Huvitz CRK-1 User manual

Service Manual
Auto Ref/Keratometer CRK-1

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 1
Precautions
This product may malfunction due to the electromagnetic wave that is generated fro
m mobile phone, two-way radio, machinery controlled wireless and others. Do not pla
ce any device that may affect this product nearby.
We believe that the contents of this user manual are accurate in overall since they
were reviewed carefully. However, Shanghai Huvitz does not assume any kind of res
ponsibility for the latent mistake or omission that results from the use of information i
ncluded in this user manual.
Shanghai Huvitz has the right to make any kind of modification to this product or pr
oduct specs anytime without prior notice and modification may not be renewed on thi
s document.

2Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------
Ver. 1.0(2019.07)
Shanghai Huvitz Co., Ltd.
Building 1, No. 150, Renjie Road, Fengxian, Shanghai, 201401, China.
All rights reserved.
Under copyright laws, this manual may not be copied, in whole or in part, without the prior
written consent of Shanghai Huvitz Co., Ltd

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 3
Contents
1. Important Notice............................................................................................................................................................................5
2. Safety Information.........................................................................................................................................................................6
2.1. Introduction............................................................................................................................................................................ 6
2.2. Safety Symbol.......................................................................................................................................................................7
2.3. Environmental Considerations.........................................................................................................................................10
2.4. Safety Precaution...............................................................................................................................................................12
3. Product Outline........................................................................................................................................................................... 14
3.1. Nomenclature...................................................................................................................................................................... 14
3.2. Optical System................................................................................................................................................................... 18
3.3. Electrical System................................................................................................................................................................22
3.4. Mode Setting.......................................................................................................................................................................30
3.5. Principles of Measurement..............................................................................................................................................31
4. Repair Standard...........................................................................................................................................................................35
4.1. Checking and Control.......................................................................................................................................................35
4.2. Auto Tracking Setup..........................................................................................................................................................53
4.3. Pupil distance calibration (PD Setup).......................................................................................................................... 56
4.4. Factory Data Setup...........................................................................................................................................................59
4.5. Color Test............................................................................................................................................................................ 60
4.6. Touch Setup........................................................................................................................................................................ 61
4.7. DPC (Dead Pixel Correction) Setup.............................................................................................................................63
4.8. IQC mode............................................................................................................................................................................65

4Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------
4.9. Software upgrade...............................................................................................................................................................66
5. Disassembly and Assembly Procedure.............................................................................................................................. 68
5.1. Removing the Cover.........................................................................................................................................................68
5.2. Disassembling the Moving Base Assy......................................................................................................................... 70
5.3. Disassembling the Front-Cover-Assy (LCD-Assy)......................................................................................................71
5.4. Disassembling the OPTICAL HEAD ASSY.................................................................................................................73
5.5. Disassembling the MAIN FRAME ASSY..................................................................................................................... 74
6. Troubleshooting........................................................................................................................................................................... 76
7. Technical Materials.....................................................................................................................................................................82

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 5
1. Important Notice
Potential electromagnetic or other interference between medical equipments
and other devices being operated together in the same environmental may
expert an adverse influence on functioning of the medical equipment. Non-
medical equipments not in compliance with the requirements of EN 60601-1
should not be used together in the same environmental as the medical eq
uipments
This equipment has been tested and found to comply with the limits for medical devices
in IEC 60601-1:2001. These limits are designed to provide reasonable protection against
harmful interference in a typical medical installation
Power Cord
For use of equipment in rated voltage less than 125Vac, minimum 6A, Type SJT or SVT,
18/3AWG, 10A, max 3.0m long: One end with Hospital Grade Type, NEMA 5-15P other
end with appliance coupler. For use of equipment in rated voltage less than 250Vac,min
imum 6A,Type SJT or SVT, 18/3AWG, 10A, max 3.0m long : One end terminates with bl
ade attachment plug (HAR) Type, NEMA 6-15P.
This product may malfunction due to electromagnetic waves caused by portable personal
telephones, transceivers, radio-controlled toys, etc. Be sure to avoid having objects such
as, which affect this product, brought near the product.
The information in this publication has been carefully checked and is believed to be entir
ely accurate at the time of publication. Shanghai Huvitz assumes no responsibility, howev
er, for possible errors or omissions, or for any consequences resulting from the use of th
e information contained herein.
Shanghai Huvitz reserves the right to make changes in its products or product specificati
ons at any time and without prior notice, and is not required to update this documentatio
n to reflect such changes.
!
WARNING

6Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------
2. Safety Information
2.1. Introduction
Safety is everyone’s responsibility. The safe use of this equipment is largely dependent u
pon the installer, user, operator, and maintainer. It is imperative that personnel study and
become familiar with this entire manual before attempting to install use, clean, service or
adjust this equipment and any associated accessories. It is paramount that the instructio
ns contained in this manual are fully understood and followed to enhance safety to the p
atient and the user/operator. It is for this reason that the following safety notices have be
en placed appropriately within the text of this manual to highlight safety related informatio
n or information requiring special emphasis. All users, operators, and maintainers must be
familiar with and pay particular attention to all Warnings and Cautions incorporated herei
n.

