Huvitz HNT-1 / 1P User manual

Service Manual
Non-Contact Tonometer HNT-1 / 1P

-------------------------------------------------------------------------------------------------- Non-Contact Tonometer HNT-1/1P 1
M2ARAA-17-00004(Rev.B)
(2018.06.01)
© 2016 - 2017 Huvitz Co., Ltd.
38, Burim-ro 170beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14055, Republic of Korea
Huvitz has the copyright to this document.
Parts or all of this user manual cannot be duplicated without Huvitz’s permission in accordance
to the copyright law.

2 Non-Contact Tonometer HNT-1/1P ------------------------------------------------------------------------------------------------
Contents
1. Important Notice................................................................................................................... 3
2. Safety Information ................................................................................................................ 4
3. Product Outline................................................................................................................... 15
3-1. Main Parts.................................................................................................................15
3-2. Optical System.......................................................................................................... 18
3-3. Electrical System...................................................................................................... 21
3-4. Measurement Flow...................................................................................................26
4. Repair Standard .................................................................................................................29
4-1. Checking and Control............................................................................................... 29
4-2. Disassembly and Assembly Procedure.................................................................... 49
5. Troubleshooting.................................................................................................................. 58

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1. 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. Huvitz assumes no responsibility, however, for possible
errors or omissions, or for any consequences resulting from the use of the information
contained herein.
Huvitz 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.

4 Non-Contact Tonometer HNT-1/1P ------------------------------------------------------------------------------------------------
2. Safety Information
2.1. Introduction
Safety is everyone’s responsibility. The safe use of this equipment is largely dependent upon 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 instructions contained in this manual are fully understood 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 appropriately within the text of this manual to highlight safety related
information or information requiring special emphasis. All users, operators, and maintainers must be
familiar with and pay particular attention to all Warnings and Cautions incorporated herein.
“Warning” indicates the presence of a hazard that could result in severe personal injury, death or
substantial property damage if ignored.
“Note” describes information for the installation, operation, or maintenance of which 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.
!
WARNING
!
NOTE
!
CAUTION

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2.2. Symbol Explanation
2.2.1. Safety Symbol and Indication
The International Electrotechnical Commission (IEC) has established a set of symbols for medical
electronic equipment which classify a connection or warn of any potential hazards. The classifications
and symbols are shown below.
Symbol
Indication
This symbol identifies a safety note. Ensure you understand the function of
this control before using it. Control function is described in the appropriate
User’s or Service Manual.
(Ce symbole identifie une note de sécurité.Assurez-vous de comprendre la
fonction de ce contrôle avant de l'utiliser. La fonction de contrôle est décrite
dans le manuel d'utilisation ou d'entretien approprié.)
I and O on power switch represent ON and OFF respectively.
(O sur l'interrupteur d'alimentation représentent
respectivement ON et OFF.)
Temperature Limitation
(Limitation de température)
Atmospheric pressure limitation
(Limitation de pression atmosphérique)
Humidity limitation
(Limite d'humidité)
Stack direction
(Direction de la pile)
Keep DRY
(Garder au sec)
Fragile , handle with care
(Fragile, manipuler avec soin)
Keep away from sunlight
(Tenir àl'écart de la lumière du soleil)
Stack layer limit
(Limiter la couche de pile)

