Electronics > Beginners
Digital Oscilloscope Maximum Input Voltage
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tautech:

--- Quote from: mike_mike on January 22, 2018, 10:52:45 am ---Thanks for the reply.
I asked the question from the first post on another forum (before asking the question here) and the people from that forum said that if I will set de probe to 1x and the oscilloscope to 2mV/div and connect the probe to 200V peak, the oscilloscope will be damaged. Is that true ?

--- End quote ---
Maybe.
It's not standard practice to use probes set to 1:1, instead 10:1 is most often used.
In the channel menu set the input to the attenuation to match the probe then the OSD values will be correct.

Like any measurement device you can bust it if it's not set correctly so don't go anywhere near HV until you know exactly what you are doing.
At ~50V you can't get into too much trouble but for starters even stay a little lower until you are confident in usage. RTFM from front to back, 2 or 3 times, do simple tests to understand usage and become familiar with the controls.

As much as I hate it, Auto set is useful for scope newbies like you.
mike_mike:
I read a part of the manual and I searched in the manual for some key words, but there is not mentioned the maximum voltage for the 2mV/div input.
If I will use the scope at a maximum voltage of 100V peak with the 1x probe and 2mV/div should be ok ? For example I am thinking that I will make a mistake and put the probe to 200V peak, with the 1x probe and 2mV/div. The scope will be damaged ?
tautech:

--- Quote from: mike_mike on January 22, 2018, 11:13:22 am ---I read a part of the manual and I searched in the manual for some key words, but there is not mentioned the maximum voltage for the 2mV/div input.
If I will use the scope at a maximum voltage of 100V peak with the 1x probe should be ok ?

--- End quote ---
For what good reason ?
Why even think about stressing the inputs of a scope with HV and 1:1 probes ?  :scared:
mike_mike:
I am thinking that I will make a mistake..
For example I have a linear power supply and I want to measure ripple on 2mV/div with 1x probe and AC coupling, and the output of the power supply is 30Vdc.
tautech:

--- Quote from: mike_mike on January 22, 2018, 11:17:34 am ---I am thinking that I will make a mistake..
For example I have a linear power supply and I want to measure ripple on 2mV/div with 1x probe and AC coupling, and the output of the power supply is 30Vdc.

--- End quote ---
Then how you approach the measurement technique will minimize the chance of a mistake.

Who said you must use 2mV/div ?
Who said you must use 1:1 probe ?

Engage some little thought. Check first at a higher V/div setting then increase the sensitivity searching for the ripple. Never jump into a measurement at high sensitivity settings, never !!

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