Hi all!
Thanks for all the suggestions. After viewing most of joeqsmith's videos regarding his tests and that the meter is UL certified for 250€ shipped with all of the features I'm looking for plus some (except for the wattmeter part, but then that was just a nice extra of the UT71E) I finally went with the Brymen BM869s. I just wanted something nice with some actual protection regarding random spikes. Didn't matter if it was yellow, red, green or blue!
The USB adapter is a bit pricy, but it includes their software i guess. Is the Brymen protocol standard or open?
Now to see if the UT71E is repairable
Resistance, diode, continuity, capacitance, uA, mA are damaged. Voltage shows different values if the polarity is swapped
Anywhere to learn about DMM input protection circuits? or is it just resistors, MOVs, PTCs and clamps?
I'll also look into external protection circuits, attenuators and at least one DIY HV divider. Have a 150KV project in the no longer so distant future.
Again thanks!