This standard specifies the test methods for dripping, flushing and immersion. The main purpose of the test is to assess whether the housing and seals of electrical and electronic products can ensure the good working performance of the equipment and parts after or during the water test. This standard includes artificial rain tests based on natural conditions, but does not include rainfall with strong wind speed. This standard does not consider the large amount of water inflow caused by the temperature difference between the test sample and the rain temperature. This standard is applicable to electrical and electronic products (including parts) that may be affected by dripping, flushing and immersion during transportation or use, and can be used as a reference for product technical standards. GB/T 2423.38-1990 Basic Environmental Test Procedures for Electrical and Electronic Products Test R: Water Test Method GB/T2423.38-1990 Standard Download Decompression Password: www.bzxz.net

National Standard of the People's Republic of China
Basic environmental test procedures for electric and electronic productsTest R: Water test method
1 Subject content and scope of application
GB 2423.38 90
This standard specifies the test methods for dripping, flushing and immersion. The main purpose of the test is to assess whether the housing and seals of electric and electronic products can ensure the good working performance of equipment and components after or during the water test. This standard includes artificial rain tests based on natural conditions, but does not include rainfall with strong wind speed. This standard does not consider the large amount of water inflow caused by the temperature difference between the temperature of the test sample and the temperature of rainwater (such as pressure changes and thermal shock). This standard is applicable to electric and electronic products (including components) that may be affected by dripping, flushing and flooding during transportation or use, and can be used as a reference for product technical standards.
2 Reference standards
GB2424.23 Basic environmental test procedures for electric and electronic products Water test guide GB5170.38 Basic parameter verification methods for environmental test equipment for electric and electronic products Water test equipment 3 Composition of test methods (see Figure 1)
There are three types of water tests:
Test Ra dripping water is a test conducted by artificially simulating rainfall. Test Rb: flushing water - a high-intensity dripping field or a jet of water impacts the test sample with a certain force. The dripping field can impact the test sample at any angle.
Test Rc: immersion
The test sample is immersed in water of a specified depth or equivalent pressure. Approved by the State Bureau of Technical Supervision on July 16, 1990, 199103-01 for implementation
Dripping Ra
Method Ral
Artificial rain method
Method Ra2
Dripping box method
4 Test Ra: Dripping
4.1 Day
GB 2423.38
Water test R
Flushing Rb
Method Rbl
High-intensity dripping field method
Method Rb2
Water spray method
Method Rb2.1
Oscillating pipe method
Method Rb2.2
Hand-held decanter method
Method Rb3
Composition of test method
Immersion RC
Method Rcl
Water tank method
Method Rc2
Pressurized water tank method
This test is used for electrical and electronic products that may be subjected to vertical dripping during transportation or use. This test simulates the effects of natural rainfall, leakage and condensation.
4.2 Method Ra1: Artificial Rain Method
4.2.1 General description of the test
The test sample shall be mounted on an appropriate fixture and then subjected to dripping water simulating natural rain. 4.2.2 Test equipment requirements
4.2.2.1 The dripping water test equipment of the artificial rain method consists of one or more water nozzles with a solid cone inside (see GB2124.23 8.1.1.1)
4.2.2.2 The base area of ​​the fixture shall be smaller than the base area of ​​the test sample. The supporting table shall have appropriate small holes and can also support the test sample to make it in normal working state. The base plane can be freely adjusted to a maximum of 90°. 4.2.2.3 The test water shall be clean tap water. In order to avoid nozzle blockage and cold, the water shall be filtered and softened. The initial water temperature shall generally be consistent with the test sample temperature. If it is lower than the test sample temperature, the temperature difference shall not be less than 5K. 4.2.3 Severity level
The rainfall intensity, droplet size, duration and spray or tilt angle requirements of the test sample can be selected from the table! 362
Rainfall intensity
100-±20
100±50
GB2423.38--90
Droplet size (Dso\)
Note: 1) Dso is the median volume diameter, see GB2424.23. 4.2.4 Pretreatment
Duration
Put the test sample under normal test atmospheric conditions until the temperature stabilizes. 4.2.5 Initial inspection
Spray or tilt angle α
The test sample should be inspected for appearance according to the requirements of relevant standards or technical documents, including surface treatment, sealing inspection of the housing or seal. And electrical and mechanical performance inspections.
