GB/T 2423.45-1997 Environmental testing for electric and electronic products Part 2: Test methods Test Z/ABDM: Climate sequence
Some standard content:
GB/T2423.45—1997
This standard is equivalent to the International Electrotechnical Commission standard IEC68-2-61 (1st edition in June 1991) "Environmental testing Part 2: Test methods Test Z/ABDM: Climate sequence". This standard is formulated to meet the requirements and needs of the International Electrotechnical Commission Electronic Component Quality Review System (IECQ). In order to adapt to international trade, technology and economic exchanges as soon as possible, accelerate the integration with international practices, and improve the international competitiveness of my country's electrical and electronic products, it is extremely important to adopt international standards. The national standards closely related to the environmental testing of electrical and electronic products are: GB2421 General rules for basic environmental testing procedures for electrical and electronic products GB/T2422 Terminology for environmental testing of electrical and electronic products GB/T2423 Series standards for environmental testing methods for electrical and electronic products GB/T2424 Series standards for environmental testing guidelines for electrical and electronic products This standard is one of the GB/T2423 series standards for environmental testing methods for electrical and electronic products. The national standards mentioned in this standard that correspond to international standards such as IEC68-1, IEC68-2-1, IEC68-2-2, IEC68-2-30 and IEC68-2-13 are: GB2421-89 General rules for basic environmental regulations for electric and electronic products (equivalent to IEC68-1:1985) GB/T2423.1-89 Basic environmental test regulations for electric and electronic products Test A: Low temperature test method (equivalent to IEC68-2-1)
GB/T 2423.2-89
Basic environmental test procedures for electric and electronic products Test B: High temperature test method (equivalent to IEC68-2-2)
GB/T2423.4-93Basic environmental test procedures for electric and electronic products Test Db: Alternating damp heat test method (equivalent to IEC68-2-30)
GB/T2423.21-91Basic environmental test procedures for electric and electronic products Test M: Low pressure test method (equivalent to IEC68-2-13)
Appendix A and Appendix B of this standard are both informative appendices. This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for the Promotion of Environmental Conditions and Environmental Test Standards for Electric and Electronic Products. This standard was drafted by the Guangzhou Electric Science Research Institute of the Ministry of Machinery Industry. The main drafter of this standard: Xie Jianhua.
GB/T2423.45-1997
IEC Foreword
1) IEC formal decisions or agreements on technical matters are made by technical committees in which all national committees with a special interest in the issue are represented, and they express the international consensus on the issues discussed as accurately as possible. 2) These decisions or agreements are made for international use in the form of recommendations and are accepted by the national committees in this sense. 3) In order to promote international unification, IEC hopes that all national committees will adopt the texts of IEC recommended standards as national standards to the extent permitted by national conditions. Any inconsistencies between IEC standards and corresponding national standards should be clearly pointed out in the national standards as far as possible. This international standard IEC68-2-61. was prepared by IEC Technical Committee 50 (Environmental Testing). The text of this standard is based on the following documents: Six-month method
50(C0)204
Voting report
50(CO)
Full voting information on the approval of this standard can be found in the voting report in the table above. Appendix A and Appendix B are for reference only.
GB/T2423.45---1997
The significance of the climatic test sequence, especially the climatic test sequence of components, has been indicated in IEC68-1 by the content of "climatic sequence" (see Chapter 7 and the guidelines in Appendix B).
Due to the increasing importance of the IEC electronic component quality review system (IECQ), it is necessary to formulate a more precise test sequence than the provisions of IEC68-1 Chapter 7 to ensure good test reproducibility. This standard is based on Chapter 7 of IEC68-1 and specifies in detail the climatic sequence combination test method for product test samples, mainly components. This standard also contains two guidelines (suggestive appendices) for specification writers and testers. Note: Test Z/ABDM is a "combination test" defined in IEC68-1, not a "sequence of questions" defined in IEC68-1. Since the use of the term "sequence" in Chapter 7 of IEC68-1 has been fully recognized, it has been decided to continue to use the term "instantaneous sequence" in the various operations involved in this combination test. 32
1 Purpose
National Standard of the People's Republic of China
Environmental testing for electric and electronic products
Part 2: Test methods
Test Z/ABDM:Climatic sequenceGB/T 2423.45--1997
idt IEC 68-2-61: 1991
Provides a standard combined test method to determine the environmental adaptability of test samples when subjected to environmental conditions consisting of environmental stresses such as temperature, humidity and low pressure (when necessary). The order of applying stresses and the environmental conditions when switching between test steps have been selected to accelerate and intensify the same degradation mechanisms as natural climatic conditions.
