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GB/T 20968-2007Non-destructive testing -- Aids to visual inspection -- Selection of low-power magnifiers (English PDF)

无损检测目视检测辅助工具低倍放大镜的选用

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

Level / Type

National · Recommended

Issue date

July 2, 2007

Implementation date

December 1, 2007

Scope

GB/T 20968-2007 is the English-translated version of 无损检测目视检测辅助工具低倍放大镜的选用.

GB/T 20968-2007 — This standard specifies the following types of low- power magnifiers features. And recommended choice for surface testing. Single magnifying lens, typically four times amplification rate (A -type).

Multi- piece mirror magnifying glass, typical amplification rate of 10 times (B type). Dual system member magnifier, typically 15 times amplification rate (C -type), the following two types: a) the binoculars usually have long working distance (C. 1 type), b) Binocular ", with fine or other accessories for stereoscopic viewing (C.

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Document preview — GB/T 20968-2007

National Standard of the People's Republic of China

ICS: 19.100
Classification: J 04

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

What this standard covers1
Document data2

What this standard covers

This standard specifies the following types of low- power magnifiers features. And recommended choice for surface testing. Single magnifying lens, typically four times amplification rate (A -type). Multi- piece mirror magnifying glass, typical amplification rate of 10 times (B type). Dual system member magnifier, typically 15 times amplification rate (C -type), the following two types: a) the binoculars usually have long working distance (C. 1 type), b) Binocular ", with fine or other accessories for stereoscopic viewing (C. 2 type) concave lens magnifying glass, fitted with a front surface mirrors, six times the rate of a typical amplification (D -type) this standard does not involve: watchmaker set in the orbital loupe and glasses, a lens or magnifying lens holder can be placed on a single subject surface mirror, spherical or cylindrical lens loupe (a magnifying glass for a variety of points, including with the scale of measurement), filled with liquid, liquid plastic lens capsule, for the inner surface inspection loupe.

Document data

International classification (ICS): 19.100.

Chinese classification (CCS): J04.

Estimated length of the Chinese original: 9,926 words.

Adopted international standard: ISO 3058-1998, IDT.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.

Referenced standards

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