LENSMETER
Model LM-770 OPERATOR’S OPERA TOR’S MANUAL
NIDEK CO., LTD. (Manufacturer)
: 34-14, Maehama, Maehama, Hiroishi-cho, Gamagori, Gamagori, Aichi 443-0038, Japan Japan Telephone: (0533) 67-6611 Facsimile: (0533) 67-6610 NIDEK CO., LTD : 6th Floor, Takahashi Takahashi Bldg., No.2, 3-chome, 3-chome, Kanda-jinboucho Kanda-jinboucho (Tokyo Office) Chiyoda-ku, Tokyo 101-0051, Japan Telephone: (03) 3288-0571 Facsimile: (03) 3288-0570 Telex: 2226647 NIDEK J NIDEK INCORPORATED : 47651 Westinghouse Drive, Fremont, California 94539, 94539, U. S. A. (United States Agent) Telephone: (510) 226-5700 Facsimile: (510) 226-5750 NIDEK SOCIETE ANONYME : Europarc 13, rue Auguste Auguste Perret, 94042 94042 CRETEIL, France France (Authorized Representative) Telephone: (01) 49 80 97 97 Facsimile: (01) 49 80 32 08
June 2006 30283-P902E Printed in JAPAN
NIDEK CO., LTD. (Manufacturer)
: 34-14, Maehama, Maehama, Hiroishi-cho, Gamagori, Gamagori, Aichi 443-0038, Japan Japan Telephone: (0533) 67-6611 Facsimile: (0533) 67-6610 NIDEK CO., LTD : 6th Floor, Takahashi Takahashi Bldg., No.2, 3-chome, 3-chome, Kanda-jinboucho Kanda-jinboucho (Tokyo Office) Chiyoda-ku, Tokyo 101-0051, Japan Telephone: (03) 3288-0571 Facsimile: (03) 3288-0570 Telex: 2226647 NIDEK J NIDEK INCORPORATED : 47651 Westinghouse Drive, Fremont, California 94539, 94539, U. S. A. (United States Agent) Telephone: (510) 226-5700 Facsimile: (510) 226-5750 NIDEK SOCIETE ANONYME : Europarc 13, rue Auguste Auguste Perret, 94042 94042 CRETEIL, France France (Authorized Representative) Telephone: (01) 49 80 97 97 Facsimile: (01) 49 80 32 08
June 2006 30283-P902E Printed in JAPAN
BEFORE USE, READ THIS MANUAL.
This manual contains information necessary for correct and effective operation of NIDEK Projection and Digital type Lensmeter Model LM-770, and provides procedures for operation, cautions, specification, and procedures for maintenance. In this manual, IEC 60601 is applied. The lensmeter complies with ISO 8598 (Optics and optical instruments - Focimeters). For correct use, it is necessary that this manual, in particular the operating procedures, be thoroughly understood before using this instrument. Keep the manual handy to verify use. There are no user-serviceable parts inside the instrument except lamps, fuses, printer papers pape rs and a nd ink i nk cartr cartridge idge.. If you y ou find f ind any probl problem em or o r questio qu estion n about ab out the instr instrument ument during the operation, please contact your authorized distributor. The LM-770 is calibrated with reference wavelength of 587.56 n m.
