Huvitz HRK-1 User Manual
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Huvitz HRK-1 User Manual

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HRK-1
USER MANUAL

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March 12, 2025

Can this unit be calibrated and is so, need instructions

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Summary of Contents for Huvitz HRK-1

  • Page 1 Auto Ref/Keratometer HRK-1 USER MANUAL...
  • Page 2 Huvitz has the right to make any kind of modification to this product or product specs anytime without prior notice and modification may not be renewed on this document.
  • Page 3 HRK-1 CAUTION Provision of information on the avoidance of light hazard from the optical device is required in ISO 15004-2:2007 “Ophthalmic instruments-Fundamental requirements and test methods” 1. The manufacturer shall, on request, provide the user with a graph showing the relative spectral output of the instrument between 305 nm and 1 100 nm when the instrument is operating at maximum light intensity and maximum aperture.

  • Page 4: Table Of Contents

    CONTENT 1. Introduction..........................6 1.1. Intended Use ............................... 6 1.2. Equipment overview ............................6 1.3. Grade classification and mentioned items ......................6 2. Information regarding safety ....................... 7 2.1. Introduction ................................7 2.2. Safety indication ..............................8 2.3. Environment related matters..........................9 2.4.
  • Page 5 HRK-1 9.4. DISPLAY mode ..............................54 9.5. User SETUP mode ............................... 56 9.5.1. List of setup items & Initial ..............................56 9.5.2. Initial setting ..................................... 56 9.5.3. Detailed description of setting ............................... 58 9.6. Input method ................................. 63 10. Self-diagnosis and maintenance/repair ................... 65 10.1.

  • Page 6: Introduction

    Introduction 1.1. Intended Use The Auto Ref/Keratometer HRK-1 is intended to be used to measure the refractive power of the eye. 1.2. Equipment overview Automatic eye examination refractive power measurement device, HRK-1 is the equipment that measures refractive power of patient’s eyeball to show Sphere (SPH), Cylinder (CYL) and Axis (AXS) information.

  • Page 7: Information Regarding Safety

    HRK-1 Information regarding safety 2.1. Introduction Safety is everyone’s obligation and responsibility. Safe use of this device is important for everyone involved - installers, users, operators and device managers. It is a must to study and to master this user manual individually prior to installing, using, cleaning, repairing or controlling this device and its accessories.

  • Page 8: Safety Indication

    2.2. Safety indication The International Electro technical Commission (IEC) announced the symbols that warn when connecting electric medical device’s power or that warn against calamity that may occur. Classification and symbol are as follows. Symbols I and O regarding power switch signify power connection and blocking, respectively.

  • Page 9: Environment Related Matters

    HRK-1 Atmospheric Pressure Limitation This side up Fragile , handle with care Do not use hand hooks Keep DRY Stacking Limit by Number Keep away from sunlight 2.3. Environment related matters The following environment for operation and storage: Place where device comes directly into contact with moisture (do not operate the device with wet hand) Place where device is exposed directly to sunlight.
  • Page 10 Be cautious so that things like dust and metal do not fall inside the machine. Don’t disassemble or open the product. HUVITZ does not take responsibility for the possible problems Be careful not to block the fan of the machine.

  • Page 11: Safety Precautions

    This device should be operated by qualified personnel with sufficient training or under such personnel’s supervision. This device can be modified only by Huvitz’s service technician or a person with comparable qualifications. Device management by customer should be carried out as explained in the user or service manual.
  • Page 12 However, device’s unlawful modification becomes a factor for losing the right to get warranty during the warranty period. This device is utilized with the accessories provided by Huvitz. If consumer wants to use other manufacturers’ accessories, safety of use must be proven and confirmed by Huvitz or by the accessories’...
  • Page 13 HRK-1 Change direction or relocate the receiver Distance between equipment is increased Connect the equipment with the socket of the circuit connected with other device and other circuit Ask manufacturing business or field service technician for help To avoid electrocution, this device must be connected to the supply power along with protective grounding.

