机械天平与电子天平的比测实验

Comparative Study of Mechanical Balance and Electronic Balance

机械天平和电子天平均是化学工作者常用的计量器具,正确选择天平可以保障化学测量结果的准确性。本文采用交替测量法比较了机械天平和电子天平的称量准确度,数据分析表明对于精密称量而言,利用砝码进行定点称量的结果来看,机械天平和电子天平的称量结果基本一致,称量同一物品时电子天平表现出较好的准确度和精密度;应根据实际情况如物品质量、精度要求等选择适当分度值、称量范围的天平。最后阐述了如何提高机械天平和电子天平测量的准确度。

The balance can be the right choice to protect the accuracy of the chemical measurements. The weight accuracy of mechanical balance was compared with that of electronic balance,using the alternative measurement method.The weights weighing result showed that accounting for precision weighing,weighing results of mechanical balance and that of electronic balance were consistent,electronic balance showed good accuracy and precision when weighing the same items. In addition,goods quality and accuracy requirements should be based on the situation to choice the balance,such as the value of indexing,weighing range. Finally,it was elaborated how to improve the accuracy of mechanical balance and electronic balance.