GB/T 2423.8-1995 English PDF (GBT2423.8-1995)

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GB/T 2423.8-1995: Environmental testing for electric and electronic products - Part 2: Test methods - Test Ed: Free fall
GB/T 2423.8-1995
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC 621.3.620.178
K 04
idt IEC 68-2-32.1990
Replacing GB 2423.8-81, GB 2424.6-81
Environmental testing for electric and electronic
products - Part 2. Test methods - Test Ed. Free fall
ISSUED ON. AUGUST 29, 1995
IMPLEMENTED ON. AUGUST 1, 1996
Issued by. National Technical Supervision Bureau of China
Table of Contents
Foreword ... 3 
IEC Foreword ... 5 
1 Purpose ... 6 
2 Test conditions ... 6 
3 Severity level ... 7 
4 Initial measurement ... 7 
5 Condition test ... 7 
6 Final measurement ... 7 
7 Information to be included in relevant specification ... 7 
8 Purpose ... 8 
9 General description ... 8 
10 Description of test equipment ... 8 
11 Severity level ... 8 
12 Initial measurement ... 9 
13 Condition test ... 9 
14 Final measurement ... 9 
15 Information to be included in relevant specification ... 9 
Annex A (standard) Test equipment ... 10 
Annex B (standard) Guidelines ... 12 
Foreword
This Standard identically adopts International Electrotechnical Commission
Standard IEC 68-2-32 (Edition 2 of 1975) Basic Environmental Testing
Procedures Part 2. Tests - Test Ed. Free fall, Amendment 1 of 1982 and
Amendment 2 of 1990.
In this way, this national Standard is the same as the international standard so
as to meet the needs of international trade, technology and economic
exchanges.
This Standard replaces GB 2423.8-81 "Electric and electronic products - Basic
environmental test regulations for electricians - Test Ed. The free falling
method" and GB 2424.6-81 "Electric and electronic products - Basic
environmental test regulations for electricians - Test Eb. The collision method".
GB 2423.8-81 and GB 2424.6-81 were drafted based on IEC 68-2-32 (Edition
2 of 1975) Basic Environmental Testing Procedures Part 2. Tests - Test Ed.
Free fall.
This Standard is identical to IEC 68-2-32 (Edition 2 of 1975), Amendment 1 of
1982 and Amendment 2 of 1990 in technical content, formatting and rules. The
main changes in this Standard and the previous edition are as follows.
- combined GB 2423.8 and GB 2424.6 into one standard GB/T 2423.8;
- according to the two revisions to IEC 68-2-32 in 1982 and 1990, modified
Annex A and Method Two, supplemented Annex B.
The following four standards and this Standard are the scope of the impact test.
The relevant specifications shall be based on the use of the product and the
specific circumstances of the transport to select the appropriate test method
(see Annex B).
- GB/T 2423.5-1995 Environmental testing for electric and electronic
products Part 2. Test methods Test Ea and guidance. Shock
- GB/T 2423.6-1995 Environmental testing for electric and electronic
products - Part 2. Test methods - Test Eb and guidance. Bump
- GB/T 2423.7-1995 Environmental testing for electric and electronic
products - Part 2. Test methods Test Ec and guidance. Drop and topple
Primarily for equipment-type specimens
- GB 2423.39-90 Basic environmental testing procedures for electric and
electronic products - Test Ee. Bounce
Environmental testing for electric and electronic
products - Part 2. Test methods - Test Ed. Free fall
Introduction
This test is divided into two methods. The first method is usually used to
simulate the free fall that the unpackaged product may undergo during handling.
The sample is usually dropped from the specified height to the prescribed
surface twice in the prescribed posture. The second method is often used to
simulate the repeated free fall that a connector attached to a cable, a small
remote-controller, etc. may experience during use. Repetitively drop the test
sample from the prescribed height onto the prescribed surface. It is achieved
by using suitable equipment such as a (rotating) drum.
Method One. Free Fall
1 Purpose
To determine the adaptability of the product intended to fall due to rough
loading-unloading during handling or to determine the minimum level of security
required for safety.
This test is mainly used for non-packaged test samples, and test samples that
can be packaged as part of the sample in the transport box.
2 Test conditions
2.1 Test surface
The test surface shall be a smooth, hard, rigid surface made of concrete or steel.
When necessary, relevant regulations may specify other surfaces.
2.2 Height of fall
It refers to the height between the test surface and the sample location closest
to it when the test sample is suspended before falling.
2.3 Method of release
The method of releasing the test sample shall allow the test sample to fall freely
from the suspended position. When releasing, minimize interference.