Note: The classification and grading of natural environmental conditions can be found in IEC721-2 and IEC721-3. When the degradation mechanisms are the same and the specified test requirements are met, this standard can also be used as the basis for writing similar test methods. In this test, the test samples are subjected to environmental tests in a standard sequence and in accordance with the requirements specified in Appendix A of IEC68-1. Code classification, only the third group of numbers is used to indicate the number of cycles of step 5: cyclic damp heat test Db (see Chapter 6 of IEC68-2-30). In this standard, the short dashes in climate types such as -/-/56, 40/-/- can be replaced by any standard value suitable for this position in the combination of 55/100/56, 25/085/56, 40/085/21, etc. If changes are required, the relevant specifications should provide the necessary information for each step of the selected test method (see Chapter 8). This test is often arranged to be carried out after other tests involving mechanical stress, such as terminal strength test, solderability test and vibration test, as a method to determine whether the sealing of the test sample is damaged. 2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. All members of IEC and ISO maintain catalogues of currently valid international standards. IEC68-1:1988 Environmental testing Part 1: General IEC68-2-1:1990 Environmental testing Part 2: Tests - Test A: Low temperature IEC68-2-2:1974 Environmental testing Part 2: Tests Test B: High temperature IEC68-2-2A:1976 First Supplement||tt ||IEC68-2-13:1983 Environmental testing Part 2: Test 1 Test M: Low pressure IEC68-2-28:1980 Environmental testing Part 2: Test 1 Damp heat test guide IEC68-2-30:1980 Environmental testing Part 2: Test-Test Db and guide: Cyclic damp heat (12h+12h cycle) IEC68-3-1:1974 Environmental testing Part 3: Background material, Section -1 Low temperature and high temperature test IEC68-3-1A:1978 First supplement
Approved by the State Administration of Technical Supervision on July 3, 1997 and implemented on May 1, 1998
GB/T2423.45—1997
IEC721-2 Classification and grading of environmental conditions Part 2: Natural environmental conditionsIEC721-3 Classification and grading of environmental conditions Part 3: Classification of environmental parameter groups and their severity 3 Definitions
The definitions of the terms used are generally found in GB/T2422. 4 Test equipment
The test equipment is the equipment required for each individual test (including test methods and test modes) and has the severity level required by the sequence
Special attention should be paid when using a special test chamber that can gradually establish the test conditions specified in the different test steps in the sequence (see B3 of Appendix B).
In general, it can be considered that the use of a special test chamber that automatically switches the test sample between different working spaces is the same as the use of a separate test chamber. However, the test chamber with an automatic switching device must ensure that the recovery conditions at the end of each test step (especially at the end of test step 2 of method 1) are met (see 8.2.2). 5 Severity level
The severity level is mainly determined by the high overflow test temperature (4.1 of IEC68-2-2), the low temperature test temperature (4.1 of IEC68-2-1), the air pressure and the test duration. If the low pressure test (Chapter 4 of IEC68-2-13) is required, the last item of the severity level is the number of damp heat test cycles in 8.2.5 of this standard.
6 Pretreatment
Unless otherwise specified in the relevant specifications, pretreatment is generally required. The pretreatment should last at least 1 hour under the standard atmospheric conditions for the test. 7 Initial inspection
The test samples shall be subject to visual inspection, dimensional inspection and functional inspection as specified in the relevant specifications. 8 Test
8.1 Overview
There are three standardized test methods. Among them, method 1 is the best and should be used unless otherwise specified in the relevant specifications. In method 1, the test sample is first exposed to high temperature, then exposed to damp heat conditions for one cycle, and then immediately subjected to a low temperature test to allow moisture to enter the sample or cracks on the sample's sealing surface, causing further damage to the sample. Then, after the low pressure test (optional), it is exposed to alternating mixed heat conditions (except for climate types -/-/04 and -/-/10) to complete the inspection of the test sample's seal. Method 2 is a more severe test, which inserts a low temperature test between each of the last five damp heat cycles (only applicable to climate type -/-/56).
Method 3 provides a shorter climate sequence for batch acceptance testing, which can be used to accept electronic components of reviewed quality when specified in the relevant specifications.
When a recovery phase is specified, it should be carried out under standard atmospheric conditions for testing, unless otherwise specified in the relevant specifications. 8.2 Method 1
This method contains five test steps, one of which (step 4 of 8.2.4) is optional. 8.2.1 Step 1: High temperature
a) Expose the test specimen to the conditions of high temperature test Ba in Chapter 7 of IEC68-2-2 for a duration of 16h + 0.5h. The test temperature is specified in the relevant specification, preferably the temperature specified in the climate type. The relevant specification may specify that an intermediate test be carried out at the end of the high temperature test in Chapter 8 of IEC:68-2-2, and the time spent does not count the duration of human exposure.
GB/T2423.45.-1997
b) Remove the test specimen from the test chamber and allow a recovery time of at least 1h to end step 1. The total duration of step 1 is 24h ± 0.5h. c) The time interval before step 2 is not allowed to be longer than 72h (3d), during which the conditions are the recovery conditions, i.e. the standard atmospheric conditions for the test.
8.2.2 Step 2: Damp heat
a) Expose the test specimen to cyclic damp heat conditions for one cycle as specified in Chapter 6 of IEC68-2-30. If there are no special provisions in the relevant specifications, the alternating mode 1 should generally be used. Unless otherwise specified in the relevant specifications, the high temperature should be 55C. b) Then, recovery should be carried out in accordance with Chapter 8 of IEC68-2-30. c) After recovery, the test sample should be immediately subjected to the test of step 3. 8.2.3 Step 3 Low temperature
a) According to the provisions of Chapter 7 of IEC68-2~1, the test sample is exposed to the conditions of test Aa. The test temperature is specified by the relevant specifications, preferably the temperature specified for the climate type. The test duration is 120min±5min. The relevant specifications may stipulate that an intermediate test is carried out at the end of the low temperature test in Chapter 8 of IEC68-2-1, and the time spent is not included in the human exposure duration.
b) Then, the test sample should be removed from the test chamber and recovered in accordance with the requirements of Chapter 9 of IEC68-2-1. c) The time interval before step 5 is not allowed to be longer than 72h, and the conditions during this period are recovery conditions. However, when the relevant specifications choose step 4, it should be implemented during this interval. 8.2.4 Step 4 (optional): Low pressure a) When the relevant specifications specify a low pressure test, the test samples of climate types 40/-/~, 55/-/- and 65/-/- shall be exposed to conditions that comply with IEC68-2-13 Test M, and the severity level shall be the severity level specified in the relevant specifications. The test shall be carried out at a temperature of 15C to 35C, and the test duration shall be 60min ± 5min, unless otherwise specified in the relevant specifications. When the relevant specifications specify an electrical strength test, it shall be carried out in the last 5min of exposure according to the specified test voltage and procedure. b) The recovery phase shall be between 1h and 2h.
