Huvitz HT-5000 User manual

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User’s Manual
Applanation Tonometer HT-5000

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IMPORT 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..
Ver 1.0
© 2004 - 2011 –Huvitz Co..Ltd.
-689-3, Gumjeong-dong,Gunpoci, Gyeonggi-do
435-862,Republic of Korea
All rights are reserved. Under copyright laws, this manual may not be copied, in whole or
in part, without prior written consent of HUVITZ Co.,Ltd.

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Contents
1. Safety Infomation ....................................................................................................5
1.1. Introduction…………………………………………………………………………5
1.2. Safety symbols ………………………………………………………………6
1.3. Environmental Considerations.......................................................................8
1.4. Safety (Note for Use)...................................................................................10
2. Product Description ..............................................................................................14
2.1. Introduction.………………………………………………………………………14
2.2. Pressure Measurement Method………………………………………………..14
2.3. Operation and Storage Condition………………………………………………16
2.4. Configuration……………………………………………………………………..17
2.5. Basic Unit………………………………………………………………………....18
3. Installation.............................................................................................................19
3.1. Product Installation……………………………………………………………….19
4. Operation the Equipment......................................................................................21
4.1. Preparation before Using………………………………………………………..21
4.2. Equipment Control and Battery Replacement………………………………...23
4.3. Correct Measurement……………………………………………………………28
4.4. Tips for Measurement……………………………………………………………39
4.5. Astigmatism……………………………………………………………………….40

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5. Maintenance...........................................................................................................41
5.1. Applanation Tonometer HT-5000 Check……………………………………….42
6. Cleaning / Disinfection of Prism...........................................................................44
6.1. Disinfection of Prism……………………………………………………………..44
6.2. Accessories Disinfection…………………………………………………….......45
7. Technical Standard................................................................................................46
8. EMC information....................................................................................................48
9. Service Information..................................................................................................52

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1. Safety Information
1.1 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
Cautions incorporated herein.
1. CAUTION
Please pay attention to this word.
!
CAUTION

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2. Product Classification
※This product is medical device
1) CE- Regulatin MDD 93/42/EEC ; Class Im (measuring functions)
2) FDA –Class ll
3) KFDA –Class ll
3. Intended Use: Use for glaucoma diagnosis.
1.2 Safety Symbols
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.
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 described in the
appropriate User’s or Service Manual.
It indicates the year of manufacture and the
manufacturer.
Manufacturer
Authorised Representative in the European
Community
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.

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Temperature Limitation
Keep DRY
UL60601-1
CAN/CSA
C22.2
NO.601.1
MEDICAL EUIPMENT
WITH RESPECT TO ELECTRIC SHOCK
FIRE AND MECHANICAL HAZARDS
ONLY IN ACCORDANCE WITH
UL 60601-1, AND
CAN/CSA C22.2 NO.601.1
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.
4. 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.

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1.3 Environmental Considerations
Please avoid the environment below for the operation and storage of the
equipment.
Where the equipment is exposed to water vapor.
Don’t operate the equipment with wet hands.
Where the machine is exposed directly to the
sunlight.
Where the temperature changes frequently (Normal
temperature for operation of the machine is at the
range of 10C ~ 40C, and the humidity is at the
range of 30%~75%.
Where any heaters are at the close distance to the
machine.
Where the humidity is high and there are problems to
the heat dissipation and/or ventilation.
Where the equipment is subject to excessive shocks
or
Vibrations.

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Where the machine can be exposed to the chemical
or flammable substances.
Please keep the equipment out of dust and do not
let inserted any metal parts such as coins, clips, etc.
Do not disassemble or open the machine. The
manufacture shall have no responsibility for any
problems caused by these.
Do not close the thermal ventilation outlet.

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1.4 Safety (Note for Use)
1. This product can use only glaucoma diagnosis.
2. Applanation Tonometer must be used only through people to a medical
treatment relation occupation.
3. Applanation Tonometer could be Transfortation / Storage / Operation
from this environment.
4. Ambient condition
Transportation
Temperature : -40 °C ~ +70 °C
Air Pressure : 500 hPa ~ 1060 hPa
Humidity : 10% ~ 95%
Storage
Temperature : -10 °C ~ +55 °C
Air Pressure : 700 hPa ~ 1060 hPa
Humidity : 10% ~ 95%
Operation
Temperature : +10 °C ~ +40 °C
Air Pressure : 800 hPa ~1060 hPa
Humidity : 30% ~ 90%
5. Installation, Dispatch
-To avoid condensation, allow the instrument to adjust to
roomtemperature several hours before unpacking.
-The Applanation Tonometer should be verified for damage after
unpacking.
-The maintenance according to “After use custody and

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management method”.
-Check : do the connection pieces fit (tonometer on slit lamp,
measuring prism).
-Defective equipment should always be returned in an appropriate
packaging.
6. Operation, Environment
-The instrument may be operated by qualified and trained staff.
Training is the responsibility of the user.
-Only HUVITZ accessories may be used.
-Must be satisfied with operational condition of using environment.
7. Cleaning body
-Use only a cloth that has been moistened slightly and if
necessary a little soap.
-No fluids, abrasive mediums or caustic substances may be used.
-The instrument is not to be sprayed.
8. Guareantee and third-party product liability
-Instrument and accessories are produced from high-quality
materials using the most modern methods. They have left our
factory in a faultless condition. Nevertheless, if you should have
any complaints, please consult your representative.
-The manufacturer grants a guarantee on the instrument. For
information regarding guarantee conditions, please refer to your
local huvitz representative. The manufacturer guarantee covers
breakdowns and defects that are caused by materials and design.
Breakdowns and defects that are caused by improper use or
outside influences are excluded from the guarantee.
-Should non-authorised persons handle the instrument then all
guarantee liabilities are null and void. Should the instrument be

