Topcon RM-8900 Instruction Manual
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Topcon RM-8900 Instruction Manual

Auto refractometer, auto kerato-refractometer
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INSTRUCTION MANUAL
AUTO REFRACTOMETER
RM-8900
AUTO KERATO-REFRACTOMETER
KR-8900

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Do you have a question about the RM-8900 and is the answer not in the manual?

Questions and answers

Andrea Zimmerman
May 22, 2025

Hi My Topcon A/R KR 8900 does not print any longer. Is there a way to replace the ink?

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1 comments:
Mr. Anderson
May 25, 2025

The Topcon A/R KR 8900 uses thermal printer paper and does not require ink replacement. Instead, ensure that the correct 58mm wide thermal paper roll is used (e.g., TF50KS-E2C). When the red line appears on the paper or “PAPER END” is displayed, replace the paper roll following the instructions in the "PRINTER PAPER SETTING" section.

This answer is automatically generated

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Summary of Contents for Topcon RM-8900

  • Page 1 INSTRUCTION MANUAL AUTO REFRACTOMETER RM-8900 AUTO KERATO-REFRACTOMETER KR-8900...

  • Page 3: Introduction

    INTRODUCTION Thank you for purchasing the Auto Refractometer RM-8900, Auto Kerato-Refractometer KR-8900. This instrument is used to measure the spherical refractive-power,cylindrical refractive power, the direction of astigmatic axis, the radius of curvature, the direction of principal meridian and the cor- neal refractory power.

  • Page 4: Precautions

    (4) Do not store the instrument where chemicals are stored or gas is generated. 3.USAGE PERIOD 8 years from delivery providing regular maintenance is performed (according to the self-cer- tification [Topcon data]) ENVIRONMENTAL CONDITIONS FOR PACKING IN TRANSPORTATION Temperature: -40°C~70°C...

  • Page 5: Safety Displays

    SAFETY DISPLAYS In order to encourage the safe use of the instrument and to avoid danger to the operator and oth- ers as well as damage to properties, warnings are described in the Instruction Manual and marked on the instrument body. We suggest you thoroughly understand the meaning of the following displays/icons and Safety Cautions, as well as read the Manual, and strictly observe the instructions.

  • Page 6: Safety Cautions

    SAFETY CAUTIONS WARNINGS Icon Meaning Page To avoid electric shocks, do not attempt overhauling, rebuilding or repairs. Ask your dealer for repair. To avoid electric shocks, do not remove covers from bottom and top surfaces, monitor, measuring unit, etc. To prevent shock hazard, do not allow water or other foreign matter ––...
  • Page 7 SAFETY CAUTIONS CAUTIONS Icon Meaning Page Before moving the instrument, fasten the clamping knob at the bot- tom surface to stop movements. Negligence of this may cause injury by falling parts. When moving the instrument, be sure to hold it at the bottom sur- face with two persons.

  • Page 8: Usage And Maintenance

    For details, See “CLEANING THE INSTRUMENT” on page 83. ESCAPE CLAUSES • TOPCON shall not take any responsibility for damage due to fire, earthquakes, actions by third persons and other accidents, or the negligence and misuse of the user and use under unusual conditions.

  • Page 9: Warning Indications And Positions

    To secure safety, this equipment provides warnings. Correctly use the equipment following these warning instructions. If any of the following mark- ing labels are missing, please contact your dealer or TOPCON to the address stated on the back cover. CAUTION •...