8.2.5 Step 5: Damp heat
a) The test conditions are the same as in 8.2.2a). The number of test cycles shall be determined according to the following climate types unless otherwise specified in the relevant specifications: Climate types: -/-/40 and -/-/10 are not applicable -/-/21
-7-/56
1 cycle
5 cycles
b) When specified in the relevant specifications, the samples tested in accordance with 8.2.5a) shall be removed from the test chamber immediately after the specified number of cycles, and the water droplets shall be shaken off. Then, within 15 minutes after the samples leave the test chamber, they shall be subjected to visual inspection, dimensional inspection and functional inspection as specified in the relevant specifications.
c) After a recovery period of 1.5h to 2h, the test samples shall be subjected to visual inspection, dimensional inspection and functional inspection as specified in the relevant specifications. d) When the relevant specification specifies an extended recovery period, the test sample shall be allowed to recover for another 24h ± 0.5h and then be subjected to the visual inspection, dimensional inspection and functional inspection specified in the relevant specification. 8.3 Method 2
Related Specifications When using Method 2, it should be noted that this method is only applicable to test samples of climate type -/-/56. 8.3.1 The test sample shall be tested in accordance with 8.2.1~~8.2.4 (including 8.2.1 and 8.2.4) (see Figure 2). 8.3.2 Then, the test sample shall be subjected to a cycle Db alternating damp heat test, followed by recovery in accordance with 8.2.2b). 8.3.3 After recovery, the test sample shall be immediately subjected to Aa low temperature test in accordance with 8.2.3. 8.3.4 Repeat the tests listed in 8.3.2 and 8.3.3 three more times, that is, a total of 4 test cycles, and finally perform a cycle alternating damp heat test in accordance with 8.3.2, followed by recovery. One time interval not exceeding 72h (3d) is allowed and should only be arranged between the low temperature test and the subsequent damp heat cycle. 8.3.5 Then, the test sample should be subjected to the various tests specified by the relevant specifications in 8.2.5b), 8.2.5c) and 8.2.5d). 435
8.4 Method 3
GB/T 2423.45--1997
This method can only be applied when the relevant specifications have so specified (see Figure 1). 8.4.1 Test the test sample in accordance with 8.2.1~~8.2.3 (including 8.2.1 and 8.2.3). 8.4.2 When the relevant specifications have so specified, the test sample should be subjected to the low voltage test specified in IEC68-2-13 Test M pointed out in 8.2.4 of this standard.
8.4.3 For the test samples of climate type -/-/21 and -/-/56, they shall be subjected to one cycle of damp heat test according to 8.2.2. 8.4.4 Then, the test samples shall be subjected to various tests specified in 8.2.5b), 8.2.5c) and 8.2.5d) by the relevant specifications. 9 Recovery
The recovery conditions and requirements of the three test methods in Chapter 8 are as shown in 8.1. 10 Final test
The test sample shall be subjected to visual inspection, dimensional inspection and functional inspection as specified in Chapter 8 of the relevant specification. The relevant specification shall provide the criteria for accepting or rejecting the sample.
11 Information to be given in the relevant specification
After adopting this test, the relevant specification shall give the following details according to its applicability. Pay special attention to the items marked with (*) which are the information that must be given.
Chapter, Article No.
a) When pretreatment is not required
b) Initial test (*)
c) Test method (must be given when it is not Method 1) d) Recovery
e) High temperature test temperature (*)
f) Intermediate test
many) Requirements for damp heat test, alternating mode and alternating temperatureh) Low temperature test temperature (*)
i) When low pressure test is not required
i) Severity level of low pressure test
k) When electrical strength test is required, test conditionse) Number of damp heat test cycles
m) Final test (×)
n) Extended recovery time
8.2. 1 a)
8.2. 1 a)
8.2. 3 a)
8. 2. 5 b)
8. 2.2 a)
8.2. 3 c)
8. 2. 5 d)
A1 Intermediate tests
GB/T 2423.45-1997
Annex A
(Informative Appendix)
Guidelines for specification writers
Specifiers should be aware of the consequences of specifying intermediate tests (see 8.2) at the end of Steps 1 and 3 of Method 1. The time taken for the intermediate tests must be added to the duration of exposure, which increases the practical difficulties of taking into account normal working time and the cost of the test.
The above intermediate tests do not contribute to the purpose of the test, namely the effects under a range of climatic stresses. In general, they are only substitutes for separate tests that can be carried out on additional test specimens not simultaneously with the climatic sequence. Therefore, careful consideration should be given before specifying intermediate tests.
A2 Recovery
The time for the test sample to reach equilibrium depends on its thermal inertia, that is, on the shape, mass and structure of the test sample. For the standard, the recovery time is selected as 1h, which is suitable for the smallest test sample; for other test samples, especially equipment test samples, the relevant specifications should stipulate an appropriate recovery time. Appendix B
(Informative Appendix)
Test Implementation Guide
B1 Operation Schedule
The personnel carrying out this test are particularly reminded that an accurate operation schedule needs to be prepared so that this sequence can be correctly executed and as close to normal working hours as possible. Figure 3 gives an example of method 1. The total time of each test step is not fixed, but depends on the time required for intermediate measurements at the end of step 1 and step 3 and the thawing time after the end of step 3. In addition, the excess time when the recovery time is more than 1h must be taken into account. B2 IEC 68-2-1 and 68-2-1A, 68-2-2 and 68-2-2A, 68-2-13 and 68-2-30 must be considered together with IEC 68-2-28 and 68-3-1.
B3 Use of special test chambers
Special care is required when using special test chambers, which are chambers that can continuously meet the various conditions specified in different test steps in one chamber. This type of chamber often has difficulty in meeting the required recovery conditions due to the presence of thermal inertia or condensation after the application of the previous environmental stress.