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used although damaged through incorrect use then this can lead
to injury to persons. In this case the manufacturer rejects all
liability.
9. Do not examine in case of eye infections or injured corneas.
-There is no contraindication for performing tonometry. Medical
assessment is necessary and due care is to be exercised.
10. Do not use damaged measuring prisms.
-Prior to each use, the contact surface of the measuring prism
must be checked for contamination or damage (scratches, cracks
or sharp edges.) This must be carried out using the slit lamp
microscope at a 10 to 16 x magnification. When found to be
damaged, the measuring prism may no longer be used to avoid
damage to the patient’s cornea.
-Disinfectant can penetrate into cracks in the measuring prism and
lead to chemical burns on the patient’s eye during tonometry.
11. Period of use
-Due to the large number of variables to be taken into account
(type and concentration of the disinfectants used, number of
patients, handling etc.) it is practically impossible to make a
statement as to how often and/or how long a measuring prism
can be safely used. HUVITZ measuring prism recommends a
maximum service life of two years before the expiry date. This
service life applies subject to normal conditions of use, i.e., in
compliance with the instructions contained in this manual for use.
The period of use begins with the first application. The given time
periods are not valid for damaged measuring prisms, they must
be immediately replaced.

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2Product Description
2.1 Introduction
Applanation Tonometer HT-5000 is made for measuring intraocular pressure
and It can assemble to HUVITZ Slit lamp(HS-5000). Applanation Tonometer HT-
5000 can assemble another slit lamp. Must be used only through people to a
medical treatment relation occupation.
2.2 Pressure Measurement Method
The Applanation Tonometer functions according to the 'Goldmann method'.
The measuring of the pressure required to maintain a uniform applanation of
the surface of the cornea.
The Corneal is applanated by feeler arm with measuring prism. The diameter of
contact surface diameter of measuring prism is 7.0 mm. The corner of the
measuring prism is made roundly.
Measuring prism is contacted to patient’s eyes according to forward movement
of slit lamp.
Increase measurement knob until prism applanation surface becomes
ø = 3.06 mm (area = 7.354 mm2)
According to ISO 1000, pressure is N(Newton), mN(milli Newton)
Display value
Force
Pressure
10
9.81mN
1.33kPa≒10mmHg
The measurement of the flattened surface is made directly on the cornea. The

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built-in duplication system in the measuring prism divides the image and
displaces the two semi circular halves from each other by 3.06 mm.
Before measuring, it will be necessary to anesthetise the cornea locally, to
place a strip of fluorescein paper in the conjunctival sac and switch on the blue
filter of the slit lamp. The inner border of the ring represents the line of
demarcation between the cornea flattened by applanation and the cornea not
flattened.
The major advantage of applanation tonometry is the small bulbus deformation
which amounts to only 0.56 mm3. The values found by this method of tonometry
are only slightly influenced by scleral-rigidity and radius of corneal curvature, the
intraocular tension increases by about 2.5% only.
The principle of applanation tonometry is simple. The careful construction of
the apparatus is a guarantee of its continued correct performance. Nevertheless,
in order to obtain exact results, the method of use indicated must be strictly
followed. The readings obtained are based on the assumption that a cornea with
a 'normal' thickness is being measured, alteration of the corneal thickness leads
to changes in the measured IOP. A 'normal' corneal thickness is considered to be
within the area of 530 to 560 microns.

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2.3 Operation and Storage Condition
1. Storage
-Temperature : –10˚C ~ +55˚C
-Air Pressure : 700 hPa ~ 1060 hPa
-Humidity : 10% ~ 95%
2. Operation Condition
-Temperature : +10˚C ~ +40˚C
-Air Pressure : 800 hPa ~ 1060 hPa
-Humidity : 30% ~ 90%

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2.4 Configuration
1. Measuring prism : Part for contacting to patient’s cornea
2. Feeler arm : Part for locking up the measuring prism
3. Control weight insertion : Part for connecting the weight bar
4. Control drum : The IOP is measured by rotating control drum
5. Connection arm : Part for installing the tonometer to slit ramp
6. Adapter : Part for fixing the tonometer to slit ramp
7. Weight bar : For verification of equitment, the mark is indicated to 0, 20,
60 mmHg position
8. Manufacturing label
9. Function button : Function button is used for power on / off or function
control
10. Battery cover : The alkaline battery is stored inside the battery cover (1.5V
x 4)
11. Digital display(FND) : The IOP is displayed.

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2.5 Basic Unit
This product supplied in the condition which is packed packing. Take out a
product from packing and must check the next parts.
-Applanation Tonometer HT-5000 body
-Connection arm
-Weight bar
-Measuring prism (2EA)
-User’s manual

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3Installation
This product be supplied packing condition which be stand various transportation and
standard storage condition. If product be defected, must be called immediately to the
HUVITZ.
3.1 Product Installation
1. When install on the slit lamp of another company product, must confirm
the part which is assembled of equipment.
2. When assembles Applanation Tonometer, need the mount adapter with
screw.
①Unscrew the set screw to be found above and in the middle of the
cylinder body of the microscope.
②Position the mounting base for the tonometer and tighten the set
screw.
③When don’t use this product, please turn rightward.
!
CAUTION

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