Table of Contents
§ 1
§ 2
Page INTRODUCTION INTRODUC TION ..................... ............................................ ............................................. ............................................ ...................................... ................ 1-1 1.1 Outline .................... ........................................... ............................................. ............................................ ............................................. ............................... ........ 1-1 1.2 Indications for Use .................... ......................................... .......................................... .......................................... ..................................... ................ 1-1 1.3 Classifications Classifications ..................... ........................................... ............................................ ............................................ .......................................... .................... 1-1 1.4 Symbol Information Information ....................... ............................................. ............................................ ............................................. ............................... ........ 1-2 SAFETY ...................... ............................................. ............................................. ............................................ ............................................. ............................... ........ 2-1 2.1 Operation ....................... .............................................. .............................................. .............................................. ............................................. ...................... 2-1 2.2 Storage ................... .......................................... ............................................. ............................................ ............................................. ............................... ........ 2-2 2.3 Transference ....................... .............................................. .............................................. ............................................... ........................................ ................ 2-2 2.4 Installation ...................... ............................................ ............................................ ............................................. ............................................. ........................ 2-2 2.5 Wiring Wiring ..................... ............................................ ............................................. ............................................ ............................................. ............................... ........ 2-3 2.6 After Use ..................... ........................................... ............................................ ............................................. ............................................. .......................... .... 2-4 2.7 Maintenance and Checks ................... ........................................ .......................................... ......................................... ............................. ......... 2-4 2.8 Disposal Disposal ...................... ............................................ ............................................. ............................................. ............................................ ........................... ..... 2-4 2.9 Labels ..................... ............................................ ............................................. ............................................ ............................................. ............................... ........ 2-5
§ 3 CONFIGURA CONFIGURATIONS TIONS ..................... ............................................ .............................................. .............................................. ................................ ......... 3-1 § 4 OPERATING TING PROCEDURES ..................... ............................................ .............................................. ........................................ ................. 4-1 4 OPERA 4.1 Basic Process of Operation (SPH, CYL Lenses) ................. ..................................... ..................................... ................. 4-1 4.2 Prior Measurement ..................... .......................................... ........................................... ............................................ ................................... ............. 4-4 4.2.1 Preparation .................... ........................................... .............................................. .............................................. .................................... ............. 4-4 4.2.2 How to set the lens ......................... .................................................. ................................................. ........................................ ................ 4-4 4.3 Measurement ..................... ........................................... ........................................... ........................................... ........................................... ....................... 4-5 4.3.1 Measurement of single vision lens ..................... ............................................ ............................................. ........................ 4-5 4.3.2 Measurement of ADD diopter .................... .......................................... ........................................... ............................... .......... 4-6 4.3.3 Measurement of prism refractive power .................. ....................................... ........................................ ................... 4-7 4.3.4 Measurement of hard contact lens .................... ......................................... .......................................... .......................... ..... 4-9 4.4 Marking Axis ...................... ............................................. .............................................. ............................................... ...................................... .............. 4-10 4.4.1 Making sphere lens ..................... ........................................... ........................................... ........................................... ........................ .. 4-10 4.4.2 Marking cylinder axis ....................... .............................................. .............................................. ...................................... ............... 4-10 4.4.3 Marking phoria lens ..................... ........................................... ............................................. ............................................ ..................... 4-11 4.5 Memory Function ....................... .............................................. .............................................. .............................................. .............................. ....... 4-12 4.5.1 How to memorize .................... ........................................... .............................................. .............................................. ......................... 4-12 4.5.2 How to display the contents of memory .................... ....................................... .................................... ................. 4-12 4.5.3 How to clear the memory ....................... .............................................. .............................................. ................................ ......... 4-13 4.6 Print out ..................... ............................................ .............................................. .............................................. .............................................. ......................... 4-13 4.7 Setting Step and Changing the Setting of CYL CYL Reading ................. ................................... ....................... ..... 4-14 4.7.1 How to set the step ...................... ............................................. .............................................. .......................................... ................... 4-14 4.7.2 How to set CYL reading ........................ ................................................ ................................................ ............................... ....... 4-14
Page 4.8 Auto-off Function ................................................................................................... 4-15
§ 5
MAINTENANCE ......................................................................................................... 5-1 5.1 Replace the Lamp ..................................................................................................... 5-1 5.2 Replace the Fuses ..................................................................................................... 5-2 5.3 Replace the Ink Cartridge ......................................................................................... 5-3 5.4 Replace the Printer Paper ......................................................................................... 5-4 5.5 Cleaning of Protective Glass ..................................................................................... 5-4 5.6 Cleaning Exterior ...................................................................................................... 5-5
§ 6 SPECIFICATIONS ...................................................................................................... 6-1
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§ 1
INTRODUCTION
1.1 Outline NIDEK MODEL LM-770 is a projection and digital type lensmeter which is developed for more users to use the product of high performance. This instrument projects the target brightly and sharply on the screen. Also, easy and accurate lens measurement is possible. The measurement results are shown in the data of sphere power, cylinder power, axis angle, addition (ADD) power and prism power. The features is • Measured refractive powers and axis are displayed digitally and easy to read. • By the equipment of big screen, bright and sharp target can be obtained. • Maximum measurable lens diameter is up to 100mm. • Auto-off function gives longer life time of the lamp and save energy of electricity. • Measured refractive powers and axis can be printed out. • Measured value of left and right lenses in frame can be put in memory and also can be printed out.
1.2 Indications for Use This equipment is designed to measure vertex powers and prismatic effects of spectacle and contact lens, to orientate and mark uncut lenses, and to verify the correct mounting of lenses in spectacles frames.
