It is not possible (in principle) and it was never intended for peer review to protect against fraud. And this is ok. Usually if a result is very important and forged, other groups try to replicate and fail, after some time the original dataset (which needs to be kept for 10 years I think) will be requested and then things go done from there.

Assuming not good faith for peer review would make academia more interesting, only way would probably for the peer reviewer go to the lab and get live measurements shown. Then check the equipment...