梅特勒天平EL104 EL104 称量范围 120 g 可读性 0.0001 g Linearity 0.0002 g Repeatability 0.0001 g Sensitivity temperature drift 2.5 ppm/°C Size of weighing pan Ø 90 Settling time (typical) 4 s Calibration Cal Ext Adjustment with external weights 100 g Adjustment with internal weights no Dimensions 238 x 335 x 364 mm (LxWxH) Interfaces 标准RS-232