6 Non-Contact Tonometer HNT-1/1P ------------------------------------------------------------------------------------------------
CE Mark
(Marque CE)
Use no hook
(N'utilisez aucun crochet)
WEEE Symbol –EU only
Disposal of your old appliance
When this crossed-out wheeled bin symbol is attached to
a product it means the product is covered by the European
Directive 2002/96/EC.
All 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.
The correct disposal of your old appliance will help prevent
potential negative consequences for the environment and
human health. For more detailed information about disposal of
your old appliance, please contact your city office, waste
disposal service or the shop where you purchased the product.
(Symbole WEEE- EU seulement
Mise au rebut de votre ancien appareil
Lorsque ce symbole de poubelle barrée est joint àun produit,
cela signifie que le produit est couvert par la directive
européenne 2002/96 / CE.
Tous les produits électriques et électroniques doivent être
éliminés séparément du flux des déchets municipaux via des
installations de collecte désignées par le gouvernement oules
autorités locales. L'élimination correcte de votre ancient
appareil aidera àprévenir les conséquences negatives
potentielles sur l'environnement et la santéhumaine.
Pour plus d'informations sur l'élimination de votre ancient
appareil, veuillez contacter votre mairie, le service
d'élimination des déchets ou le magasin oùvous avez acheté
le produit.)
Authorized representative in the European Community –EU
ONLY
(Représentant autorisédans la Communautéeuropéenne-
EU seulement)
Manufacturer
(Fabricant)
Date of manufacture
(Il indique l'année de fabrication et le fabricant.)
COM Port
(Port COM)

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Input power & FUSE rating
(Puissance d'entrée et indice FUSE)
Consult instructions for use
(Consulter les instructions d'utilisation)
Type B Isolated patient connection
(Type B Connexion patient isolée.)
Warning: Crushing or insert of hand
(Attention: écrasement ou insertion de la main)
QR code
(QR code)
Alternating Current
(Courant alternative)

8 Non-Contact Tonometer HNT-1/1P ------------------------------------------------------------------------------------------------
2.2.2. Safety Symbol location
[Front View of HNT-1(P)]
[Bottom side of HNT-1(P)]
[Package Box]

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2.3. Environmental Considerations
Please avoid the environment below for the operation and storage of the equipment.
A place where the equipment can be exposed to water.
Do not operate the equipment with wet hand.
A place where the equipment can be exposed to direct sunlight.
A place where the equipment can be exposed to direct ultraviolet.
Where the temperature changes frequently (Normal temperature for
operation of the machine is at the range of 10C ~ 35C, and the
humidity is at the range of 30%~90%.
A place nearby a heating apparatus.
A place where the equipment can be exposed to water.
Do not operate the equipment with wet hand
A place where the equipment can be exposed to excessive pressure or
vibration.
A place where the equipment can be exposed to chemical substances
or flammable gas.
Watch out for dust, especially metal pieces from entering the
equipment.
Do not disassemble the product.
Huvitz will not be held responsible for any negligence regarding such
action.

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Do not close the thermal ventilation outlet
Do not connect the AC power adapter before all parts are fully
assembled. It can lead to a malfunction.
Always pull the power cord holding the plug and not the cord.
For the normal operation of the machine, please keep the ambient temperature is 10℃~ 35℃, humidity
is 30% ~ 90% and atmospheric pressure is 800 ~ 1060hpa. For the Transportation of the machine, please
keep the ambient temperature is -40℃~ 70℃, humidity is 10% ~ 95% and atmospheric pressure is 500
~ 1060hpa. For the Storage of the machine, please keep the ambient temperature is -10℃~ 55℃,
humidity is 10% ~ 95% and and atmospheric pressure is 700 ~ 1060hpa. Avoid environments where the
equipment is exposed to excessive shocks or vibrations.

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2.4. Safety Precaution
BEFORE USE, READ THIS MANUAL
The safety precautions and operating procedures must be thoroughly understood prior to
operation of the device.
This equipment has been developed and tested in conformity with domestic & international safety
standards and regulations, which guarantees the high stability of this product. This guarantees a very
high degree of safety for this device. The legislator expects us to inform the user expressively about the
safety aspects in dealing with the device. The correct handling of this equipment is imperative for its
safe operation. Therefore, please read carefully all instructions before switching on this device. For more
detailed information, please contact our Customer Service Department or one of our authorized
representatives.
1. Light Hazard Group I (according to the ISO15004-2)
This device is classified as a Group I. The LED used for the device is safe under expected use.
However, observe the following precautions when using the device.
-Do not direct LED beams to human eyes when unnecessary.
-Do not look into the objective lens for a prolonged time.
-If the device cannot be used appropriately or any problem cannot be solved, Stop using the
devcie immediately, and contact Huvitz or your authoirzed distributor
-
2. Do not touch directley if an operator has a hand injury or a significant allergic reaction to the material
used in the operaton contact part.
Part Name
Material
LCD Touch pannel
Glass
Joystick / button
ABS + Silicon, Spray
Power switch
PC + PA66
Safety button
A6061 T6, SILVERANODIZING
Cover
ABS
Printer cover
ABS
Chin Rest
ABS
3. This equipment must not be installed (a) in an area that is in danger of explosions and (b) in the presence
!

