GB/T 2423.22-2012 English PDF (GBT2423.22-2012)

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GB/T 2423.22-2012: Environmental testing - Part 2: Test methods - Test N: Change of temperature
GB/T 2423.22-2012
Environmental testing.Part 2. Test methods.Test N. Change of temperature
ICS 19.040
K04
National Standards of People's Republic of China
Replace GB/T 2423.22-2002, GB/T 2424.13-2002
Environmental testing - Part 2. Test methods
Test N. temperature change
Environmentaltesting-Part 2. Testmethods-
TestN. Changeoftemperature
(IEC 60068-2-14.2009, Environmentaltesting-
Part 2-14. Tests-TestN. Changeoftemperature, IDT)
Released on.2012-12-31
2013-06-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Content
Foreword I
Introduction III
1 range 1
2 Normative references 1
3 Field conditions of temperature change 1
4 General 1
4.1 Design of temperature change test 1
4.2 Test parameters 2
4.3 Purpose of the test and test method selection 2
4.4 Choice of exposure duration 2
4.5 Conversion time selection 2
4.6 Application Limits for Temperature Change Tests 3
5 Test Type Selection Guide 3
6 initial detection and final detection 3
6.1 Initial detection 4
6.2 Final detection 4
7 Test Na. Specify a rapid temperature change for the transition time 4
7.1 Test Overview 4
7.2 Test procedure 4
7.3 Recovery 5
7.4 Information to be given in the relevant specifications 5
8 Test Nb. temperature change specifying the rate of change 6
8.1 Test Overview 6
8.2 Test procedure 6
8.3 Recovery 7
8.4 Information to be given in the relevant specifications 7
9 Test Nc. two liquid tank method rapid temperature change 8
9.1 Test Overview 8
9.2 Test procedure 8
9.3 Recovery 9
9.4 Information to be given in the relevant specification 9
10 Information to be given in the test report 9
Appendix NA (informative) Part of the GB/T 2423 standard 11
Foreword
This part is the 22nd part of the GB/T 2423 standard. The components of the GB/T 2423 standard are listed in the informative appendix NA.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 2423.22-2002 "Electrical and Electronic Products Environmental Test Part 2. Test Method Test N. Temperature
"Changes" and GB/T 2424.13-2002 "Electrical and Electronic Products Environmental Testing Part 2. Test Methods Temperature Change Test Guide".
This part is mainly based on GB/T 2423.22-2002, which integrates part of GB/T 2424.13-2002 with GB/T 2423.22-
In.2002, compared with GB/T 2424.13-2002, the main technical changes and editorial changes are as follows.
--- Test Na and test Nb, remove the relevant requirements for absolute humidity, tank wall temperature and air flow rate of the test chamber (see
7.2.1, 8.2.1);
--- Test Na, the provisions of the test chamber allowed to use a rapid temperature change rate are increased (see 7.2.1);
--- Test the severity of the Na and test Nb, increasing the "exposure duration" parameter (see 7.2.3, 8.2.3);
--- Test Na, deleted the "conversion time should be. (2 ~ 3) min, (20 ~ 30) s, < 10s" provisions, replaced by "conversion time
T2 should not exceed 3 minutes" (see 7.2.5);
--- Test Nb, increased two preferred values of temperature change rate. (10 ± 2) K/min and (15 ± 3) K/min (see 8.2.3);
--- Test Nc, deleted two sets of standardized duration parameters;
--- The unit of temperature deviation replaces "°C" with "K";
--- Deleted the contents of 3.4.2 and Chapter 4 of GB/T 2424.13-2002;
--- Updated the contents of 3.3 of GB/T 2424.13-2002;
--- Updated all the diagrams;
--- Combine the contents of the test Na, the test Nb, and the test Nc "initial and final test" into a separate chapter 6;
--- Added Chapter 10 "Information to be given in the test report";
--- The structure of each chapter describing the test Na, test Nb, test Nc has been adjusted (see Chapter 7, Chapter 8, Chapter 9).
This section uses the translation method equivalent to IEC 60068-2-14.2009 "Environmental Testing Part 2-14. Test Method Test N.
temperature change".
The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows.
GB/T 2423.1 Environmental testing of electrical and electronic products - Part 2. Test methods Test A. Low temperature (GB/T 2423.1-
2008, IEC 60068-2-1..2007, IDT)
GB/T 2423.2 Environmental testing of electrical and electronic products - Part 2. Test methods Test B. High temperature (GB/T 2423.2-
2008, IEC 60068-2-2.2007, IDT)
Compared with IEC 60068-2-14.2009, this part mainly made the following editorial changes.
--- The name of this section was changed to "Environmental Test Part 2. Test Method Test N. Temperature Change";
--- In Chapter 9, the original IEC number is incorrect. In this part, the number of the item 9.3 is changed to "9.2.4", and the number of the item 9.4 is changed to "9.3".
The number of 9.5 is changed to "9.4";
--- In Figure 2, the expression in the original IEC is incorrect. This section will be two places. \u003ct1/10”改为“≤t1/10”;
--- Added the informative appendix "components of the GB/T 2423 standard" (see Appendix NA).
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 section drafted by. China Electric Apparatus Research Institute Co., Ltd., Shenzhen Institute of Metrology and Quality Inspection, Zhejiang Institute of Metrology
Research Institute, Chongqing Sida Test Equipment Co., Ltd., Beijing University of Aeronautics and Astronautics, Shanghai Industrial Automation Instrumentation Research Institute, Shanghai Quality Supervision
Institute of Technology.
The main drafters of this section. Zhang Zhiyong, Zhu Jianhua, Zhang Hongyu, Chen Yunsheng, Yao Jun, Hu Honghui, Lu Zhaoming.
The previous versions of the standards replaced by this section are.
---GB/T 2423.22-1981, GB/T 2423.22-1987, GB/T 2423.22-2002;
---GB/T 2424.13-1981, GB/T 2424.13-2002.
introduction
The temperature change test is used to determine the effect of one or several consecutive temperature changes on the test sample.
The temperature change test is not used to determine the effect only due to high or low temperatures. To determine such effects, high or low temperatures should be used.
test.
The effect of the temperature change test depends on.
--- The high temperature value and low temperature value of the condition test, the temperature changes between these two values;
--- The duration of the test sample at high or low temperatures;
--- The rate of change of temperature from high to low or from low to high;
---The number of cycles of the condition test;
--- Heat transferred to the test sample or heat transferred from the test sample.
The detailed specifications contain suitable test parameters, and the selection guidelines for these parameters are given in this part of GB/T 2423.
Environmental testing - Part 2. Test methods
Test N. temperature change
1 Scope
The tests specified in this part of GB/T 2423 are used to determine the ability of components, equipment or other products to withstand rapid changes in ambient temperature.
force. The duration of exposure at each temperature required to achieve this depends on the characteristics of the test sample.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (includi...