Potec PRK-8000 User manual

OPERATION MANUAL
AUTO REF-KERATOMETER PRK-8000
Revision1.0
www.potec.biz
2016.10 Before using the instrument, be sure to read this manual thoroughly.

- i -
IMPORTANT NOTICE
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 entirely
accurate at the time of publication. POTEC assumes no responsibility, however, for possible
errors or omissions, or for any consequences resulting from the use of the information
contained herein.
Upon request, circuit diagrams, component part lists, descriptions, calibration instructions, or
other information will be provided to assist service personnel to repair parts of the equipment
that are designated by POTEC as repairable by service personnel.
POTEC reserves the right to make changes in its products or product specifications at any
time and without prior notice, and is not required to update this documentation to reflect such
changes.
© 2016 POTEC Co., Ltd.
40-4, Techno 2-ro, Yuseong-gu, Daejeon, 34015 Korea
All rights reserved.
Under copyright laws, this manual may not be copied, in whole or in part, without the prior written
consent of POTEC.

- ii -
SAFETY INFORMATION
Accessory equipment connected to the analog and digital interfaces must be certificated
according to the respective IEC standards (e.g. IEC 60950-1 for data processing equipment
and IEC 60601-1 for medical equipment). Furthermore all configurations shall comply with
the system standard EN 60601-1:2006, Clause 16. Everybody who connects additional
equipment to the signal input part or signal output part configures a medical system, and is
therefore responsible that the system complies with the requirements of the system standard
IEC 60601-1:2005, Clause 16. If in doubt, consult the technical service department or your
local representative.
For U.S.A
Do not make any changes or modifications to the equipment unless otherwise specified in the
manual.
If such changes or modifications should be made, you could be required to stop operation of
the equipment.
For EU Countries
The following mark, the name & address of the EU Representative shows compliance of the
instrument with Directive 93/42/EEC.
EU Representative:
Medical Device Safety Service GmbH
Schiffgraben 41, D-30175
Hannover, Germany

- iii -
Symbols marked on the Instrument
Symbol Description
TYPE BApplied Part
~ Alternating current
Protective earth (ground)
Refer to operating instructions
O Off (power: disconnect to the mains)
I On (power: connection to the mains)
Do not place your hand or fingers between the stage and base. Also
ensure that the examinee does not place his/her hand or fingers there
either. Otherwise, hand or fingers may be hurt.
Disposal of your old appliance
zWhen this crossed-out wheeled bin symbol is attached to a
product it means the product is covered by the European Directive
2002/96/EC.
zAll electrical and electronic products should be disposed of
separately from the municipal waste stream via designated
collection facilities appointed by the government or the local
authorities.
zThe correct disposal of your old appliance will help prevent
potential negative consequences for the environment and human
health.
zFor more detailed information about disposal of your old
appliance, please contact your city office, waste disposal service
or the shop where
y
ou purchased the product
General Safety Information
If you see any warnings or cautions printed on the warning labels, follow the safety
instructions in this manual. Ignoring such cautions or warnings while handling the product
may result in injury or accident. Be sure to read and fully understand the manual before using
this product.
Keep this manual in easy-to-access place.
Meaning of Caution Sign
Caution Sign Description
WARNING
This indicates a potentially hazardous situation which could results in
death or serious injury to you or others.
CAUTION
This indicates hazardous situations which may result in minor injury to
you or others, or may result in machine damage.
This is used to emphasize essential information. Be sure to read this
information to avoid incorrect operation.
NOTE

- iv -
WARNING
Only operate the instrument with the power supply indicated on the
rating plate. Otherwise, it may result in fire or electric shock.
WARNING
Be sure to turn OFF the power switch before connecting or
disconnecting the cables. Also, do not handle them with wet hands.
Otherwise, you may get an electric shock that may result in death or
serious injury.
WARNING
Never disassemble or modify this instrument because it may result in
fire or electric shock. Also, since this instrument incorporates high-
voltage parts and other hazardous parts, touching them may cause
death or serious injury.
WARNING
Should any of the following occur, immediately turn OFF the power
switch, unplug the power cable from the AC outlet, and contact the
dealer or the agent who/where you purchase this instrument.
zWhen there is smoke, strange odor or abnormal sound.
zWhen liquid has been spilled into the instrument or a metal object
has entered through an opening.
zWhen the product has been dropped or its housing damaged.
WARNING
To avoid the risk of electric shock, this equipment must only be
connected to supply mains with protective earth.
CAUTION
This instrument is shipped with a grounding type power cable.
To reduce the risk of electric shock, always plug the cable into a
grounded power outlet.
CAUTION
Ensure that the examinee has not placed his/her hand or fingers under
the chin rest. Otherwise, hand or fingers may be hurt.
CAUTION
Wipe the forehead rest with ethanol or glutaraldehyde solution to
disinfect it each time a different examinee uses it, in order to prevent
infection.
CAUTION
Change the chin rest paper each time the examinee changes in order
to keep the chin rest clean.
CAUTION
Do not place your hand or fingers between the stage and base. Also
ensure that the examinee does not place his/her hand or fingers there
either. Otherwise, hand or fingers may be hurt.
CAUTION
Do not use the device simultaneously with other electronic equipment
to avoid electromagnetic interference with the operation of the device.
CAUTION
Do not use the device near, on, or under other electronic equipment to
avoid electromagnetic interference with the operation of the device.
CAUTION
Do not use the device in the same room with other equipment such as
life-support equipment, other equipment that has major affects on the
life of patient an results of treatment , or other measurement or
treatment equipment that involve small electric current.
CAUTION
Do not use the device simultaneously with portable and mobile radio
frequency communication systems because it may have an adverse
effect on operation of the device.
CAUTION
Do not use cables and accessories that are not specified for the device
because that may increase the emission of electromagnetic waves
from the device or the system and decrease the immunity of the device
to electromagnetic disturbance.

