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电子天平的位置对正常称重很重要。将电子天平放置在房间的一角,我们尽量避免将电子天平放置在产生气流的位置,如门窗等通风口,或者人流量大的位置。德安特电子分析天平通常配有防风罩。如果将电子天平放置在有风的地方,实验台会晃动,这样将会导致电子天平称量不准确(解释:稳固安定;没有变动)。分析天平是定量分析中不可缺少的重要仪器,重量为0.0001g(0.1毫克)。电子秤的正常位置是实现称重的关键。 分析天平的校准方法分为内校准和外校准。内校是指带有内校砝码的电子天平,便于一键调用和校准。对于外部校准,需要按下校准键并从外部放置砝码进行手动校准。使用电子天平的时候,我们首先应该检验并旋转天平使其达到水平的位置上。检查电源电压是否匹配,配置调压器,按要求开机预热。当天平拥有了足够的预热时间后,将电子天平的开关打开,电子天平将会自动调整至零点。当其稳定标志显示后,即可进行正式称重。
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NIM - National Institute of Metrology, China
OIML - Organisation Internationale de Métrologie Légale