Nidek Medical ARK-700 Series User manual

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Auto Ref/keratometer operation manual
ARK-700

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Contents
Import Notice
Environmental Factors
Safety Information
1. General Description
2. Features
3. Notes for using the instrument
4. Description of Parts
5. Instruction of screen
6. Menu
7. Measurement
8. Removal of usual fault and service informaion
9. Inspection and Maintenance
10. Specifications

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WARRANTY
Please use Auto Ref-keratometer after you read the manual carefully.
It is not allowed to add the any factors which will be caused machine problem .
This manual contains information necessory for correct and effective operation of
Auto Ref-keratometer and provides specifications and procedures for operation and
maintenance。
Please keep this manual and read if whenever necessory.
Environmental Factors
Please do not use at hot and humid place.
Normal operation temperature range is from 10 to 40℃and humidity is from 30%
to 75%
Do not use chemical detergents for cleaning the dirt on the case.
Do not give the shock and open the case without any purpose.
General Safety information：
If you see any warnings or cautions printed on the warning labels, please follow the
safety instruction in this manual. Ignoring such cautions or warnings while handling the
products may result in injury or accident. Be sure to read and fully understand the
manual before using this products. Keep this manual in easy to access place.
Caution sign
DESCRIPTION
Warning
This indicates a potentially hazardous situation which could result in death or
serious injury to you or others.
CAUTION
This indicates hazardous situation which may result in minor injury to you or
others, or may result in machine damage.
Note
This is used to emphasize essential inforamtion. Be sure to read this
information to avoid incorrect operation.

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Caution sign
DESCRIPTION
WARNING
Only operate the instrument with the power supply indicated on the stick.
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 swith,,
unplug the power cable from the AC outlet and contact the dealer or agent
who/where you purchase this instrument：
1、When there smoke, strange odor or abnormal sound；
2、When liquid has been spilled into the instrument or metal object has entered
through opening；
3、When the product has been dropped or its housing damaged.
CAUTION
This instrument is shipped with a groungding 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 place his/her hand and 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 other a different examinee uses it, in order to prevent infection.
CAUTION
Change the chin rest paper each time when 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.

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1、General Description
ARK-700 auto ref/keratometer consists of main body,model eye, printer
paper,power cable,Dust cover, Operation manual and Fuse.
[1]Main body:1 , [5]Dust cover:1,
[2] Model eye:1, [6]Fuse:2,
[3]Printer paper:2, [7]Operation manual:1。
[4]power cable:1,
2、Features
◆Various Measurements Supported
Not only refractometry and keratometry but aslo base cave of contact lens and
corneal diameter can be measured with this instrument.
◆Wide measurement range
Because ARK-700 covers from -30Dto +25D in refractometry and from R5mmto
R10mm in keratometry, almost of all examinee can be measured.
◆Accurate mesurement
With the foggy method of eye fixation target making the eye comfortable, you can
measure more accurately
◆Auto-Starting Function
As soon as auto ref/keratometer is properly aligned to each eye, this function initiates
the measurement process and generates the measurement reslus automatically.
◆High Resolution Color LCD Monitor
High Resolution Color LCD monitor 0.3 Mega Pixel 7 inchs Color TFT LCD
Provides Fine and Large Lris Image with color alignment marks.
3、Notes for using the Instrument
◆Do not give the shock or drop the instrument. If the instrument receives a strong
shock,the function of this instrument may be damaged. Handle with care.
◆Do not use this instrument in the sunlight or bright indoor lightm the bright lights can
influence the result of measurements.
◆Do not use chemical solution such as thinner,alcohol,benzene,etc. for cleaning the
dirt on the case.It may damage the instrument