  • Page 14: Characteristics

    Characteristics It is possible to carry out both refractive power and corneal curvature measurement with one machine. It is possible to measure even the myopia since the refractive power measurement range is very broad ranging from –30 D to +25 D. When measuring refractive power, it is possible to measure up to a minimum pupil diameter Ø...

  • Page 15: Precautions During Use

    9. When HRK-1 is not used for a long time, separate the power and cover it with the dust cover. 10. When using this equipment under normal state, then the proper location is as shown below.

  • Page 16: Name And Function Of Each Part

    Name and function of each part 5.1. Key part [Front part] 1. Eye height mark: indicates the height that patient’s eyes should be placed 2. Stage fixation lever: for fixating stage 3. Movement indicator lamp: indicates whether the device power is turned on 4.
  • Page 17 HRK-1 [Back part] 1. Forehead rest: location for placing the forehead to prevent test subject from moving the face (Type B attachment part) 2. Measuring window: object lens for measuring the image that is formed in the eye retina 3. Chin rest: location for placing the chin to prevent test subject from moving the face (Chin rest paper: Type B attachment part) 4.
  • Page 18 [Lower part] 1. Power supply socket (Fuse holder): Socket that connects with the outside power plug (250V T3.15AL) 2. Serial interface connector: Connector for connecting outside device connector 3. RGB connector: Connector for connecting with the outside monitor of the RGB method 4.

  • Page 19: Main Measurement Screen Button Explanation

    HRK-1 5.2. Main measurement screen button explanation [Front part’s switch] (MODE) button: Main measurement mode Button for modifying (REF, KER, K&R,). (MANUAL) button: Button for selecting whether to carry out automatic measurement (Number is frequency) (MANUAL, AUTO-3, AUTO-5, AUTO-A) (AT) button: Button for selecting whether to use automatic tracking function (MT: manual /AT: automatic tracking for up &...
  • Page 20 (DATA CLEAR) Button: Button that deletes measurement result. (PRINT) Button: Button that prints measurement result. (SETUP) button: Button for converting to the user SETUP screen. (MEASURE) Button: Button that measures DATA. (CYLINDER) Display: Show current cylinder selected in “7. Cylinder button” (Displayed only in REF, K&R mode).

  • Page 21: Equipment Installation And Preparation For Measurement

    HRK-1 Equipment installation and preparation for measurement 1. Unlocking stage part’s lock 1 (Clamping bolt) Loosen up the ‘Clamping bolt’ that is at the backside of this device’s lower part by turning it to the counter clock-wise direction, and convert the stage fixation lever that is at the joystick’s backside into the UNLOCK direction.
  • Page 22 3. Access to the power cable - Place HRK-1 on a table. - Make sure the POWER switch of the instrument is OFF - Put in the power cable into the power connector at the main body’s lower part. - Put in the power plug into the AC socket.
  • Page 23 Normally, equipment that gets connected to this eye examination device include the PC that has Huvitz’s digital reflector, lens meter and software for management provided by a third party built-in. As for the connection and communication setting method, it may be different depending on the equipment that gets connected.

  • Page 24: Measurement Method

    If the measurement screen that is shown below does not appear on the monitor screen, turn off the power and turn on the power switch on again after 10 seconds. If the measurement screen does not appear, contact the Huvitz’s distributor. [Measurement screen] Selecting the Measurement mode This instrument has the measurement modes.
  • Page 25 HRK-1 [Measurement mode] 3. Height adjustment of patient - Have patient sit at the front part of the device. - Adjust device’s electric table or chair’s height so that the patient can sit comfortably. - Make sure place the patient’s chin on the chin rest and check that his/her forehead is touching to the forehead rest.
  • Page 26 CAUTION Do not have patient place his or her hand or finger on top of the chin rest’s lower part. Hand or finger may get injured. Cleanse forehead rest with solvent such as ethanol every time patient changes to prevent infection.
  • Page 27 HRK-1  [Height adjustment] Adjust by turning the operation lever  [Left and right adjustment] Lean the operation lever to the left and right to adjust so that the outer arrangement ring gets aligned to the Mire Ring’s location  [Focus adjustment] Lean the operation lever, front and back to adjust the focus so that the Mire Ring becomes clear.
  • Page 28 NOTE - Do not allow the eyelash and eyelid to cover the smallest measurable pupil diameter mark to ensure stable measurement. - If the device is too near to the patient in comparison with the optimal alignment position, the alignment indicators are displayed the upper direction or if it is too far from the patient, the alignment indicators are displayed the lower direction [Too close] [Too far]...

