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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

  • Place one probe at each end of the circuit or component you want to measure.

  • It doesn't matter which probe goes where; resistance is non-directional.

  • If your multimeter is manual ranging:

  • If your multimeter reads close to zero, the range is set too high for a good measurement. Turn the dial to a lower resistance range.

  • If you set the range too low, the multimeter simply reads 1 or OL, indicating that it is overloaded or out of range. This won't hurt the multimeter, but we need to set the dial to a higher range.

  • The other possibility is that the circuit or component you are measuring doesn't have continuity—that is, it has infinite resistance. A non continuous circuit will always read 1 or OL on a resistance test.

在两根表笔之间放入您想测量的电路或电子元件。

表笔放置的位置正反无所谓，因为电阻没有方向。

如果您的万用表是手动量程：

如果万用表的读数接近0，说明量程设置过高，无法进行良好的测量。将表盘转到较低的电阻量程。

如果量程设置得过低，万用表只会读出 1 或 OL，表明其已超负荷或超出量程。这不会损坏万用表，但我们需要将刻度盘调到更高的量程。

另一种可能是您正在测量的电路或元件不具有连通性，也就是说，它具有无限大的电阻。非连通电路在电阻测试中的读数总是 1 或 OL。

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