This test shall be carried out in accordance with DIN EN 60068-2-60 Method 4 with the following parameters:
Operating mode of DUT | Operating mode I.b | |
Temperature | T(RT) | |
Humidity | 75% | |
Corrosive gas concentration | So2 | 0.2ppm |
H2S | 0.01ppm | |
No2 | 0.2ppm | |
Cl2 | 0.01ppm | |
Test duration | 21 days | |
Number of DUTs | 6 |
Commercial use | 0~70 °C | |
0~40 °C | General electrical appliances in daily life, such as users of computers and photocopiers | |
Industrial use | -25~125 °C | |
-20~71 °C | Power used by industrial products, such as power in SMD machines and CNC machines | |
Military use | -40~125 °C | |
-40~125 °C | Military use, such as power used in missiles, battleships, and tanks. |
Second characteristic number | Degree of protection | |
Brief description | Definition | |
0 | Non-protected | - |
1 | Protected against vertically falling water drops | Vertically falling drops shall have no harmful effects. |
2 | Protected against vertically falling water drops when enclosure tilted up to 15° | Vertically falling drops shall have no harmful effects when enclosure is tilted at any angle up to 15°on either side of vertical. |
3 | Protected against spraying water | Water spray at an angle up to 60°on either side of the vertically shall have no harmful effects. |
4 | Protected against splashing water | Water splashed against the enclosure from any direction shall have no harmful effects. |
5 | Protected against water jets | Water protected in jets against the enclosure from any direction shall have no harmful effects. |
6 | Protected against powerful water jets | Water protected in powerful jets against the enclosure from any direction shall have no harmful effects. |
7 | Protected against the effects of temporary immersion in water | Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is temporarily immersed in water under standardized conditions of pressure and time. |
8 | Protected against the effects of continuous immersion in water | Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is continuously immersed in water under conditions which shall be agreed between manufacturer and user but which are more severe than for numeral 7. |
9 | Protected against high temperature and pressure water jets | Water protected at high pressure and temperature against the enclosure from any direction shall have no harmful effects. |
Class | Relative Humidity, | Temperature, ℃ | Concentration, ppb | |||
% | Cl2 | NO2 | H2S | SO2 | ||
I | Discontinued as a test procedure | |||||
II | Superseded by class IIA | |||||
IIA | 70±2 | 30±1 | 10±3 | 200±50 | 10±5 | 100±20 |
III | Superseded by class IIIA | |||||
IIIA | 70±2 | 30±1 | 20±5 | 200±50 | 100±20 | 200±50 |
IV | 75±2 | 40±2 | 30±5 | 200±50 | 200±20 | N/A |
Test parameters | Method 1 | Method 2 | Method 3 | Method 4 |
H2S(10-9vol/vol)a | 100±20 | 10±5 | 100±20 | 10±5 |
NO2(10-9vol/vol)b | -- | 200±50 | 200±50 | 200±20 |
Cl2(10-9vol/vol)c | - | 10±5 | 20±5 | 10±5 |
SO2(10-9vol/vol)d | 500±100 | - | - | 200±20 |
Temperature(℃) | 25±1 | 30±1 | 30±1 | 25±1 |
Relative humidity(%) | 75±3 | 70±3 | 75±3 | 75±3 |
Number of volume changes per hour of test gas(10) | 3~10 | 3~10 | 3~10 | 3~10 |
Weight gain of copper sheet sample obtained according to Appendix A(mg/(dm2·d)) | 1.0~2.0 | 0.3~1.0 | 1.2~2.2 | 1.2~2.4 |
Note: Due to the different corrosivity of test methods 1 to 4, the order of numbering and the corresponding corrosion weight of copper pieces do not reflect its severity level | ||||
a H2S: 1μm/m3=0.71mm3/m3 | ||||
b NO2: 1μm/m3=0.53mm3/m3(10-9vol/vol)b=UNIT(μm/m3) | ||||
c Cl2: 1μm/m3=0.34mm3/m3 | ||||
d SO2: 1μm/m3=0.38mm3/m3 |
Heat chamber:ambient~+150℃, the general test requirement is +70℃
Cool chamber:0℃ salt water
The EV battery performs cold and heat shocks between the hot room and cold room.
This test shall be carried out in accordance with ISO 20653 with the following parameters:
Operating mode of DUT | For electric/electronic components: Operating mode II.a |
For mechartronic components (e.g for components with fan): | |
Intermitting between operating mode II.c and operating mode II.a | |
Degree of protection to be achieved | As specified in the component Requirement Specification |
Numbers of DUTs | 6 |
Salt Spray Test
To determine whether rainwater can enter the module or assembly under field conditions, and if the entered water can cause a ground fault or a safety hazard.
