... but I need to keep them isolated from each other. The neutrals on these two mains circuits (the 220v and the 110v) are not always exactly the same because of uneven loading, etc. You answered your question. Probes ground are connected to oscilloscope chasis, it will short your meters grounds an...

You may use some workaround to islolated USB - use laptop powered from battery. The truth is that laptop supplies are also isolated, but internal common mode cap's can make 127V floating potential. I use to measure mains voltages (400-600V) with 100:1 probe TESTEC TT-HV250 (Uin max=2,5kV). For safet...

Hi Everybody, This topic is intended to report an bugs / errors in newest software. Issue: changing time base causes application crash Hardware: Pico 5244B Config: collection time units: "times per division" Description : during normal job, from time to time I have to change timebase. Every 10-20 at...