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)

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(Figure 5)
MODE：Keratometry radius measurement (mm), keratometry power measurement (D) and
average value display (AVG) optional
STEP：Keratometry power precision display
REFRACTIVE INDEX：Factory defaults to 1.3375
6.6.3 Mode setting (Figure 6)
(Figure 6)
MODE: Manual measurement mode and auto measurement mode optional (Auto
measurement icon for grey said this model without this feature)
BEEP: Sound prompt when operating. If set off, operation will keep silent
INT-M: Measurement mode selection (same as the main interface function), default startup mode
for each starting

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STAND BY: Instrument standby time setting (5 minutes, 10 minutes, 30 minutes and 60
minutes optical) (touch any key to wake up)
6.6.4 Printing setting and printing paper replacement (Figure 7)
(Figure 7)
AUTO: When ON selected, the measurement results will be printed out automatically after
the both eyes measurement finished (in this case, the data is cleared automatically)
When OFF selected, press the print key on panel to print out the measurement results.
REFRACTOMETRY: When OFF selected, the refractometry power won’t be printed out.
When STD selected, all refractometry power will be printed out. When AVG selected,
only print the average value of the refractometry power.
KERATOMETRY: When OFF selected, the keratometry power won’t be printed out. When
STD selected, all keratometry power will be printed out. When AVG selected, only
print the average value of the keratometry power.
EYE: When ON or OFF selected, the refractometry state diagram will be printed or not.
CONCENTRATION: Set the appropriate print concentration according to different thermal
printing paper.
PUPIL: When ON or OFF selected, the pupil diameter will be printed or not.
SE: When ON or OFF selected, SE data (the approximate value of cylinder power converted into
sphere power) will be printed or not.
BC: When ON or OFF selected, BC(base curve of corneal contact lens) will be printed or not.
When the printing paper is missing, the panel indicator lights flashing red, you need to
replace the printing paper (Figure8)

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(Figure 8)
8.6.5 Data setting (Figure 9)
(Figure 9)
DISP: Date, month and year display mode
DATE: Edit or modify the exact time of date and month and year
TIME: Edit or modify the exact time of second and minute and hour
COUNT: When ON or OFF selected, recording the number of patients in main interface will
be refreshed or not
No.: Patient number setting, patient measuring number setting.

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Touch DATE, TIME and NUMBER options, enter the sub menu as shown below, select the
appropriate number, press ENT key to confirm and preserve, press RETURN key to quit. Press
BS key to delete one by one, press C key to clear all. (Figure 10)
(Figure 10)
6.6.6 Printing message setting (Figure 11)
MSG1 for company name or product model number setting
MSG2 for company address or brand name setting. Users can edit this information freely
according to the exact requires. After setting, press ENTER key to preserve and quit.
(Figure 11)

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Touch the yellow blank space to enter the message editing menu (Figure 12)
(Figure 12)
ENTER key for confirming and preserving
A/a for capital/small letter conversion
BS for deleting single letter
SPA key for space bar
CRL key for clearing all letters
6.6.7 Data transfer setting (Figure 13)
(Figure 13)

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According to the requires of the connected devices, customers choose the corresponding baud
rate, and open the auto option, the measurement data will be automatically transferred to the
connected devices, meanwhile the refractometer data will be automatically cleared.
7. MEASUREMENT
Suitable crowd and contraindication
Target patients for adults and children, and crowd of eye power range (-20 m-1 ~
+20 m-1). This product is not suitable for newborn eye measurement.
7.1 Preparations before Measurement
7.1.1 Place the device on the specified instrument table, loose the stage fixing lever and
keep the device in free sliding state, adjust the four rubber feet to keep the device
in horizontal.
7.1.2 Fix and install the specified chinrest paper and printing paper separately
7.1.3 Connect the spare power line to the instrument socket tightly (ensure the local
voltage fit to the instrument specification)
7.1.4 Turn on the left side power switch (green indicator light show right in electricity
connection), the instrument goes into self-check procedures. After self-check over,
it automatically switches to main interface for measurement.
7.2 Notes for Operator and Patient
7.2.1 Adjust the chair height and screen angle in right position
7.2.2 Ensure the patient in comfortable and relaxed posture before measurement
7.2.3 By adjusting the instrument tabletop, keep the instrument height same to the patient
natural sitting posture
7.2.4 Settle patient’s chin touch the chinrest front and forehead touch the rubber forehead
rest in level (keep face parallel with the measurement window)
7.2.5 By observing the patient eyes position and height adjustment mark, press the
chinrest up/down key on panel to adjust the patient’s eyes same height to the
measurement window
7.2.6 By the operation lever, move the sliding body left and right to move the patient’s
eyes in the measurement range (if the distance of two sides asymmetrical,
adjust it by fixing the patient’s head deviation)

