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In Alibaba and other B2B online shopping platforms, there are a variety of industrial keyboards. And in a variety of shops, as low as dozens of yuan, as high as thousands of Yuan keyboard said with waterproof function. The increase of waterproof keyboard is due to the rapid development of industrialized society. Many projects use computers for a long time and the office environment is complex. So it's easy to have rain or other liquid intrusion keyboard phenomenon. In particular, outdoor advertising machine reinforcement machine and other outdoor environment is more complex, it needs industrial waterproof keyboard.

Words such as "IP68 waterproof", "IP65 waterproof" and "IP54 anti splashing" have appeared on the market. I believe many purchasing managers feel very puzzled about how to waterproof the waterproof keyboard? In order to solve the doubts in the minds of the purchasing army, we will focus on how the waterproof test process is, so that we can distinguish and understand the key points to pay attention to when purchasing waterproof keyboards.

In general, we ask the other party to give the waterproof test items and methods, and then ask for the waterproof certificate. Specific such certificate can judge the other side has such strength. (as for each keyboard is waterproof and tight, this depends on the operation of the other production line, here omit 300 words). At present, the steps of testing waterproof keyboard in various institutions are as follows:

When the keyboard is powered on, the basic waterproof test is divided into four items, namely "watering the primary key area", "soaking the primary key area", "watering the number key" and "soaking the number key". Through the keyboard of the above four items, gradually enter the limit test.

First of all, pour water of the same quality as the keyboard on the surface of the keyboard, wipe it off after three minutes, connect the device to test, and if the key value display is no different from the original, it can be judged that the waterproof test of the keyboard is successful, with the grade of IP54.

Secondly, soak the number keys for 20 minutes and 1 hour respectively, and finally insert the computer equipment into the repeated operation to see which keyboards can survive. Because the keyboard circuit board is placed above the number key area, is near the indicator light. If the sealing around the circuit board is not good enough, it will lead to water flowing in and form a short circuit condition. Therefore, after the above routine test, if the key value display is no different from the original, it can be judged that the keyboard waterproof test is successful, and the level is IP65.

Finally, as a military enterprise needs higher requirements, the corresponding test difficulty index increases. According to physics, P = ρ GH, where p is the pressure of the liquid, ρ is the density of the liquid, G is the gravitational constant (the value is 9.8n/kg), and H is the depth. According to the density of water is 1000kg / m3, the depth of keyboard immersion is about 0.2m, the pressure P is 1960pa. Therefore, the water-proof test of the keyboard can be judged to be successful by taking one hour as the standard and no difference between the key value display and the original one, and the level is IP68.

The above is that our platform needs professional equipment to provide test, so we are reminded not to imitate, because if the keyboard waterproof fails, the circuit board will be short circuited, the instantaneous resistance value will be close to 0, and the current will be infinite (I = u / R), causing the keyboard circuit board to burn out. If the motherboard USB circuit protection is not good, it will cause the motherboard chip damage.

Therefore, the keyboard that can pass the above strict test has higher requirements for the strength of the manufacturer. However, there are few domestic keyboard manufacturers in China, mainly distributed in Shenzhen, such as kaimingyang, Xuzi, Zhengtong and so on. Well, this is the end of this discussion. I hope the above paragraphs can help you solve your problems. Thank you.

PS: Waterproof level, waterproof protection function level, including building waterproof grade, instrument waterproof and dustproof grade. It is mainly determined according to the nature, importance, functional requirements, structural characteristics and service life of waterproof layer. In the division of waterproof grade, the following situations are comprehensively considered: ① leakage will cause great loss until personal injury; ② leakage will cause significant economic loss; ③ leakage will cause general economic loss; ④ leakage will affect the appearance.