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◆In the case of sudden heating of the room in cold areas, wait until the thermal shock
disappears before measurement.
◆Consult the dealer to connect this instrument with other equipment
◆Keep the optical parts of the examinee side clean. A fingerprint or other substances
on the optical parts may cause an error or inaccurate results.
◆If there is noise, smoke or strange odors while working, disconnect the power supply
and consult the dealer
◆In moving this instrument,fix the stage with the clamping bolt after remove power
code,then lift the bottom of this instrument with both hands.
◆When you do not use this instrument for a long period, turn off the power and take
the dust off from cover on this instrument.
◆Before the other instrument is connected to this instrument in RS232C port, please
check that the instrument to be connected has the safety certification marks.If not, the
function of this instrument maybe damaged.
4、Description of Parts
1.Monitor screen（to displays measurement results）
2.Measurement（to start measurement）
3.Operation Stick（for alignment and focusing）
4.Button（for printing）
5.Printer（to print measurement results）
6.Lock switch（for stop the body moving）
7.Power switch（to turn power on/off）
8.Power supply connector（to connect to the power
cable）
9.Clamping bolt(to lock the stage to the base)
10.Fuse（to protect the instrument from the excess
electric power& shock）
11.RS232C Interface connector（connector for other
instrument）
12.RS232C Interface connector（connector for other
instrument）Chinrest（to place examinee’s chin on it）
13.Measurement window（for examinee to look into
the target image for measurement）
14.Chinrest（to place examinee’s chin on it）
15.Knob（chinrest manual up/down）
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1
2
3
6
5
7

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Operation Buttons
①②③
④
①Print button（to print out the measured results）
②Indicator lamp（indicate the power on/off and the printer paper exist/no）
③Paper perforating key(press the key to print out the measurement result)
④Up and down chinrest(Adjust the height of the chinrest)
Marks: For the point ③and ④,haven not add these function now. The button keeps for
next new model.

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5、Screen display
1、Place Auto re/keratometer on the table.
（Figure 1）
5.1 L/R Sign: Flashing sign indicates the current measured eye
5.2 The number of power/corneal parameters measured
5.3 Step selection (shortcut key)
5.4 Astigmatism symbol selection (shortcut key)
5.5 VD selection (shortcut key)
5.6 PD value display
5.7 Power display
5.8 Corneal value display
5.9 Adult//child mode selection
5.10 Measurement mode selection
5.11 Auto/manual measurement selection (partial model)
5.12 Auto/manual tracking and focusing selection (partial model)
5.13 Data clear key
5.14 Data record check
5.15 Menu set
5.16 Pupil alignment target
5.17 Left/right eye pupil diameter

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6、Menu
（Figure 2）
6.1 Measurement Mode Selection
Touch this key to pop up three measurement mode menu (as shown in Figure 2), the user
can choose to touch any measurement mode menu under need (KER for Keratometry
mode, R/K for RefracKeratometry mode, REF for Refractometry mode)
5.2 Auto/Manual Measurement Selection (partial model)
Touch this key to select auto measurement mode (A) or manual measurement mode (M)
5.3 Auto/Manual Tracking and Focusing Selection (this model do not have this function)
Touch this key to select auto tracking and focusing mode (AF) or manual tracking and
focusing mode (MF)
5.4 Data Clear Key
Touch this key to clear the measurement data
5.5 Data Record Check
Touch this key to check the measurement data (directly print out the data, the
measurement data won’t be recorded)( Figure 3)
（Figure 3）

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Left/right eyes data can be recorded max.10 items separately. Touch REF to display the
recorded refractometry data only, touch KER to display the recorded keratometry data
only, touch CLEAR key to clear the recorded data, touch RETURN key to return to the
measurement interface.
6.6 Menu Set
Touch menu set key to enter the subsidiary menu setting (Current selection for blue)
6.6.1 Refractometry parameters setting (Figure 12)
VD: Distance between corneal and back top focus of lens, 0.0mm (contact lens), 12.0mm
(Asian), 13.5mm (Middle East), 15.0mm (European)
CYL: Astigmatism symbol selection, －、＋、±(Mix)
STEP：Measurement data precision selection
FOGG: Visual guide target atomization function switch (position of guiding target
atomization)
(Figure 4)
6.6.2 Keratometry parameters setting (Figure 5)