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 7
"Warning,” indicates the presence of a hazard that could result in severe person
al injury, death or substantial property damage if ignored.
NOTE
"Note,” describes information for the installation, operation, or maintenance of w
hich is important but hazard related if ignored.
“Caution” indicates the presence of a hazard that could result in minor injury, or
property damaged if ignored.
2.2. Safety Symbol
The International Electro technical Commission (IEC) has established a set of symbols
!
WARNING
!
CAUTION

8Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------
for medical electronic equipment, which classify a connection or warn of any potential
hazards. The classifications and symbols are shown below.
I and O on power switch represent ON and OFF respectively.
Type B Isolated patient connection
This symbol identifies a safety note. Ensure you understand the
function of this control before using it. Control function is descr
ibed in the appropriate User’s or Service Manual.
Manufacturer
(Fabricant)
It indicates the year of manufacture and the manufacturer.
Authorised Representative in the European Community
(Représentant autorisé dans la Communauté européenne)
It indicates the safe ground point connected to the chassis of e
quipment. It is required to do the protective ground to the cond
uctive section in the equipment of class I for the purpose of saf
ety.
Temperature Limitation
(Limitation de température)
Keep DRY
(Garder au sec)
Disposal of your old appliance
1. When this crossed-out wheeled bin symbol is attached to a pro
duct it means the product is covered by the European Directive 20
02/96/EC.
2.All electrical and electronic products should be disposed of separ
ately from the municipal waste stream via designated collection faci
lities appointed by the government or the local authorities.
3. The correct disposal of your old appliance will help prevent p
otential negative consequences for the environment and human hea

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 9
lth.
4. For more detailed information about disposal of your old applian
ce, please contact your city office, waste disposal service or the sh
op where you purchased the product.
Alternating Current
Warning: Crushing or insert of hand
(Attention: écrasement ou insertion de la main)
CE Mark
(Marque CE)
CE for RoHS
RoHS Directive Compliance 2011/65/EU
(CE pour RoHS
Conformité à la directive RoHS 2011/65 / UE)
Atmospheric pressure limitation
(Limitation de pression atmosphérique)
Humidity limitation
(Limite d'humidité)
Stack direction
(Direction de la pile)
Fragile , handle with care
(Fragile, manipuler avec soin)
Keep away from sunlight
(Tenir à l'écart de la lumière du soleil)
Stack layer limitation
(Limiter la couche de pile)

10 Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------
Use no hooks
(N'utilisez aucun crochet)
Consult instructions for use
(Consulter les instructions d'utilisation)
COM Connector cable Symbol
(COM Connector cable Symbole)
Serial Number Symbol
(Symbole du numéro de série)
2.3. Environmental Considerations
Please avoid the environment below for the operation and storage of the equipment.
Where the equipment is ex
posed to water vapor.
Don’t operate the equipmen
t with wet hands.
Where the machine ca
n be exposed to the c
hemical or flammable s
ubstances.
Where the machine is e
xposed directly to the su
nlight.
Please keep the equip
ment out of dust and
do not let inserted any
metal parts such as c
oins, clips, etc.
Where the temperature c
hanges frequently (Norm
al temperatur
e for operation of the m
achine is at the range of
10C ~ 35C, and the
humidity is at the range
of 30%~70%.
Do not disassemble or o
pen the machine. The m
anufacture shall have no
responsibility for any prob
lems caused by these.

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 11
Where any heaters are at t
he close distance to the m
achine.
Do not close the thermal
ventilation outlet.
Where the humidity is high
and there are problems to
the heat dissipation and/or
ventilation
Do not connect the AC
power plug into the o
utlet while not putting t
he parts of machine to
gether completely. It ca
n harm the equipment.
Where the equipment is
subject to excessive sho
cks or Vibrations.
Do not pull the plug o
ut of outlet while holdi
ng the cord.
For the normal operation of the machine, please keep the ambient temperature is 10℃~
35℃, humidity is 30% ~ 75% and atmospheric pressure is 800 ~ 1060hpa. For the Tran
sformation of the machine, please keep the ambient temperature is -40℃~ 70℃, humidi
ty is 10% ~ 95% and atmospheric pressure is 500 ~ 1060hpa. For the Storage of the m
achine, please keep the ambient temperature is -10℃~ 55℃, humidity is 30% ~ 75% a
nd atmospheric pressure is 700 ~ 1060hpa. Avoid environments where the equipment is
exposed to excessive shocks or vibrations.