  • Page 10: Table Of Contents

    CONTENTS INTRODUCTION ....................1 PRECAUTIONS ....................2 WORKING ENVIRONMENT ................2 STORAGE, USAGE PERIOD AND OTHERS ............2 ENVIRONMENTAL CONDITIONS FOR PACKING IN TRANSPORTATION ..2 SAFETY DISPLAYS ................... 3 SAFETY CAUTIONS ..................4 USAGE AND MAINTENANCE ................6 USER MAINTENANCE ..................6 ESCAPE CLAUSES ...................6 WARNING INDICATIONS AND POSITIONS .............7 COMPONENT NAMES MAIN BODY COMPONENTS ................10 CONTROL PANEL COMPONENTS ..............11...
  • Page 11 TROUBLESHOOTING TROUBLE-SHOOTING OPERATIONS ............73 SPECIFICATIONS AND PERFORMANCE ELECTROMAGNETIC COMPATIBILITY ............77 ELECTRIC RATING ..................81 SYSTEM CLASSIFICATION ................81 DIMENSIONS AND WEIGHT ................81 PURPOSES OF USE ..................81 REFERENCE OPTIONAL ACCESSORIES ................82 SHAPE OF PLUG .....................82 MAINTENANCE DAILY CHECKUPS ..................83 MAINTENANCE ....................87...

  • Page 12: Component Names

    COMPONENT NAMES MAIN BODY COMPONENTS Measuring Head Unit Measuring Head monitor Measurement switch Contorol lever Clamping knob Base Unit Control panel Power lamp Clamping knob (for movement) External I/O terminal Chinrest Unit Forehead rest Examination window Eye height mark Brightness volume Printer cover open switch Chinrest tissue pin...

  • Page 13: Control Panel Components

    CONTROL PANEL COMPONENTS RM-8900 Print switch Graphic print switch Menu switch IOL switch Target image observation switch Fixation target brightness switch CYL (cylinder) display selection switch Print switch........Prints out the measurement result. When there is no measurement value, press the switch to feed paper.
  • Page 14 KR-8900 Print switch Graphic print switch Menu switch Auto start switch Target image IOL switch observation switch Fixation target brightness switch CYL (cylinder) display selection switch Measurement Cornea diameter mode switch switch Print switch......Prints out the measurement result. When there is no mea- surement value, press the switch to feed paper.

  • Page 15: Monitor Screen

    MONITOR SCREEN RM-8900 MEASURING SCREEN (LAYOUT 1) Result of refractory power IOL Mode S + 0.00 C +0.50 A 100 measurement Fixation target brightness Frequency of measurement CYL power symbol Vertical distance Alignment mark 12.00 Instrument No. Smallest measurable pupil Patient No.
  • Page 16 KR-8900 MEASURING SCREEN(LAYOUT 1) Mode Vertical distance IOL Mode S + 0.00 + 0.50 Result of refractory power D/MM mark H 44.00 44.00 measuremen Fixation target brightness Cornea measurement result R 03 03 03 03 Frequency of measurement (REF) CYL power symbol Frequency of measurement (KRT) Vertical distance 12.00...

  • Page 17: Printer Output

    PRINTER OUTPUT RM-8900 Bar code Work ID No. Patient No. Instrument No. VD (vertical distance) Cylindrical power mark Results of 5 refractory power measurements of right eye (recordable up to 10 measurements) Typical value of right eye Equivalent spherical power of right eye...
  • Page 18 KR-8900 When "KRT PRINT TYPE" is set to "NORMAL" <R/K> mode Bar code Work ID No. Patient No. Instrument No. VD (vertical distance) Cylindrical power mark Right eye measurements Measurement Results of 3 right eye measurements (recordable up to 10 measurements) Typical value of riht eye Equivalent spherical power of right eye The ( ) mark is added when measurement values are not...
  • Page 19 <REF> mode <KRT> mode Patient No. Instrument No. VD (vertical distance) Typical measured value Cylindrical power mark of right eye corneal Results refractory curvature power measurements Measured value of right right eye (recordable up to eye cornea (mm) 10 measurements) Results of 5 right eye cor- neal curvature measure- Typical value of right eye...
  • Page 20 When "KRT PRINT TYPE" is set to "CLASSIC" <R/K> mode Bar code Work ID No. Instrument No. Patient No. Instrument No. VD (vertical distance) Cylindrical power mark Right eye measurements Measurement Results of 5 right eye measurements (recordable up to 10 measurements) Typical value of riht eye (The * mark is displayed when 3 or more measurements are done.) Equivalent spherical power of right eye...
  • Page 21 <REF> mode <KRT> mode Patient No. Instrument No. VD (vertical distance) Typical measured value of Cylindrical power mark right eye corneal curvature Results of 5 refractory power measurements of right eye (recordable up to 10 measurements) Measured value of right eye cornea (mm) Typical value of right eye Results of 5 refractory...

