GB/T 2423.54-2005 English PDF (GBT2423.54-2005)

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GB/T 2423.54-2005: Environmental testing for electric and electronic products - Part 2: Test methods - Test Xc: Fluid contamination
GB/T 2423.54-2005
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.040
K 04
GB/T 2423.54-2005 / IEC 60068-2-74:1999
Environmental testing for electric and electronic products -
Part 2: Test methods - Test Xc: Fluid contamination
(IEC 60068-2-74:1999, Environmental testing - Part 2: Tests - Test Xc: Fluid
contamination, IDT)
ISSUED ON: JANUARY 18, 2005
IMPLEMENTED ON: JUNE 01, 2005
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Test fluid ... 4 
4 Specimen ... 6 
5 Cleaning ... 6 
6 Initial examination ... 6 
7 Testing ... 7 
8 Occasional contamination (class A) ... 7 
9 Intermittent contamination (class B) ... 7 
10 Extended contamination (class C) ... 8 
11 Final examination ... 8 
12 Information to be given in the relevant specification ... 9 
Annex A (Informative) Guidance on the choice of test fluids and specimens ... 10 
Foreword
This Part is a part of GB/T 2423 “Environmental testing for electric and electronic
products”. This Part identically adopts IEC 60068-2-74:1999 “Environmental testing -
Part 2: Tests - Test Xc: Fluid contamination” (English version).
The technical content of this Part is same with IEC 60068-2-74:1999 “Environmental
testing - Part 2: Tests - Test Xc: Fluid contamination” (English version). The writing
format and expression way are in accordance with relevant provisions of GB/T 1.1-
2000 and GB/T 20000.2-2001.
For ease of use, the following editorial modifications are made to this Part of IEC
60068-2-74:1999:
a) to be consistent with the names of GB/T 2423 standards, this Part uses the Chinese
translation of the name of IEC 60068-2-74:1999, that is, “Environmental testing
for electric and electronic products - Part 2: Test methods - Test Xc: Fluid
contamination”;
b) deleted the foreword of IEC 60068-2-74:1999.
Annex A of this Part is informative.
This Part was proposed by Ministry of Information Industry of the People's Republic
of China.
This Part shall be under the jurisdiction of National Technical Committee on Electrical
and Electronic Products Environmental Technology of Standardization Administration
of China.
The drafting organizations of this Part: The Fifth Electronic Research Institute of the
Ministry of Information Industry.
Main drafters of this Part: Wang Zhong, Wang Xiaohan, Li Zhangpei.
Environmental testing for electric and electronic products -
Part 2: Test methods - Test Xc: Fluid contamination
1 Scope
This Part of GB/T 2423 gives a method of test which provides a standard procedure to
determine the ability of components, equipment or their constituent materials,
hereinafter referred to as specimen, to withstand accidental contact with fluids, without
being unacceptably affected.
The fluids listed in Part are representative of those commonly encountered in
operational applications. It is not intended that a specimen should be exposed to all, or
even any of them. Nor is the list intended to be complete; fluids not listed and for which
a test is appropriate should be included in the relevant specification. Guidance is given
in annex A on the choice of test fluids, specimens and severities.
These tests are not intended to demonstrate the suitability of components or equipment
to perform in continuous contact with a fluid, e.g., an immersed fuel pump. Nor are
they a test to demonstrate immunity from electrolytic corrosion.
2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this part of GB/T 2423. For dated references, subsequent
amendments to, or revisions of, any of these publications do not apply. However, parties
to agreements based on this Part are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies.
ISO 1817:1985, Rubber, vulcanized - Determination of the effect of liquids
3 Test fluid
3.1 Specification of test fluid
The relevant specification (see clause 12) shall specify the required test fluids which
shall wherever possible be selected from the list given in table 1. Each fluid has been
specified as being representative of a group of fluids. (See clause A.2.)
The relevant specification shall also specify any additional fluids not listed in table 1