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用万用表测电流方法讲解

点击数:2019-07-08 16:10 来源:未知

  今天为大家介绍一项国家发明专利——一种限流电路及包含该限流电路的电能表。该专利由国网浙江省电力公司电...

  万用表的用法之前给大家说过一些,讲述的算是比较简单的,今天说一下较为难点的:电流的测量方法。万用表测电流算是比较难的了,和测电压有所不同,测量电压很简单直接把表笔连在待测电器两端就可以了,原电路可以不动,但是电流可不行,如果原电路不动直接把表笔连在电器两端,这是相当危险的,具体应该怎么测呢?今天给大家详细说一下。

  拿到一款万用表先观察一下万用表的表盘,在表盘上找到我们所要测量参数的档位,然后估算待测参数的大小,如果没把握可以旋至该档位的最大量程,然后把表盘旋至该位置就可以了,如果有交流直流或其它情况需要区分,一定不要忘了区分。

  这样说可能不太明白,大家可以看着下面这张图,在这款万用表上有两种电流测量方式,一种是直流电流一种是交流电流,可以确定我们所选档位肯定在这里面,然后再判断一下我们测量的是直流还是交流,由于采用12V直流电源供电,中间还串联一个直流电机,所以我们选用直流档位,如果不确定待测电流大小可以选择最大量程,例如直流电流档位就是直流20A,如果需要换下表孔,还得把表笔更换一下,像电流就需要更换一下,把红表笔插在最左面的位置。

  观察好万用表量程,就可以测量了,但是在测量的时候一定要注意测量电流需要把表笔串联在电路中,这和电压有很大的不同,测量电压直接把表笔连在待测电器两端就可以了。

  “电力系统是能源链的核心环节,但并非全部,在大规模清洁替代及电能替代的情况下,智能电网必须融入智慧能....

  电子助力转向是依靠电机进行辅助给予动力,而机械液压助力转向则是通过油泵提供动力来进行辅助,虽然早期的液压助力基本都是使用在大型机械上面,但是随着后期车辆的逐渐普及,经过技术的发展和沉淀,最近几年液压助力技术也发展的十分成熟了。

  可能会有网友会问,为什么电流就不能直接连在待测电器的两端,其实这和电表内部构造有些关系,在选择电压档的时候万用表的内阻是趋近于无穷大,就相当于断路,把它连在待测电器两端并不会对电路造成太大的影响,但是电流档可不一样,把万用表转至电流档,万用表的内阻是趋近于0的,所以如果把表笔直接连在待测电器两端,这相当于回路中一个负载发生了短路,这是有一定的危险性,所以测量电流的时候一定要连对。

  安科瑞股份电气有限公司【代码:300286.sz】是一家为智能电网用户端提供智能电办、电能管理、电气安全等系统性解决方案的少数几家企业之一。

  由于测量的电流是直流,所以在表针连反的时候,在数字的最前方会有一个“-”符号,数字大小都一样,数字万用表连反没有太大的影响,但是指针式就尽量避免把表针连反,否则有可能损坏表针。

  4、保证功率因数0.000~1.000的准确测量,尤其适用于低功率因数负载的检测。

  今天为大家介绍一项国家发明专利——具有快速安装功能的电能表。该专利由苏州工业园区和顺电气股份有限公司...

  细心的朋友可能会发现,我们讲述的这款万用表的最大量程只有20A,如果电流再大该怎么办?电流再大就不能使用这种万用表了,就得用钳形万用表去测,那种是专门用来测大电流的。

  \u628a\u8868\u7b14\u4e32\u8054\u5728\u7535\u8def\u4e2d

  \u5927\u7535\u6d41\u7528\u94b3\u5f62\u4e07\u7528\u8868

  由于电子政务是建立在大数据时代背景下, 计算机网络技术的基础之上, 所以传统的电子政务的发展模式会将关注点大量投入到硬件、软件的建设而忽略了建设后政务平台的运行和管理。其实, 计划、组织、领导、控制等管理职能不仅对于企业的管理运作至关重要, 同样也适用于电子政务领域。由于对管理的不重视, 不注重服务系统和数据的维护, 才会导致一些网上政务平台出现崩溃, 卡顿, 甚至信息泄露等安全隐患。

  1、质疑人的名称、地址、邮编、联系人及联系电线、采购人名称、项目名称、项目编号、包别号(如有);

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  步骤一,获取受校验电能表的如下参数:额定电压U、额定电流I、电能表常数C和误差等级;

  而CAXA RAY就是作用于筋膜层,通过按摩深层提拉,真正避免和恢复面部肌肉的下垂。很适合对抗初老,所以想要淡化法令纹、瘦脸的小伙伴可以试试这款。

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  在电缆隧道综合监控系统中,主要包括视频监控子系统,电缆表面温度测量子系统,泄露电流测量子系统,烟雾传感器,温湿度传感器,井盖开关状态监测子系统和中心平台等。

  0&&!t.isPlainObject(s[i]))return r;s=s[i]}return t.isPlainObject(s)?t.extend({},s):s},e.setConfig=function(i,s){if(!i)return e.events.trigger(warn.config,setConfig parameter key is null or undefined),e;if(t.isPlainObject(i))return r(!0,n,i),e;for(var o,u,a=n,f=i.split(.),l=!1;f.length0;){if(u=f.shift(),void 0===a[u]&&(a[u]={}),!t.isPlainObject(a[u])&&f.length>

  DDZY208型单相费控智能电能表能够地计量正向有功电能、反向有功电能,且可以实现分时计费的功能。电能表采用液晶显示,具有红外和RS485通讯接口,并可按照用户的用电情况,进行通断电控制。同时它采用高安全性的接触式CPU卡,并内置ESAM安全模块,可以实现当地费控功能。本仪表为采用的超低功耗大规模集成电路手艺及SMT工艺制造的高新技术产物,关键元器件选用国际知名品牌的长竞拍十分激烈寿命器件,提高了产品的可靠性和使用寿命。

  今天为大家介绍一项国家发明授权专利——一种电能表实际运行环境的仿真校验方法。该专利由国家电网公司申请...

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