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JJG 892-2022 English PDF

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Q: Should I purchase the latest version JJG 892-2022?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 892-2022 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$509.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 892-2022: Eye Refractometers
Status: Valid

JJG 892: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 892-2022	509	Add to Cart	4 days	Eye Refractometers	Valid
JJG 892-2011	799	Add to Cart	4 days	Verification Regulation of Eye Refractometers	Obsolete
JJG 892-2005	719	Add to Cart	5 days	Eye Refractometers	Obsolete
JJG 892-1995	279	Add to Cart	3 days	Verification Regulation of Refractometers	Obsolete

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JJG 249 JJG 404 JJG 134

Basic data

Standard ID: JJG 892-2022 (JJG892-2022)
Description (Translated English): Eye Refractometers
Sector / Industry: Metrology & Measurement Industry Standard
Word Count Estimation: 23,259
Date of Issue: 2022-06-28
Date of Implementation: 2022-12-28
Issuing agency(ies): State Administration for Market Regulation

JJG 892-2022: Eye Refractometers

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Eye Refractometers National Metrology Verification Regulations of the People's Republic of China Optometry Released on 2022-06-28 2022-12-28 Implementation Released by the State Administration for Market Regulation Refractometer Verification Regulations Replace JJG 892-2011 Responsible unit. National Medical Metrology Technical Committee Main drafting unit. China Institute of Metrology Participated in the drafting unit. Shanghai Institute of Metrology and Testing Technology Hangzhou Institute of Quality and Technical Supervision and Inspection This regulation entrusts the National Medical Metrology Technical Committee to be responsible for interpretation The main drafters of this regulation. Hong Baoyu (National Institute of Metrology) Li Fei (National Institute of Metrology) Participating drafters. Zhu Jianping (National Institute of Metrology) Guan Xin (Shanghai Institute of Metrology and Testing Technology) Zheng Ru (Hangzhou Institute of Quality and Technical Supervision and Inspection)

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 terms(1) 4 Overview(2) 4.1 Use(2) 4.2 Measuring principle(2) 5 Metrological performance requirements (3) 5.1 Zero indication error (3) 5.2 Indication error of spherical mirror power (3) 5.3 The measurement repeatability of objective refractor spherical power (3) 5.4 Indication Error of Cylinder Lens Axis Position of Objective Refractometer (3) 5.5 Indication error of cylinder power of objective refractometer (3) 5.6 Indication error of pupillary distance of objective refractometer (4) 5.7 Exit pupil illuminance(4) 5.8 Indication error of corneal curvature radius (4) 5.9 Measurement repeatability of corneal radius of curvature (4) 5.10 Indication error of corneal diopter (4) 5.11 Indication error of corneal axial position (4) 6 General technical requirements (5) 6.1 Appearance(5) 6.2 Measuring range(5) 6.3 Scale interval(5) 6.4 Operator eyepiece (if applicable) (5) 7 Measuring Instrument Control(5) 7.1 Test conditions (5) 7.2 Verification items (6) 7.3 Verification method (6) 7.4 Processing of verification results (10) 7.5 Verification cycle (10) Appendix A Recommended format for original record of refractometer (11) Appendix B Refractometer Verification Certificate and Inner Page Format of Verification Result Notification (15)

Introduction

JJF1002 "Rules for Writing National Metrology Verification Regulations", JJF1001 "General Metrology Terms and Definitions", JJF1059.1 "Assessment and Expression of Measurement Uncertainty" together constitute the basic series supporting the revision of this regulation specification. refractometers), JJG 922-2008 "Refractometer Vertex Standard", JJG 1011-2018 "Corneal Curvature JJG 892-2011 is revised based on JJG 1088-2019 "Measurement Standards for Keratometers" of. Compared with JJG 892-2011, except for editorial modifications, the main technical changes are as follows. --- In terms and units of measurement, terms such as keratometer and keratometer measurement standard are improved, Added corneal diopter term; --- In the overview, the description of the refractometer with keratometer function is added; --- In the measurement requirements, the measurement requirements for refractometers with keratometer function have been improved; ---In the general technical requirements, the general requirements for refractometers with keratometer function are added; --- In the control of measuring instruments, the requirements for the measuring standard for keratometers and the content of the verification item table have been improved content, and the verification method of the refractometer with keratometer function; ---Improve the original record format of the refractometer and the recommended format of the inner page of the test certificate/test result notification; --- Deleted the measurement uncertainty evaluation of the test results of the spherical power indication error of Appendix C of the objective refractor. Previous releases of this regulation. ---JJG 892-2011; ---JJG 892-2005; ---JJG 892-1995. Refractometer Verification Regulations

1 Scope

This regulation is applicable to the initial verification, follow-up verification and in-use inspection of various subjective and objective refractometers.

2 References

This procedure references the following documents. JJG 922 Refractometer Vertex Standard JJG 1011 Keratometer JJG 1088 Measurement standard for keratometer For dated references, only the dated version applies to this regulation; for undated references document, its latest version (including all amendments) applies to this regulation.

3 terms

It is a measurement standard for testing technical indicators such as spherical power, cylinder power, cylinder axis position and interpupillary distance of various refractometers. Optometry The vertex standard is divided into subjective standard and objective standard. A measuring standard for testing the spherical power of subjective refractometers. The vertex standard lens is used by the subjective standard through the special It is formed by matching the interface with the sight tube. The special standard lens for testing the spherical power of the subjective refractor, which is the standard value of the spherical power provided by the tested optometry The standard value of its own vertex is equal in value and opposite in sign. It is a measurement standard for testing technical indicators such as spherical power, cylinder power, cylinder axis position, and interpupillary distance of objective refractometers. It consists of an objective standard simulated eye, a cylinder standard, and a refractor pupillary distance standard. objective eye simulation A standard simulated eye for testing the spherical power of an objective refractor. It is a measurement standard for verifying the cylinder degree and cylinder axis position of objective refractometer. Eye and axis controllers simulated by cylinder mirrors composition. pupil distance standard A measurement standard for verifying the interpupillary distance measurement function of an objective refractor. 3.8 ophthalmometer; keratometer An instrument for measuring the radius of curvature, corneal diopter and axial position of the human eye. Typically, the instrument measures the angle ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 892-2022_English be delivered?

Answer: Upon your order, we will start to translate JJG 892-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 892-2022_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 892-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version JJG 892-2022?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 892-2022 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.