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JA系列电子天平如何选购?

Update time:2020-03-31 16:32:21The number of clicks:3221TimesSize:T|T

JA系列电子天平选择应该从电子天平的精度(分度值e)上去考虑是否符合称量的精度要求。

如选0.1mg精度的天平或0.01mg精度的天平,切忌不可笼统地说要万分之一或十万分之一精度的天平,因为国外有些厂家是用相对精度来衡量天平的,否则买来的天平电子秤无法满足用户的需要。例如在实际工作中遇到这样一个情况,用一台实际标尺分度值d为1mg,检定标尺分度值e为10mg,大称量为200g的Mettler电子天平,用来称量7mg的物体,这样是不能得出准确结果的。


JA系列电子天平


在《JJG98-90非自动天平试行检定规程》中规定,大允许误差与检定标尺分度值“e”为同一数量级,此台天平的大允许误差为1e,显然不能称量7mg的物体;称量15mg的物体用此类天平也不是佳选择,因为其测试结果的相对误差会很大,应选择更高一级的天平,有的厂家在出厂时已规定了小称量的数值。因此我们在选购及使用电子天平时须考虑精度等级。
常州市衡正电子仪器有限公司 (Edit:冉冉科技)
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