Huvitz HNT-1 User manual

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

2
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.
9000ENG0030-A
Ver 0.2 (2017.03.)
ⓒ2016-2017 Huvitz Co., Ltd
38, Burim-ro 170beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14055, Republic of
Korea
All rights reserved. Under copyright laws, this manual may not be copied, in whole or
in part, without the prior written consent of Huvitz Co.,Ltd.

3
HNT-1/1P
CONTENT
1. INTRODUCTION...........................................................................................................5
1.1. INTENDED USE........................................................................................................5
1.2. OVERVIEW..............................................................................................................5
1.3. CLASSIFICAITON ....................................................................................................5
2.SAFETY INFORMATION................................................................................................6
2.1. OVERVIEW..............................................................................................................6
2.2. SYMBOL EXPLANATION ............................................................................................7
2.3. ENVIRONMENTAL CONSIDERATIONS ..........................................................................9
2.4. SAFETY PRECAUTION ............................................................................................ 11
3. CHARATERISTICS .....................................................................................................15
4. NOTE FOR USE .........................................................................................................16
5. NAMES AND FUNCTIONS OF EACH PART ..............................................................18
5.1. MAIN PARTS .........................................................................................................18
5.2. EXPLANATION OF MAIN SCREEN .............................................................................21
5.2.1. Main Screen of HNT-1 ....................................................................................21
5.2.2. Main Screen of HNT-1P..................................................................................27
6. INSTALLATION OF EQUIPMENT & PREPARATION OF MEASUREMENT ...............30
7. BASIC OPERATIONS .................................................................................................32
7.1. MEASUREMENT.....................................................................................................33
7.2. MANUAL MEASUREMENT MODE..............................................................................35
7.3. AUTO MEASUREMENT MODE ..................................................................................42

4
8. OTHER MODES..........................................................................................................47
8.1. SETUP MODE ......................................................................................................47
8.2. RESULT MODE ......................................................................................................61
8.3. PACHY IMAGE MODE (ONLY IN HNT-1P)..................................................................64
8.4. ACA MODE (ONLY IN HNT-1P)...............................................................................67
8.4.1 Enlarged ACA Image Screen.........................................................................68
8.5. POWER SAVING MODE .............................................................................................69
9. MEASUREMENT ........................................................................................................70
9.1. BEFORE CALLING FOR SERVICEMAN ........................................................................70
9.1.1. Self diagnosis & Maintenance ......................................................................70
9.2. REPLACEMENT......................................................................................................72
9.2.1 Printer paper .................................................................................................72
9.2.2 Chinrest paper...............................................................................................73
9.2.3 Replacing Fuse .............................................................................................74
9.3. CLEANING.............................................................................................................74
9.4. AS CHANGING THE INSTALLATION PLACE OF THE EQUIPMENT .....................................75
10. SERVICE INFORMATION .........................................................................................76
11. MANUFACTURER.....................................................................................................77
12. EMC (ELECTROMAGNETIC COMPATIBILITY) INFORMATION ..............................78
13. SPECIFICATIONS.....................................................................................................80
14. ACCESSORIES ........................................................................................................82

5
HNT-1/1P
Introduction
1.1. Intended Use
The Non-Contact Tonometer HNT-1 is intended to be used to measure the intraocular
pressure of the human eye. HNT-1P is also provided measurement of patient’s central
corneal thickness, as well as HNT-1’s function.
1.2. Overview
The Non-Contact Tonometer HNT-1/1P is indicated for measuring intraocular
pressure to aid in the screening and diagnosis of glaucoma.
Non-contact Tonometer HNT-1/1P measured intraocular pressure of both eye by Auto
alignment function. In particular, when a lot of lights are sensed the moment that
compressed air is separated, prescription about glaucoma is possible by system that
convert time to mmHg intraocular pressure after measure microseconds.
Automatic and passivity compensation function of measurement by cornea thickness
are possible, It supply optimum intraocular pressure information.
1.3. Classificaiton
•Classification of product : Class IIa according to Annex IX (Rule 10) of the Medical
Device Directive 93/42/EEC as amended by 2007/47/EC
•Resistance against electric shock : Class I (earthed)
•Protection class against electric : Type B(Head rest, chinrest paper)
1

6
United Stateds Federal law restricts this device to the sale, distribution and use by
or on the order of an ophthalmologist or optometrist.
Safety Information
2.1. Overview
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.
2
!
WARNING
!
CAUTION

7
HNT-1/1P
“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.
2.2. Symbol Explanation
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.
I and O on power switch represent ON and OFF
respectively.
Type B Isolated patient connection.
It indicates the connection of signal input/output.
!
NOTE
!
CAUTION

8
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.
Hot surface.
Identifies the point where the system safety ground is
fastened to the chassis. Protective earth connected to
conductive parts of Class I equipment for safety purposes.
Manufacturer
Authorised Representative in the European Community
Temperature Limitation
Keep DRY
Warning: Crushing or insert of hand
UL Mark
CE Mark

9
HNT-1/1P
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%~70%.
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.