  • Page 22: Standard Accessories

    STANDARD ACCESSORIES The following are standard accessories. Make sure that all these items are included (quantity). Power cable (1) Chinrest pin (2) Printer paper (2) Silicon cloth (1) Chinrest tissue (1) Dust cover (1) Fuse (2) Instruction manuals: unpacking and assembling (1 each) Accessory box (1) Model eye (1) COMPONENT NAMES...

  • Page 23: Preparations

    PREPARATIONS INSTALLATION Before moving the instrument, fasten the clamping knob at the bottom surface to stop movements. Negligence of this may CAUTION cause injury by falling parts. When moving the instrument, be sure to hold it at the bottom surface with two persons. Carrying by one person may cause a backache or injury by falling parts.

  • Page 24: Connecting Power Cable

    CONNECTING POWER CABLE Be sure to connect the power plug to an AC 3-pin receptacle equipped with grounding. Connection with receptacle without WARNING grounding may cause fire and electric shock in case of short- circuiting. To avoid electric shocks, do not handle the power plug CAUTION with wet fingers.

  • Page 25: Initial Settings

    DATA IN Also, this machine may be connected with a bar code reader using RS232C. Connect the connection cable to the IN terminal of the main body. Connect the other end of the connection cable to the external device. INITIAL SETTINGS In the initial setting, settings such as patient No., instrument No., refractory power shift, ON LINE, auto print, etc.

  • Page 26: Initial Set Screen

    INITIAL SET SCREEN In the INITIAL SET screen, buzzer sound, refractory power shift, display of typical value in monitor screen and date can be changed. In the “INITIAL MENU SCREEN”, make sure that the cursor is on “INITIAL SET”, and then press the .
  • Page 27 SHIFTING REFRACTORY POWER The refractory power (S value) can be shifted. Before shipment, it is set to +0.37. In the “INITIAL MENU SCREEN”, choose “INITIAL SET” and get the “INITIAL SET” screen. I N I T I A L S E T BUZZER DPTR SHIFT +0.37...
  • Page 28 CHANGING DATE DISPLAY The date format of printout can be changed. Before shipment, it is set to “JUN.01.2003”. In the “INITIAL MENU SCREEN”, choose “INITIAL SET” and get the “INITIAL SET SCREEN”. I N I T I A L S E T BUZZER DPTR SHIFT 2003.12.01...
  • Page 29 CHANGING THE CORNEA DIAMETER MEASUREMENT METHOD (Only in KR-8900) The method of cornea diameter measurement can be chosen between the measurement using the actual image or the static image. Before shipment, the setting is NO (measurement using actual image). Press the and bring the cursor to C.D MEMORY.
  • Page 30 ADD FACTOR The ordinary additional power (ADD) can be printed out. Before shipment, it is set to [NO] (no printout). In the “INITIAL MENU SCREEN”, choose “INITIAL SET” and get the “INITIAL SET SCREEN”. I N I T I A L S E T DPTR SHIFT AVERAGE DISP.

