信赖性试验 Reliability Test | |
经过以下所有试验在20℃的条件下放置3小时后,麦克风的灵敏度与试验前比较变化在3DB以内 After any following tests, the sensitivity of the microphone to be within±3DB of initial sensitivity after 3hours of conditioning at 20℃ | |
5-1振动试验 Vibration | 周波数1/Frequency1:10Hz～55Hz 振幅/Amplitude:1.52mm 变化/Change of Frequency:1 octave/min 3方向,各2小时/hours in each of 3 axes | |
5-2高温试验 Dry Heat | +70℃ for 72 hours | |
5-3低温试验 Dry Cold | -20℃ for 72 hours | |
5-4高温高湿试验 Damp Heat | 90%～95%RH,+40℃ for 240 hours | |
5-5温度循环试验 Temperature cycles | -20℃ 25℃ 70℃ -20℃ (2h) (1h) (2h) (1h) (2h) (2h)ⅹ10 cycles | |
5-6跌落试验 Packing drop test | Height:1m 顺序:三个面各跌5次 Procedure:5 times from each of 3 axises | |
备注Note | |
6-1动作温度范围 Operation Temperature | -40℃～75℃ | |
6-2保存温度范围 Storage Temperature | -40℃～75℃ | |
焊接条件 Soldering Condition | |
7-1焊接使用13W～20W的烙铁。 The soldering copper of a type of 13W～20W shall be applied | |
7-2电烙铁表面温度低于320℃ The temperature of the working surface of the soldering copper shall be below 320℃ | |
7-3焊接时把麦克风嵌入散热能力强的金属块内。 ECM shall be soldered fixed on the metal block(heat sink)which has the higher radiation effects said heat sink Shall contact with of ECM . | |
7-4焊接时间控制在1～2秒内。 time for each terminal shall be 1～2 sec. | |
7-5焊接后不能出现针孔。 The pinhole after soldering shall be avoided. | |
7-6静电容易破坏麦克风必须采取措施避免（电烙铁接地，戴静电环等。） ECM may easily destroyed by the static electricity and the countermeasure for eliminating the staticelectricity(the ground for soldering copper, for worktable and for human body)shall be executed. |
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