Well, there is a problem here. Take this fish scale:
You hold the one end and put the hook into the fish, lift the whole thing and measure the weight. It works on the principle of the top of the spring being stationary and bottom connected to the weight.
Now, what if I asked you to measure the weight using that but that you can only use the hook end. Will you be able to measure the weight? Answer is no of course.
Same problem here. These devices have only one terminal. Measurement devices have two. Where do you connect the other wire in the instrument? Dangle it in the air? Some other earth reference? If so, why?
This is the same issue I had with analyzing Entreq. There is only one example of a one-wire device and that is an antenna. But the moment we go there analyzing such a device as an antenna, then the whole argument is lost as an antenna will pick up noise, not suppress it.
This is why I measure the output of the DAC. The DAC has two wires and we can measure what comes out of it electrically with and without the "grounding" device.