1.3 Classifications [Classification under the provision of 93/42/EEC(MDD)] Class I The LM-770 is classified into Class I device. [Form of protection against electric shock] Class I The LM-770 is classified as a Class I equipment. The class I equipment is an equipment in which the protection against electric shock does not rely on basic insulation only, but which includes an additional safety precaution that provides for a connection of accessible conductive parts to the protective (earth) conductor in the fixed wiring of the installation. Therefore, accessible conductive parts cannot become activated in the event of failure in the basic insulation. [Degree of protection against electric shock] Type B Applied Part The LM-770 is provided with a Type B Applied Part. The Type B Applied Part provides an adequate degree of p rotection against electrical shock, particularly regarding thefollowing: - allowable leakage currents - reliability of the protective earth ground connection (If applicable).
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[Degree of protection against liquid entry] IP20 The LM-770 is classified as a ordinary equipment (IP20), which is provided with an enclosure not completely water proof. Avoid water splash on the equipment. [Method(s) of sterilization or disinfection recommended by the manufacturer] The LM-770 does not have any part to be sterilized or be disinfected. [Degree of protection against flammability] The LM-770 is classified as an equipment not suitable to be used in a potentially flammable environment. Do not use near flammable materials. [Operation mode] The LM-770 is classified as an equipment which operates continuously.
1.4 Symbol Information This symbol on the body indicates that caution should be taken. Refer to the operator’s manual before use. This symbol indicates that the degree of protection against electrical shock of the applied part is classified as a Type B applied part. This symbol on the power switch indicates that the power is ON. This symbol on the power switch indicates that the power is OFF. This symbol means the fuse rating. This symbol indicates the input. This symbol indicates the output. This symbol indicates that the alternating current should be applied to the instrument. This symbol indicates the date of manufacture. This symbol indicates that this product shall be disposed of in a separate collection of electrical and electronic equipment in EU.
§ 2
SAFETY
In this manual, a Signal Word is used to designate a degree or level of safety alerting, whose definitions are as follows. CAUTION:
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or property damage.
Even the cases mentioned in CAUTION may result in serious injury under a certain situation. Be sure to observe the instructions of CAUTION.
2.1 Operation CAUTION • Never disassemble or touch the inside of the instrument. This may result in an electric shock or instrument malfunction. • Do not touch the lamp house cover since it is hot while a lamp is illuminated. If not, you may get burned. • Never yank the power cord to disconnect from wall outlet but hold the plug while disconnecting. This can weaken the metal core of the cord and may result in a short circuit or an electric shock. • Do not place the instrument on the power cord. The sheath of the cord becomes ragged and may cause an electric shock or a short circuit. • If the metal core of the power cord is exposed, power turns on and off by shaking the cord, or cord/plug gets so heated that one cannot hold it, it means that the cord is damaged. Immediately replace the cord. This may cause an electric shock or a fire. • Do not use the instrument for other than the intended purpose. NIDEK will not be responsible for accidents or malfunction caused by carelessness. • In the event of a malfunction, do not touch the inside of the instrument, but unplug the power cord and contact your authorized distributor.
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NOTE • Before measurement, be sure that the nosepiece is mounted correctly. Incorrect mount of the nosepiece may on accuracy of measurement.
2.2 Storage NOTE • Do not store the instrument in a place where it may get wet or where poisonous gas or liquid is stored. • Avoid storing the instrument in an area with excessive heat, humidity, or dust. To preserve the appearance or internal parts of the instrument, avoid direct exposure to sunlight.
2.3 Transference CAUTION • Never trail the power cable during the transference. The instrument may fall down and cable may break when it is stepped on or pulled. • In transference, hold the instrument surely with both hands, and take care not to bump onto other instruments, walls and others. Careless transference may cause injury or malfunction.
2.4 Installation CAUTION • Do not install the instrument near water. If water gets into the internal structure, there is the possibility of electrical shock or instrument malfunction.
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CAUTION • Install the instrument in a stable and level place where vibration or shock does not occur. The instrument may not perform observation correctly or may malfunction. Also, if the instrument is tripped over because of any accidental shock, it may result in possible injury.
