Differential probe's Technical Specifications questions

[2nOrderEDO]

Hello people,

Now in my work we are developing Switch Mode Power Supplys and we need to measure voltages on the primary side of our power supply. To achieve that we want to buy a differential probe so we can measure without using an isolation transformer (which is dangerous).

In our power supply the voltage on the drain of our MOSFET can go from 450VDC to 800VDC and I'm a little bit confused because the technical specs on the datasheets of the differentials probes. We have a RIGOL DS2102 oscilloscope and we are thinking on buying the RP1050D differential probe. Below are the electrical characteristics (picture attached)

Can someone explain to my the specs? I  know what maximun differential voltage is, and the single ended one with respect to ground. But I don't know what they mean with DC+AC peak to peak or when they say:

"Maximum differential voltage: 7000V (DC+AC peak-peak vale) or 450Vrms" (from http://beyondmeasure.rigoltech.com/acton/attachment/1579/f-01c6/1/-/-/-/-/file.pdf)

¡To me 7000VDC is not 450Vrms, is 7000Vrms!

If someone can help me understand the specs It will we nice, or if Dave does a VBlog on differential probes will we wonderful

thank you in advance. ^^

PD: Sorry about my English and about spellings mistakes.

15/oct/2013 Rigol's answer:



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I'm attaching the picture to this post and the new datasheet too.

Thanks for you answer Dave! (Dont confuse with Dave Jones)

[Dave]

"Maximum differential voltage: 7000V (DC+AC peak-peak vale) or 450Vrms" (from http://beyondmeasure.rigoltech.com/acton/attachment/1579/f-01c6/1/-/-/-/-/file.pdf)

I have a feeling that one zero slipped away. 4500Vrms would make more sense there.

Why don't you contact the manufacturer and ask them about it? They would surely be the most reliable source for that information.

[2nOrderEDO]

I'm sending an Email to Rigol. I will post what they say. Thanks for the answer.

[2nOrderEDO]

Rigol dind't answer yet. That is what makes me think on buying a Agilent Oscilloscope instead of a Rigol one.

[2nOrderEDO]

I received the answer and I'm modifiying my first post to accomodate the explanation.