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Can oscilloscope measure mains voltage?
You must be very careful when measuring voltages on the mains with any measurement instrument. Trying to do the measurement of mains voltage with oscilloscope is potentially more dangerous, because typically oscilloscopes are are grounded devices that have the ground side of the probe connected to the equipment case.
What can you read from a waveform shown on an oscilloscope?
How to read a waveform on an oscilloscope
- Amplitude (looking along the vertical axis)
- Time (looking along the horizontal axis)
- Waveform shape, and distortion of waveform shape.
- Waveform disturbances, particularly from outside sources.
How is an oscilloscope used to report voltage?
By informing the scope what the probes attenuation factor is allows the scope to accurately report that voltage to you the operator. Now on to your second question. You are correct about the voltage. The 230V is across the lines not from the lines to ground. The phase is split (L1=+180deg, L2=-180deg).
How is the phase split in an oscilloscope?
The phase is split (L1=+180deg, L2=-180deg). Half the voltage from each line relative to ground. Assuming your scope is properly grounded which also means the input connectors outer ring is also grounded (verify with a DMM). So what the input to the scope sees is the line voltage relative to ground or 115VRMS (162Vp-p).
What kind of input amplifier does an oscilloscope use?
The input amplifier/A/D & attenuator in the scope has a maximum input capability no matter what probe you are telling the scope you have. All that changes is how the scope reports the input voltages.
How does the probe multiplier on an oscilloscope work?
All that changes is how the scope reports the input voltages. Think of the probe as an additional attenuator ahead of the scopes internal attenuator. The probe multiplier reduces the input connector voltage by the factor on the probe. 10V on a 10X probe will generate 1V at the connector.