NOTE • Install the instrument in the following conditions. A low dust environment A low light interference environment A vibration and shock free environment • Install the instrument in the environment whose condition can be set to the following. Use the instrument under the following temperature and humidity. Use environment Temperature : +10 to +40 ºC Humidity : 30 to 85% (non-condensing)
2.5 Wiring CAUTION • Be sure to use the wall outlet which meets the requirements of power specification. If the line voltage is too high or too low, the instrument may not give full performance. Malfunction or a fire also may occur. • Be sure to use a power outlet equipped with a grounding terminal. Otherwise, this may cause electric shock when it breaks or power leaks. • Be sure to securely plug in the power cord. Insecure connections may cause a fire. • Be sure to securely plug in the interface cable. Insecure connections may cause malfunction.
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2.6 After Use CAUTION • If the instrument is not be used for a long time, disconnect the power cord from the wall outlet. This may cause a fire.
NOTE • If the instrument will not be used during an extended period of time, turn off the main switch and put the dust cover over the instrument. If not, settled dusts may impair visibility through the instrument.
2.7 Maintenance and Checks CAUTION • As the illumination lamp can get quite hot, replace it when it is cool. If not, you may get burned.
NOTE • Disassembling for service is not permitted except at NIDEK or authorized distributor. • Never use an organic solvent such as paint thinner to wipe the exterior. This may ruin the surface.
2.8 Disposal NOTE • Follow local governing ordinances and recycling plans regarding disposal or recycling of device components. • When disposing packing materials, sort them by the materials and follow local governing ordinances and recycling plans.
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2.9 Labels The following labels provide safety information about each part.
§ 3
CONFIGURATIONS
[Fig.1 Front view]
Screen
Digital display
Prism compensator Diameter measuring scale
Lens Table
Nosepiece
Sign changeover switch +/Target rotating ring
S/C measuring changeover switch ADD diopter switch Right switch Left switch Print switch
[Fig.2 Screen & Digital display]
Target Corona target Cross line target Indicator
3-2
Screen
Target rotating ring
It is graduated with 1 prism diopter step concentric circle scale and 5º step angle scale. (Refer Fig.2)
By rotating this ring, angle of target can be changed.
Diameter measuring scale Target It is consisted from corona and cross lines targets. (Refer Fig.2)
By touching lens edge to the lens table, diameter of lens can be read.
Sign changeover switch +/Digital display Measured values of SPH (sphere), CYL (cylinder), ADD and AXIS are displayed on this part. (Refer Fig.2)
This is used when opposite cylinder value is desired to be read against the display of measured values. By pressing this switch again, it returns to original display.
Indicator In case measuring cylinder lens, it displays to which side of cross lines target is focused. (Refer Fig.2) According to this indicator, measure the lens by focusing either short or long cross lines target.
S/C measuring changeover switch
Prism compensator
ADD measuring switch
In case measuring lens with over 5 prism diopter, this prism compensator is used not to go off the target from the field of view of screen. By moving the prism compensator knob for left or right, direction of moving target is changed and by rotating the knob, moving volume is also changed.
By pressing this switch, it makes ADD measuring mode. In this mode, CYL display at digital display part is changed to ADD display.
Lens table When measuring lenses in frame, touch the top part of frame to the lens table.
Nosepiece This is a basic point of measurement, therefore special plastic material is used not to give any scratches on lens, nor to be distorted. When measuring contact lens, replace this for nosepiece of contact lens.
Each pressing this switch change the SPH or CYL measuring mode. Also returning to SPH measuring mode from ADD measuring mode or memory display mode, can be made by this switch.
Right switch Left switch These switches are used to memorize the left and right measured values in the framed lens. Also after memory, it returns to SPH measuring mode.
Print switch By pressing this switch, measured values which are displayed at digital display part, are printed out and returns to SPH measuring mode. In case measured values are in the memory, contents of memory are printed out and memory is erased. This works also as feeding printer paper by continuous pressing.
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[Fig.3 Side view]
Axis marking lever
Lens holder lever
Lens Table Lever
Diopter handle Lens holder Main switch Ink cartridge
[Fig.4 Rear view] Printer cover
Exterior interface connector
Power source connector Lamp adjusting screws
3 - 4
Axis marking lever
Lamp adjusting screws
This is used for marking axis on the lens.
After replacing lamp, if part of target becomes dark or target blurs along with flowing when in defocus, there screws are used.
Lens holder lever In the state no holding lens, raise this lever a little to release the click and down the lens holder to hold the lens. After measurement of the lens, the lever is raised up until it get click sound and fixed at upper part.