4.2.6 Conditional test
4.2.6.1 The test sample shall be subjected to the artificial rain test according to the level selected in Table 1 of Article 4.2.3 of this standard. 4.2.6.2 The test sample may be installed on the test fixture in any of the following states. The test sample is installed in normal working state; a.
b. Installed at an angle to the normal working state (see Figure 2). Figure 2 Universal rotating support table
4.2.6.3 The test sample rotates on a plane perpendicular to the tilt axis. The rotation can be achieved by using a rotating table or by changing the position of the test sample from time to time during the test.
The rotation of the test sample can be replaced by a 270° arc swing to avoid the use of a slip ring connection between the table and the test sample. 4.2.6.4 The inclination angle of the test sample, the surface exposed to the drip field and the exposure duration of each inclined surface, or whether the test sample should rotate continuously (or swing 270°) should be specified by the product standard or technical document: 4.2.6.5 During the conditional test, whether the test sample is run or intermediate inspection is carried out should be specified by the product standard or technical document. 363
4.2.7 Final inspection
GB 2423.38-90
The test sample should be checked for water seepage and electrical and mechanical performance tests should be carried out in accordance with the relevant product standards or technical documents. 4.2.8
Details to be specified when this standard is used
Preconditioning (4.2.4);
Initial test (4.2.5);
Grade of severity (4.2.3);
Mounting of test specimens (4.2.6.2);
Position of test specimens during conditioning tests (4.2.6.3); Condition of test specimens during conditioning tests (4.2.6.4); g.
Intermediate tests (4.2.6.5);
Final test (4.2.7).
4.3 Method Ra2: Drip box method
4.3.1 General description of the test
The test specimens are mounted on a suitable device below a drip box and are subjected to dripping water simulating condensation and leakage. 4.3.2 Requirements for test equipment
4.3.2.1 The dripping device is a rectangular water storage container with many small holes arranged in a grid at a spacing of 20 to 25 mm at the bottom. The holes are equipped with 0.4 mm water nozzles. A spare water tank connected to the main water tank can be adjusted up and down to provide sufficient rainfall. 4.3.2.2 The dripping tank should be able to provide a uniform dripping field with a rainfall intensity of 200 to 300 mm/h. 4.3.2.3 The bottom area of ​​the dripping tank should be twice the bottom area of ​​the test sample, and the distance from the bottom of the dripping tank to the top of the test sample should be between 0.2 and 2 m.
4.3.2.4 The base area of ​​the test sample fixture should be smaller than the base area of ​​the test sample. The fixture should be able to support the test sample so that it is in normal working condition and the maximum inclination with the vertical plane is 45°. 4.3.2.5 The test water should comply with the provisions of Article 4.2.2.3. 4.3.3 Severity level
Rainfall intensity
4.3.4 Pretreatment
Water droplet falling height
Tilt angle α
Duration
If the relevant product standards or technical documents have requirements, the sealing part of the test sample shall be pretreated in accordance with the provisions of Article 4.2.4. 4.3.5 Initial measurement
According to Article 4.2.5.
4.3.6 Condition test
4.3.6.1 The test sample shall be subjected to the drip test in accordance with the provisions of Table 2 of Article 4.3.3. 4.3.6.2 The installation requirements of the test sample shall be in accordance with Article 4.2.6.2. 4.3.6.3 Whether the test sample is operated or intermediately tested during the test shall be specified by the relevant standards or technical documents. 4.3.7 Final test
According to Article 4.2.7.
4.3.8 Details to be specified when citing this standard 364
According to 4.2.8.
