* Question
| What is the problem with the probe line? |
* Answer
| 1) The public end is suspended.When testing the waveform of the circuit under test, you will often see the waveform being measured erratic.If the alligator clip on the common end of the oscilloscope probe is already clamped in the relevant position of the circuit under test, the measured waveform is erratic. In this case, it is necessary to consider whether the alligator clip on the common end of the probe is connected to the connection.On the surface, the crocodile clip on the common end of the oscilloscope probe is connected to the wire, but it may actually be disconnected.That is, the bendable portion near the welded portion where the wire is connected to the alligator clip.
Once the connection is broken during the bending process, the connection does not necessarily separate from the alligator clip due to the action of the alligator clip sheath. The illusion is that the connection is still connected to the alligator clip.At this time, you can use a multimeter to test whether it is connected.If the crocodile clip on the common end of the oscilloscope probe is well connected to the connection, the measured waveform is still erratic. In this case, it is necessary to consider whether the connection between the common end of the oscilloscope probe and the circuit under test is poorly contacted. The reason for this phenomenon is that the probe is at the common end.The alligator clip is not accurately clamped to the corresponding connection point of the circuit under test.Or the position where the alligator clip is clamped has a relatively large contact resistance, and the relevant position needs to be cleaned up. |
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