Power source connector Both fuse holders and voltage selector are provided.
Printer cover Lens holder To avoid giving scratches on the lens, plastics are provided at the tips of lens holder. After setting the lens, some movement can be made.
Ink cartridge Lens table lever Lens table moves back and forth by this lever.
Diopter handle Main switch Exterior interface connector Accessory equipment connected to the analog and digital interfaces must be certified according to the representative appropriate national standards (for example, IEC 60601-1.) Further more all configurations shall comply with the system standard IEC 60601-1-1. Everybody who connects additional equipment to the signal input part or signal output part configured a medical system, and is therefore responsible that the system complies with the requirements of the system standard IEC 60601-1-1. If in doubt, consult the technical service department or your local representative.
§ 4
OPERATING PROCEDURES
4.1 Basic Process of Operation (SPH, CYL Lenses) NOTE • Before measurement, be sure that the nosepiece is mounted correctly. Incorrect mount of the nosepiece may on sccuracy of measurement.
1. Put the main switch “ON” by pressing “ ” marked side. When focusing target, confirm that SPH value is 0.00. Also confirm that target is in the center of screen. 2. Put the lens, facing its concave side on the nosepiece. 3. Raise the lens holder lever at upper end once and then down it to hold the lens. (See Fig.5)
Fig.5
4. Turn the diopter handle target
on the screen
to make corona in sharp focus.
5. Move the lens to coincide the center target to the screen center.
* If the corona target flows, proceed to “8”.
Fig.6
4-2
6. Make fine adjustment by the diopter handle to get sharp focus of the target.
* SPH value is displayed at digital displayed part. (Refer Fig.7)
7. Press down the axis marking lever to print the marks.
* Center point shows the optical center. * Proceed to “16”.
Fig.7
8. Turn the target rotating ring and align the short cross lines target in parallel to corona flow lines. (Refer Fig.8) 9. Turn the diopter handle and make the short cross lines target in sharp focus.
Fig.8
10. Press the S/C measuring changeover switch , it changes to CYL measuring mode with beep sound.
* Display of indicator changes to “ (Refer Fig.9)
”.
Fig.9
4 -3
11. Turn the diopter handle and make the long cross lines target in sharp focus. (Refer Fig.10)
* If indicator flickers, rotate either the target or line for 90º and return to the SPH measuring mode by pressing S/C measuring changeover switch. Then proceed over again from the process “5”. However in case not mark axis, flickering indicator has nothing to do with.
Fig.10
* SPH, CYL and AXIS are displayed on the digital display . (Refer Fig.10) 12. Turn the target rotating ring and coincide the axis value displayed on digital part to the prescription value. 13. Turn the lens and coincide its focus to the long cross line target. (Refer Fig.11) 14. Coincide the lens center to the target and mark the axis by pressing down the axis marking lever.
Fig.11
15. Press the S/C measuring changeover switch , it returns to SPH measuring mode with beep sound. (Refer Fig.12) 16. Hold the lens by hand and raise the lens holder lever up until it gets click sound. 17. Remove the lens.
Fig.12
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4.2 Prior Measurement 4.2.1 Preparation 1. Power source cord is firstly connected to LM-770 and then to the socket. 2. Confirm that scale of prism refractive power on the prism compensator show “0”. (Refer Fig.13)
Scale of prism refractive power Fig.13
4.2.2 How to set the lens In case measuring lenses in frame, touch the top part of frame to the lens table and hold it by lens holder. Lens table comes out by pulling the lens table lever this side.
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4.3 Measurement 4.3.1 Measurement of single vision lens 1. Confirm that indicator shows the short lines mark ( sharp focus to the short cross lines target.
If indicator shows long lines mark (
) and turn the diopter handle to get
), change it by S/C measuring changeover switch.
Coincide center of the lens, and read SPH value on the digital display when the target is in the sharp focus. In case sphere lens, whole target get sharp focus. Then measuring is now finished. 2. If the lens astigmatism, corona target flows in a cylinder. Align the short cross lines target in parallel to the direction of flowed lines and make it in sharp focus.
Then change it to CYL measuring mode by S/C measuring changeover switch. Indicator displays long lines mark and turn the diopter handle to make the long cross lines target in sharp focus. Now read the values of SPH, CYL and AXIS on the digital display. Further reading of +/- of measured CYL value can be changed by sign changeover switch.
NOTE • While in measuring astigmatism lens, indicator may flicker. But if axis marking is not made, this has nothing to do with.
