GB/T 2423.24-1995 Environmental testing for electric and electronic products Part 2: Test methods Test Sa: Simulated solar radiation on the ground
Basic Information
Standard ID:
GB/T 2423.24-1995
Standard Name: Environmental testing for electric and electronic products Part 2: Test methods Test Sa: Simulated solar radiation on the ground
Chinese Name:
电工电子产品环境试验 第2部分:试验方法 试验Sa:模拟地面上的太阳辐射
Standard category:National Standard (GB)
state:in force
Date of Release1995-08-29
Date of Implementation:1996-08-01
standard classification number
Standard ICS number:Test >> 19.040 Environmental Test
Standard Classification Number:Electrical Engineering>>General Electrical Engineering>>K04 Basic Standards and General Methods
associated standards
alternative situation:GB 2423.24-1981
Procurement status:IDT IEC 68-2-5:1975
Publication information
publishing house:China Standards Press
ISBN:155066.1-12410
Publication date:2004-04-02
other information
Release date:1981-08-10
Review date:2004-10-14
Drafting unit:The Fourth Working Group of the Environmental Standards Committee
Focal point unit:National Technical Committee for Standardization of Environmental Conditions and Environmental Testing for Electrical and Electronic Products
Publishing department:State Bureau of Technical Supervision
competent authority:China Electrical Equipment Industry Association
Introduction to standards:
Please refer to this standard for details. GB/T 2423.24-1995 Environmental testing for electric and electronic products Part 2: Test methods Test Sa: Simulated solar radiation on the ground GB/T2423.24-1995 Standard download decompression password: www.bzxz.net
Some standard content:
GB/T2423.24--1995
This standard is equivalent to the 1975 edition of the International Electrotechnical Commission standard IEC68-2-5 "Basic Environmental Test Procedures Part 2: Test Method Test Sa: Simulated Solar Radiation on the Ground". By making our standards equivalent to international standards, we can adapt to the development of international trade and the needs of economic and technological exchanges as soon as possible. This standard replaces GB2423.24--81 "Basic Environmental Test Procedures for Electrical and Electronic Products Test Sa: Test Method for Simulated Solar Radiation on the Ground".
This standard was first issued in 1981 and revised for the first time in August 1995. From the date of implementation of this standard, the original national standard of the People's Republic of China GB2423.24-81 will be abolished at the same time. This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Environmental Conditions and Environmental Testing for Electrical and Electronic Products. The main drafting unit of this standard: the Fifth Research Institute of the Ministry of Electronics Industry. The main drafters of this standard are: Fu Wenru, Huang Wenzhong, Zhou Xincai, Xie Jianhua, Huang Yuzhou. 266
GB/T2423.24—1995
1. Formal resolutions or agreements on technical issues formulated by the technical committees of the International Electrotechnical Commission with the participation of all national committees that are particularly concerned about the issue, which reflect and express the international consensus on the issue as much as possible. 2. These resolutions or agreements are accepted by the national committees in the form of recommended standards for international use. 3. In order to promote international unification, the International Electrotechnical Commission hopes that all member countries will adopt the contents of the International Electrotechnical Commission recommended standards as their national standards when formulating national standards, as long as the specific conditions of the country permit. Any differences between the International Electrotechnical Commission's recommended standards and national standards should be clearly pointed out in the national standards as much as possible. This standard was formulated by the International Electrotechnical Commission Technical Committee 50 (Environmental Testing). The first draft was discussed at the Leningrad Conference in 1971, and a new draft was formed as a result of the conference. Document 50 (Central Office) No. 170 was sent to the National Committees in July 1973 and voted on according to the "six-month rule". The following National Committees voted explicitly in favor of this standard: Australia
Belgium
Canada
Czechoslovakia
Federal Republic of Germany
Hungary
Israel
Italy
Portugal
Romania
Spain
Turkey
History of "Test Sa: Simulation of solar radiation on the ground": First edition (1975)
In the past, there was no version of "Solar radiation test" in IEC Standard No. 68. Related specifications:
IEC68-1: General principles and guidelines.
