Probe and maximum voltage

[fonograph]

For each probe,there is maximum voltage specification.There is also voltage divider specification,1:10 or 1:100 and many others division ratios.

If there is device under test that is 1000 V and I have probe that is specified as 1:100 10V,does that mean I can use it?
If its 1:100 that means 1% of voltage,so for 1000V voltage source that will result in 10V going through probe and that is within spec so everything is going to be alright,or not?

[danadak]

Yes if the probe itself and its cable has the 1000V rating, with some margin.


Regards, Dana.

[fonograph]

Yes if the probe itself and its cable has the 1000V rating, with some margin.


Regards, Dana.

But the probe doesnt have 1000V rating,it have 10 V rating! And why should the cable be 1000V rated? If its 100:1 probe,only 10V should go through cable.

[Zero999]

Yes if the probe itself and its cable has the 1000V rating, with some margin.


Regards, Dana.

But the probe doesnt have 1000V rating,it have 10 V rating! And why should the cable be 1000V rated? If its 100:1 probe,only 10V should go through cable.

Your question is confusing.

What's the probe's rated input voltage? Is this a passive oscilloscope probe or is it active? 10V does sound low for a passive probe. If your probe is rated to only 10V, then of course you shouldn't use it for 1kV.

[fonograph]

Confusing? Its brutaly simple,let me try again,there is 1000000 V voltage source and and I have 1:1000000  probe rated for 1V maximum voltage,can I use it?

If the 1V maximum voltage rating is for the probe tip,then I cant use it.If the 1V maximum voltage rating is for voltage divider output then I can use it becose 1000000 V through 1:1000000 divider  is 1V.

My point is,does the 1:X probe spec matters for maximum input voltage? If I have 100V rated probes,and one is 1:2 and other  1:10,is the maximum input voltage same,or does thr 1:10 have 5x higher maximum input voltage than 1:2?

[Brumby]

.... there is 1000000 V voltage source and and I have 1:1000000  probe rated for 1V maximum voltage,can I use it?

No.  You would need a probe rated for 1000000V.

When it comes to ratings, forget the output voltage!

The rating for a probe will be the maximum input voltage.  Actual voltage.

The 10:1 or 100:1 or 1000000:1 division just gives you the arithmetic factor to calculate the output voltage you would get for a given input voltage.

[tggzzz]

For each probe,there is maximum voltage specification.

There is also a voltage-vs-frequency specification; note it carefully.

A probe rated at 300V at 50Hz may only be rated at 10V at 100MHz.