  • Page 29: Measurement

    HRK-1 Measurement 8.1. Refractive power measurement mode (REF mode) This is the mode that measures refractive power by itself. - REF mode selection: Set in a way that the measurement mode indicator section on the screen turns into “REF” mode.
  • Page 30 ① Eye height adjustment. ② Measurement location and focusing Outer line arrangement ring (Minimum pupilloscope Pupil Φ2.0mm) Iris Manual/Automatic [REF manual measurement mode screen] ③ Measurement Press on the measurement button. - Measurement is carried out continuously when measurement button is pressed on continually. Measurement result is indicated on the monitor when measurement is completed.
  • Page 31 HRK-1 Distance between pupils [Screen indicating distance between pupils] ⑥ Printing Print measurement result by pressing on the print button. Contents selected from the user Setup mode get printed. (Refer to “9.5. User Setup mode” part) Cut out the printing page.
  • Page 32 [Example of a printed page]...

  • Page 33: Automatic Measurement Mode

    HRK-1 8.1.2. Automatic measurement mode NOTE The automatic measurement mode is composed of optimum measurement conditions and can be measured reliably. If the patient's eyes move and it is difficult to measure, press the measurement button on the joystick. The mode gets converted to automatic measurement mode when MANUAL button is pressed on while in the manual measurement mode.

  • Page 34: Message List

    ④ Printing Measurement result gets printed automatically when the measurement of the two eyes gets completed when the A-PRT category was selected as “ON” while in the user Setup mode. Print by pressing on the print button when only one eye was measured or when the A-PRT category was selected as “OFF”.

  • Page 35: Corneal Curvature Measurement Mode (Ker Mode)

    HRK-1 8.2. Corneal curvature measurement mode (KER mode) This is the mode for measuring the radius of cornea’s curvature on its own. - KER mode selection: Set so that the measurement mode indicator section on the screen becomes “KER” mode.

  • Page 36: Automatic Measurement Mode

    [Example of a printed page] 8.2.2. Automatic measurement mode NOTE The automatic measurement mode is composed of optimum measurement conditions and can be measured reliably. If the patient's eyes move and it is difficult to measure, press the measurement button on the joystick.

  • Page 37: Message List

    HRK-1 The mode gets converted to automatic measurement mode when MANUAL button is pressed on while in the manual measurement mode. In case of automatic measurement mode, when the state reaches a state in which the arrangement in the device and measurement is realized effectively, measurement takes place automatically even when the measurement button is not pressed on.

  • Page 38: Continuous Corneal Curvature / Refractive Power Measurement Mode (K&R Mode)

    8.3. Continuous corneal curvature / refractive power measurement mode (K&R mode) This is the mode for carrying out the corneal curvature measurement and refractive power measurement continuously. - K&R mode selection: Set so that the measurement mode indicator section on the screen becomes “K&R”...
  • Page 39 HRK-1 ④ Prints measurement result through the process that is the same as that of the (printing) in the 8.1.1 refractive power measurement mode. [Example of a printed page]...

  • Page 40: Automatic Measurement Mode

    ⑤ Screen indication format selection It is possible to designate symbol of astigmatism refractive power in the measurement mode that includes refractive power measurement. It is possible to designate in the user Setup mode. Moreover, it is possible to indicate Refractive power’s measurement data following VD value in the measurement mode that includes refractive power measurement.

  • Page 41: Other Mode

    HRK-1 Other mode 9.1. COLOR VIEW mode This is the mode for observing with color screen by using Yellow Filter / White LED / Blue LED when it comes to the state when contact lens are worn by measuring cornea’s curvature radius.