- v -
CAUTION
Do not position the equipment to make it difficult to operate the
disconnection device. (Appliance coupler or separable plug)
CAUTION
Do not placed the multiple socket-outlet for PRK-8000 system on the
floor in order to prevent liquid penetration and damage to the product.
CAUTION
PRK-8000 system shall not be connected with additional multiple
socket-outlets or extension cords in addition to a designated single
multiple socket-outlet.
CAUTION
Maximum permissible load of each socket-outlet used for the PRK-
8000 system, shall not be less than 100VA.
CAUTION
If non-medical electrical equipments (e.g. Video monitor, IT equipment,
etc.) that are connected with the PRK-8000 are, directly connected to
the wall socket-outlets, high touch current may flow since the earth
continuity is not ensured.
CAUTION
Multiple socket-outlet should be a grounding-type . and complied with
IEC 60884-1.
CAUTION
Connection of the plug shall be possible only by using the tool.
(Refer to the figure below.)

PRK-8000 Operation Manual
CONTENTS
IMPORTANT NOTICE ····················································· ⅰ
SAFETY INFORMATION ················································· ⅱ
1. Features ··································································· 1
2. Notes for Using the Instrument ········································· 2
3. Description ································································3
3.1 Main Unit ···························································································· 3
3.2 Operation Panel ····················································································· 5
3.3 Rotating the Monitor ············································································· 6
4. Practicing through Model Eye ········································· 7
5. Measurement ······························································ 9
5.1 Continuous Keratometry and Refractometry [K/R Mode] ··································· 10
5.2 Refractometry [REF Mode] ······································································ 15
5.3 Keratometry [KER Mode] ········································································ 17
5.4 Contact Lens Base Curve Measurement [CLBC mode] ····································· 19
5.5 Peripheral Keratometry [K(P) Mode] ···························································· 20
6. Other Modes ································································23
6.1 Semi-Auto Eye Tracking ······································································· 23
6.2 Measuring Cornea Diameter [SIZE Mode] ···················································· 24
6.3 Observe image obtained by Retroillumination [ILLUM Mode] ··························· 27
6.4 DISPLAY Mode ·················································································· 30
6.5 SETUP Mode ······················································································· 31
7. Self Inspection and Maintenance ······································· 38
7.1 Before Calling a Service Person ································································· 38
7.2 Replacement ······················································································· 40
7.3 Cleaning ···························································································· 40
7.4 When Moving the Instrument ··································································· 40
7.5 Service Information ················································································ 41
8. Classifications and Specifications ····································· 42
8.1 Classifications ····················································································· 42
8.2 Specifications ······················································································· 43
9. Components ······························································ 44

PRK-8000 Operation Manual
- 1 -
1. Features
(1) Various Measurements Supported
Not only the usual refractometry and keratometry, but also corneal diameter and base
curve of contact lens can be measured with this one instrument. Thus, measurements
of eye and prescriptions for glasses and contact lenses can be made more efficiently.
(2) Wide Dioptric Measurement Range
Because the PRK-8000 covers a wide measurement range, from -30D to +25D, even an
examinee with strong myopia can be measured.
(3) More Accurate Measurement
You can measure more accurately because foggy method of the eye fixation target
makes the examinee’s eye comfortable.
(4) Pupil Distance(PD) can be measured.
(5) Customized Specifications
You can change the measurement modes, delete unnecessary modes, and/or change
order for printing results. By rotating the monitor, you can see the screen from multiple
directions.
(6) User-friendly operation features
You can easily operate the product with touch screen.
(7) Easy Connection with Other Equipments
This instrument is designed to connect other equipments using RS-232 or USB
communication..
(8) External VGA Monitor Display Supported
You can connect VGA monitor for the external display
(9) Economic printing mode
Letter size and arrangement, depending on the mode of printing adjusted to the paper,
can be saved.
(10) Eye image save function
Eye images (Identified in the ILLUM mode) are stored on your PC through USB
communication.
* Special PC application and USB drivers are provided.
(11) Semi-Auto Eye Tracking
Detect the pupil position of the patient and automatically adjusts the height of the
measuring head.

PRK-8000 Operation Manual
- 2 -
2. Notes for Using the Instrument
(1) Do not hit or drop the instrument. The instrument may be damaged if it receives a
strong impact. The impact can damage the function of this instrument. Handle with
care.
(2) Exposure to the direct sunlight or too bright indoor lights can influence on the result of
accurate measurement.
(3) If you want to connect this with other equipments, consult the dealer.
(4) Sudden heating of the room in cold areas will cause condensation on the protective
glass in the measurement window and on optical parts inside the instrument. In this
case, wait until condensation disappears before performing measurement.
(5) Keep clean the objective glass of the examinee side. If it is stained with other
substance, it may effect on error or inaccurate measurements.
(6) Don’t press the “TOUCH BUTTON” on LCD monitor by nail or sharp object. It may
make scratch on the surface of LCD.
(7) Disconnect the power supply and consult the dealer in case there is smoke, strange
odor or noise on working.
(8) Don’t use organic solution such as alcohol, thinner, benzene, etc. to clean the surface
of this instrument. It may damage the instrument.
(9) When moving this PRK-8000, fix the stage by using stage holding knob, always check
if the power supply is off, and then lift the bottom of the unit with both hands.
(10) If you leave PRK-8000 without using for certain period, disconnect the power supply
and protect the unit with dust cover.
(11) Giving an excessive force when rotating the monitor may cause a malfunction.