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Forum 全方位解析万用表在电子系统测试测量中的使用技巧
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全方位解析万用表在电子系统测试测量中的使用技巧

allenbiso
allenbiso over 15 years ago

“万用表”是万用电表的简称,它是我们电子制作中一个必不可少的工具。用途多,量程广,使用方便是万用表的优点。万用表能测量电流、电压、电阻、有的还可以测量三极管的放大倍数,频率、电容值、逻辑电位、分贝值等。万用表有很多种,现在最流行的有机械指针式的和数字式的万用表。它们各有优点。掌握万用表的使用方法是电子技术的一项基本技能。小小万用表,有很多的技术原理和使用技巧,不信,您看看我们这期半月谈的专题!

 

万用表分为指针式和数字式,它们各有方便之处,很难说谁好谁坏,最好是能够备有指针和数字式的各一个。业余电子制作有一个指针式的MF30型万用表也就可以了,这可是一种经典型号。还有元老级的MF500型万用表,廉价的MF50万用表,一般都可以在电讯商店买到。

 

万用表的三个基本功能是测量电阻电压电流,所以老前辈们叫它三用表。 现在的万用表添加了好多新功能,尤其是数字式万用表,如测量电容值,三极管放大倍数,二极管压降等,更有一种会说话的数字万用表,能把测量结果用语言播报出来。
对于电子初学者,建议使用指针式万用表,因为它对我们熟悉一些电子知识原理很有帮助。《指针式万用表使用与原理》将为我们介绍一些机械指针式万用表的原理和使用方法。

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