MIL-STD-810G ??
810G 是這樣說低 "this revision recognizes that the environmental design and test tailoring process has expanded to involve a wide range of managerial and technical interests. Accordingly, this revision orients environmental design and test direction toward three basic types of users who have distinctly different, although closely associated, interests: program managers who, among other responsibilities, ensure proposed concepts and systems are valid and functional in intended operational environments; environmental engineering specialists (EES), who enter the acquisition process early to assist combat and materiel developer tailoring efforts by preparing life cycle environmental profiles and drafting tailored design criteria and test programs; and the design, test, and evaluation community, whose analysts, engineers, and facility operators use tailored designs and tests to meet user needs."
八百多頁, 實在無法一一看完, 但似乎他只對環境以及實驗室測試做規範,
換句話說, 通過這個規範的應該是 環境 或 實驗室, 而非產品!
當然, 如果我有錯, 還請糾正我!
包裝盒背面 有寫著 Military Class 2 下 有三種元件, 但基本上就是電容跟 CHOKE
而軍規中 電子元件測試, 電容 引用的測試規範大概都會是這一份
MIL-STD-202
TEST METHOD STANDARD ELECTRONIC AND ELECTRICAL COMPONENT PARTS
可是.... 裡面並沒有 CLASS 2 啊!
裡面的測試 概分為
1. Environmental tests (100 class)
100 級 做下面這些測試
Salt atmosphere (corrosion) (formerly called salt spray)
Superseded by Method 107 (see note on Method 102)
Humidity (steady state)
Immersion
Barometric pressure (reduced)
Moisture resistance
Thermal shock
Life (at elevated ambient temperature)
Explosion
Sand and dust
Flammability (external flame)
Seal
2. Physical characteristics tests (200 class)
200 級 做下面這些測試
Vibration
Superseded by Method 213 (see note on Method 202)
Random drop
Vibration, high frequency
Superseded by Method 213 (see note on Method 205)
Life (rotational)
High-impact shock
Solderability
Radiographic inspection
Resistance to soldering heat
Terminal strength
Acceleration
Shock (specified pulse)
Random vibration
Resistance to solvents
Superseded by Method 210 (see note on Method 216)
Particle impact noise detection (PIND)
3. Electrical characteristics tests (300 class)
300 級 做下面這些測試
Dielectric withstanding voltage
Insulation resistance
DC resistance
Resistance temperature characteristic
Capacitance
Quality factor (Q)
Contact resistance
Current-noise test for fixed resistors
Voltage coefficient of resistance determination procedure
Contact-chatter monitoring
Life, low level switching
Intermediate current switching
當然每種元件不同該挑來做的測試也會不同!
只是,真的不明白 MSI 的軍規是.......
再來提一點,軍規電容大概都有一個共有特性,就是操作溫度會在 -55度~125度 之間!
至少我見過的都是...