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如何使用万用表

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How To Use A Multimeter: crwdns2935265:00crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 How To Use A Multimeter: crwdns2935265:00crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

  • To complete your continuity test, place one probe at each end of the circuit or component you want to test.

  • As before, if your circuit is continuous, the screen displays a value of zero (or near zero), and the multimeter beeps.

  • If the screen displays 1 or OL (open loop), there's no continuity—that is, there's no path for electric current to flow from one probe to the other.

  • Continuity is non-directional, meaning it doesn't matter which probe goes where. But there are exceptions—for instance, if there's a diode in your circuit. A diode is like a one-way valve for electricity, meaning it will show continuity in one direction, but not in the other.

  • To check for this, reverse what the probes are touching and check for continuity. If the multimeter shows continuity, then it's possibly a diode.

要完成一次连通性测试，只要将两支表笔碰触需要测试的电路或者元器件两端即可

如之前提到的一般，如果您要测试的电路是连通的，屏幕会显示一个0的值（或者接近于0），并且万用表会发出“哔”的响声。

如果屏幕显示1或者OL（开路），那就表示这个电路不连通——这意味着电流无法从一端流至另一端

电路通断是无方向性的，这意味着哪个表笔在哪端都不重要。 但是也有例外，例如，如果电路中有一个二极管。 一个二极管就像一个单向阀一样，意味着它将在一端会显示通，而在另一个方向则是“没有”。

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