12 Non-Contact Tonometer HNT-1/1P ------------------------------------------------------------------------------------------------
of flammable, explosive, or volatile solvent such as alcohol, benzene or similar chemicals.
4. 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.
5. 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%~90%. The machine should not be exposed to the place
where water splashes, drips or sprays.
6. Do not install the device in an eviroment where cotaminants such as corrosive gas, acid, or salt is
containedin the air.
7. Do not place the substance or material on the top of the device.
8. In case of any presence of smoke, spark or abnormal noise/smell from the machine, please power off
immediately and pull out the plug.
9. As this device use lithium battery, the reckless abandon of the machine itself or the lithium battery can
cause the environmental pollution. Please contact to the professional waste disposal company.
10.When disposing of the device and / or part, follow local regulations for disposal and recycling.
11.The equipment must be operated only by a, or under direct supervision of properly trained and qualified
person/s such as ophthalmologist.
12.Modifications of this equipment may only be carried out by Huvitz’s service technicians or other
authorized persons.
13.Be sure to check the safety distance before measurement. If the safety distance is not secured, may
touch and injury the patient’s eye.
14.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 performed by Huvitz’s service technicians or
other authorized persons.
15.The manufacturer is only responsible for effects on safety, reliability, and performance of this equipment
when the following requirements are fulfilled: (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.
16.The manufacturer is not liable for damage caused by unauthorized tampering with the device(s). Such
tampering will forfeit any rights to claim under warranty.
17.The equipment may only be used together with accessories supplied by Huvitz’s. If the customer makes
use of other accessories, use them only if there are usability under technical safety aspects has been
proved and confirmed by Huvitz or the manufacturer of the accessory.
18.Only persons who have undergone proper training and instructions are authorized to install, use, operate,
and maintain this equipment.
19.User’s manual or service manual should be kept in the place where the persons in chare of operation

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and maintenance can access easily any time.
20.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 by an authorized service technician.
21.Please do not pull on any cable. Always hold on to the plug when disconnecting cables.
22.External equipment intended for connection to signal input, signal output or other connectors, shall
comply with relevant IEC Standard (e.g., IEC60950 for IT equipment and IEC60601-1 series for medical
electrical equipment). In addition, all such combination-system-shall comply with the standard IEC60601-
1 harmonized national standard or the combination. If, in doubt, contact qualified technician or your local
representative the operator should not touch the patient and accessible male parts of the SIP/SOP
connectors simultaneously.
23.Before every operation, proceed with visual inspection on the equipment exterior to seek any mechanical
damage(s) to ensure the proper functioning.
24.Do not obstruct any ventilation outlet for proper heat dissipation.
25.In case of any presence of smoke, spark or abnormal noise/smell from the machine, please power off
immediately and pull out the plug.
26.IEC standard needs to be satisfied with in order to connect an outside device with input/output signal or
other connector. (IT equipment is IEC 60950, and electric equipment for medical use is IEC 60601).
Moreover, all the systems need to satisfy the safety requirement, IEC 60601-1 when it comes to the
electric system for medical use. Person who connects outside device with input/output signal or other
connector has the obligation to take responsibility in accordance to the IEC60601-1. Contact local
technician or distributor if you have doubts.
27.To avoid electrocution, this device must be connected to the supply power along with protective
grounding.
28.Do not place at a difficult location when separating cable when it comes to the device’s placement.
29.When you carry this product, please hold on left and right bottom of the product. If you want the product
to be installed on another place, please call A/S center.
30.Do not measure an eye whose cornea is easily damaged due to corneal disease or surgery.
31.When instrument is send back to A/S center for repair or maintenance, or before authorized service man is arrived at
the place for repair or maintenance, wipe the surfaces of the instrument (especially, the parts that come into contact
with the patient) with a clean cloth dampened with rubbing alcohol