5 Test Rb: Flushing
5.1 Purpose
GB 2423.38
This test is applicable to electrical and electronic products that may be exposed to water during transportation or use. This test simulates the effects of water such as heavy rain, wind-driven rain, sprinkler systems, wheel splashing, washing or violent waves. 5.2 Method Rbl: High-intensity drip field method
5.2.1 General description of the test
The test sample is installed on an appropriate fixture and then subjected to the high-intensity drip test. 5.2.2 Test equipment requirements
5.2.2.1 The test equipment for the high-intensity drip field method shall comply with the provisions of Article 4.2.2.5.2.2.2 The fixture of the test sample shall be smaller than the base area of ​​the test sample, have small holes, and be able to support the test sample to be in normal working condition, and can be tilted to a maximum of 90° from the vertical plane.5.2.2.3 The water used for the test shall comply with the provisions of Article 4.2.2.3. 5.2.3 Severity level
Rainfall intensity
1 000±150
2000±300
4000±600
5.2.4 Pretreatment
As specified in 4.3.4.
5.2.5 Initial test
As specified in 4.2.5.
5.2.6 Condition test
Duration
5.2.6.1 The test sample shall be subjected to high-intensity drip test as specified in 5.2.3. 5.2.6.2 The installation requirements of the test sample shall be as specified in 4.2.6.2. Inclination angle α
About 180
5.2.6.3 Whether the test sample is operated or intermediate measurement is carried out during the test shall be specified by the relevant standards or technical documents. 5.2.7 Final test
According to 4.2.7.
5.2.8 Details to be specified when this standard is used a.
Pretreatment (5.2.4);
Initial test (5.2.5);
Severity level (5.2.3);
Installation of test samples (5.2.6.2);
Position of test samples during conditional test (5.2.6.3); 363
Intermediate test (5.2.6.3);
g. Final test (5.2.7).
GB 2423.38
5.3 Test Rb2: Oscillating tube method and hand-held water dispenser method 5.3.1 General description of the test
This test can be carried out by either the oscillating tube method or the hand-held sprinkler method. The test sample is installed on an appropriate fixture to withstand the flushing test generated by the semicircular elbow. If the sample is too large to be tested by the oscillating tube method, the hand-held sprinkler method is used. 5.3.2 Method Rb2.1: Oscillating tube method
5.3.2.1 Test equipment requirements
The oscillating tube should take into account the size of the test sample as much as possible, and the radius of the elbow should be 1000mm or 1600mm. The tube should be equipped with a nozzle with a center distance of 50mm within the specified angle range, and the tube should be able to swing 180° as much as possible; b. The support table for installing the test sample should have holes to avoid acting as a water baffle, and it should also be able to rotate; c. The test water should comply with the provisions of Article 4.2.2.3. 5.3.2.2 Severity level
Nozzle angle α
5.3.2.3 Pretreatment
Pipe swing angle 8
As specified in 4.3.4.
5.3.2.4 Initial inspection
As specified in 4.2.5.
5.3.2.5 Conditional test
Duration
The test sample shall be subjected to water spray test in accordance with the provisions of 5.3.2.2; a
Nozzle diameter
Water flow
0. 1±0.005
0.60±0.03
Approximate water flow pressure
The test sample shall be installed on the fixture in normal working state, and its fixture shall rotate around the vertical axis at an appropriate speed. b.
When the test time is half, the horizontal rotation continues the test. c.
The swing tube swings within the specified angle at a speed of approximately 60°/s; During the conditional test, whether the test sample is running or undergoing intermediate testing shall be in accordance with the provisions of 4.2.6.5. d.
5.3.2.6 Final test
In accordance with the provisions of 4.2.7.
Details to be specified when citing this standard
Pretreatment (5.3.2.3);
Initial test (5.3.2.4);
Severity level (5.3.2.2);
Installation of test samples (5.3.2.1b); Position of test samples during conditional test (5.3.2.5b); Intermediate test (5.3.2.5d);
Final test (5.3.2.6).