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4.3.2 Measurement of ADD diopter When measuring bifocal lens, this is used to see how much refractive power for near vision is added on the refractive power for far vision. After measuring far vision of refractive power, input refractive power of far vision by pressing ADD measuring switch and the difference is displayed by the standard basing o n it. [Process] 1. Measure the far vision part of the lens in the process stated in 4.3.1. 2. Press the ADD measuring switch.
* Lamp at ADD on digital display part is lit and it becomes ADD measuring mode. (Refer Fig.14)
Fig.14
3. Shift the lens to come its near vision part (small lens) on the nosepiece. (See Fig.15)
NOTE • When shift the lens, raise the lens holder lever a little up. Fig.15
4. Focus the cross lines target to the side shown by indicator
NOTE • If the target dose not come to the center of screen due to the effect of prism of the lens, use the prism compensator and bring the target to the center of screen to enable getting better sharp focus.
* On the digital display, SPH values for vision and ADD are displayed.
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4.3.3 Measurement of prism refractive power Measuring of prism refractive is divided in three ranges. a.
Within 5 prism diopter which can be read on the scale of screen.
b.
Range from 5 prism diopter to 15 prism diopter.
c.
Range from 15 prism diopter to 20 prism diopter. For the case of b. and c., use the prism compensator.
When measuring prism refractive power in framed lenses, let the patient wear the glass and mark the each center of pupil. Then put the lens on the nosepiece to come the mark on the center of nosepiece. a. In case range within 5 prism diopter. [Process] 1. Turn the diopter handle and make focusing of the target. 2. Read the volume of shift and direction of the target center from the center of screen.
Shifted volume in the scale of concentric circles is the prism refractive power and direction read on the angle scale is the direction of prism base. * If you turn the target rotation ring to go the center line of long cross lines target through the center of screen, then it makes easy reading of the angle scale. (Refer Fig.16)
3∆ Base 200º Fig.16
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b. In case range within 15 prism diopter. [Process] 1. Turn the diopter handle and display the expected SPH value on the digital display. 2. Operate the knob of prism compensator and bring the center of target to the center of screen.
NOTE • If the target is not in the screen, set the angle scale of prism compensator at 0º or 90º and turn the prism compensator knob. It makes easy finding the target.
3. Turn the diopter handle to focus the target. 4. Operate the prism compensator knob and coincide the center of target accurately to the center of screen. 5. By the prism refractive power scale and angle scale of prism compensator, read each prism refractive power and direction of prism base. (Refer Fig.17)
NOTE • If the scale of prism refractive power is indicated in orange color, direction of prism base is the value of angle scale plus 180º.
Fig.17
3∆ Base 70º
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c. In case range over 15 prism diopter. [Process] 1. Turn the diopter handle and display the expected SPH value on the digital display. 2. Coincide the scale of prism refractive power of prism compensator at 15 prism diopter and move the knob for left or right, target crosses in the screen. (See Fig.18) 3. Stop the movement of target when its center comes to the nearest position to the screen center and read the prism refractive power by the scale of concentric circle as stated “a”.
Fig.18
4. On this read value, 15 prism diopter of the prism compensator must be added. This total value is the prism refractive power of the measuring lens. 5. Direction of prism base is read at the angle scale of prism compensator as explained at “b”. d. In case measuring astigmatism lens with prism.
Measure both cylinder and prism refractive prism.
NOTE • By using prism compensator and bring the target in the center of screen. Then measurement can be made easily.
4.3.4 Measurement of hard contact lens Measurement of hard contact lens can not be made by using normal nosepiece. Please change it for nosepiece exclusive for contact lens.
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4.4 Marking Axis This is used show the center of optical axis (by the center of 3 points marks) and also to show direction of axis and base for cylinder lens etc.
4.4.1 Making sphere lens 1. Focus the target and adjust lens position to coincide the target center to the screen center. 2. Press down the axis marking lever and print 3 point on the lens in parallel for lens table.
4.4.2 Marking cylinder axis 1. According to the “4.1 Basic process of operation”, measure the lens. In this moment, if the indicator flickers, rotate the lens or target 90º and return to SPH measuring mode. Repeat measuring again from process “5”. 2. Turn the target and coincide the axis which displayed on digital display, to the angle of axis marking.