12 Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------
2.4. Safety Precaution
This equipment has been developed and tested in conformity with domestic & internationa
l safety standards and regulations, which guarantees the high stability of this product. Thi
s guarantees a very high degree of safety for this device. The legislator expects us to inf
orm the user expressively about the safety aspects in dealing with the device. The correc
t handling of this equipment is imperative for its safe operation. Therefore, please read c
arefully all instructions before switching on this device. For more detailed information, plea
se contact our Customer Service Department or one of our authorized representatives.
1. This equipment must not be used (a) in an area that is in danger of explosions
and (b) in the presence of flammable, explosive, or volatile solvent such as alco
hol, benzene or similar chemicals.
2. The device should neither be kept nor installed in the place with high humidity.
For the optimal operation, the humidity should be at the range of 30%~75%. The
machine should not be exposed to the place where water splashes, drips or spr
ays. Do not place containers containing fluids, liquids, or gases on top of any el
ectrical equipment or devices
3. The equipment must be operated only by, or under direct supervision of properly
trained and qualified person/s.
4. Modifications of this equipment may only be carried out by Shanghai Huvitz’s ser
vice technicians or other authorized persons.
5. Customer maintenance of this equipment may only be performed as stated in the
User’s Manual and Service Manual. Any additional maintenance may only be pe
rformed by Shanghai Huvitz’s service technicians or other authorized persons.
6. The manufacturer is only responsible for effects on safety, reliability, and perform
ance of this equipment when the following requirements are fulfilled: (1) The elec
trical installation in the respective room corresponds to the specifications stated i

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 13
n this manual and (2) This equipment is used, operated and maintained accordin
g to this manual and Service Manual.
7. The manufacturer is not liable for damage caused by unauthorized tampering wit
h the device(s). Such tampering will forfeit any rights to claim under warranty.
8. The equipment may only be used together with accessories supplied by Shangha
i Huvitz’s. If the customer makes use of other accessories, use them only if ther
e are usability under technical safety aspects has been proved and confirmed by
Shanghai Huvitz or the manufacturer of the accessory.
9. Only persons who have undergone proper training and instructions are authorized
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 charge of operation and maintenance can access easily any time.
11. Do not force cable connections. If a cable does not connect easily, be sure that
the connector (plug) is appropriate for the receptacle (socket). If you cause any
damage to a cable connector(s) or receptacle(s), let the damage(s) be repaired b
y an authorized service technician.
12. Please do not pull on any cable. Always hold on to the plug when disconnecting
cables.
13. This equipment may be used for the international application related to Refractom
etry and Keratometry 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 functioning.

14 Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------
15. Do not obstruct any ventilation outlet for proper heat dissipation.
In case of any presence of smoke, spark or abnormal noise/smell from the machine, ple
ase power off immediately and pull out the plug.
3. Product Outline
3.1. Nomenclature
1. Head Rest: Preventing the vibration by fixing the head
2. Stage fixation lever : for fixating stage
3. Power indicator Lamp: Indicates whether or not the electric power is on
4. Display Monitor: Monitor for measurement
5. Printer : printer for printing out measurement results
6. Measurement Button: Performing the measurement by pressing it after focusing
7. Joystick (Operation lever) : lever for moving object lens to the front, back, left, r
ight, up and down

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 15
1. Forehead rest: location for placing the forehead to prevent test subject from mo
ving the face (Type B attachment part)
2. Measuring window: object lens for measuring the image that is formed in the ey
e retina
3. Chin rest: location for placing the chin to prevent test subject from moving the f
ace
(Chin rest paper: Type B attachment part)
4. Chin rest control knob: the chin rest’s height adjustment knob
5. Measuring head: Optical head of mearing.
6. Eye height mark of measuring window: indicates the position of the measuring
window.

16 Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------
1. Power supply socket (Fuse holder): Socket that connects with the outside power plug
(250V T3.15AL)
2. Serial interface connector: Connector for connecting outside device connector
3. RGB connector: Connector for connecting with the outside monitor of the RGB method
4. Power switch: switch for turning the power on or off
5. Clamping bolt: Fixate system stage
NOTE
Noise may appear on the screen when connecting with outside monitor due to the length a
nd type of the cable, and monitor quality.

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 17
Use signal amplifier if the distance with the outside monitor is significant.

18 Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------
3.2. Optical System

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 19
List of Optical Components
Patient’s eye
2-1, -2: LED for lightening cornea
3-1, -2: Ring unit of the Keratometry
4-1: White LED
4-2: Blue LED
5: Objective lens
6: Half mirror
7: Relay lens
8: IR filter (K measurement)
9: Imaging lens
10: TV camera (K/C)
11: Half mirror
12: Reflection mirror
13: Relay lens
14: Imaging lens
15: Fixation chart
16: Illumination LED
17: Rotary Prism
18: Hole mirror
19: Relay lens
20: Relay lens
21: Ring aperture