The transition between the damp heat test step and the low temperature test step is only correct if the test specimen is removed from the chamber while the conditions inside the chamber are changing. In fact, the drying that occurs during the recovery period after the damp heat test is only partial and is not equivalent to the drying that occurs during the following processes:
When the test specimens are placed in a cooled low-temperature test chamber, the water contained in the test specimens will freeze rapidly; when the test chamber with the test specimens inside is cooled, the drying occurs during the cooling process before freezing, and the water contained in the test specimens may be partially removed.
Step 1
Step 2
Step 3
Step 4
(optional)
Step 5
GB/T 2423.45 ---1997
Climate type 40//~
Climate type 55／—／—,
Climate type 65/~
Climate type —／21
Climate type／56
5 cycles (method 1)
1 cycle (method 3)
Visual, dimensional and functional inspection within 15min (when specified)—
8.2.5h)
Recovery— 8.2. 5c)
Visual, dimensional and functional testing
Extended recovery (where specified), visual, dimensional and functional testing—
Climate type +5／
Climate type 05/
Climate type 10/
Climate type 25／／/
Climate type／—/04
Climate type 10
Aa, Ba, Db and M refer to the test methods of IEC 68-2. The chapter number is the chapter number of this standard.
2*” indicates that the interval time in this stage is not allowed to be longer than 72h. Figure 1 Method 1 and Method 3
Step 1
Step 2
Step 3
Step 4
(Optional)
Step 5
GB/T 2423.45
5:1997
Initial inspection
Visual, dimensional and functional inspection within 15min (when specified) -
8.2.5b)
【Recovery—8.2.5c)
Self-visual, dimensional and functional inspection
Extended recovery (when specified), visual, dimensional and functional inspection
★At these points
Aa, Ba, Dh and M are the test methods of IEC68-2, and the chapter number is the number of this standard.
*Indicates that the interval time at this stage is not allowed to be longer than 72h. 2
Figure 2 Method 2 (Apparatus suitable for climate type -/-/56) Schedule
GB/T 2423.45-1997
Duration of operation (hours)
Manual operation
Working day
08:00-
Automatic operation
Loading samples
Temperature stabilization
Unloading samples
Loading samples
Temperature stabilization
Humidity stabilization
1st cycle
Unloading samples
Loading samples
Temperature stabilization
Unloading samples
10:24 -
Remove water drops
Install sample
Low pressure
Test: Measurement
Remove sample
12:30-
Install sample
Temperature stabilization
Humidity stabilization
2nd cycle
3rd to 6th cycle
Remove sample
１Recovery
1The first four columns in italics are specific examples.
Chapter, Article
IEC Standard
68 - 2-2
Section 1
68 -2 -30:
68 2 -1
Section 1
68 2— 13
6.368-2-30
2 In this example, the last item in the climate sequence starts on Thursday. 3 Figure 4 shows a climate sequence and a graphical representation. This standard
Test step name
Step 1
Step 2
Damp heat and humidity
Step 3
Step 4
Low pressure
(optional)
Step 5
5-cycle damp heat
Figure 3 Recommended format of the schedule for determination method 1 and its application example (see B1)+ 1
Sub-clause
Step 1
GB/T 2423.45
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545-1997
Appendix A
(Informative Appendix)
Guidelines for Specification Writers
Specifiers are cautioned about the consequences of specifying intermediate tests (see 8.2) at the end of Steps 1 and 3 of Method 1. The time taken for the intermediate tests must be added to the duration of exposure, which increases the practical difficulty of taking into account normal working time and the expense of the test.
The intermediate tests mentioned above do not contribute to the purpose of the test, namely the effects under a series of climatic stresses, and in general they are substitutes for separate tests which could be carried out on separate test specimens not simultaneously with the climatic sequence. Therefore, careful consideration should be given before specifying intermediate tests.
A2 Recovery
The time for a test specimen to reach a state of equilibrium depends on its thermal inertia, i.e. on its shape, mass and construction. For this standard, a recovery time of 1 h has been chosen, which is suitable for the smallest test specimens; for other test specimens, especially those of equipment type, a more moderate recovery time should be specified in the relevant specification. Appendix B
(Informative Appendix)
Guidelines for the Implementation of the Test
B1 Operation Schedule
The attention of the person carrying out this test is drawn up to the need to prepare an accurate operation schedule so that this sequence can be carried out correctly and in accordance with normal working hours as closely as possible. Figure 3 gives an example of method 1. The total time for the various test steps is not fixed but depends on the time required for the intermediate measurements at the end of step 1 and step 3 and the thawing time after the end of step 3. In addition, an allowance must be made for the recovery time if it is more than 1 h. B2 The guidelines IEC 68-2-1 and 68-2-1A, 68-2-2 and 68-2-2A, 68-2-13 and 68-2-30 must be considered together with IEC 68-2-28 and 68-3-1.
B3 Use of Special Test Chambers
Special test chambers are chambers that can continuously meet the various conditions specified in different test steps in one chamber. Special care should be taken when using such chambers. Such chambers often have difficulty meeting the required recovery conditions due to the presence of thermal inertia or condensed water after the application of the previous environmental stress.
The transition between the damp heat test step and the low temperature test step is correct only if the test specimens are removed from the chamber while the conditions inside the chamber are changing. In fact, the drying that occurs during the recovery period after the damp heat test is only partial and is not equivalent to the drying in the following processes:
When the test specimens are placed in a cooled low temperature test chamber, the water contained in the test specimens will freeze rapidly; when the test chamber with the test specimens inside is cooled, the drying occurs during the cooling process before freezing, and the water contained in the test specimens may be partially removed.