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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, NEMA5-15P 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 3.0m long : One end terminated with blade attachment plug(HAR)
Type, NEMA6-15P. –Apply for the device in the North America, Do not apply for the device in the
EU
Safety is everyone’s responsibility. The safe use of this equipment is largely dependent upon
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 instructions contained in
this manual are fully understood 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
appropriately within the text of this manual to highlight safety related information or information
requiring special emphasis. All users, operators, and maintainers must be familiar with and pay
particular attention to all Warnings and Cautions incorporated 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 maintenance of which
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.
!
WARNING
!
CAUTION
!
CAUTION

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3. Product Outline
3-1. Main Parts
1. LCD Touch Screen: Selectiong for measurement and function parts
2. Operation Lamp: Indicates whether or not the electric power is on
3. Printer: Printing the measured results
4. Measurement Button: A button pressed on to measure
5. Joystick Lever (Operation Lever): A lever for moving object to the front and back, left and
right, and up and down
6. Stage Fixation Lerver: A lever for fixating stage
7. Safety Button: Safety distance establishment between patient and device

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1. Forehead Rest: Preventing the vibration by fixing the forehead.
2. Air Nozzle: Measuring the intraocular pressure on eyes.
3. Object lens for Pachy: Object lens for measuring the cornea thickness of examinees. (only
in HNT-1P)
4. Chinrest: Preventing the vibration by fixing the chin.
5. High Adjustment Mark: Adjusts the eyes` height of examinees.
6. Power Switch: Switch for power on/off

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1. Power Supply Socket: A socket connecting to exterior power plug
2. Serial Interface Connector: A terminal connecting to the exterior equipment.

18 Non-Contact Tonometer HNT-1/1P ------------------------------------------------------------------------------------------------
HNT-1
3-2. Optical System
○
6
①
②
②
③④⑤
③
④
④
⑤
○
e
○
7
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8
○
9
○
10
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11
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12
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13
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14
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15
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16
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17
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18
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19
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19
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20
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21
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22

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3-2-1. List of Optical Components
No.
Name
Function
○
1
Ext. LED
To illuminate eye for Observation Channel
○
2
App. LED
To measure the working distance(Z axis)
To measure the IOP
○
3
Aiming LED
To illuminate eye for detecting of eye center
○
4
Fixation LED
To illuminate the fixation target
○
5
Pachy. LED
To measure for the CCT(Central Cornea Thickness)
○
6
Air nozzle
Air Puffing nozzle
○
7
Aiming Mirror
To reflect the aiming LED to the Eye
○
8
Objective Lens
To image the Eye to the observation camera
○
9
Fix. Mirror
To reflect the fixation LED and Pachy. LED
○
10
Image Lens
To image the Eye to the observation camera
○
11
Observation Camera
The camera for the Observation channel
○
12
Signal Lens
To gather the applanation signal to the PD sensor
○
13
PD Mirror
To reflect the applanation signal to the PD sensor
○
14
PD Sensor
To detect the applanation signal
○
15
Psd Lens
To gather the reflection signal from the eye to the PSD sensor
○
16
Psd Sensor
To detect the working distance
○
17
Fixation Pinhole
○
18
Pachy. Prism
To reflect the fixation LED and to penetrate the Pachy. LED
○
23
○
24
○
25