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GB/T 2423.2-2008 English PDF (GBT2423.2-2008)

GB/T 2423.2-2008 English PDF (GBT2423.2-2008)

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GB/T 2423.2-2008: Environmental testing for electric and electronic products - Part 2: Test methods - Tests B: Dry heat
GB/T 2423.2-2008
Environmental testing for electric and electronic products - Part 2. Test methods - Tests B. Dry heat
ICS 19.040
K04
National Standards of People's Republic of China
GB/T 2423.2-2008/IEC 60068-2-2.2007
Replace GB/T 2423.2-2001
Environmental testing of electrical and electronic products
Part 2. Test methods
Test B. High temperature
(IEC 60068-2-2.2007, Environmentaltesting-
Part 2-2. Tests-TestB. Dryheat, IDT)
2008-12-30 released.2009-10-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Content
Foreword I
1 range 1
2 Normative references 1
3 Terms and Definitions 1
4 Comparison of test methods for non-heat-dissipation test samples and heat-dissipation test samples 2
5 Test Description 3
6 Test procedure 4
7 Relevant specifications should give information 6
8 Information to be given in the test report 6
Appendix NA (informative) Component 8 of the GB/T 2423 standard
Appendix NB (informative) Test A. Low temperature and test B. relationship between high temperature classification code lowercase letters 11
GB/T 2423.2-2008/IEC 60068-2-2.2007
Foreword
GB/T 2423.2 is the second part of the GB/T 2423 standard, and the components of the GB/T 2423 standard are listed in the informative appendix NA.
This part is equivalent to IEC 60068-2-2.2007 "Environmental Test Part 2-2. Test Test B. Dry Heat" (English version).
Compared with IEC 60068-2-2.2007, this part mainly made the following editorial changes.
--- The name of this section was changed to. "Environmental Testing of Electrical and Electronic Products - Part 2. Test Method Test B. High Temperature";
--- The word "this standard" was changed to "this part";
--- Removed the preface to IEC 60068-2-2.2007;
--- Removed the introduction of IEC 60068-2-2.2007, and translated its contents into the content of the additional informative Appendix NB;
--- Added the informative appendix "components of the GB/T 2423 standard" (see Appendix NA);
--- Added the informative appendix "Test A. Low Temperature and Test B. Relationship between Lowercase Letters of High Temperature Classification Codes" (see Appendix)
NB);
--- Removed "for non-heat-dissipation test samples," in paragraph 1 of Chapter 1.
--- Chapter 2 of the list of normative references adds a reference to GB/T 2423.22;
---4.3 title "temperature change and temperature gradient test application comparison" changed to "temperature gradient test";
---6.8.2 The title "absolute humidity" was changed to "humidity".
For the sake of clarity, the above changes have been added to the corresponding position in the text.
This part replaces GB/T 2423.2-2001 "Electrical and Electronic Products Environmental Test Part 2. Test Method Test B. High Temperature",
In comparison, the main changes are as follows.
--- Removed the high temperature test of test Ba. non-heating test sample temperature mutation;
--- Removed the high temperature test of test Bc. sudden change in temperature of the heat test sample;
--- Removed Appendix A, Appendix B, Appendix C, Appendix D, Appendix E, Appendix F;
--- Added Test Be. High temperature test for temperature gradient of heat test sample---The test sample was energized throughout the test.
Appendix NA and Appendix NB of this part are informative annexes.
This part is proposed and managed by the National Technical Committee for Environmental Conditions and Environmental Testing Standardization of Electrical and Electronic Products (SAC/TC8).
This part is drafted by Guangzhou Electric Apparatus Research Institute.
The main drafters of this section. Zhang Zhiyong.
The previous versions of the standards replaced by this section are.
---GB/T 2423.2-1981, GB/T 2423.2-1989, GB/T 2423.2-2001.
GB/T 2423.2-2008/IEC 60068-2-2.2007
Environmental testing of electrical and electronic products
Part 2. Test methods
Test B. High temperature
1 range
The high temperature test specified in this part of GB/T 2423 is applicable to non-heat and heat test samples. Test Bb and test Bd and early
There is no substantial difference in the version 1).
1) The original IEC 60068-2-2.2007 has “for non-heat-dissipation test samples” before the sentence.
The purpose of this high temperature test is limited to the ability to determine the use, transport or storage of components, equipment or other products in high temperature environments.
This high temperature test cannot be used to evaluate the ability of the test sample to withstand temperature changes and the ability to operate in a temperature changing environment.
In case of this, GB/T 2423.22 should be used.
The high temperature test method is subdivided into the following types.
--- Non-heat dissipation test sample high temperature test.
● Test Bb, temperature gradient.
--- Heat test sample high temperature test.
● Test Bd, temperature gradient;
● Test Be, temperature gradient, test sample is energized throughout the test.
The test methods given in this section are typically used for test samples that are temperature stable during the test.
2 Normative references
The terms in the following documents become the provisions of this part by reference to this part of GB/T 2423. Quotations with dated
And all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouragement is achieved in accordance with this section.
The parties to the agreement study whether the latest versions of these documents can be used. For undated references, the latest edition applies to this
section.
GB/T 2421 Environmental testing of electrical and electronic products - Part 1. General (GB/T 2421-1999, idt IEC 60068-1.1988)
GB/T 2422 Environmental Test Terminology for Electrical and Electronic Products (GB/T 2422-1995, eqv IEC 60068-5-2..1990)
GB/T 2423.22 Environmental testing of electric and electronic products - Part 2. Test methods Test N. Temperature change (GB/T 2423.22-
2002, IEC 60068-2-14. 1984, IDT)
GB/T 2424.1 Environmental testing for electric and electronic products - Guide to high temperature and low temperature test (GB/T 2424.1-2005, IEC 60068-3-
1.1974, IDT)
GB/T 2424.5 Electrical and electronic products environmental test temperature test chamber performance confirmation (GB/T 2424.5-2006, IEC 60068-
3-5.2001, IDT)
GB/T 2424.7 Measurement of temperature test chambers for environmental test A and B (with load) for electric and electronic products
(GB/T 2424.7-2006, IEC 60068-3-7..2001, IDT)
IEC 60721 (all parts) Classification of environmental conditions
3 Terms and definitions
The following terms and definitions established by GB/T 2422 apply to this section.
GB/T 2423.2-2008/IEC 60068-2-2.2007
3.1
Refers to the adjusted airflow rate of the workspace, which maintains the set conditions, but is also low enough that the temperature at any point on the test sample will not
Reduced by more than 5K due to air circulation (if possible, no more than 0.5m/s).
3.2
Refers to the adjusted airflow velocity of the workspace, in order to maintain the set conditions, while making the temperature at any point on the test sample due to air circulation
The effect of the ring is reduced by more than 5K.
4 Comparison of test methods for non-heat-dissipation test samples and heat-dissipation test samples
4.1 General
The manufacture and confirmation of the temperature test chamber shall be carried out in accordance with the provisions of GB/T 2424.5 and GB/T 2424....
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