Step 1
Step 2
Step 3
Step 4
(optional)
Step 5
GB/T 2423.45 ---1997
Climate type 40//~
Climate type 55／—／—,
Climate type 65/~
Climate type —／21
Climate type／56
5 cycles (method 1)
1 cycle (method 3)
Visual, dimensional and functional inspection within 15min (when specified)—
8.2.5h)
Recovery— 8.2. 5c)
Visual, dimensional and functional testing
Extended recovery (where specified), visual, dimensional and functional testing—
Climate type +5／
Climate type 05/
Climate type 10/
Climate type 25／／/
Climate type／—/04
Climate type 10
Aa, Ba, Db and M refer to the test methods of IEC 68-2. The chapter number is the chapter number of this standard.
2*” indicates that the interval time in this stage is not allowed to be longer than 72h. Figure 1 Method 1 and Method 3
Step 1
Step 2
Step 3
Step 4
(Optional)
Step 5
GB/T 2423.45
5:1997
Initial inspection
Visual, dimensional and functional inspection within 15min (when specified) -
8.2.5b)
【Recovery—8.2.5c)
Self-visual, dimensional and functional inspection
Extended recovery (when specified), visual, dimensional and functional inspection
★At these points
Aa, Ba, Dh and M are the test methods of IEC68-2, and the chapter number is the number of this standard.
*Indicates that the interval time at this stage is not allowed to be longer than 72h. 2
Figure 2 Method 2 (Apparatus suitable for climate type -/-/56) Schedule
GB/T 2423.45-1997
Duration of operation (hours)
Manual operation
Working day
08:00-
Automatic operation
Loading samples
Temperature stabilization
Unloading samples
Loading samples
Temperature stabilization
Humidity stabilization
1st cycle
Unloading samples
Loading samples
Temperature stabilization
Unloading samples
10:24 -
Remove water drops
Install sample
Low pressure
Test: Measurement
Remove sample
12:30-
Install sample
Temperature stabilization
Humidity stabilization
2nd cycle
3rd to 6th cycle
Remove sample
１Recovery
1The first four columns in italics are specific examples.
Chapter, Article
IEC Standard
68 - 2-2
Section 1
68 -2 -30:
68 2 -1
Section 1
68 2— 13
6.368-2-30
2 In this example, the last item in the climate sequence starts on Thursday. 3 Figure 4 shows a climate sequence and a graphical representation. This standard
Test step name
Step 1
Step 2
Damp heat and humidity
Step 3
Step 4
Low pressure
(optional)
Step 5
5-cycle damp heat
Figure 3 Recommended format of the schedule for determination method 1 and its application example (see B1)+ 1
Sub-clause
Step 1
GB/T 2423.45
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545-1997
Appendix A
(Informative Appendix)
Guidelines for Specification Writers
Specifiers are cautioned about the consequences of specifying intermediate tests (see 8.2) at the end of Steps 1 and 3 of Method 1. The time taken for the intermediate tests must be added to the duration of exposure, which increases the practical difficulty of taking into account normal working time and the expense of the test.
The intermediate tests mentioned above do not contribute to the purpose of the test, namely the effects under a series of climatic stresses, and in general they are substitutes for separate tests which could be carried out on separate test specimens not simultaneously with the climatic sequence. Therefore, careful consideration should be given before specifying intermediate tests.
A2 Recovery
The time for a test specimen to reach a state of equilibrium depends on its thermal inertia, i.e. on its shape, mass and construction. For this standard, a recovery time of 1 h has been chosen, which is suitable for the smallest test specimens; for other test specimens, especially those of equipment type, a more moderate recovery time should be specified in the relevant specification. Appendix B
(Informative Appendix)
Guidelines for the Implementation of the Test
B1 Operation Schedule
The attention of the person carrying out this test is drawn up to the need to prepare an accurate operation schedule so that this sequence can be carried out correctly and in accordance with normal working hours as closely as possible. Figure 3 gives an example of method 1. The total time for the various test steps is not fixed but depends on the time required for the intermediate measurements at the end of step 1 and step 3 and the thawing time after the end of step 3. In addition, an allowance must be made for the recovery time if it is more than 1 h. B2 The guidelines IEC 68-2-1 and 68-2-1A, 68-2-2 and 68-2-2A, 68-2-13 and 68-2-30 must be considered together with IEC 68-2-28 and 68-3-1.
B3 Use of Special Test Chambers
Special test chambers are chambers that can continuously meet the various conditions specified in different test steps in one chamber. Special care should be taken when using such chambers. Such chambers often have difficulty meeting the required recovery conditions due to the presence of thermal inertia or condensed water after the application of the previous environmental stress.
The transition between the damp heat test step and the low temperature test step is correct only if the test specimens are removed from the chamber while the conditions inside the chamber are changing. In fact, the drying that occurs during the recovery period after the damp heat test is only partial and is not equivalent to the drying in the following processes:
When the test specimens are placed in a cooled low temperature test chamber, the water contained in the test specimens will freeze rapidly; when the test chamber with the test specimens inside is cooled, the drying occurs during the cooling process before freezing, and the water contained in the test specimens may be partially removed.
Step 1
Step 2
Step 3
Step 4
(optional)
Step 5
GB/T 2423.45 ---1997
Climate type 40//~
Climate type 55／—／—,
Climate type 65/~
Climate type —／21
Climate type／56
5 cycles (method 1)
1 cycle (method 3)
Visual, dimensional and functional inspection within 15min (when specified)—
8.2.5h)
Recovery— 8.2. 5c)
Visual, dimensional and functional testing
Extended recovery (where specified), visual, dimensional and functional testing—
Climate type +5／
Climate type 05/
Climate type 10/
Climate type 25／／/
Climate type／—/04
Climate type 10
Aa, Ba, Db and M refer to the test methods of IEC 68-2. The chapter number is the chapter number of this standard.