  • Page 31: No. Setting

    NO. SETTING In the NUMBER SET screen, patient No. setting, monitor screen display of patient No., printing patient No., resetting of patient No., instrument No. setting, monitor screen display of instrument No. and printing instrument No. can be changed. In the “INITIAL MENU SCREEN”, press the and move the cursor MEASUREMENT SWITCH to “NUMBER SET”.
  • Page 32 MONITOR SCREEN DISPLAY OF PATIENT NO. The patient No. can be displayed in the monitor screen. Before shipment, it is set to (YES). In the “INITIAL MENU SCREEN”, choose “NUMBER SET” and get the “NUMBER SET SCREEN”. N U M B E R S E T SERIAL NO.
  • Page 33 RESETTING PATIENT NO. The patient No. can be reset by switching on the power source. Before shipment, it is set to “NO” (no reset). In the “INITIAL MENU SCREEN”, choose “NUMBER SET” and get the “NUMBER SET SCREEN”. N U M B E R S E T SERIAL NO.
  • Page 34 MONITOR SCREEN DISPLAY OF INSTRUMENT NO. The instrument No. can be displayed in the monitor screen. Before shipment, it is set to “NO” (no display). In the “INITIAL MENU SCREEN”, choose “NUMBER SET” and get the “NUMBER SET SCREEN”. N U M B E R S E T SERIAL NO.

  • Page 35: Printout

    PRINTOUT In the PRINT OUT screen, printout format, KRT printout format (only KR-8900), printing equivalent spherical power, printing computer lensmeter data, and printing bar code can be changed. In the “INITIAL MENU SCREEN”, press the and move the cursor MEASUREMENT SWITCH to “PRINT OUT”.
  • Page 36 R/K PRINTOUT FORMAT(ONLY KR-8900) You can set the printout type in the [R/K] mode. "NORMAL" (Print out only the central diopter value of kerato data) is set when shipped. In the “INITIAL MENU SCREEN”, choose “PRINT OUT” and get the “PRINT OUT SCREEN”. KRT PRINT TYPE NORMAL CLASSIC...
  • Page 37 PRINTING COMPUTER LENSMETER DATA Computer lensmeter data can be printed. Before shipment, it is set to “NO” (no printout). In the “INITIAL MENU SCREEN”, choose “PRINT OUT” and get the “PRINT OUT SCREEN”. P R I N T O U T KRT PRINT TYPE MEASURE SWITCH ITEM...
  • Page 38 AUTO PRINT AFTER FINISHING AUTO START MEASUREMENT (Only in KR-8900) Press the and bring the cursor to AUTO PRINT. MEASUREMENT SWITCH P R I N T O U T KRT PRINT TYPE MEASURE SWITCH ITEM PRINT SWITCH SELECT Press the and choose “YES”...
  • Page 39 CHANGING THE PRINTOUT DISPLAY ORDER (Only in KR-8900) Press the and bring the cursor to “PRINT R/L”. MEASUREMENT SWITCH P R I N T O U T KRT PRINT TYPE DATA PRINT R MEASURE SWITCH ITEM PRINT SWITCH SELECT Press the and choose PRINT SWITCH DATA (separate printout for REF/KRT), or...

  • Page 40: Custom-Print Settings

    On the custom-print screen, the details of the following items can be changed individually: refraction measurement values, cornea measurement values, corneal astigmatism and axial angles, PD values, the name, date, VD values, cylindricity mark and the TOPCON mark On/Off. On the “PRINT OUT SCREEN”, press the and move the cursor to MENU SWITCH “PRINT TYPE”.
  • Page 41 CHANGING THE PRINT TYPE OF REFRACTION MEASUREMENT VALUES The print type of refraction measurement values may be changed. Before shipment it is set to “ALL” (print all data). On the “PRINT OUT SCREEN”, move the cursor to “PRINT TYPE”, and with “CSTM” selected, press the and get the “CSTM SCREEN”.
  • Page 42 PRINTING AVERAGE VALUES OF CORNEA MEASUREMENTS (Only in KR-8900) Average values of cornea measurements may be printed out. Before shipment it is set to “YES” (print average values). On the “PRINT OUT SCREEN”, move the cursor to “PRINT TYPE”, and with “CSTM” selected, press the and get the “CSTM SCREEN”.
  • Page 43 PRINTING PD VALUES PD values may be printed out. Before shipment it is set to “YES” (print PD values). On the “PRINT OUT SCREEN”, move the cursor to “PRINT TYPE”, and with “CSTM” selected, press the and get the “CSTM SCREEN”. IOL SWITCH C U S T O M P R I N T REF DATA...
  • Page 44 PRINTING THE DATE The date may be printed out. Before shipment it is set to “YES” (print date). On the “PRINT OUT SCREEN”, move the cursor to “PRINT TYPE”, and with “CSTM” selected, press the and get the “CSTM SCREEN”. IOL SWITCH C U S T O M P R I N T KRT DATA...
  • Page 45 . The cursor moves to the next item. MEASUREMENT SWITCH PRINTING THE TOPCON MARK The TOPCON mark may be printed out. Before shipment it is set to “YES” (print TOPCON mark). On the “PRINT OUT SCREEN”, move the cursor to “PRINT TYPE”, and with “CSTM”...

