GB/T 2421-2020Environmental testing - General and guidance (English PDF)

Foreword

This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces GB/T 2421.1-2008 "Environmental testing for electric

and electronic products - General and guidance". Compared with GB/T 2421.1-

2008, the main technical changes of this Standard are as follows:

- Modify the "Introductory remark" of the previous standard and adjust it to

the "Introduction". The following clause numbers are changed accordingly

(see the Introduction; Clause 1 of the 2008 edition);

- ADD the terms "environmental test tailoring", "quality" and "useful life" (see

3.20~3.22);

- ADD an annex "Environmental test tailoring" (see Annex C).

This Standard, using translation method, is identical to IEC 60068-1:2013

"Environmental testing - Part 1: General and guidance".

China's documents which have a consistent correspondence with the

international documents normatively referenced in this Standard are as follows:

- GB/T 2423 (all parts) Environmental testing - Test methods [IEC 60068-2

(all parts)]

This Standard has made the following editorial changes:

- CHANGE the standard name to "Environmental testing - General and

guidance";

- In the Introduction, change "Test Xa: Immersion in cleaning solvents" to

"Test XA: Immersion in cleaning solvents"; change "Z/am: Combined cold

and low air pressure tests" to "Z/AM: Combined cold and low air pressure

tests";

- In Clause 3 "Terms and definitions", perfect the terms "non-heat-dissipating

specimens" and "heat-dissipating specimens" as "non-heat-dissipating

specimens ambient temperature" and "heat-dissipating specimens ambient

temperature" (see 3.9.1 and 3.9.2);

- ADD informative Annex NA "Related national standard series".

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

Technical Committee 8 on Environmental Conditions of Electric and Electronic

Products and Environmental Test of Standardization Administration of China

(SAC/TC 8).

Drafting organizations of this Standard: China National Electric Apparatus

Research Institute Co., Ltd., Shenzhen Academy of Metrology & Quality

Inspection, China Aerospace Science & Industry Defense Technology Academy,

Jiangsu Tomilo Environmental Testing Equipment Co., Ltd., 704th Research

Institute of China State Shipbuilding Corp., Ltd., Guangzhou Power Supply

Bureau Co., Ltd. Electric Power Test and Research Institute, Guangzhou

Soteria Technology Co., Ltd., Fujian Xinneng Offshore Wind Power R&D Center

Co., Ltd., Mingyang Smart Energy Group Co., Ltd., Shenzhen ORT Technical

Service Co., Ltd., Ningbo Ouzhi Electrical Technology Co., Ltd., State Grid

Heilongjiang Electric Power Co., Ltd. Electric Power Research Institute.

Main drafters of this Standard: Liu Xin, Zhu Jianhua, Li Guo, Zhang Yanjun, Xu

Xuedong, Yang Yong, Wang Yong, Wang Wei, Xie Xianbin, Zhan Yao, Mei

Liguang, Chen Rui, Zhang Liang, Li Xiaoqian, Huang Qingdan, Li Jian, Li Ying.

The previous editions of the standard replaced by this Standard were released

as follows:

- GB/T 2421-1981, GB/T 2421-1989, GB/T 2421-1999;

- GB/T 2421.1-2008.

Environmental testing - General and guidance

1 Scope

The IEC 60068 series includes a series of methods for environmental testing

along with their appropriate severities, and prescribes various atmospheric

conditions for measurements and tests designed to assess the ability of

specimens to perform under expected conditions of transportation, storage and

all aspects of operational use.

Although primarily intended for electric and electronic products, this Standard

is not restricted to them and may be used in other fields where desired.

Other methods of environmental testing, specific to the individual types of

specimen, may be included in the relevant specifications.

The framework of environmental test tailoring process is given in order to assist

the production of test specifications with appropriate tests and test severities.

The IEC 60068 series provides a series of uniform and reproducible

environmental, climatic, dynamic and combined tests, performed and

measured under standard atmospheric conditions, for those preparing

specifications and those engaged in the testing of products.

These test methods are based upon available international engineering

experience and judgement and are primarily designed to provide information

on the following properties of specimens:

a) the ability to operate within specified limits of temperature, pressure,

humidity, mechanical stress or other environmental conditions and

combinations of these conditions;

b) the ability to withstand conditions of transportation, storage and

installation.

Note 1: The IEC 60721 series provides a system for classification of environmental

conditions and gives relevant definitions.

The tests in this Standard permit the comparison of the performance of sample

products. To assess the quality or useful life of a given production lot, the test

methods should be applied in accordance with a suitable sampling plan and

may be supplemented by appropriate additional tests, if necessary.

Note 2: ISO defines "quality" as the degree to which a set of inherent characteristics fulfils

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