I find that CPS CC220 is affected a lot from refrigerant swishing around in the cylinder and dances around a whole ounce or two. (reads to 1/4 oz), but it reads steady with something like a dumbbell weight.
Is CPS supposed to be decent?
My 56 lbs shipping scale that reads to 1/10 oz reads much more steadily. It reads rock steady and the swishing liquid doesn't affect the reading.