  • Page 46: On-Line (Data Communication)

    ON-LINE (DATA COMMUNICATION) In the ON-LINE screen, computer lensmeter data receiving format, communication format and communication speed can be changed. In the “INITIAL MENU SCREEN”, press the and move the cursor MEASUREMENT SWITCH to “ON-LINE”. Press the , and the monitor screen is changed to the “ON-LINE SCREEN”. PRINT SWITCH O N - L I N E CL INPUT...
  • Page 47 , and the cursor goes to the next item. MEASUREMENT SWITCH SETTING COMMUNICATION FORMAT The communication format can be set. Before shipment, it is set to “OLD” (old TOPCON format). In the “INITIAL MENU SCREEN”, choose “ON-LINE” and get the “ON-LINE SCREEN”.
  • Page 48 , and the cursor goes to the next item. MEASUREMENT SWITCH For inquiries about the RS232C communication format, please contact your dealer or Topcon at the address stated on the back cover. SELECTING RS232C OUTPUT DATA (Only in KR-8900) Press the and bring the cursor to “OUTPUT DATA TYPE”s.

  • Page 49: Menu Setting

    MENU SETTING In menu setting, data step, contact/glasses, continuous measurement, RS232C, date and time can be set. PREPARATION FOR MENU SETTING Make sure of the connection of power cable. For connection, see “CONNECTING POWER CABLE” on page 22. Press “ON” the power switch. DISPLAYING MENU SCREEN Make sure of the measurement screen.
  • Page 50 SETTING STEP The measurement step can be selected from 0.12, 0.25. Before shipment, it is set to “0.25”. Press the of the control panel and get the “SETTING MENU SCREEN”. MENU SWITCH “STEP” is inverted, and measurement steps are displayed on the right with the set step inverted.
  • Page 51 SETTING VD In VD setting, contact (0) or glasses (12mm or 13.75mm) can be selected. Before shipment, it is set to glasses (12mm). Press the of the control panel and get the “SETTING MENU SCREEN”. MENU SWITCH Press the and invert “VD”. MEASUREMENT SWITCH VD figures are displayed on the right.
  • Page 52 SETTING OUTPUT DATA The RS232C output can be set. Before shipment, it is set to “NO” (no output). Press the of the control panel and get the “SETTING MENU SCREEN”. MENU SWITCH Press the and invert “OUTPUT DATA”. MEASUREMENT SWITCH “YES”...
  • Page 53 SETTING DATE/TIME Press the of the control panel and get the “SETTING MENU SCREEN”. MENU SWITCH Press the and invert “DATE/TIME”. MEASUREMENT SWITCH The date/time is displayed on the right. Press the and invert the desired item. PRINT SWITCH Change figures by pressing the (increase) or (decrease).
  • Page 54 SETTING HV/R1R2 (Only in KR-8900) You can select how the cornea measurement is displayed on the monitor screen from either HV (horizontal/vertical direction) or R1R2 (radius of curvature of first/second principal meridian). When shipped, the HV(horizontal/vertical direction) is selected as the default setting.