[Device]
The apparatus for salt spray testing is to consists of a chamber with inside measurement of 48 in by 30 in by 36 in (1.22 m by 0.76 m by 0.91 m) or larger if required;
A salt solution reservoir; a supply of conditioned compressed air;
One dispersion tower constructed in accordance with ASTM designation B117-97, for producting a salt spray;
Specimen supports;
Provision for heating chamber;
And necessary means of control.
[Test Procedure]
A) The salt solution is to consist of 5% by weight of common salt (sodium chloride) in distilled water. The pH value of the collected solution is to be between 6.5 and 7.2, and have a specific gravity between 1.026 and 1.040 at 95°F (35°C). The temperature of the chamber is to be maintained within the range of 92°F to 97°F (35°C-36°C) throughout the test.
B) The test sample is to be supported on plastics racks at an angle of 15 degrees from the vertical.
C) Drops of solution which accumulate on the ceiling or cover of the chamber are to be diverted from dripping on the specimen. Drops of solution which fall from the specimen are not to be recirculated, but are to be removed by a drain located in the bottom of the apparatus.
D) Reference specimens, 4 in by 12 in (102 mm by 305 mm) commercial zinc coated sheet steel are to be used for comparison. The selected specimens are to be represent of the minimum acceptable amount of zinc coating under requirements for G90 or G60 coating designation (as appliable, see accessibility of Uninsulated Parts, Section 15) as determined in accordance with standard test method for weight of coating on zinc-coated iron or steel articles, ASTM A90-81(1991) such zinc coatings are considered as providing acceptable protection against corrosion.
E) The zinc coated reference specimen are to be cleaned with soap and water, rinsed with ethyl alcohol and ethyl ether, dried, blade, and the cut edges protected with pain, wax or other effective medium before being placed in the salt spray chamber.
F) Both the reference specimen and samples under test are to be scribed with a single groove approximately 6 in (152m) long, to expose the underlying steel.
G) The test is to continue until the coating on the test sample or reference samples are broken down and corrosion products are formed on the underlying steel.
Moist Carbon Dioxide/Sulphur Dioxide Corrosion Test
[Device]
The chamber size shall be 48 in by 30 in by 36 in (1.22 m by 0.76 m by 0.91 m) or if a larger chamber is required. To maintain a temperature of 95±3F (35±2 "C), a water jacket and thermostatic control heater are required.
[Test Procedure]
A) The specimens are to be supported on plastic racks at an angle of 15 degrees from the vertical.
B) Reference specimens, 4 in by 12 in (102mm by 305mm) commercial zinc coated sheet steel are to be used for comparison.
C) The zinc coated specimens are to be cleaned with soap and water, rinsed with ethly alcohol and ethyl ether, dried, and protected with paint, wax or other effective media before being placed in the chamber.
D) Both the reference specimen and sections of the module being tested are to be scribe with a single groove approximately 6 in (152 mm) long to expose the underlying steel.
E) The test is to continue until the coating on the module or reference specimen is broken and corrosion products are formed on the underlying steel.
Operating mode of DUT | Operating mode I.a |
Lower temperature | T(min) |
Upper temperature | T(max) |
Holding time at upper/lower temperature | 15min following attainment of complete thermal equilibrium |
Transition time | ≤10s |
Number of cycles | 300 |
Number of DUTs | 6 electronice assemblises |
[Test Purpose]
To determine whether rainwater can enter the module or assembly under field conditions, and if the entered water can cause a ground fault or a safety hazard.
[Test Procedure]
A) Fixture installation of modules and components can achieve the following four directions:
The angle between the front angle and the horizontal angle is 45 degrees;
At the stop position;
Within normal range which allows tracking Angle;
Reverse position (using the appropriate operating mode);
Note: for some design, these directions may be superfluous.
A) Complete the wiring connection according to the specified connection method and installation instructions. When there are multiple specified wiring modes, should choose at least one code which can restrict the water into wiring space.
C) The fixtures used for the rain test need to meet ANSI/UL 1703:2002 standard requirements.
D) Modules or components were sprayed water more than 1 hour, spray in every four directions, spray for no less than 15 minutes, need to detect modules or components for testing whether the conductive part with water or water infiltration after one hour of spraying, If water exists in the above areas, you need to take corresponding measures, such as increasing drain, etc., maintain water depth does not reach the conductive parts.
E) the Insulation test (as shown in figure 13) should start after 1-2 hours of spraying, don't manual stop spraying, If found that insulation resistance value is lower than the specified value, and the reason is moisture inside the module, then Wait for the module to dry and re-insulate.
This test shall be carried out in accordance with ISO 20653 with the following parameters:
Operating mode of DUT | Intermitting between 1 min operating mode II.a and 1min operating mode II.c |
Required degree of protection | As specified in the component requirement specification |