GB/T 40117-2021Non-destructive testing - Evaluation of vision acuity of NDT personnel (English PDF)

Foreword

This document is drafted in accordance with GB/T 1.1-2020 "Directives for

standardization - Part 1: Rules for the structure and drafting of standardizing

documents".

This document, using translation method, is identical to ISO 18490:2015 "Non-

destructive testing - Evaluation of vision acuity of NDT personnel".

China's document which has a consistent correspondence with the international

document normatively referenced in this document is as follows:

- GB/T 9445-2015 Non-destructive testing - Qualification and certification of

NDT personnel (ISO 9712:2012, IDT)

Attention is drawn to the possibility that some of the elements of this document

may be the subject of patent rights. The issuing authority of this document shall

not be held responsible for identifying any or all such patent rights.

This document was proposed by and shall be under the jurisdiction of National

Technical Committee 56 on Non-destructive Testing of Standardization

Administration of China (SAC/TC 56).

Drafting organizations of this document: CRRC Qishuyan Institute Co., Ltd.,

Shanghai Research Institute of Materials, Science and Technology Consulting

Service Department of Shanghai Mechanical Engineering Society.

Main drafters of this document: Wan Shengyun, Song Fei, Jiang Jiansheng,

Zheng Xiaokang, Zhang Wenxian, Sang Jinpeng, Wu Gang.

Non-destructive testing -

Evaluation of vision acuity of NDT personnel

1 Scope

This document specifies the form of the optotype, the quality requirements for

the chart, the test procedure, and the acceptance level for near vision acuity of

NDT personnel. It also addresses the qualification requirements for personnel

permitted to carry out the test.

This document only addresses near vision acuity under defined conditions

similar to those encountered during routine NDT inspection. It does not address

an individual's overall visual acuity and users are advised to consider the need

for a general eye examination by specialist medical personnel to ensure general

vision acuity is appropriate for job function.

This document does not address colour vision requirements.

2 Normative references

The contents of the following documents, through normative references in this

text, constitute indispensable provisions of this document. Among them, for

dated references, only the edition corresponding to that date applies to this

document. For undated references, the latest edition (including all amendments)

applies to this document.

ISO 9712 Non-destructive testing - Qualification and certification of NDT

personnel

EN 4179 Aerospace series - Qualification and approval of personnel for non-

destructive testing

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 9712

and EN 4179 and the following apply.

3.1

Optotype

......