5.3.3 Method Rb2.2: Hand-held sprinkler method
General description of the test
GB 2423.38—90
Whether the entire surface of the test sample is sprayed and whether a baffle is used shall be specified by the relevant standards or technical documents. 5.3.3.2 Requirements for test equipment
a. The hand-held sprinkler consists of a nozzle with a spray angle of 78° and a reverse balanced movable baffle that can limit the upper part of the spray cone to 30° from the horizontal. The baffle can be rotated as required. Under the condition of water pressure of 80~100kPa (0.8~~1.0bar), the water flow rate of the nozzle is 10±0.5L/min;
b. The support table for installing the test sample shall comply with the provisions of 5.3.2.1 b; the test water requirements shall comply with the provisions of 5.3.2.1 c. c
5.3.3.3 Severity level
Test time per square meter of test sample surface area min/m2
5.3.3.4 Pretreatment
According to the provisions of 4.3.4.
5.3.3..5 Initial detection
According to the provisions of 4.2.5.
5.3.3.6 Conditional test
The test sample shall be subjected to the water splash test in accordance with the provisions of Article 5.3.3. 1
Minimum duration
When using a hand-held sprinkler for testing, water shall be sprayed in all directions within a distance of 300~500mm from the test sample. b.
Whether the test sample is operated or intermediate tests are carried out during the test shall be in accordance with the provisions of Article 4.2.6.5. c
5.3.3.7 Final test
In accordance with the provisions of Article 4.2.7.
5.3.3.8 Details to be specified when this standard is used Pretreatment (5.3.3.4);
Initial test (5.3.3.5);
Severity level (5.3.3.3);
Mounting of test specimens (5.3.3.2b); Position of test specimens during conditioning tests (5.3.3.2b); Intermediate tests (5.3.3.6c);
Final test (5.3.3.7).
5.4 Method Rb3: Hose method
5.4.1 General description of the test
This test is to install the test specimen in a fixture and subject it to water simulating wheel splashing, water rushing or violent waves. 5.4.2 Requirements for test equipment
The equipment is a cone with smooth inner surface and no obstacles. The nozzle diameters are 6.3mm and 12.5mm respectively. The fixture for installing the test sample shall be in accordance with the provisions of 5.3.2.1 b. b.
The test water shall be in accordance with the provisions of 4.2.2.3.
5.4.3 Severity level
Nozzle diameter
Test duration is shown in the table.
Test time per square meter of test sample surface area min/m2
Pretreatment
As specified in 4.3.4.
Initial measurement
As specified in 4.2.5.
Conditional test
GB 2423.38 -- 90
Water spray intensity
100±5
Duration
The test sample is sprayed with water from all directions to all surfaces according to 5.4.3; water flow pressure
Only applicable to nozzles with a diameter of 6.3mm, the nozzle water flow pressure is 1000kPa
The test sample should be installed on a rotating table in accordance with 5.3.2.1 b in normal working state for testing: the test time, nozzle size and water spray intensity are in accordance with 5.4.3; the distance from the nozzle to the test sample is 2.5+0.5m. When the nozzle is facing upward, the distance can be shortened to ensure the need to wet the sample. 5.4.7
Final test
According to 4.2.7.
5.4.8 The detailed rules to be specified when citing this standard shall be in accordance with 5.2.8.
6Test Rc: Flooding
6.January
This test is applicable to electrical and electronic products that are designed to be waterproof and can be partially or completely immersed in water during transportation or use.
Relevant standards or technical documents should clearly specify whether the electrical and electronic products under test (hereinafter referred to as test samples) are in operation during the conditional test or only need to withstand immersion conditions. In either case, the allowable tolerance of product performance should be specified. 6.2 Method Rcl: Water Tank Method
6.2.1 General description of the test
The test sample is subjected to the specified immersion pressure in a water tank of specified depth. After the conditional test, the test sample should be checked for water seepage and changes in sample performance.
