... high limit and low limit, like:5K-24K, 6K-24KProportion parameter setupIt can set different proportion of copper and silver density ... parameter valueSegment interfaceRS-232Instrument accessoriesaccessories, Thermometer, Tweezers, Calibration weight, Acadapter, Opration manualManufactureNapco Precision Instrument Ltd 300g/0.01g 1K-24K Density Electronic ...