000 -------------------------------------------------------------
[Figure 2. Back Section]
1. Forehead Rest:Preventing the vibration by fixing the forehead
2. Measuring Object Lens: Measuring the image imaging on the retina of eyes.
3. Chin Rest:Preventing the vibration by fixing the chin
4. Power Switch:Switch for power on/off
5. Chin-rest Adjusting Lever:Adjusting the up and down position of Chin-rest.

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[Figure 3. Bottom Section]
NOTE
As connecting to exterior monitor, noises can appear on the monitor owi
ng to the length or kind of cable, and the quality of monitor.
1. Power Supply Socket: A socket connecting to exterior power plug
2. Serial Interface Connector: A terminal connecting to the exterior equipment
3. Clamping Bolt:Fixing the system stage