* In case marking on cylinder axis, coincide to “0” and in case marking on prescribed value, coincide to the prescribed value. 3. Turn the lens to focus for the long cross line target. 4. Make centering lens and press down the axis marking lever to print axis.
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4.4.3 Marking phoria lens 1. Shift the target center for the direction of prism refractive power (base direction +180º) by prism compensator. 2. Set the lens. 3. Make axis marking in the process of “4.4.1” or “4.4.2”.
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4.5 Memory Function This is the function to memorize the measured values of left and right lenses in the frame and display these data separately or print these data out continuously. Also in order to transmit the data to exterior system ophthalmic instrument, only memorized data can be transmitted. Therefore such data must be memorized in advance.
4.5.1 How to memorize Measure the lens after confirming the LED of right/left switches are “OFF”. After taking measurement, by pushing the said switches, measured data can be memorized. Also when measured value are memorized, LED is lit. * When measured value are memorized, it returns to SPH measuring mode. * Memory is one each for left and right.
4.5.2 How to display the contents of memory While in SPH measuring mode, by pressing LED lit switch RIGHT/LEFT, memorized contents are displayed. (Memory display mode) When you want to read out the result of ADD measurement, press further ADD measuring switch. Also in the case memory display mode, indicator is “OFF” and displayed side LED of the switch is flickered.
NOTE • Memory display function is only effective when it is in SPH measuring mode. In other modes, If you press the memorized switch again, contents is changed.
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4.5.3 How to clear the memory When memory is displayed, if you press the switch again, the contents of displayed memory can be erased. Also, if you press the print switch, memorized contents of both right and left can be erased. (In case including a printer, memorized contents are erased after the contents are printed out.) In case measurement is made newly, memorized data should be erased in advance and then measure.
4.6 Print out By pressing PRINT switch, measured data displayed on the digital display part are printed out. Also in case measured value are memorized by RIGHT/LEFT switches, by pressing PRINT switch memorized contents are printed out, and memorized contents are erased. Further, when printing is out, it returns to SPH measuring mode from CYL measuring mode, or ADD measuring mode, or memory display mode.
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4.7 Setting Step and Changing the Setting of CYL Reading 4.7.1 How to set the step Displayed step of refractive power can be changed by the following process. 1. Open the printer cover. 2. Refer Fig.19, put the DIP switch of No.3 “ON” makes 0.12D step and put it “OFF” makes 0.25D step.
NOTE • Do not touch other DIP switches.
3. Once put the power source switch “OFF” or press CYL measuring switch. Fig.19
4.7.2 How to set CYL reading Setting of CYL readings (Plus reading, Minus reading and Mix reading) can be made by the following process. 1. Open the printer cover. 2. Refer Fig.20 about DIP switches, CYL reading can be set by changing DIP switch position as bellows.
NOTE • Do not touch other DIP switches.
SW-1
SW-2
- Reading
ON
OFF
+ Reading
OFF
ON
Mix Reading
ON
ON
Fig.20
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4.8 Auto-off Function Auto-off function works when the lensmeter is not used about three minutes. To return, press one of any switches or rotate either diopter handle or target rotating ring. (Refer Fig.21) Memorized data are not erased even if the lensmeter is in auto-off state.
Fig.21 Auto-off state
§ 5
MAINTENANCE
5.1 Replace the Lamp 1. Put the main switch off and pull the power cord out from socket. Lamp
2. Remove the bottom lamp house cover. 3. Pull the lamp out from the lamp socket.
CAUTION • As the illumination bulb can get quite hot, replace it when it is cool. Otherwise, it may cause an injury.
4. Set the new lamp in the process of opposite order. Fig.22
Do not hold glass part of lamp by naked hand, hold it with cloth.
CAUTION • In replacement of the lamp, do not touch the inside of the instrument. An electric shock may occur.
5. After replacement of lamp, if the part of target on the screen becomes dark or target blurs with flow when it is in defocus, adjust it by turning lamp adjusting screws at the brightest.
5-2
5.2 Replace the Fuses 1. Put the main switch off and pull the power cord out from the socket. Fixing lip
2. Remove the fuse folder.
Push both sides of the fuse holder with a thin screwdriver to release the fixing lips, and pull the holder out. Fixing lip
CAUTION • The fuse holder is also used as a voltage selector. Be careful not to change the numbers show in the voltage indication window. If the voltage setting dose not match the supplied power voltage, it may cause a fire or malfunction.