2*” indicates that the interval time in this stage is not allowed to be longer than 72h. Figure 1 Method 1 and Method 3
Step 1
Step 2
Step 3
Step 4
(Optional)
Step 5
GB/T 2423.45
5:1997
Initial inspection
Visual, dimensional and functional inspection within 15min (when specified) -
8.2.5b)
【Recovery—8.2.5c)
Self-visual, dimensional and functional inspection
Extended recovery (when specified), visual, dimensional and functional inspection
★At these points
Aa, Ba, Dh and M are the test methods of IEC68-2, and the chapter number is the number of this standard.
*Indicates that the interval time at this stage is not allowed to be longer than 72h. 2
Figure 2 Method 2 (Apparatus suitable for climate type -/-/56) Schedule
GB/T 2423.45-1997
Duration of operation (hours)
Manual operation
Working day
08:00-
Automatic operation
Loading samples
Temperature stabilization
Unloading samples
Loading samples
Temperature stabilization
Humidity stabilization
1st cycle
Unloading samples
Loading samples
Temperature stabilization
Unloading samples
10:24 -
Remove water drops
Install sample
Low pressure
Test: Measurement
Remove sample
12:30-
Install sample
Temperature stabilization
Humidity stabilization
2nd cycle
3rd to 6th cycle
Remove sample
１Recovery
1The first four columns in italics are specific examples.
Chapter, Article
IEC Standard
68 - 2-2
Section 1
68 -2 -30:
68 2 -1
Section 1
68 2— 13
6.368-2-30
2 In this example, the last item in the climate sequence starts on Thursday. 3 Figure 4 shows a climate sequence and a graphical representation. This standard
Test step name
Step 1
Step 2
Damp heat and humidity
Step 3
Step 4
Low pressure
(optional)
Step 5
5-cycle damp heat
Figure 3 Recommended format of the schedule for determination method 1 and its application example (see B1)+ 1
Sub-clause
Step 1
GB/T 2423.45
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 52) Consequences. The time taken by the intermediate tests must be added to the exposure duration, which increases the practical difficulty of taking into account normal working time and increases the test cost.
The above intermediate tests do not help to achieve the purpose of this test, namely the effects under a series of climatic stresses. Generally speaking, they only replace several separate tests that can be carried out on other test samples that are not carried out simultaneously with this climatic sequence test. Therefore, careful consideration should be given before specifying intermediate tests.
A2 Recovery
The time for the test sample to reach equilibrium depends on its thermal inertia, that is, on the shape, mass and structure of the test sample. For the wood standard, the recovery time is selected as 1h, which is suitable for the smallest test sample; for other test samples, especially equipment test samples, the relevant specifications should specify a moderate recovery time. Appendix B
(Informative Appendix)
Guidelines for the Implementation of the Test
B1 Operation Schedule
The attention of the person carrying out this test is drawn up to the need to prepare an accurate operation schedule so that this sequence can be carried out correctly and in accordance with normal working hours as closely as possible. Figure 3 gives an example of method 1. The total time for the various test steps is not fixed but depends on the time required for the intermediate measurements at the end of step 1 and step 3 and the thawing time after the end of step 3. In addition, an allowance must be made for the recovery time if it is more than 1 h. B2 The guidelines IEC 68-2-1 and 68-2-1A, 68-2-2 and 68-2-2A, 68-2-13 and 68-2-30 must be considered together with IEC 68-2-28 and 68-3-1.
B3 Use of Special Test Chambers
Special test chambers are chambers that can continuously meet the various conditions specified in different test steps in one chamber. Special care should be taken when using such chambers. Such chambers often have difficulty meeting the required recovery conditions due to the presence of thermal inertia or condensed water after the application of the previous environmental stress.
The transition between the damp heat test step and the low temperature test step is correct only if the test specimens are removed from the chamber while the conditions inside the chamber are changing. In fact, the drying that occurs during the recovery period after the damp heat test is only partial and is not equivalent to the drying in the following processes:
When the test specimens are placed in a cooled low temperature test chamber, the water contained in the test specimens will freeze rapidly; when the test chamber with the test specimens inside is cooled, the drying occurs during the cooling process before freezing, and the water contained in the test specimens may be partially removed.
Step 1
Step 2
Step 3
Step 4
(optional)
Step 5
GB/T 2423.45 ---1997
Climate type 40//~
Climate type 55／—／—,
Climate type 65/~
Climate type —／21
Climate type／56
5 cycles (method 1)
1 cycle (method 3)
Visual, dimensional and functional inspection within 15min (when specified)—
8.2.5h)
Recovery— 8.2. 5c)
Visual, dimensional and functional testing
Extended recovery (where specified), visual, dimensional and functional testing—
Climate type +5／
Climate type 05/
Climate type 10/
Climate type 25／／/
Climate type／—/04
Climate type 10
Aa, Ba, Db and M refer to the test methods of IEC 68-2. The chapter number is the chapter number of this standard.
2*” indicates that the interval time in this stage is not allowed to be longer than 72h. Figure 1 Method 1 and Method 3
Step 1
Step 2
Step 3
Step 4
(Optional)
Step 5
GB/T 2423.45
5:1997
Initial inspection
Visual, dimensional and functional inspection within 15min (when specified) -
8.2.5b)
【Recovery—8.2.5c)
Self-visual, dimensional and functional inspection
Extended recovery (when specified), visual, dimensional and functional inspection
★At these points
Aa, Ba, Dh and M are the test methods of IEC68-2, and the chapter number is the number of this standard.