  • Page 55: Printer Paper Setting

    PRINTER PAPER SETTING • Note that printing cannot be done if the paper back faces up by set- NOTE: ting the roll in opposite direction. Press the to open the printer cover. PRINTER COVER OPEN SWITCH Printer cover Printer cover open switch Open the printer cover to the utmost limit.

  • Page 56: Resetting From Power Save Status

    Arrange the position so that the paper can come out from the center of the printer outlet. Then, close the printer cover. Unless the printer cover is correctly closed, it is not possible to execute printing. At this time, "CLOSE PRT COVER" is displayed on the monitor screen. A 58mm wide paper roll (example: TF50KS-E2C [Nippon Paper Co.]) is recom- mended.

  • Page 57: Basic Operations

    BASIC OPERATIONS PREPARATION BEFORE MEASUREMENT APPLYING POWER SOURCE Make sure of the connection of power cable. For connection, see “CONNECTING POWER CABLE” on page 22. Press on the POWER SWITCH Confirm that the title screen is displayed and then the MEASUREMENT screen is dis- played in a few seconds.
  • Page 58 Adjust the chinrest height so that the patient's eye becomes level with the eye height mark. Eye height mark BASIC OPERATIONS...

  • Page 59: Measurement Under Auto Start Mode (Only In Kr-8900)

    MEASUREMENT UNDER AUTO START MODE (ONLY IN KR-8900) • Adjust the height of automatic instrument table so that the patient NOTICE can sit on the chair with comfort to obtain correct measurement values. POSITIONING THE PATIENT In the initial status after power on, the mode is set to the auto start. Make sure of the measurement screen.
  • Page 60 COLLIMATION AND MEASUREMENT (ADJUSTING THE PATIENT'S EYE TO AUTO REFRACTOMETER) Alignment operations are done with the control lever. Movement operations of the main body using the control lever. • The main body position can be fine-adjusted laterally by inclining the control level to each direction.
  • Page 61 Hold the control lever and move the main body to the operator side. Operate the control lever laterally and vertically to obtain the target eye in the center of monitor screen. R 00 00 00 00 12.00 0001 While moving the main body toward the patient, focus the target eye. A vague, reflected luminous point for alignment appears on the cornea.
  • Page 62 Keeping the luminous point within the alignment mark, slowly move the main body toward the patient. When the main body approaches the target eye, the alignment bar of the monitor screen changes to arrows. R 00 00 00 00 Minimum pupil diameter 12.00 0001 Take care so that eyelashes and eyelid do not come into the minimum pupil diam-...
  • Page 63 After the alignment bar is displayed, move the main body slowly towards the patient. Measurement is done and the measurement value is displayed on the monitor screen. S-1.00 C H 7.71 V 7.70 A180 R 01 00 00 00 12.00 0001 •...

  • Page 64: Measurement Under Manual Mode

    MEASUREMENT UNDER MANUAL MODE • Adjust the height of automatic instrument table so that the patient NOTICE can sit on the chair comfortably to obtain accurate measurement values. SETTING THE PICTURING MODE In the initial status after power on, the mode is set to the auto start. Check of the measurement screen.
  • Page 65 Operate the control lever laterally and vertically so as to obtain the target eye in the center of monitor screen. R 00 00 00 00 Luminous point Alignment mark 12.00 0001 While moving the main body toward the patient, focus the target eye. A vague, reflected luminous point for alignment appears on the cornea.

  • Page 66: Erasing Measurement Values

    ERASING MEASUREMENT VALUES While pressing the of the control panel, press the . All MENU SWITCH PRINT SWITCH measurement values, both right and left eyes are cleared, and the system returns to the initial status after power on. Menu switch Print switch BASIC OPERATIONS...

