<div dir="ltr"><div>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 : <a href="https://www.jaycar.co.nz/cro-probe-cable/p/QC1902" target="_blank">https://www.jaycar.co.nz/cro-<wbr>probe-cable/p/QC1902</a>  Only $47.50 each :-(<br></div><div><br></div><div>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: <br></div><div><br></div><div><a href="http://www.syscompdesign.com/assets/images/appnotes/probes.pdf">http://www.syscompdesign.com/assets/images/appnotes/probes.pdf</a></div><div><br></div><div>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.<br></div><div><br></div>Richard Jones<br><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Aug 22, 2017 at 2:10 PM, Jasper Mackenzie <span dir="ltr"><<a href="mailto:jasper.mackenzie@gmail.com" target="_blank">jasper.mackenzie@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Great advice!<br></div><div>Thanks for the links<br></div>Can you say a bit more about the outputs/inputs?<br><br></div>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 $$<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 22 August 2017 at 14:06, Marshland Engineering <span dir="ltr"><<a href="mailto:marshland@marshland.co.nz" target="_blank">marshland@marshland.co.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The one I have is a DSO112A $46 2 MHz. The resistive screen is a bit finicky<br>
but very happy with it.<br>
<br>
Do buy proper leads separately and make sure you get a 1x and 10x probe. I<br>
made a mistake with the first one and after reading the small print found it<br>
was a 100x.   So now I can read to 5000 volts !!!!<br>
<br>
The normal 90deg lead that comes with it is impossible to remove without<br>
pliers.<br>
<br>
<a href="https://www.aliexpress.com/item/DSO-112A-TFT-Mini-Digital-Oscilloscope-Portable-Touch-Screen-USB-Oscilloscope-Interface-2MHz-5Msps/32743812656.html" rel="noreferrer" target="_blank">https://www.aliexpress.com/ite<wbr>m/DSO-112A-TFT-Mini-Digital-<wbr>Oscilloscope-Portable-Touch-<wbr>Screen-USB-Oscilloscope-Interf<wbr>ace-2MHz-5Msps/32743812656.<wbr>html</a><br>
<br>
<a href="https://www.aliexpress.com/item/O023-new-60MHz-Probe-x1-x10-for-Nano-DSO201-DSO203-Portable-Oscilloscope-FREE-SHIPPING/1681373767.html" rel="noreferrer" target="_blank">https://www.aliexpress.com/ite<wbr>m/O023-new-60MHz-Probe-x1-x10-<wbr>for-Nano-DSO201-DSO203-Portabl<wbr>e-Oscilloscope-FREE-SHIPPING/<wbr>1681373767.html</a><br>
<br>
<br>
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