Products > Test Equipment
DSO: How to read max. voltage specs?
Aldo22:
--- Quote from: Someone on August 30, 2024, 11:06:50 pm ---
--- Quote from: Aldo22 on August 30, 2024, 12:00:38 pm ---There is nothing about this in the manual, only in the information quoted above.
--- End quote ---
If there is nothing in the manual then the manufacturer has failed to provide the minimum information required (by various standards). Why use something if it is of questionable performance/safety/compatibility ?
If they don't state it, then you can't assume anything.
--- End quote ---
Hi someone
There is something about it in the manual and I have already shown that:
I just don't quite understand what it means.
That's what this thread is about: "DSO: How to read max. voltage specs?".
The sticking point is that the manual says: 300Vrms (10x).
The question was: What does (10x) mean in this case?
The print on the front panel (overvoltage category) does not say 10x.
But it's actually not safety-relevant for me, as I have nothing to do with mains.
Even if it means that it can only handle 30Vrms (1x), that's still 80Vpp (1x) or 800Vpp (10x). That's enough for me.
That would be no reason not to use the oscilloscope.
The only question is whether I would destroy the oscilloscope with e.g. 60VDC (1x).
But I would survive that and should that happen, I would buy a new scope.
So again, I just want to know how to interpret the specs and I've already learned a lot in this thread.
I'm not interested in looking at mains with this scope. I wouldn't know what for.
Fungus:
The maximum voltage the hardware can handle without damage is "CAT II 300V"
It's THAT simple. It really is.
That's what CAT ratings are for, it's why they print them on the front of devices.
Someone:
--- Quote from: Aldo22 on August 31, 2024, 09:20:50 am ---Even if it means that it can only handle 30Vrms (1x), that's still 80Vpp (1x) or 800Vpp (10x).
--- End quote ---
30Vrms != 80Vpp
You are adding assumptions and extrapolating from their limited information, which may or may not apply.
--- Quote from: Aldo22 on August 31, 2024, 09:20:50 am ---The only question is whether I would destroy the oscilloscope with e.g. 60VDC (1x).
--- End quote ---
There is not enough information given so far. Why not ask your distributor or the manufacturer ? They are responsible for your support of the product and any shortcomings in the documentation.
Aldo22:
--- Quote from: Fungus on August 31, 2024, 10:52:48 am ---The maximum voltage the hardware can handle without damage is "CAT II 300V"
It's THAT simple. It really is.
That's what CAT ratings are for, it's why they print them on the front of devices.
--- End quote ---
Great! I hope so and I believe that too.
I just still don't know what 300Vrms (10x) means there.
Does it perhaps just mean that it can't display/measure 300Vrms in 1x?
Well, maybe I'll never know. It's not that important for me.
Thanks!
minhtri0405:
--- Quote from: Aldo22 on August 31, 2024, 09:20:50 am ---
--- Quote from: Someone on August 30, 2024, 11:06:50 pm ---
--- Quote from: Aldo22 on August 30, 2024, 12:00:38 pm ---There is nothing about this in the manual, only in the information quoted above.
--- End quote ---
If there is nothing in the manual then the manufacturer has failed to provide the minimum information required (by various standards). Why use something if it is of questionable performance/safety/compatibility ?
If they don't state it, then you can't assume anything.
--- End quote ---
Hi someone
There is something about it in the manual and I have already shown that:
I just don't quite understand what it means.
That's what this thread is about: "DSO: How to read max. voltage specs?".
The sticking point is that the manual says: 300Vrms (10x).
The question was: What does (10x) mean in this case?
The print on the front panel (overvoltage category) does not say 10x.
But it's actually not safety-relevant for me, as I have nothing to do with mains.
Even if it means that it can only handle 30Vrms (1x), that's still 80Vpp (1x) or 800Vpp (10x). That's enough for me.
That would be no reason not to use the oscilloscope.
The only question is whether I would destroy the oscilloscope with e.g. 60VDC (1x).
But I would survive that and should that happen, I would buy a new scope.
So again, I just want to know how to interpret the specs and I've already learned a lot in this thread.
I'm not interested in looking at mains with this scope. I wouldn't know what for.
--- End quote ---
I have a pretty old OSC SDS1072CNL, but I just recently had a chance to use it. And like you I wondered if the 400Vpp written in the OSC specs is the maximum voltage applied to the OSC's BNC connector???. After reading many posts on eevblog and other sites I asked siglent and they said "yes", I illustrated with pictures to make sure I didn't misunderstand. Siglent confirmed that 400Vpp is the voltage at the BNC connector. Hope they don't exaggerate too much. Image attachments
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