Hacking the Rigol DHO800/900 Scope

[scroeffie]

https://www.eleshop.nl/owon-oscilloscope-probes-2kv.html

[RogerG]

I wouldn't trust a probe in 2kV range, where the ground cable is isolated just with a thin layer of shrink tubing, as seen on the picture in eleshop.

For mains I use a properly isolated Stäubli Isoprobe III with fixed 1:10, which has CAT III 1000 V + CAT IV 600 V rating. They have a separate ground cable with clip, also with its own CAT rating. These probes come in a wide variety, also with higher voltages and 1:100. But this safety has its price:

https://www.staubli.com/de/en/electrical-connectors/products/t-m-products/high-frequency-measurement/touch-protected-passive-probes.html

[scroeffie]

this one almost 100 euros   in the netherlands  https://www.conrad.nl/nl/p/staubli-set-isoprobe-iii-hp-sonde-aanraakveilig-35-mhz-100-1-3540-v-126120.html?WT.mc_id=affiliates%3Atradetracker%3Afeed%3A126120&utm_medium=affiliate&utm_source=tradetracker&utm_campaign=308958&utm_content=Shoparize.com+Shopping

 if the ground wire is to thin or not enough isolated is it dangerous for me or for the scope ?

[RogerG]

For you.

There's always the chance that you get the live wire on the ground cable depending from what you're doing. These shrink tubes are very thin. Another point is that you can have the live wire at the outer case of the bnc then. That's why I use a scope with isolated BNCs for this task.

[TomKatt]

For you.

There's always the chance that you get the live wire on the ground cable depending from what you're doing. These shrink tubes are very thin. Another point is that you can have the live wire at the outer case of the bnc then. That's why I use a scope with isolated BNCs for this task.

Or a differential probe...  Technically not 'isolated', but exponentially safer than a passive probe with a ground lead.  Especially useful if the device chassis isn't grounded to earth, like much crt gear.

[scroeffie]

than maybe its best if i buy this one  Stäubli SET Isoprobe III-HP Sonde Aanraakveilig 35 MHz 100:1 3540 V

only thing i dont understand is the 35mhz ?