As far as I know the "Rohde & Schwarz HMC8012" is the only benchtop DMM, being able to measure Volt and Ampere at the same time, having this special build in feature...
![](https://i.postimg.cc/tgz0dwJt/Bildschirmfoto-vom-2021-08-13-13-24-57.png)
..., without ruining the relays and even showing power on its third display space - I did a small test with three white diodes:
![](https://i.postimg.cc/nLVxWp6w/IMG-8897.jpg)
Because I am on linux I haven't used the "R&S software" so far. Unfortunately, I haven't managed to use TestController showing more than one measurement at the same time either. I only use LAN for logging. When I am sitting in front of the instruments, I prefer using knobs and buttons instead of the keyboard and mouse.
Allthough I bought my "Rigol DM3068" in used condition, I don't want to do the test with an one ohm precision resistor; there are also some limtations. Either you have a lemming switching the test leads in µs or you have to do it the way it is mentioned in this video by keysight:
ht*
you have to copy and paste the link*tps://www.youtube.com/watch?v=Y6xnLkiUMn8
Doing it like this, you are in a way able to "copy" the build in function of the "HMC8012" in a "more or less self-destructive way" considering the price of the equipment.
So, to put it in a nutshell, anyone will tell you, that you need at least two DMMs or benchtop DMMs to measure V and A at the same time in a perfect and professional way, thus you have a perfect view on any decisive measurement and change in ms, without missing anything during switching time, if the DMMs log that fast via LAN...
![](https://i.postimg.cc/gj4RpYgt/Bildschirmfoto-vom-2021-08-13-14-50-12.png)
...and get a pefect overview within TestController by HKJ:
![](https://i.postimg.cc/gk9nTL4S/Bildschirmfoto-vom-2021-08-13-14-33-36.png)
Cheers.