I had the same problem as others. The scale is not stable. If it just drifted up and down a tenth of an ounce it wouldn't be a problem, they all do it with 30lb freon when it's windy outside. This scale only ever went from half an ounce to an ounce at a time compared to my TIF and Robinair scales, they are very stable with very little fluctuation. I ended up sending this one back.
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