I will add that I own an OHause Dial-O-Gram I can use if the electricity fails. I also have a small (60-gram limit) self-calibrating digital analytical balance by Torbal with a force restoration transducer that resolves 0.1 milligrams native, or 0.00154 grains and doesn't drift, either. I checked my powder scale check weights on it and had to trim some of them (light sandpaper to lighten and aluminum air duct tape slivers to add weight). The ones that come with powder scales are typically class 6 and not particularly tight. So far, all my scales are in good behaving agreement.
I meant to say, when I left the National Metallic scale for a month, I accidentally left it turned on for a month and it hadn't drifted.
Here's a chart I put together of standard check weight accuracy by class.
I meant to say, when I left the National Metallic scale for a month, I accidentally left it turned on for a month and it hadn't drifted.
Here's a chart I put together of standard check weight accuracy by class.