  • Page 42: Yellow Filter

    : Indicates current LED’s brightness. : Button that increases stage of LED’s brightness by one step ① Press on the button in the main measurement mode so that the COLOR VIEW MODE measurement screen appears as shown on the figure when the COLOR button is pressed on.

  • Page 43: White Led

    HRK-1 [Color View mode indicator screen (Yellow Filter)] NOTE Yellow Filter function is the function that uses S/W. 9.1.2. White LED This is the function that uses White LED illumination to observe with color image. [Color View mode indicator screen (White LED)]...

  • Page 44: Blue Led

    9.1.3. Blue LED This is the function that observes cornea and contact lens Fitting degree by using fluorescence solution and Blue LED. 1. Wear contact lens after dyeing the eyes using fluorescence solution. button in the Color view mode, and use the operation lever to adjust eyes’ 2.

  • Page 45: Capture Image Viewing Screen

    HRK-1 [Color View mode - capture screen] 9.1.6. Capture image viewing screen [Color View mode – captured image selection screen] : Emphasizes the green of the measurement image. (It is possible to check the distribution state of the fluorescence solution easily by indicating after emphasizing the green color of the...
  • Page 46 : Measures angle. (Measures angle by touching the screen with three points of the angle to be measured.) : Measures length. (Measures length by touching the screen with two points at the ends of the two sides when it comes to the length to be measured.) : Indicates guideline (3 mm, 5 mm, 7 mm).
  • Page 47 HRK-1 : Indicates contact lens fitting state. (Automatically discerns out in stages whether cornea’s curvature and contact lens’ curvature is flat, normal or steep to indicate on the screen.) [Flat, Normal, Steep icon screen] : Returning to the original state.

  • Page 48: Size Mode (Pupil Diameter Measurement)

    9.2. SIZE mode (pupil diameter measurement) This is the mode that measures pupil’s diameter. 1. Press on the button in the main measurement mode. Then, SIZE mode gets selected when the SIZE button is pressed on. 2. Adjust location and focus the image of the eye to be measured clearly. [Size mode indicator screen (1)] Pupil Iris...
  • Page 49 HRK-1 3. Measurement location and focusing Ask patient to watch fixating target at the inside. Move the operation lever to adjust the location so that the pupil is in between two vertical bars. Focus is adjusted so that the cornea’s corners are clearly visible.

  • Page 50: Retro-Illumination Mode

    9.3. RETRO-ILLUMINATION mode Retro-Illumination mode is the mode that can observe eye lens by using Retro-illumination method. It is possible to observe eye lens’ state by observing the shape of the light that is reflected from the retina while changing the brightness of the light that is radiated onto the eyes through illumination. It is possible to observe the human beings’...

  • Page 51: Retro-Illumination Observation

    HRK-1 [Retro-Illumination measurement screen] Buttons of the Retro-Illumination mode that are indicated on the screen are as follows. : Button that converts to indicate on the measurement screen. : This is the button for seeing the Retro-Illumination image saved once again by using measurement button.

  • Page 52: Saving

    ③ Saving the image Use operation lever to adjust the focus on the image and save the image by pressing on the measurement button. 9.3.3. Saving It is possible to save up to two images for the left and right eyes when it comes to the images saved by using measurement button.

  • Page 53: Returning To The Main Measurement Mode

    HRK-1 ④ The screen returns to the observation screen when the button is pressed on in the Display mode. [Screen indicating saved image (amplification)] 9.3.6. Returning to the main measurement mode It is possible to return to the main measurement mode if you press on the button while at the observation screen.

  • Page 54: Display Mode

    9.4. DISPLAY mode It is possible to see the measurement results that are saved in the memory (up to 10 for the left and right eyes). The mode changes into the DISPLAY mode when the DISP button is pressed on after pressing on the button at the main measurement mode.
  • Page 55 HRK-1 : Button for deleting saved DATA and that returns to the measurement mode. : Button for printing saved DATA. 1. Refractometry measurement result Indicates the latest 10 measurement results (refractive power). 2. Keratometry measurement result Indicates the latest 10 measurement results (cornea curvature value).

