防塵防水試驗
對于可便攜式、戶外用以及汽車電子均有防塵防水測試要求，在國際上不論是IEC、MIL或ETS以及SAE均有制訂相對應的測試要求。
Dust/Rain Test
For portable, outdoor and automotive electronics, there are dust and water proof test requirements, and corresponding test requirements have been formulated
IEC/EN60529或GB/T 4208防塵分為7個等級
等級0: 完全無防塵保護
等級 1: 可保護避免直徑大于50㎜之異物掉入設備內(IP1X)
等級 2: 可保護避免直徑大于12.5㎜之異物掉入設備內(IP2X)
等級 3: 可保護避免直徑大于2.5㎜之異物掉入設備內(IP3X)
等級 4: 可保護避免直徑大于1.00㎜之異物掉入設備內(IP4X)
等級 5: 不能完全防止塵埃進入，但進入的灰塵量不得影響設備的正常運行，不得影響安全(IP5X)
等級 6: 完全防塵,塵密狀態(IP6X)
IEC/EN60529 or GB/T 4208 Dust prevention is divided into 7 levels
Level 0: completely without dust protection
Level 1: It can protect and prevent foreign matters with a diameter greater than 50 ㎜ from falling into the equipment (IP1X)
Level 2: It can protect and prevent foreign matters with a diameter greater than 12.5 ㎜ from falling into the equipment (IP2X)
Level 3: It can protect and prevent foreign matters with a diameter greater than 2.5 ㎜ from falling into the equipment (IP3X)
Level 4: It can protect and prevent foreign matters with a diameter greater than 1.00 ㎜ from falling into the equipment (IP4X)
Level 5: The dust can not be completely prevented from entering, but the amount of dust entering shall not affect the normal operation of the equipment and safety (IP5X)
Level 6: completely dustproof, dust tight (IP6X)
相對濕度：25%~75%RH
大氣壓力：86~106kpa
溫度范圍：常溫~70 ℃
滑石粉用量：2kg~4kg/m3
內部尺寸：1000×1000×1000mm
Relative humidity: 25%~75% RH
Atmospheric pressure: 86~106kpa
Temperature range: normal temperature~70 ℃
Amount of talcum powder: 2kg~4kg/m3
Internal size: 1000 × 1000× 1000mm
IEC/EN60529或GB/T 4208防水分為9個等級
等級 0: 完全防水無保護
等級 1: 垂直方向滴水應無有害影響(IPX1)
等級 2: 外殼的各垂直面在15°范圍內傾斜時，垂直滴水應無有害影響(IPX2)
等級 3: 各垂直面60°范圍內淋水，無有害影響(IPX3)
等級 4: 向外殼各方向濺水無有害影響(IPX4)
等級 5: 向外殼各個方向噴水無有害影響(IPX5)
等級 6: 向外殼各個方向強烈噴水無有害影響(IPX6)
等級 7: 浸入規定壓力的水中經規定時間后外殼進水量不致達到有害程度(IPX7)
等級 8: 按生產廠和用戶雙方同意的條件（應比等級 7嚴酷）持續潛水后外殼進水量不致達有害程度(IPX8)
IEC/EN60529 or GB/T 4208 waterproof is divided into 9 grades
Level 0: completely waterproof and unprotected
Level 1: Vertical dripping shall have no harmful effect (IPX1)
Level 2: When each vertical plane of the enclosure is inclined within 15 °, vertical dripping shall have no harmful effect (IPX2)
Level 3: No harmful effect within 60 ° of each vertical plane (IPX3)
Level 4: No harmful effect when splashing water in all directions of the housing (IPX4)
Level 5: No harmful effect when spraying water in all directions of the enclosure (IPX5)
Level 6: No harmful effects caused by strong water spraying in all directions of the enclosure (IPX6)
Level 7: After immersion in the water with specified pressure for a specified time, the water inflow into the shell will not reach a harmful level (IPX7)
Level 8: According to the conditions agreed by the manufacturer and the user (which should be more severe than Grade 7), the water inflow of the enclosure will not reach harmful level after continuous diving (IPX8)