IEC68-2-9: Guidelines for solar radiation tests. 267
National Standard of the People's Republic of China
Environmental testing for electric and electronic products
Part 2: Test methods
Test Sa: Simulated solar radiation at ground level1995
GB/T2423.24
idt IEC 68-2-5:1975
Replaces GB2423.24-81
Solar radiation test is a test that will directly endanger the health of test personnel. Therefore, before the test, you must carefully read the contents of Chapter 9 of GB/T2424.14-1995 "Environmental testing for electric and electronic products Part 2: Test methods Guidelines for solar radiation test". 1 Purpose
To determine the effects of ground solar radiation on equipment and components (thermal, mechanical, chemical, electrical, etc.). 2 Initial test
In accordance with the provisions of the relevant specifications, the test samples shall be visually inspected, and the electrical and mechanical properties shall be tested. 3 Test equipment
The radiation intensity of the light source of the test box for the test shall be 1.120kW/m±10% on the specified irradiation measurement plane. This value includes the radiation absorbed by the test sample after being reflected by the test box, but does not include the long-wave infrared emitted by the test box. The measurement of radiation intensity is specified in Article 6.1 of GB/T2424.14-1995. The spectral energy distribution and tolerance are shown in Table 1. Note: If only the thermal effect of solar radiation is considered, see 2.2 and 2.3 of GB/T2424.14--1995. Table 1 Spectral energy distribution and tolerance
Radiation intensity
Ultraviolet B
0.28~0.32
Ultraviolet A
0.32~0.40
0.40~0.52
*Radiation shorter than 0.3μm reaching the earth's surface is unimportant visible light
0.52~~0.64
3.2 The test chamber should be equipped with a device to maintain the specified temperature, air flow velocity and humidity conditions. Note: Air flow velocity will greatly reduce the temperature rise of the sample, see 1.5 in GB/T2424.14--1995. Approved by the State Bureau of Technical Supervision on August 29, 1995. 268
0.64~0.78
Infrared
0.78~3.00
Implementation on August 1, 1996
GB/T2423.24--1995
3.3 The temperature measuring device in the test chamber should avoid the radiant heat of the light source. The temperature measurement is carried out on a horizontal plane of 0 to 50 mm below the specified irradiation plane. One or more points at the center between the test sample and the chamber wall or at a distance of 1 m from the test sample (whichever is shorter) are used as temperature measurement points.
4 Conditional test
4.1 The test sample shall be placed on a sample holder or pad with a certain thermal conductivity and heat capacity, and shall be separated from other samples to avoid the radiation source or secondary radiation heat, see 4.6 of GB/T2424.14-1995. 4.2 During the entire test period, the irradiance, temperature, humidity and other environmental conditions in the box shall be maintained at the level corresponding to the test procedure in accordance with the requirements of the relevant specifications.
4.3 According to the test duration specified in the relevant specifications, the test sample shall be exposed to one of the following three test methods (see Figure 1). Test procedure A
Take 24h as a cycle, irradiate for 8h, stop irradiating for 16h, and repeat the test as required (the total radiation amount of each cycle is 8.96kW·h/m2, which is equivalent to the most severe natural conditions). Test procedure B
Take 24h as one cycle, irradiate for 20h, stop irradiation for 4h, repeat the test as required (the total radiation of each cycle is 22.4kW.h/m2).
Test procedure C
Continuous irradiation as required.
Note: For details, see 3.1 and 3.2 of GB/T2424.14--1995. 4.4 During the irradiation period, the temperature in the test chamber shall be increased to and maintained at one of the following values at a rate close to linear. a) +40℃;
b) +55℃.
In test procedure A, the temperature in the test chamber shall be increased 2h before the start of each irradiation stage. During the stop stage of test procedures A and B, the temperature in the test chamber shall be reduced to +25°℃ at a rate close to linear and the temperature shall be kept stable. The relationship between temperature, irradiation and time is shown in Figure 1. During the entire test process, the temperature in the chamber shall be maintained within ±2℃ of the value specified in the procedure.
4.5 If the above test is combined with controlled humidity conditions, the relevant specification should indicate at which of the following stages the specified humidity needs to be maintained: a) only during the irradiation stage;
b) only during the off-irradiation stage;
c) during the entire test duration.
4.6 The test duration required by the relevant specification should be selected from the following values - a) 3 cycles, i.e. 3d;
b) 10 cycles, i.e. 10d;
c) 56 cycles, i.e. 56d.
Note: The duration depends on the purpose of the test, see 3.3 of G13/T2424.14*-1995. 4.7 The relevant specification should specify whether the sample under test is to be operated during the test. If the relevant specification requires the measurement of the surface or internal temperature reached by the test sample under the specified test conditions, all the necessary information for the overflow measurement should be given. 4.8 If recovery treatment is used, the relevant specification should specify the sample pretreatment and recovery conditions. 269
5Final test
Duration
GB/T2423.24--1995
cycles
Irradiation duration (8h)Www.bzxZ.net
Test procedure A
Irradiation duration (20h)
·cycles
Duration
Test procedure B
Duration
Continuous irradiation (as required)
Test procedure C
Figure 1 Temperature-irradiation-time relationship diagram
The test samples should be inspected for appearance, electrical properties and mechanical properties in accordance with the requirements of relevant specifications. 6 Contents to be given in the relevant specifications
When the relevant specifications include this test, the following contents shall be given: a) pre-treatment procedures, (4.8);
b) electrical and mechanical properties tests to be carried out before the test, (Chapter 2); c) description of the support or bracket on which the test sample is placed, the state of the test sample, the relative position of the irradiation measurement plane and the direction of the incident radiation (if it is not vertically downward), (4.1); d) the purpose of the test and the test procedure selected accordingly (A, B or C), (4.2 and 4. 3); e) the required temperature in the chamber during the irradiation phase (+40°C or +55°C), (4.4); f) the maximum airflow velocity allowed in the chamber, (3.2); g) relevant humidity conditions, if required, (4.5); h) test duration, (4.6);
i) required operating performance tests and temperature tests during conditional tests, (4.7); j) recovery conditions, (4.8);
k) electrical and mechanical properties tests after the test, (Chapter 5); 1) any other relevant details.
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