*Indicates that the interval time at this stage is not allowed to be longer than 72h. 2
Figure 2 Method 2 (Apparatus suitable for climate type -/-/56) Schedule
GB/T 2423.45-1997
Duration of operation (hours)
Manual operation
Working day
08:00-
Automatic operation
Loading samples
Temperature stabilization
Unloading samples
Loading samples
Temperature stabilization
Humidity stabilization
1st cycle
Unloading samples
Loading samples
Temperature stabilization
Unloading samples
10:24 -
Remove water drops
Install sample
Low pressure
Test: Measurement
Remove sample
12:30-
Install sample
Temperature stabilization
Humidity stabilization
2nd cycle
3rd to 6th cycle
Remove sample
１Recovery
1The first four columns in italics are specific examples.
Chapter, Article
IEC Standard
68 - 2-2
Section 1
68 -2 -30:
68 2 -1
Section 1
68 2— 13
6.368-2-30
2 In this example, the last item in the climate sequence starts on Thursday. 3 Figure 4 shows a climate sequence and a graphical representation. This standard
Test step name
Step 1
Step 2
Damp heat and humidity
Step 3
Step 4
Low pressure
(optional)
Step 5
5-cycle damp heat
Figure 3 Recommended format of the schedule for determination method 1 and its application example (see B1)+ 1
Sub-clause
Step 1
GB/T 2423.45
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 52) Consequences. The time taken by the intermediate tests must be added to the exposure duration, which increases the practical difficulty of taking into account normal working time and increases the test cost.
The above intermediate tests do not help to achieve the purpose of this test, namely the effects under a series of climatic stresses. Generally speaking, they only replace several separate tests that can be carried out on other test samples that are not carried out simultaneously with this climatic sequence test. Therefore, careful consideration should be given before specifying intermediate tests.
A2 Recovery
The time for the test sample to reach equilibrium depends on its thermal inertia, that is, on the shape, mass and structure of the test sample. For the wood standard, the recovery time is selected as 1h, which is suitable for the smallest test sample; for other test samples, especially equipment test samples, the relevant specifications should specify a moderate recovery time. Appendix B
(Informative Appendix)
Guidelines for the Implementation of the Test
B1 Operation Schedule
The attention of the person carrying out this test is drawn up to the need to prepare an accurate operation schedule so that this sequence can be carried out correctly and in accordance with normal working hours as closely as possible. Figure 3 gives an example of method 1. The total time for the various test steps is not fixed but depends on the time required for the intermediate measurements at the end of step 1 and step 3 and the thawing time after the end of step 3. In addition, an allowance must be made for the recovery time if it is more than 1 h. B2 The guidelines IEC 68-2-1 and 68-2-1A, 68-2-2 and 68-2-2A, 68-2-13 and 68-2-30 must be considered together with IEC 68-2-28 and 68-3-1.
B3 Use of Special Test Chambers
Special test chambers are chambers that can continuously meet the various conditions specified in different test steps in one chamber. Special care should be taken when using such chambers. Such chambers often have difficulty meeting the required recovery conditions due to the presence of thermal inertia or condensed water after the application of the previous environmental stress.
The transition between the damp heat test step and the low temperature test step is correct only if the test specimens are removed from the chamber while the conditions inside the chamber are changing. In fact, the drying that occurs during the recovery period after the damp heat test is only partial and is not equivalent to the drying in the following processes:
When the test specimens are placed in a cooled low temperature test chamber, the water contained in the test specimens will freeze rapidly; when the test chamber with the test specimens inside is cooled, the drying occurs during the cooling process before freezing, and the water contained in the test specimens may be partially removed.
Step 1
Step 2
Step 3
Step 4
(optional)
Step 5
GB/T 2423.45 ---1997
Climate type 40//~
Climate type 55／—／—,
Climate type 65/~
Climate type —／21
Climate type／56
5 cycles (method 1)
1 cycle (method 3)
Visual, dimensional and functional inspection within 15min (when specified)—
8.2.5h)
Recovery— 8.2. 5c)
Visual, dimensional and functional testing
Extended recovery (where specified), visual, dimensional and functional testing—
Climate type +5／
Climate type 05/
Climate type 10/
Climate type 25／／/
Climate type／—/04
Climate type 10
Aa, Ba, Db and M refer to the test methods of IEC 68-2. The chapter number is the chapter number of this standard.
2*” indicates that the interval time in this stage is not allowed to be longer than 72h. Figure 1 Method 1 and Method 3
Step 1
Step 2
Step 3
Step 4
(Optional)
Step 5
GB/T 2423.45
5:1997
Initial inspection
Visual, dimensional and functional inspection within 15min (when specified) -
8.2.5b)
【Recovery—8.2.5c)
Self-visual, dimensional and functional inspection
Extended recovery (when specified), visual, dimensional and functional inspection
★At these points
Aa, Ba, Dh and M are the test methods of IEC68-2, and the chapter number is the number of this standard.
*Indicates that the interval time at this stage is not allowed to be longer than 72h. 2
Figure 2 Method 2 (Apparatus suitable for climate type -/-/56) Schedule
GB/T 2423.45-1997
Duration of operation (hours)
Manual operation
Working day
08:00-
Automatic operation
Loading samples
Temperature stabilization
Unloading samples
Loading samples
Temperature stabilization
Humidity stabilization
1st cycle
Unloading samples
Loading samples
Temperature stabilization
Unloading samples
10:24 -
Remove water drops
Install sample
Low pressure
Test: Measurement
Remove sample
12:30-
Install sample
Temperature stabilization
Humidity stabilization
2nd cycle
3rd to 6th cycle
Remove sample
１Recovery
1The first four columns in italics are specific examples.
