Electronics > Beginners
Digital Oscilloscope Maximum Input Voltage
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mike_mike:
 I watched only a part from that video a few weeks ago.
I am still waiting for an answer for the question that I asked in my previous post.
tautech:

--- Quote from: mike_mike on February 13, 2018, 09:26:44 am --- I watched only a part from that video a few weeks ago.
I am still waiting for an answer for the question that I asked in my previous post.

--- End quote ---
DON'T probe mains with ordinary probes. Period.

The energy levels are too high to risk it. It's your choice but I tend to restrict myself to ~150V with 10x probes and anything higher brings out a 100x or 1000x probe.
With a modern DSO with good sensitivity such probe attenuation is no handicap.
mike_mike:
I think I was not sufficiently clear when I wrote the first question.

My question is if I can power the oscilloscope from the mains (230Vac here in Europe) if the mains voltage is 247-250Vac, while in the manual is mentioned that the scope can be powered up to 240Vac ?
The value of the mains voltage (247Vac) was measured with an Uni-t UT52 digital multimeter.
mike_mike:
When I was calibrating the probe, I saw that the calibration signal is having a little ”movement” on the screen. For example, I saw that the vertical lines of the signal are making some movement to the left and to the right as you can see from this video: https://www.youtube.com/watch?v=IOxCg90y3JI&feature=youtu.be

The settings on the scope are: 1V/div, 250uS/div

Is that movement of the vertical lines normal ?
tautech:

--- Quote from: mike_mike on February 13, 2018, 01:34:51 pm ---I think I was not sufficiently clear when I wrote the first question.

My question is if I can power the oscilloscope from the mains (230Vac here in Europe) if the mains voltage is 247-250Vac, while in the manual is mentioned that the scope can be powered up to 240Vac ?
The value of the mains voltage (247Vac) was measured with an Uni-t UT52 digital multimeter.

--- End quote ---
Yes, it's safe to use it connected to your mains. All mains voltages worldwide have some variation and instrument design allows for it.

--- Quote from: mike_mike on February 13, 2018, 04:37:43 pm ---When I was calibrating the probe, I saw that the calibration signal is having a little ”movement” on the screen. For example, I saw that the vertical lines of the signal are making some movement to the left and to the right as you can see from this video: https://www.youtube.com/watch?v=IOxCg90y3JI&feature=youtu.be

The settings on the scope are: 1V/div, 250uS/div

Is that movement of the vertical lines normal ?

--- End quote ---
Normal.
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