Voltage indication window Fig.23
3. Replace the fuses.
Replace the fuses and set the fuse holder back into position.
CAUTION • Be sure to use the correct fuses specified on the label beside the fuse folder. • When replacing the fuses, be sure to replace both of them with the new ones. If the wrong fuses are used, the instrument may malfunction and may cause a fire. • If the fuse blows again, do not touch the internal structure. Contact your authorized distributor.
5 - 3
5.3 Replace the Ink Cartridge When markings become faint, replace the ink cartridge. Use a specified cartridge for refills. 1. Remove the C type ring by pressing a tip of the ink cartridge.
* During work, take care to prevent a possible loss of the C ring. (Using a tweezers can avoid a loss of the C ring when attaching it.)
C type ring
Fig.24
* As a spring and cartridge are fallen out when the C ring is removed, take care to prevent possible loss of them.
Marker holder
Ink cartridge Spring Fig.25
2. Remove the screw from disattached ink cartridge with a precision phillips screwdriver. 3. Attach the screw removed in preceding step to a new ink cartridge.
* The head of screw must be 0.5 - 1mm outside from the cartridge. Fig.26
4. Insert the spring and the new cartridge into the marker holder, and fit the C ring between the screw and ink cartridge.
Fig.27
Screw
5 - 4
5.4 Replace the Printer Paper When printer paper is exhausted, replace it with new one. 1. Open the printer cover. 2. The tip of printer paper is inserted through the shot. (Refer Fig.28) 3. Keep pressing PRINT switch and feed the printer paper. 4. Pass the printer paper through the exit of the printer cover and closed the cover.
NOTE Fig.28
• Once printer paper is feeded, do not pull the paper for opposite direction.
5.5 Cleaning of Protective Glass Periodically, detach the nosepiece and remove the dust and dirt on the protective glass. 1. Remove the nosepiece upward. Nosepiece
2. Blow dust off on the protective glass with a blower brush and then, wipe it off with a soft cloth or lens cleaning paper gently. Protective glass
Fig.29
5 - 5
5.6 Cleaning Exterior When the exterior parts of the instrument become dirty, wipe with a dry and soft cloth. For stubborn dirt, immerse the cloth in a neutral detergent, wring well and wipe. Finally wipe off with a dry and soft cloth.
NOTE • Never use an organic solvent such as paint thinner to clean the instrument as it may ruin the surface of the instrument.
§ 6
SPECIFICATIONS
Type
:
Projection type - Magnification 40X Digital display - Sphere, Cylinder, Axis, ADD
Measuring target
:
Cross-line and corona
: : :
0 to ±25D 0.12 or 0.25D steps
Sphere power Measuring range Measuring unit Accuracy
Values in diopters(D)
Measuring range < 0 -5 > 0 +5 < -5 -10 > +5 +10 < -10 -15 > +10 +15 < -15 -20 > +15 +20 < -20
> +20
Accuracy ± 0.06 ± 0.09 ± 0.12 ± 0.18 ±
0.25
Cylinder power Measuring range Measuring unit
: :
0 to ±9.87D 0.12 or 0.25D steps
Cylinder power
:
+, – or MIX
: :
0 to ±9.87D 0.12 or 0.25D steps
: : :
0 to 180º 1º steps ±1º
Measuring range
:
Measuring unit Accuracy
: :
0 to 5∆ 0 to 20∆ (in case using prism compensator) 1∆ steps
Addition power Measuring range Measuring unit
Cylindrical Axis angle Measuring range Measuring unit Accuracy
Prism diopter power
Values in prism diopters( )
Measuring range >0 5 >5 10
Accuracy 0.1 0.2
6-2
Prism Axis angle Measuring range Measuring unit
: :
0 to 360º 1º steps
Measurable lens diameter
:
9 to 100mm
Illumination lamp
:
6V 20W G4, Halogen lamp
: : :
100, 120, 220, 230Vac ± 10% 50/60 Hz 40VA
:
165(W)×315(D)×420(H)mm 7kg
Temperature
:
Humidity
:
+10 to +40 ºC (In usage) -40 to +70 ºC (In storage/Transference) 30 to 85 % (Non-condensing) (In usage) 10 to 100 % (In storage/Transference)
Accessories
:
Power source Voltage Frequency Power consumption
Dimensions and weight Environmental condition
Spare lamps (1 pc.) Dust cover (1 pc.) Printer paper (1 pc.) Nosepiece for contact lens (1 pc.)