  • Page 56: User Setup Mode

    9.5. User SETUP mode It is possible to adjust various setups related to the measurement, printer output and others. You can go into the user SETUP mode by pressing on the (SETUP MODE) button in the main measurement screen. 9.5.1. List of setup items & Initial Setup items are categorized in to 8 large indexes - REF - KER...
  • Page 57 HRK-1 MODE (COM1) Std / Avg / Misc HLM PRINT Off / On BPS (COM2) 9600 / 57600 / 115200 115200 RS232 PROTOCOL Off / On (COM2) MODE (COM2) Mate / HLM AUTO PRINT Off / On REF. PRINT Off / Std / Avg KER.

  • Page 58: Detailed Description Of Setting

    9.5.3. Detailed description of setting [Method for changing page] : Moves to the previous page. : Moves to the next page. [Method for changing contents] It is possible to select the desired tab to indicate the set value on the screen, and to change the setting by touching on the category to be modified.
  • Page 59 HRK-1 [Contents of the category]: 1/2 Page 1. REF (cornea measurement) VD (0.0/12.0/13.75/15.0) : Distance between corneal apex and corrective lens CYLINDER (-/+/Mix) : Astigmatism marking form STEP (0.01/0.12/0.25) : Unit for indicating spherical prescription and astigmatism prescription FOGGING (1Time/Always)
  • Page 60 : Select the target of second communication port. NOTE - For the users who want HRK-1 is connected with two devices at the same time, we prepare the RS232 Y CABLE. - If HRK-1 is connected with only one device, set [RS232 PROTOCOL (COM2)] off, and do not care about all of “COM2”...
  • Page 61 HRK-1 3) Set [BPS (COM1)], [RS232 PROTOCOL (COM1)] and [MODE (COM1)] for the target digital refractor. 4) Set [HLM PRINT] off. 5) Set [RS232 PROTOCOL (COM2)] on. 6) Set [BPS (COM2)] for the target HRK-Mate. 7) Select [Mate] for [MODE (COM2)] [Case 3.
  • Page 62 6. DISPLAY EXT. OUTPUT (Off/On) : Select whether to use external display output EXT. OUTPUT RATIO (4:3 / 16:9 / 5:4 / 16:10) : Select resolution of external display output LCD BRIGHTNESS (10 ~ 100%) : Adjust brightness of LCD display LCD COLOR TEMPERATURE (COOL ~ WARM) : Adjust color temperature of LCD display EXT.

  • Page 63: Input Method

    HRK-1 9.6. Input method [Other (text) input] [Text input] : Converts capital letter/small letter input mode. : Deletes all the input texts. : (Back Space) deletes only one letter in front of the cursor. : Converts the space in between the first and second lines.
  • Page 64 [Other (number) input] [Number input] Range: Minimum ~ maximum scope that can be input (Does not get saved when the scope is deviated from, and the warning message, “Out of Range!” appears.) : Deletes the last number. : Deletes all the numbers. : Saves number and exists number input mode.

  • Page 65: Self-Diagnosis And Maintenance/Repair

    HRK-1 Self-diagnosis and maintenance/repair 10.1. REF / KER Accuracy check Remove chin rest page, and fit in the pressing pin after aligning the hole at the Model Eye’s lower part with chin rest’s hole. Perform the measurement and compare with the display value at the bottom of the model eye.

  • Page 66: Replacing

    [Printer paper] CAUTION Be sure to use only the printer paper (9010A000001-A, W 57mm, D 50mm) specified by HUVITZ. If printer paper other than those specified is used, the printer head may be damaged due to printing failure or paper jam.

  • Page 67: Cleaning Equipment

    ⑦ For low-level disinfection(normally), the patient contact parts may be wiped with any of the following low level disinfectants Methods to disinfect to HRK-1 are as below: - Dry heat - Mechanical cleaning with disposable wipe / sterile gauze...

