The Tare Weight should not be more accurate than your scale can measure so that the application does not round. For kilograms this is to the thousandth 0.000, for pounds the hundredth 0.00, and for ounces the tenth 0.0.
You must set this option in the United States to comply with the Department of Agriculture Weights and Measure requirements. Setting this option allows the POS client to convert the item weight to the property’s UOM if the UOM received from a scale does not correspond to the UOM set from the Property Parameters module.
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