There is a good trick to use if you leave on vacation (or for monitoring breast milk for those new parents). You can freeze a cup of water, and throw a coin on top. If your freezer melts at any point, the coin will be at the bottom, not the top of the water glass when it refreezes.
Ice floats. Even if the most of the ice in the cup has melted, but there was a little bit of it left, the coin will stay on top.
From my personal experience: while we were away on vacation, there was a power outrage for 24_ hours. Coin was on top, but all ice cream and frozen packaged food was ruined. Not sure about big chunks of beef.
a variant is to put an ice cube out of its container and tilted on the rack inside the fridge. If it thaws, it will fail through the rack and not be where you left it when you check for it.
