GB/T 2424.7-2024 English PDF (GB/T2424.7-2024)

GB/T 2424.7-2024: Environmental testing - Part 3: Supporting documentation and guidance - Measurements in temperature chambers for tests A (Cold) and B (Dry heat) (with load)
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GB/T 2424.7-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.040
CCS K 04
GB/T 2424.7-2024 / IEC 60068-3-7.2020
Replacing GB/T 2424.7-2006
Environmental Testing - Part 3.Supporting Documentation
and Guidance - Measurements in Temperature Chambers
for Tests A (Cold) and B (Dry heat) (with load)
[IEC 60068-3-7.2020, Environmental Testing - Part 3-7.Supporting Documentation
and Guidance - Measurements in Temperature Chambers for Tests A (Cold) and B
(Dry heat) (with load), IDT]
ISSUED ON. AUGUST 23, 2024
IMPLEMENTED ON. MARCH 1, 2025
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 6
4 Measurement System... 8
4.1 Overview... 8
4.2 Temperature... 8
4.3 Humidity... 9
4.4 Inner Wall Emissivity... 9
4.5 Airflow Velocity... 9
4.6 Recording Device... 9
5 Determination of Temperature Performance... 10
5.1 Environment of Measurement Site... 10
5.2 Test Chamber Load... 10
5.3 Placement of Temperature Sensor... 10
6 Test Procedures... 11
6.1 Confirmation Method... 11
6.2 Routine Monitoring Method... 11
7 Evaluation Criteria... 11
8 Information Provided in Performance Report... 12
Appendix NA (informative) Constituent Parts of GB/T 2424... 13
Bibliography... 14
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This document is Part 7 of GB/T 2424.The parts of GB/T 2424 that have been issued are shown
in Appendix NA.
This document serves as a replacement for GB/T 2424.7-2006 Environmental Tests for Electric
and Electronic Products - Measurements in Temperature Chambers for Tests A and Tests B
(with load). In comparison with GB/T 2424.7-2006, apart from structural adjustments and
editorial modifications, the main technical changes are as follows.
a) The content of “Table 1 -- Test Conditions” is modified (see 3.1; 3.1 of Version 2006);
b) The requirements for “temperature sensor” are modified (see 4.2.2; 4.1.1 of Version
2006);
c) The content of “location of test load” is modified (see 5.2.2, 5.2.1 of Version 2006);
d) “Location of the chamber wall sensor” is deleted (see 5.3.2 and Figure 2 of Version
2006).
This document identically adopts IEC 60068-3-7.2020 Environmental Testing - Part 3-7.
Supporting Documentation and Guidance - Measurements in Temperature Chambers for Tests
A (Cold) and B (Dry heat) (with load).
This document makes the following minimal editorial modifications.
---To coordinate with the existing standards, the title of the Standard is modified into
Environmental Testing - Part 3.Supporting Documentation and guidance -
Measurements in Temperature Chambers for Tests A (Cold) and B (Dry heat) (with
load);
---Appendix NA (informative) “Constituent Parts of GB/T 2424” is added.
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by and shall be under the jurisdiction of National Technical
Committee 8 on Environmental Conditions and Environmental Testing for Electrical and
Electronic Products of Standardization Administration of China (SAC/TC 8).
The drafting organizations of this document. China National Electric Apparatus Research
Institute Co., Ltd.; AVIC Changcheng Metrology and Measurement (Tianjin) Co., Ltd.; National
Institute of Measurement and Testing Technology; Chongqing Hongrui Testing Instrument Co.,
Ltd.; Jiangsu TOMILO Advanced Equipment Co., Ltd.; State Grid Jiangxi Electric Power
Environmental Testing - Part 3.Supporting Documentation
and Guidance - Measurements in Temperature Chambers
for Tests A (Cold) and B (Dry heat) (with load)
1 Scope
This document provides a uniform and reproducible method for confirming whether the
temperature test chambers comply with the requirements specified by the test methods in IEC
60068-2-1 and IEC 60068-2-2 when there are radiating or non-radiating test samples and under
the condition where there is air circulation in the working space. This document is mainly
applicable to users when conducting routine test chamber performance monitoring.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 2424.5-2021 Enviromental Testing - Part 3.Supporting Documentation and Guidance -
Confirmation of the Performance of Temperature Chambers (IEC 60068-3-5.2018, IDT)
3 Terms and Definitions
The following terms and definitions are applicable to this document.
The terminology databases used for standardization maintained by ISO and IEC can be found
below.
3.1 test specification
Test procedures for test chambers with or without forced air circulation. It is applicable to test
chambers of all sizes.
