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IK protection level collision test requirements:
1. Atmospheric conditions during the test Unless otherwise specified in the relevant product standards, the test should be carried out under the standard atmospheric pressure described in GI3/T 2421-1999.
2. Temperature range: 150C-350C; air pressure: 86 kPa-106 kPa (860 mbar-1 060 mbar). When the altitude of the test site is higher than 2 000 m, the manufacturer of the IP protection test tool should adjust to the necessary drop height to obtain the specified collision energy.
3. The enclosure under test Unless otherwise specified in the relevant product standards, all enclosures under test should be clean, brand new and complete enclosures, and all components should be installed in place.

Know the waterproof grade JIS (IPX) of electronic products
0 No protection
1 Anti-dripping type I, water droplets falling vertically have no harmful effects
2 Anti-drip type Ⅱ The water droplets falling within 15" of the vertical direction have no harmful effects
3 Rainproof type There is no harmful effect of rain within a range of 60 degrees from the vertical direction
4 Splash-proof type, no harmful effects from water splashing in any direction
5 Anti-spray type Directly exposed to water spray in any direction without harmful effects
6 Water resistant type Directly sprayed by water in any direction will not enter the interior
7 Anti-immersion type It will not enter the interior even if it is immersed in water under specified conditions
8 In water type, it can be used even if it is immersed in a certain pressure of water for a long time
9 Moisture-proof type It can still be used when the relative humidity is more than 90% humidity.
The manufacturer of the IP protection grade test tool states that the two digits behind the IP indicate the protection strength of the equipment shell against solid foreign objects and water intrusion. The first digit indicates the level of dustproof and foreign object intrusion of the electrical equipment, and the second digit indicates The degree of airtightness of the equipment against moisture and water intrusion. The larger the number, the higher the degree of protection. When the level of protection requirements is higher than the level indicated by the above-mentioned characteristic numbers, the extended range will be expressed by adding additional letters after the first 2 digits, which also need to meet the respective requirements of these additional letters.