I bought a PCSGU-250 and I like it very much, but I did not notice the maximum voltage peak to peak input of 30Vpp.
Now I have to measure a 36 V AC , 60 Hz, input , i.e. 50 Vpp .
I had a look at the manuals of your other oscis and a look at the circuitry of a probe,
( scope-probe-schematic.blogspot.de/ )
it looks that the attenuation circuitry is basically a voltage divider by resistors.
So I wonder if I could measure it with attenuation factor x10.
Is this Ok. or do I damage it now.
If I cannot use this method, its worthless anyway.
To measure higher voltages you have to change the slider in the probe to position x10. When done, the probe is set to attenuate the signal by 1:10.
In the oscilloscope interface click the button x10 (next to the text ‘Probe’) to get correct readings.
Using x10 probe setting, the maximum peak-to-peak signal you can display is 240Vpp on the PCSGU250 screen.
When using the probe’s x10 setting, you have to adjust the probe compensation to get good frequency response.
Please see “Compensation Adjustment”: velleman.eu/downloads/1/probe150gbnlfr.pdf
I have the same oscilloscope. It clearly says that even at the 10x attenuation setting the max voltage at the probe tip must not exceed 30V. Is is this untrue? I would very much like to be able to measure signals that are offset ~50V from ground but have small pp variations (~1.5v).
I’ve avoided this so far given the warnings. Can I do this?
