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非隔离通道示波器测试方法注意事项

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Post time 2015-7-24 14:45:00 | Show the author posts only Reply Awards |Descending |Read mode
非隔离通道示波器测试方法及注意事项
当示波器通过USB线连接到电脑上时,示波器和电脑就共享地参考,该基准点通常是通过电源线接地平面,示波器探头上的接地线就连接在这个地平面上的。
不要将探头的接地线连接到一个高的电位上。如果您像图1那样连接将损坏您的设备和电脑。如果您要测试一个浮动的电位,请您参考以下的方法。
1. 如果设备和待测电路是共地的,请将探头上的接地线连接到这个地上。(如图2)
2. 将连接设备的PC机或被测电路中的任何一方使用隔离电源,这样测试也将是安全的。
3. 使用仅电池供电的笔记本电脑连接示波器进行测试,这是方法2的一种特殊情况,因为电池供电的笔记本电脑和被测试电路是隔离的。
4. 如果示波器和待测电路是共地A的,但您要测试的电路是浮地的,这时您需要使用示波器的两个通道,分别将两个探头的接地线连接到共同的地上,两个探头分别连接到待测电路的两端,然后使用将两个探头的波形进行数学减运算,这样您将会得到您想要的结果。
Handling Precautions
The product will share one reference which istypically connected to earth ground through the power cord with your PC afteryou connect the product to your PC with USB cable. The probe ground lead is atground potential.
Do not connect the ground lead to anelevated voltage. If you connect the probe as Figer 1, it will break theproduct and your PC. If measuring the floating potential, we will recommend themeasurement as follows.
.
1.      If product and your circuitshare one ground, make sure that connect the ground lead of the probe to earthground only. (As Figure 2).
2.      Use isolated power supply foryour PC or your circuit.
3.      Use a notebook PC which usebattery power supply only.
4.      Use differential motion method usingCH1 and CH2. (Figuerr2)
  

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Post time 2018-12-3 07:42:58 | Show the author posts only
   请问,是不是可以这样理解:
  如果虚拟示波器接PC台式电脑,而被测电路使用电池供电或用电池升压产生的电源供电,即使被测电路是浮地的也是安全的?,
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