6.2.2 Severity level
6.2.3 Pretreatment
Immersion depth
As specified in Article 4.3.4.
6.2.4 Initial test
GB 2423.38.--90
Duration
Perform visual inspection, electrical and mechanical performance measurement on the test samples in accordance with relevant standards or technical documents. All test sample performances that may affect the housing or seal should be checked.
6.2.5 Conditional test
6.2.5.1 The test samples shall be immersed in water in accordance with the provisions of Article 6.2.2. The specified water head value shall be measured upward from the highest point of the test sample in the water.
6.2.5.2 The test samples shall be placed in the state specified in the relevant regulations and fully immersed in the water tank. In order to facilitate the display of leakage, it is allowed to add soluble dyes such as fluorescein to the water.
6.2.5.3 The test water is usually tap water. If there is a seawater test, it should be stated in the relevant standards or technical documents. The water temperature should generally be consistent with the test sample temperature. If it is lower than the test sample temperature, the temperature difference must not be less than 5K. At this time, the maximum water temperature must not exceed 35°C. 6.2.5.4 Whether the sample is operated or intermediate measurements are performed during the test is specified by the relevant standards or technical documents. 6.2.6 Recovery
Unless otherwise specified in the relevant standards or technical conditions, the test sample should be wiped or blown with wind at room temperature to make its exterior completely dry. 6.2.7 Final inspection
According to the provisions of Article 4.2.7.
6.2.8 Details to be specified when this standard is used a.
Pretreatment (6.2.3);
Initial test (6.2.4);
Severity level (6.2.2);
Installation of test sample (6.2.5.1);
The position or condition of the test sample during the test (6.2.5.2); Intermediate test (6.2.5.4);
Whether to use seawater (6.2.5.3);
Recovery (6.2.6);
Final test (6.2.7).
6.3 Test Rc2: Pressurized water tank method
6.3.1 General description of the test
The test sample shall be subjected to the specified immersion pressure test in a pressurized water tank, and the water seepage and performance changes of the test sample shall be checked after the condition test.
6.3.2 Severity level
6.3.3 Pretreatment
GB 2423.38--90
Equivalent flooding depth
Duration
If specified in the relevant standards or technical documents, the test samples and sealing parts shall be pretreated in accordance with the provisions of Article 4.2.4. 6.3.4 Initial inspection
In accordance with the provisions of Article 6.2.4.
6.3.5 Conditional test
6.3.5.1 The test samples shall be pressurized according to the high pressure specified in Article 6.3.2. 6.3.5.2 The test samples shall be placed in the specified state and fully immersed in the pressurized water tank. In order to facilitate the display of leakage, soluble dyes such as fluorescein may be added to the water.
6.3.5.3 The test water shall be in accordance with the provisions of Article 6.2.5.3. 6.3.5.4 Whether the test sample is operated or intermediate measurements are carried out during the conditioning test shall be specified by the relevant standards or technical documents. 6.3.6 Recovery
As specified in 6.2.6.
6.3.7 Final test
As specified in 4.2.7.
Details to be specified when this standard is cited
Pretreatment (6.3.3);
Initial test (6.3.4);
Severity level (6.3.2);
Installation of test sample (6.3.5.1);
Location of test sample or status during conditioning test (6.3.5.2); Intermediate test (6.3.5.4);
Whether to use seawater (6.3.5.3);
Recovery (6.3.6);
Final test (6.3.7).
Additional Notes:
2423.38-90
This standard was proposed by the National Technical Committee for Standardization of Environmental Conditions for Electrical and Electronic Products and is under the jurisdiction of the National Technical Committee for Standardization of Environmental Conditions for Electrical and Electronic Products.