Chapter, Article
IEC Standard
68 - 2-2
Section 1
68 -2 -30:
68 2 -1
Section 1
68 2— 13
6.368-2-30
2 In this example, the last item in the climate sequence starts on Thursday. 3 Figure 4 shows a climate sequence and a graphical representation. This standard
Test step name
Step 1
Step 2
Damp heat and humidity
Step 3
Step 4
Low pressure
(optional)
Step 5
5-cycle damp heat
Figure 3 Recommended format of the schedule for determination method 1 and its application example (see B1)+ 1
Sub-clause
Step 1
GB/T 2423.45
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545 ---1997
Climate type 40//~
Climate type 55／—／—,
Climate type 65/~
Climate type —／21
Climate type／56
5 cycles (method 1)
1 cycle (method 3)
Visual, dimensional and functional inspection within 15min (when specified)—
8.2.5h)
Recovery— 8.2. 5c)
Visual, dimensional and functional testing
Extended recovery (where specified), visual, dimensional and functional testing—
Climate type +5／
Climate type 05/
Climate type 10/
Climate type 25／／/
Climate type／—/04
Climate type 10
Aa, Ba, Db and M refer to the test methods of IEC 68-2. The chapter number is the chapter number of this standard.
2*” indicates that the interval time in this stage is not allowed to be longer than 72h. Figure 1 Method 1 and Method 3
Step 1
Step 2
Step 3
Step 4
(Optional)
Step 5
GB/T 2423.45
5:1997
Initial inspection
Visual, dimensional and functional inspection within 15min (when specified) -
8.2.5b)
【Recovery—8.2.5c)
Self-visual, dimensional and functional inspection
Extended recovery (when specified), visual, dimensional and functional inspection
★At these points
Aa, Ba, Dh and M are the test methods of IEC68-2, and the chapter number is the number of this standard.
*Indicates that the interval time at this stage is not allowed to be longer than 72h. 2
Figure 2 Method 2 (Apparatus suitable for climate type -/-/56) Schedule
GB/T 2423.45-1997
Duration of operation (hours)
Manual operation
Working day
08:00-
Automatic operation
Loading samples
Temperature stabilization
Unloading samples
Loading samples
Temperature stabilization
Humidity stabilization
1st cycle
Unloading samples
Loading samples
Temperature stabilization
Unloading samples
10:24 -
Remove water drops
Install sample
Low pressure
Test: Measurement
Remove sample
12:30-
Install sample
Temperature stabilization
Humidity stabilization
2nd cycle
3rd to 6th cycle
Remove sample
１Recovery
1The first four columns in italics are specific examples.
Chapter, Article
IEC Standard
68 - 2-2
Section 1
68 -2 -30:
68 2 -1
Section 1
68 2— 13
6.368-2-30
2 In this example, the last item in the climate sequence starts on Thursday. 3 Figure 4 shows a climate sequence and a graphical representation. This standard
Test step name
Step 1
Step 2
Damp heat and humidity
Step 3
Step 4bzxZ.net
Low pressure
(optional)
Step 5
5-cycle damp heat
Figure 3 Recommended format of the schedule for determination method 1 and its application example (see B1)+ 1
Sub-clause
Step 1
GB/T 2423.45
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 545 ---1997
Climate type 40//~
Climate type 55／—／—,
Climate type 65/~
Climate type —／21
Climate type／56
5 cycles (method 1)
1 cycle (method 3)
Visual, dimensional and functional inspection within 15min (when specified)—
8.2.5h)
Recovery— 8.2. 5c)
Visual, dimensional and functional testing
Extended recovery (where specified), visual, dimensional and functional testing—
Climate type +5／
Climate type 05/
Climate type 10/
Climate type 25／／/
Climate type／—/04
Climate type 10
Aa, Ba, Db and M refer to the test methods of IEC 68-2. The chapter number is the chapter number of this standard.
2*” indicates that the interval time in this stage is not allowed to be longer than 72h. Figure 1 Method 1 and Method 3
Step 1
Step 2
Step 3
Step 4
(Optional)
Step 5
GB/T 2423.45
5:1997
Initial inspection
Visual, dimensional and functional inspection within 15min (when specified) -
8.2.5b)
【Recovery—8.2.5c)
Self-visual, dimensional and functional inspection
Extended recovery (when specified), visual, dimensional and functional inspection
★At these points
Aa, Ba, Dh and M are the test methods of IEC68-2, and the chapter number is the number of this standard.
*Indicates that the interval time at this stage is not allowed to be longer than 72h. 2
Figure 2 Method 2 (Apparatus suitable for climate type -/-/56) Schedule
GB/T 2423.45-1997
Duration of operation (hours)
Manual operation
Working day
08:00-
Automatic operation
Loading samples
Temperature stabilization
Unloading samples
Loading samples
Temperature stabilization
Humidity stabilization
1st cycle
Unloading samples
Loading samples
Temperature stabilization
Unloading samples
10:24 -
Remove water drops
Install sample
Low pressure
Test: Measurement
Remove sample
12:30-
Install sample
Temperature stabilization
Humidity stabilization
2nd cycle
3rd to 6th cycle
Remove sample
１Recovery
1The first four columns in italics are specific examples.
Chapter, Article
IEC Standard
68 - 2-2
Section 1
68 -2 -30:
68 2 -1
Section 1
68 2— 13
6.368-2-30
2 In this example, the last item in the climate sequence starts on Thursday. 3 Figure 4 shows a climate sequence and a graphical representation. This standard
Test step name
Step 1
Step 2
Damp heat and humidity
Step 3
Step 4
Low pressure
(optional)
Step 5
5-cycle damp heat
Figure 3 Recommended format of the schedule for determination method 1 and its application example (see B1)+ 1
Sub-clause
Step 1
GB/T 2423.45
1h302h
Step 2
Step 3
Step 4
Low pressure
Schedule diagram of climate sequence test
24h or t20h
Step 5
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.