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7.3 Measurement
The measurement alignment method of this device for pupil and center
measurement cross target in coincidence
7.3.1 Manual focusing and measurement (7.11 and 7.12 key for M)
Hold the operation lever, quickly shift the sliding body to left side, keeping the measurement
window roughly aligning with the patient’s right eye socket. Now a yellow ring which is equal
size of the patient’s eye pupil appears on the screen (the size of the yellow ring changes with the
patient’s eye pupil) (Figure 24)
(Figure 14)
Observing the patient’s eye location on screen, rotate the operation lever (up and down
adjustment), meanwhile swing the operation lever left and right, till the yellow ring covers the
patient’s eye pupil edge, then shift the operation lever front and back, till the patient’s eye is
clearly focused in the center measurement socket (the accuracy of focusing can be confirmed by
observing the iris clarity or the four bright spots clarity) (Figure 15)
Prompt the patient to open eyes wide (eyelid and eyelash covering eyeball will affect the
measurement accuracy), both eyes look right ahead.
Slightly adjust the operation lever, till the yellow cross measurement target becomes thick and
green, press the measurement button, when the measuring light flashing (the screen refreshed in
black in moment), it shows the measurement over (the patient no need to see clearly the
object-image during measuring, the measurement result same accuracy). The measurement result
will be displayed on screen.

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(Figure 15)
Shift the sliding body to right side, repeat the above steps, measure the patient’s left eye.
Both eyes measurement over, pupil distance will be displayed automatically on the
corresponding position. Choose whether or not to print the measurement results according to
settings (auto printing or data output transmission over, the data on screen will be automatically
cleared).
7.3.2 Child measurement mode
To measure children or the patients with pupil fibrillation, select child mode (Touch 5.9
key, the right small humanoid icon becomes green). Measurement method with reference to 7.3.1
and 7.3.2. (Figure 16)

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(Figure 16)
7.3.3 Measurement error prompt
During measurement, if the patients found having eyelid ptosis, eyelash disturbance,
cataract, microcoria, keratopathy, corneal vertex and pupil center noncoincidence, the error
prompt will appear on screen when the instrument can’t measure normally, please select the
manual measurement mode or force measurement mode (long press the measurement button).
(Figure 17).
(Figure 17)
8. COMMON TROUBLE SHOOTING
8.1 Power indicator light not work
Check and confirm whether the local power fits to the instrument, whether the power plug
loose, or whether the fuse damaged (in case this happen, please replace the same specified
fuse)
8.2 Chinrest not lift
8.3 Printer can’t work regularly
Check whether the printing paper is finished (in case this happen, red indicator light on
panel will flash). Or whether the print setting is correct, and whether there is the
measurement data (no data, not print)
8.4 Sliding body not flexible
Check whether the stage fixing lever placed at right position, or whether other sundries go
into the slide slot
8.5 Press measurement button, but no data appear
Check whether the patient pupil smaller than 2mm, whether the eye position seriously
incorrect, whether the cross measurement target aligns with the patient pupil (the target
becomes thick and green), or whether the patient eyeground seriously deseased
8.6 Measurement light not work
When the measurement over, the measurement light will automatically turn off. Sway the
sliding body, it will turn on automatically
8.7 If other problems appear, please contact the local agent or original manufacturer
●If the fault phenomenon listed in the common trouble shooting can’t be resolved, please

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contact the original manufacturer or local agent to repair.
●Please provide us with the following information:
Instrument name and model number
Instrument serial number
Fault phenomenon (detailed as possible)
(1.) Accessory maintenance limitation
Providing maintenance accessories to maintain the instrument functions during the
instrument lifetime
(2.) Processing of instrument
●To be disposed carelessly of the instrument and accessories will pollute the environment
●Please contact the professional waste disposal company or local dealer before disposing
this instrument