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Huvitz CRK-8800 User Manual

Huvitz CRK-8800
58 pages
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Service Manual
Auto Ref/Keratometer CRK-8800
Ver 1.0
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Huvitz CRK-8800 Specifications

General IconGeneral
Corneal RefractionYes
Corneal AstigmatismYes
Axis0° to 180°
Measurement Resolution0.01D
TypeAuto Refractor Keratometer
Measurement Range (Cylindrical)0D to ±12D
Pupil Diameter Measurement Range2.0 mm to 8.0 mm
PD Measurement Range40 mm to 80 mm
Minimum Pupil Diameter2mm
Measurement Accuracy±0.25D
DisplayLCD
Power SupplyAC 100V to 240V, 50/60Hz

Summary

Introduction

Safety Information

Safety Overview and Notices

General overview of safety, warnings, notes, and cautions for equipment operation.

Safety Symbols

Explanation of IEC safety symbols used for medical electronic equipment and potential hazards.

Environmental Considerations

Guidelines for avoiding adverse environments for operation and storage of the equipment.

Detailed Safety Precautions

Detailed precautions for safe operation, handling, and maintenance of the equipment.

Product Outline

Main Parts Identification

Identification and description of the main physical components of the Auto Ref/Keratometer.

Optical System Overview

Diagram and list of optical components within the Auto Ref/Keratometer.

Optical Component List

Detailed list of all optical components with their corresponding numbers and functions.

System Light Paths

Explanation of the different light paths within the optical system for various functions.

Electrical System

System Functional Block Diagram

System functional block diagram illustrating the electrical connections and components.

Power Input Block Diagram

Block diagram detailing the power input and distribution within the equipment.

Main Board Wiring Diagram

Diagram showing the wiring connections on the Main Board of the device.

Base IO Interface Board Diagram

Diagram of the Base IO Interface Board with connector layout.

IO Board Harness Connections

Details of wire harness connections for the IO Board.

Motor Interface Board Details

Layout diagram and harness connections for the Motor interface board.

Main Board PCB Layout

Visual representation of the Main Board PCB with labeled components.

Mode Setting

Principles of Measurement

Refractometry Measurement Principle

Explanation of how refractometry measurements are performed using light and camera.

Keratometry Measurement Principle

Details on how keratometry measurements are conducted using ring light projection.

Retro-Illumination Observation Principle

Explains how incident light is scattered back for observation of eye structures.

Repair Standard

Checking and Control Procedures

Procedures for checking and controlling the equipment's operational status.

Changing Refractometry Units

Steps to change the unit of measurement for refractometry data to 0.01.

Adjusting Eye Fixation Target Origin

Procedure to find and set the '0D' position for the eye fixation target.

Checking REF Setup Data

Guide to verifying the stored setup data for the REF model eye.

Modifying REF Measured Value

Steps to adjust and re-measure REF data to ensure accuracy within tolerance.

Checking KER Setup Data

Procedure for checking the stored setup data for the KER model eye.

Modifying KER Measured Value

Process to adjust KER data for accuracy within measurement tolerance.

Adjusting Auto Start Function

Procedure for adjusting parameters for the auto start function of the device.

OS Program Upgrade Procedure

Instructions for upgrading the device's Operating System program.

Disassembly and Assembly Overview

General guidelines for safely disassembling and reassembling the equipment.

Removing Covers and Head Rest

Steps to remove the outer covers and head rest assembly.

Removing Optical Head Assembly 1

Procedure to remove the first part of the optical head assembly.

Removing Optical Head Assembly 2

Procedure to remove the second part of the optical head assembly.

Removing Base Components

Steps to remove the base, moving base, PD Encoder, and PI Sensor Assy.

Removing Pole and Lock Assemblies

Procedure to remove Y-Pole, User Lock, Joystick, and PD Assy.

Removing Fixing Base Assembly

Steps to remove the fixing base assembly.

Troubleshooting

Electrical Issues Troubleshooting

Troubleshooting common electrical issues like power lamp not lighting.

LCD Monitor Issues Troubleshooting

Troubleshooting issues with the LCD monitor display, such as brightness or movement.

Measurement Errors Troubleshooting

Troubleshooting common measurement errors and failures.

Printer Problems Troubleshooting

Troubleshooting common printer issues like no printing or paper feed errors.

Other Troubleshooting Cases

Troubleshooting for miscellaneous issues not covered in other categories.

Technical Materials

Fogging Method Explained

Explanation of the Fogging Method for measuring refractive power and reducing errors.

Vertex Distance (VD) Impact

Explanation of Vertex Distance and its influence on refraction power correction.

Cylinder Form Variations

Description of the three types of cylinder forms for displaying measurement data.

Axis Representation

Explanation of how the axis is expressed counterclockwise from the ear side.

Pupillary Distance (PD) Definition

Definition of Pupillary Distance (PD) and average values for different genders.

Eyeball Diagram Interpretation

How to print and interpret the eyeball diagram for REF measurement results.

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