前言我厂自1976年开工以来,尿素定量包装秤一直使用从西德引进的机械秤,这种秤称重机构复杂,利用机械标尺位移的杠杆原理实现定量控制。使用机械秤、精度低(允差±200g),维护量大,必须随时进行零位标定及成品复验,一旦出现超差只能靠增加或减少秤体上的附加配重来进行调整,计量精度越来越难以保证。而且 Preface Our factory has started to use the mechanical scale imported from West Germany since its construction in 1976. The scale weighing mechanism is complex and quantitative control is realized by using the lever principle of mechanical scale displacement. The use of mechanical scales, low accuracy (tolerance ± 200g), a large amount of maintenance, calibration must be carried out at any time zero and finished reinspection, in the event of over-tolerance can only be increased or decreased by the additional weight on the scale body to adjust, measure Increasing accuracy is difficult to guarantee. and