10
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.
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
Transfortation 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.

11
HNT-1/1P
2.4. Safety Precaution
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. 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 alcohol, 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 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.
4. Modifications of this equipment may only be carried out by Huvitz’s service 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
performed by Huvitz’s service technicians or other authorized persons.
6. 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.

12
7. 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.
8. 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.
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
chare 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 by 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 Tonometry
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.
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 the machine,
please power off immediately and pull out the plug.
17. 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 60601-1-1 when it comes to the electric system for

13
HNT-1/1P
medical use. Person who connects outside device with input/output signal or other
connector has the obligation to take responsibility in accordance to the IEC60601-1-1.
Contact local technician or distributor if you have doubts.
18. To avoid electrocution, this device must be connected to the supply power along with
protective grounding.
19. Do not place at a difficult location when separating cable when it comes to the device’s
placement.
20. 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.

14
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,minimum 6A,Type SJT or SVT , 18/3AWG,10A, max 3.0m long :
One end terminated with blade attachment plug(HAR) Type, NEMA 6-15P.
This equipment must be installed and operated in accordance with provided
instructions and the antenna(s) used for this transmitter must be installed to
provide a separation distance of at least 20 cm from all persons and must not be
co-located or operating in conjunction with any other antenna or transmitter. End-
users and installers must be provide with antenna installation instructions and
transmitter operating conditions for satisfying RF exposure compliance.
!
CAUTION

15
HNT-1/1P
Charateristics
1. Distance between eye and device are established automatically to measurement
position. ( Working Distance : 11mm)
2. The peak of the air pressure is automatically controlled within the range of 0 to 60
mmHg.
3. Air pressure by pressure of patient`s eye in controlled suitable.
4. With the enhanced SPC function, achieves a softer and quieter air puffing.
5. Confirm data amount and detection comparison between reference pressure and data.
6. Reduce error compensating measurement according to patient`s cornea thickness.
7. It is provides the automatic calculation function of the compensated IOP based on the
central corneal thickness.
8. Intraocular pressure of both eyes is measured by auto alignment function.
9. With auto-tracking and auto shot, HNT-1/1P allows easy and accurate measurement.
10. HNT-1P is the model combining non-contact tonometer and pachymeter in one unit.
3

16
Note for Use
1. Do not hit or drop the instrument. The instrument may be damaged by the strong
impact. The impact may damage the function of this instrument. Handle it with care.
2. The precision of measurement can be affected when the machine is exposed to the
direct sunlight or too bright indoor illumination. It is recommended to perform the
measurement in the dark optometry room.
3. If you want to use it as connecting the device to other equipment, please follow the
guidance of our local representative.
4. Sudden heating of the room in cold areas will cause condensation of vapor on the
protective glass in the measurement window and on nozzle parts inside the instrument.
In this case, wait until condensation disappears before performing measurements.
5. Make sure to keep the window in examinee side is clean at all times. In case that it
has become dirty by dusts or other substances, it can cause errors in the machine or
affect the precision of measurement.
6. In case of any presence of smoke, smell or noise during the use of machine, please
contact 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 the machine. So, please do not use them.
8. In case of moving Non-Contact Tonometer HNT-1/1P, carry it holding the lower part of
machine body with both hands as fixing the stage after switching the machine off all
the time.
9. In case of no use of the machine for a long time, please put the dust cover on the
device after powering and plugging off.
4

17
HNT-1/1P

18
Names and functions of each part
5.1. Main Parts
Safe switch for protecting patient’s eye will add in device
①LCD Touch Screen : Selectiong for measurement and function parts
②Operation Lamp : Indicates whether or not the electric power is on
③Printer : Printing the measured results
④Measurement Button : A button pressed on to measure
5
Front Part
1
2
4
5
3
7
6

19
HNT-1/1P
⑤Joystick Lever (Operation Lever) : A lever for moving object to the front and back,
left and right, and up and down
⑥Stage Fixation Lerver : A lever for fixating stage
⑦Safety Button : Safety distance establishment between patient and device
①Forehead Rest: Preventing the vibration by fixing the forehead.
②Air Nozzle: Measuring the intraocular pressure on eyes.
③Object lens for Pachy: Object lens for measuring the cornea thickness of examinees.
(only in HNT-1P)
④Chinrest: Preventing the vibration by fixing the chin.
⑤High Adjustment Mark: Adjusts the eyes` height of examinees.
⑥Power Switch: Switch for power on/off
Back Part
1
2
3
4
5
6

20
①Power Supply Socket : A socket connecting to exterior power plug
②Serial Interface (RS-232C) Connector : A terminal connecting to the exterior
equipment. When exporting the measured data to an external computer with
RS-232C connector, connect an interface cable here.
Bottom Part
2
Not Used
1