GB/T 2423.39-2018Environmental testing - Part 2: Test methods - Test Ee and guidance: Loose cargo testing including bounce (English PDF)

Foreword

GB/T 2423 "Environmental testing - Part 2.Test methods - Test Ee and

guidance. Loose cargo testing including bounce" is divided into several parts

according to the test methods.

This Part is Part 39 of GB/T 2423.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB/T 2423.39-2008 "Environmental testing for electric and

electronic products - Part 2.Tests - Test Ee. Bounce". Compared with GB/T

2423.39-2008, the main technical changes in this Part are as follows.

- change the standard's name;

- allow bulk cargo testing in a more general sense; no longer correspond to

special testing machines; allow the use of any suitable equipment; sine

and random vibration can be used; rotating table movement test is listed

in Annex A as a historical method;

- add Clause 9 "Recovery" and Clause 12 "Information to be given in the test

report";

- delete Figure 3; adjust Figure 1 and Figure 2 to Annex A; add typical

reference point position icon in Figure A.1;

- Annex A is modified from "informative" to "normative";

- Annex B is changed in the form of tables; delete the comparison with Test

Eb and Test Ed Method 1 and Method 2.

This Part uses translation method to identically adopt IEC 60068-2-55.2013

"Environmental testing - Part 2-55.Tests - Test Ee and guidance - Loose cargo

testing including bounce".

The Chinese documents which have consistency with the international

normative references in this Part are as follows.

- GB/T 2421.1-2008, Environmental testing for electric and electronic

products - General and guidance (IEC 60068-1.1988, IDT);

- GB/T 2423.10-2008, Environmental testing - Part 2.Test methods - Test Fc.

Vibration (sinusoidal) (IEC 60068-2-6.1995, IDT);

- GB/T 2423.56-2006, Environmental testing for electric and electronic

products - Part 2.Test methods - Test Fh. Vibration, broad-band random

(digital control) and guidance (IEC 60068-2-64.1993, IDT);

- GB/T 2423.58-2008, Environmental testing for electric and electronic

products - Part 2.Test methods - Test Fi. Vibration - Mixed mode (IEC

60068-2-80.2005, IDT).

This Part made the following editorial modifications.

- change the standard's name to "Environmental testing - Part 2.Test

methods - Test Ee and guidance. Loose cargo testing including bounce";

- change the min-1, which represents the speed per minute in IEC 60068-2-

55.2013, to the domestically accepted r/min;

- correct the corresponding clause number of item i) in Clause 11 from

"Clause 9" to "Clause 10".

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

Technical Committee on Environmental Conditions and Environmental Tests for

Electrical and Electronic Products of Standardization Administration of China

(SAC/TC 8).

The drafting organizations of this Part. The Fifth Institute of Electronics of the

Ministry of Industry and Information Technology, Chongqing Saibao Industrial

Technology Research Institute, Guangzhou Intelligent Equipment Research

Institute Co., Ltd., Nanjing Saibao Industrial Technology Research Institute,

China Saibao (East China) Laboratory, Wuhu Saibao Information Industry

Technology Research Institute Co., Ltd.

Main drafters of this Part. Guo Zhenhua, Yangchuan, Cheng Debin, Zhang Rui,

Jie He, Clock, Hu Bo, Hou Weiguo.

Versions of standard substituted by this Part are.

- GB/T 2423.39-1990, GB/T 2423.39-2008.

Environmental testing - Part 2.Test methods - Test Ee

and guidance. Loose cargo testing including bounce

1 Scope

This Part of GB/T 2423 provides a standard procedure for determining the

ability of a specimen to withstand specified severities of bounce, e. g. when

transported as loose cargo on wheeled vehicles.

2 Normative references

The following referenced documents are indispensable for the application of

this document. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any

amendments) applies.

IEC 60068-1, Environmental testing - Part 1.General and guidance 1

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

standard acceleration due to the earth's gravity, which itself varies with altitude

and geographical latitude

4 Requirements for the test apparatus

The testing machine shall consist of a horizontal platform coupled to a shaker

or a similar drive mechanism. If prescribed by the relevant specification, special

bounce testing machines may be used (see Clause A.3).

The testing machine shall be installed so that at its lowest point (bottom dead

centre of the motion), the platform is horizontal within the following tolerance.

- +/-0.5° in the longitudinal and lateral axes (respectively pitching and rolling

angles).

5 Severities

NOTE. Severity is described by the motion of the platform and the testing duration.

If random vibration is required, the relevant specification should refer to IEC

60068-2-64 and prescribe the ASD spectrum of the motion together with the

test duration.

6 Preconditioning

If the relevant specification calls for preconditioning it shall then prescribe the

conditions.

7 Initial measurements and functional performance test

The specimen shall be submitted to visual, dimensional, functional and any

other checks as prescribed by the relevant specification.

8 Testing

The specimen, with or without its transport case or packaging as required by

the relevant specification, is placed in the middle of the platform without being

fixed.

9 Recovery

It is sometimes necessary to provide a period of time after testing and before

final measurements in order to allow the specimen to attain the same conditions,

for example of temperature, as existed for the initial measurements.

10 Final measurements

The specimen shall be submitted to visual, dimensional and functional checks

and any others as prescribed by the relevant specification.

11 Information to be given in the relevant specification

When this test is included in a relevant specification, the following details shall

be given as far as they are applicable.

12 Information to be given in the test report

As a minimum, the test report shall show the following information.

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