NOTE. Table 1 summarizes the test conditions of IEC 60068-2-1 and IEC 60068-2-2; the
temperature surge test conditions have been deleted in earlier versions of these documents.
GB/T 2424.7-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.040
CCS K 04
GB/T 2424.7-2024 / IEC 60068-3-7.2020
Replacing GB/T 2424.7-2006
Environmental Testing - Part 3.Supporting Documentation
and Guidance - Measurements in Temperature Chambers
for Tests A (Cold) and B (Dry heat) (with load)
[IEC 60068-3-7.2020, Environmental Testing - Part 3-7.Supporting Documentation
and Guidance - Measurements in Temperature Chambers for Tests A (Cold) and B
(Dry heat) (with load), IDT]
ISSUED ON. AUGUST 23, 2024
IMPLEMENTED ON. MARCH 1, 2025
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 6
4 Measurement System... 8
4.1 Overview... 8
4.2 Temperature... 8
4.3 Humidity... 9
4.4 Inner Wall Emissivity... 9
4.5 Airflow Velocity... 9
4.6 Recording Device... 9
5 Determination of Temperature Performance... 10
5.1 Environment of Measurement Site... 10
5.2 Test Chamber Load... 10
5.3 Placement of Temperature Sensor... 10
6 Test Procedures... 11
6.1 Confirmation Method... 11
6.2 Routine Monitoring Method... 11
7 Evaluation Criteria... 11
8 Information Provided in Performance Report... 12
Appendix NA (informative) Constituent Parts of GB/T 2424... 13
Bibliography... 14
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This document is Part 7 of GB/T 2424.The parts of GB/T 2424 that have been issued are shown
in Appendix NA.
This document serves as a replacement for GB/T 2424.7-2006 Environmental Tests for Electric
and Electronic Products - Measurements in Temperature Chambers for Tests A and Tests B
(with load). In comparison with GB/T 2424.7-2006, apart from structural adjustments and
editorial modifications, the main technical changes are as follows.
a) The content of “Table 1 -- Test Conditions” is modified (see 3.1; 3.1 of Version 2006);
b) The requirements for “temperature sensor” are modified (see 4.2.2; 4.1.1 of Version
2006);
c) The content of “location of test load” is modified (see 5.2.2, 5.2.1 of Version 2006);
d) “Location of the chamber wall sensor” is deleted (see 5.3.2 and Figure 2 of Version
2006).
This document identically adopts IEC 60068-3-7.2020 Environmental Testing - Part 3-7.
Supporting Documentation and Guidance - Measurements in Temperature Chambers for Tests
A (Cold) and B (Dry heat) (with load).
This document makes the following minimal editorial modifications.
---To coordinate with the existing standards, the title of the Standard is modified into
Environmental Testing - Part 3.Supporting Documentation and guidance -
Measurements in Temperature Chambers for Tests A (Cold) and B (Dry heat) (with
load);
---Appendix NA (informative) “Constituent Parts of GB/T 2424” is added.
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by and shall be under the jurisdiction of National Technical
Committee 8 on Environmental Conditions and Environmental Testing for Electrical and
Electronic Products of Standardization Administration of China (SAC/TC 8).
The drafting organizations of this document. China National Electric Apparatus Research
Institute Co., Ltd.; AVIC Changcheng Metrology and Measurement (Tianjin) Co., Ltd.; National
Institute of Measurement and Testing Technology; Chongqing Hongrui Testing Instrument Co.,
Ltd.; Jiangsu TOMILO Advanced Equipment Co., Ltd.; State Grid Jiangxi Electric Power
Environmental Testing - Part 3.Supporting Documentation
and Guidance - Measurements in Temperature Chambers
for Tests A (Cold) and B (Dry heat) (with load)
1 Scope
This document provides a uniform and reproducible method for confirming whether the
temperature test chambers comply with the requirements specified by the test methods in IEC
60068-2-1 and IEC 60068-2-2 when there are radiating or non-radiating test samples and under
the condition where there is air circulation in the working space. This document is mainly
applicable to users when conducting routine test chamber performance monitoring.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 2424.5-2021 Enviromental Testing - Part 3.Supporting Documentation and Guidance -
Confirmation of the Performance of Temperature Chambers (IEC 60068-3-5.2018, IDT)
3 Terms and Definitions
The following terms and definitions are applicable to this document.
The terminology databases used for standardization maintained by ISO and IEC can be found
below.
3.1 test specification
Test procedures for test chambers with or without forced air circulation. It is applicable to test
chambers of all sizes.
NOTE. Table 1 summarizes the test conditions of IEC 60068-2-1 and IEC 60068-2-2; the
temperature surge test conditions have been deleted in earlier versions of these documents.