  • Page 67: Individual Operations

    INDIVIDUAL OPERATIONS PRINT-OUT OF MEASUREMENT VALUES • To avoid paper jam in the printer, do not feed the paper if it is partly cut/torn or wrinkled. • To avoid discoloring the printing paper (particularly the recording area) during storage, use a polypropylene holder and not one con- taining plasticizer (PVC, etc.).
  • Page 68 To cut the paper, hold the top left corner and pull it diagonally, as illustrated. INDIVIDUAL OPERATIONS...

  • Page 69: Measurement Of Cornea Diameter (Only In Kr-8900)

    MEASUREMENT OF CORNEA DIAMETER (ONLY IN KR-8900) For the measurement of cornea diameter, “C.D.MEMORY YES” (measurement of static image) or “C.D.MEMORY NO” (measurement of dynamic image) can be selected in the initial setting. For changing settings, see “Changing the cornea diameter measurement method (Only in KR- 8900)”...
  • Page 70 Bring the left positioning bar to the left end of iris by pressing the (for AUTO START SWITCH moving left) and (for moving right). TARGET IMAGE CORNEA DIAMETER Press the MEASUREMENT SWITCH The guide mark moves right. Bring the right positioning bar to the right end of iris by pressing the AUTO START SWITCH (for moving left) and (for moving right).
  • Page 71 • To get out of the mode during measurement, press the PRINT SWITCH • When the measurement result is necessary for one eye only, do the measure- ment and then press the and get out of the mode. PRINT SWITCH •...
  • Page 72 Store the image of left eye in like manner. CORNEA DIAMETER (Measuring the left eye only) Press the CORNEA DIAMETER SWITCH Make sure of the cornea diameter screen. Bring the left positioning bar to the left end of iris by pressing the (for AUTO START SWITCH moving left) and...

  • Page 73: Measurement Of Hard Contact Lens

    MEASUREMENT OF HARD CONTACT LENS Make sure the unit is in the corneal curvature measurement (R/K or KRT) mode. If not, choose the R/K or KRT mode by the MEASUREMENT MODE SWITCH Fill the concave part at the top of contact lens holder of model eye with water, and paste the contact lens.

  • Page 74: Input/Output Using Rs232C

    When output is completed, “ DATA OUT” is displayed in the monitor screen. Please make sure to install the driver and create software prior to output data to a computer. For inquiries or information, please contact your dealer or TOPCON at the address stated on the back cover.

  • Page 75: Troubleshooting

    TROUBLESHOOTING TROUBLE-SHOOTING OPERATIONS MESSAGES GIVEN DURING MEASUREMENT “OVER-SPH” Spherical power exceeds +22D or -25D. “OVER-CYL” Cylindrical power exceeds ±10D. “OVER-R” Indicates that the corneal curvature exceeds 5.00-10.00mm. “NO TARGET” This indicates there is no target eye or the eye image is too dark. “AGAIN”...
  • Page 76 If a trouble is suspected, check conditions following the check list shown below. If the disposition according to the given instructions does not improve the condition, or if there is no relevant check item in the list, contact your dealer or TOPCON to the address stated on the back cover.

  • Page 77: Specifications And Performance

    SPECIFICATIONS AND PERFORMANCE RM-8900 Sphere: -25D to +22D 0.25D step display (switchable to 0.12D step display) Cylinder: 0 to ±10D 0.25D step display (switchable to 0.12D step display) Axis: 0 to 180°1° step display (switchable to 5° step display) (Sphere+Cylinder +22D or Sphere+Cylinder -25D) Minimum pupil diameter measurable: 2.0φmm...
  • Page 78 KR-8900 Sphere: -25D to +22D 0.25D step display (switchable to 0.12D step display) Cylinder: 0 to ±10D 0.25D step display (switchable to 0.12D step display) Axis: 0~180° 1° step display (switchable to 5° step display) (Sphere+Cylinder +22D or Sphere+Cylinder -25D) Radius of corneal curvature: 5.00~10.00mm, (0.01mm step display) Corneal refractory power:...

