[chbot] DS0150

[Richard Jones]

To answer Jaspers question about measuring voltages > 50V using the DSO150
something like this 10:1 scope probe could do the job to measure up to 500V
without isolation : https://www.jaycar.co.nz/cro-probe-cable/p/QC1902  Only
$47.50 each :-(

You could make your own. Section 5 in this paper shows the idea, ensure
appropriate track gaps and be conservative about voltage rating of
components used:

http://www.syscompdesign.com/assets/images/appnotes/probes.pdf

With scope probes included maybe the Rigol and similar scopes are not so
expensive after all if you need to approach the limits of their performance.

Richard Jones

On Tue, Aug 22, 2017 at 2:10 PM, Jasper Mackenzie <
jasper.mackenzie at gmail.com> wrote:

> Great advice!
> Thanks for the links
> Can you say a bit more about the outputs/inputs?
>
> A lot of what I do is greater than 100V, can anyone suggest a cheap and
> cheerful (isolated?) HV interface. I remember having such things at
> Polytech many moons ago, apparently they were very $$
>
> On 22 August 2017 at 14:06, Marshland Engineering <
> marshland at marshland.co.nz> wrote:
>
>> The one I have is a DSO112A $46 2 MHz. The resistive screen is a bit
>> finicky
>> but very happy with it.
>>
>> Do buy proper leads separately and make sure you get a 1x and 10x probe. I
>> made a mistake with the first one and after reading the small print found
>> it
>> was a 100x.   So now I can read to 5000 volts !!!!
>>
>> The normal 90deg lead that comes with it is impossible to remove without
>> pliers.
>>
>> https://www.aliexpress.com/item/DSO-112A-TFT-Mini-Digital-
>> Oscilloscope-Portable-Touch-Screen-USB-Oscilloscope-Interf
>> ace-2MHz-5Msps/32743812656.html
>>
>> https://www.aliexpress.com/item/O023-new-60MHz-Probe-x1-x10-
>> for-Nano-DSO201-DSO203-Portable-Oscilloscope-FREE-SHIPPING/
>> 1681373767.html
>>
>>
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