  • Page 68: Cleaning

    10.4. Cleaning 10.4.1. Cleaning the measuring window When the measuring window gets fingerprints or dust on it, the reliability of the measured values is impaired substantially. Check for dirt on the measuring window before use, and then clean it if it is dirty. 1) Blow off and dust on the measuring window with a blower.

  • Page 69: Prior To Contact With Prefered Distributor

    HRK-1 10.5. Prior to contact with preferred distributor Should the device function improperly, attempt to correct the problem according to the following table before contacting sales distributor. Contact a sales distributor after turning off the power when the device does not resume normal operation even after taking the following measures.

  • Page 70: When Moving Equipment Installation Place

    - The stage fixation lever may be locked. Unlock the stage fixation lever at the back of the joystick.(Refer to 6 phase) The main body cannot - The body lock may be locked. Unlock the body lock on both be moved laterally sides of the main body.

  • Page 71: Information Needed For Servicing

    HRK-1 Information needed for servicing Repair: Contact the Huvitz’s distributor after preparing the information on the following matters when the problem is not resolved even after taking the measures described on 10.5 Phase. equipment name: HRK-1 equipment’s serial number: number on the name plate that is comprised of numbers and letters(SN)
  • Page 72 Huvitz Co., Ltd. contact numbers Address: Huvitz Co., Ltd. 38, Burim-ro 170beon-gil, Dongan-gu, Anyan-si, Gyeonggi-do, 14055, Republic of Korea Manufacturer: Huvitz Co., Ltd. 38, Burim-ro 170beon-gil, Dongan-gu, Anyan-si, Gyeonggi-do, 14055, Republic of Korea Tel: 031-428-9100 (main) Fax: 031-477-9022 (FA Team: Field Application Team) e-mail: svc@huvitz.com...

  • Page 73: Key Specs

    HRK-1 Key specs Measurement mode Cornea/curve continuous measurement (K/R mode) Curve measurement (REF mode)，cornea measurement (KER mode) Curve measurement Distance between vertex 0.0, 12.0, 13.75, 15.0 of cornea (VD) Spherical prescription -30.00 ~ +25.00 D (in case of VD = 12 mm)
  • Page 74 Chin rest travel distance 60 mm (± 5 mm) Up and down Data memory 10 session worth of measurement values for each of the eyes on the left and right Interface RS-232C (in/Out) Ext. VIDEO Analog RGB Hardware specs Built-in printer Thermoelectric line printer Key power is blocked when the measurement is stopped up the set time.

  • Page 75: Accuracy

    HRK-1 Accuracy - The accuracy specifications are based on the results of model eye testing performed in accordance with ISO10342 Ophthalmic instruments- Eye Refractometers, ISO10343 Ophthalmometers. 1) Refractometry Criterion Measuring range Maximum Test device Tolerance scale interval -15D ~ +15D 0.25D...

  • Page 76: Accessories

    Accessories [Accessories] 1. Power cable (AC 220 V / 60 Hz power code, 1.5m) ···················································1 2. Model Eye ········································································································1 (SPH: –2.50D~-2.75D, CYL: -1.25D~-1.50D, R1: 7.95~8.00, R2: 7.78~7.83) 3. Chin rest paper (100 pages) ·················································································1 4. Printer page(roll) ································································································2 5. Dust cover ········································································································1 6.

  • Page 77: Emc Information

    Manufacturer announcement – electromagnetic waves tolerance electromagnetic waves tolerance HRK-1 is to be used in the below designated electromagnetic wave environment. HRK-1 customer and user need to guarantee that the HRK-1 will be used in this type of environment. IEC 60601 Tolerance test...
  • Page 78 Electromagnetic waves tolerance HRK-1 is to be used in the below mentioned electromagnetic wave environment. HRK-1 purchaser or user needs to confirm whether HRK-1 issued at this environment. Tolerance test IEC 60601 Appropriateness level test conditions Conductivity RF 3 Vrms...

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