  • Page 79: Electromagnetic Compatibility

    USB cable Guidance and manufacturer's declaration - electromagnetic emissions The RM-8900,KR-8900 is intended for use in the electromagnetic environment specified below. The customer or the user of the RM-8900,KR-8900 should assure that it is used in such an environment. Emissions test...
  • Page 80 Guidance and manufacturer's declaration - electromagnetic immunity The RM-8900,KR-8900 is intended for use in the electromagnetic environment specified below. The customer or the user of the RM-8900,KR-8900 should assure that it is used in such an environment. IEC 60601 Compliance...
  • Page 81 Guidance and manufacturer's declaration - electromagnetic immunity The RM-8900,KR-8900 is intended for use in the electromagnetic environment specified below. The customer or the user of the RM-8900,KR-8900 should assure that it is used in such an environment. IEC 60601 Compliance...
  • Page 82 RF communications equipment and the RM-8900,KR-8900 The RM-8900,KR-8900 is intended for use in an electromagnetic environment in which radi- ated RF disturbances are controlled. The customer or the user of the RM-8900,KR-8900 can help prevent electromagnetic interference by maintaining a minimum distance between porta-...

  • Page 83: Electric Rating

    LEAKAGE CURRENT. • Degree of protection against harmful ingress of water: IPX0 RM-8900 and KR-8900 has no protection against ingress of water. (The degree of protec- tion against harmful ingress of water defined in IEC 60529 is IPX0) • Classification according to the method(s) of sterilization or disinfection recommended by the manufacturer: not applicable.

  • Page 84: Reference

    REFERENCE OPTIONAL ACCESSORIES • Automatic instrument table AIT-16 The table height can readily be adjusted to facilitate measurement. Specifications • Dimensions ....490(W)x525(D)mm • Table height....665~885mm • Table size ....490x500mm • Weight .......approx. 25kg • Power consumption ..150VA (100-120V,220-240V) • RS232C on-line cable SHAPE OF PLUG Country Voltage/frequency...

  • Page 85: Maintenance

    • When not in use, turn off the POWER switch. ORDERING CONSUMABLE ITEMS • When ordering consumable items, tell the product name, product code and quantity to your dealer or TOPCON to the address stated on the back cover. Product name Product code...
  • Page 86 USER MAINTENANCE ITEM Item Inspection time Contents • The instrument must oprate Inspection Before using • The objective lens must be free of stain or flaw. • Objective lens Cleaning When the part is stained • External cover, control panel, etc. Replacement As required •...
  • Page 87 ADJUSTING THE MONITOR SCREEN • Though this instrument is properly adjusted before shipment, sometimes screen adjustment is required due to vibrations during transportation. • To adjust contrast and brightness, turn volumes fully clockwise, viewed from the operator side, and then adjust each properly. BRIGHT PRINTER PAPER JAM •...
  • Page 88 FUSE CHANGE To avoid electric shocks during fuse change, be sure to unplug the power cable before removing the fuse lid. WARNING Also, do not plug the power cable leaving the fuse box open. Always use the attached fuse (3A 250V). Using any other type WARNING may cause troubles and fire.

  • Page 89: Maintenance

    MAINTENANCE CLEANING THE DUST COVER • Avoid cleaning plastic parts with solvents. Benzine, thinner, ether NOTICE an gasoline may cause discoloring and decomposition. If the dust cover, control panel, etc. get soiled, wipe the surface with dry cloth. If the dust cover is noticeably stained, wipe the surface with a cloth which is moistened in a tepid water solution of neutral detergent for food and then squeezed out.
  • Page 91 When calling please have ready the following information about your unit: • Machine type: RM-8900,KR-8900 • Manufacturing No. (Shown on the rating plate on the right side of the base.) • Period of Usage (Please give us the date of purchase).
  • Page 92 AUTO REFRACTOMETER RM-8900 AUTO KERATO-REFRACTOMETER KR-8900 41842 45990 Printed in Japan 0806-100TH 0...

This manual is also suitable for:

Kr-8900

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