This standard was drafted by the Standardization Research Office of the Seventh Institute of China State Shipbuilding Corporation, and was drafted by the Guangzhou Electric Science Research Institute, the Standardization Institute of the Ministry of Communications, the Mingshui Communication Machinery Factory of the Ministry of Posts and Telecommunications, the Shanghai Electric Research Institute, and the 301 Institute of the Ministry of Aerospace. The main drafters of this standard are Huang Yuzhou, Wei Zhuyun, Shi Taisheng, Yu Yingkai, and Shang Qiumei. 3715 Conditioning test
6.3.5.1 The test sample is subjected to pressure test at the high pressure specified in 6.3.2. 6.3.5.2 The test sample is placed in the specified state and completely immersed in the pressurized water tank. In order to facilitate the display of leakage, it is allowed to add soluble dyes such as fluorescein to the water.
6.3.5.3 The test water shall be in accordance with 6.2.5.3. 6.3.5.4 Whether the test sample is operated or intermediate measurements are carried out during the conditioning test shall be specified by the relevant standards or technical documents. 6.3.6 Recovery
As specified in 6.2.6.
6.3.7 Final inspection
As specified in 4.2.7.
Details to be specified when citing this standard
Pretreatment (6.3.3);
Initial test (6.3.4);bZxz.net
Severity level (6.3.2);
Installation of test samples (6.3.5.1);
The position or condition of the test samples during the test (6.3.5.2); Intermediate test (6.3.5.4);
Whether to use seawater (6.3.5.3);
Recovery (6.3.6);
Final test (6.3.7).
Additional notes:
2423.38-90
This standard was proposed by the National Technical Committee for Standardization of Environmental Conditions for Electrical and Electronic Products and is under the jurisdiction of the National Technical Committee for Standardization of Environmental Conditions for Electrical and Electronic Products.
This standard was drafted by the Standardization Research Office of the Seventh Institute of China State Shipbuilding Corporation, and was drafted by Guangzhou Electric Science Research Institute, Standardization Institute of the Ministry of Communications, Mingshui Communication Machinery Factory of the Ministry of Posts and Telecommunications, Shanghai Electric Research Institute, and 301 Institute of the Ministry of Aerospace. The main drafters of this standard are Huang Yuzhou, Wei Zhuyun, Shi Taisheng, Yu Yingkai, and Shang Qiumei.5 Conditioning test
6.3.5.1 The test sample is subjected to pressure test at the high pressure specified in 6.3.2. 6.3.5.2 The test sample is placed in the specified state and completely immersed in the pressurized water tank. In order to facilitate the display of leakage, it is allowed to add soluble dyes such as fluorescein to the water.
6.3.5.3 The test water shall be in accordance with 6.2.5.3. 6.3.5.4 Whether the test sample is operated or intermediate measurements are carried out during the conditioning test shall be specified by the relevant standards or technical documents. 6.3.6 Recovery
As specified in 6.2.6.
6.3.7 Final inspection
As specified in 4.2.7.
Details to be specified when citing this standard
Pretreatment (6.3.3);
Initial test (6.3.4);
Severity level (6.3.2);
Installation of test samples (6.3.5.1);
The position or condition of the test samples during the test (6.3.5.2); Intermediate test (6.3.5.4);
Whether to use seawater (6.3.5.3);
Recovery (6.3.6);
Final test (6.3.7).
Additional notes:
2423.38-90
This standard was proposed by the National Technical Committee for Standardization of Environmental Conditions for Electrical and Electronic Products and is under the jurisdiction of the National Technical Committee for Standardization of Environmental Conditions for Electrical and Electronic Products.
This standard was drafted by the Standardization Research Office of the Seventh Institute of China State Shipbuilding Corporation, and was drafted by Guangzhou Electric Science Research Institute, Standardization Institute of the Ministry of Communications, Mingshui Communication Machinery Factory of the Ministry of Posts and Telecommunications, Shanghai Electric Research Institute, and 301 Institute of the Ministry of Aerospace. The main drafters of this standard are Huang Yuzhou, Wei Zhuyun, Shi Taisheng, Yu Yingkai, and Shang Qiumei.
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