福州卓凱電子科技有限公司

FCA330HM

05-05242-110

FCA330HM

1、直流電流的測量。先將黑表筆插入“COM”孔。若測量大于200mA的電流，則要將紅表筆插入“10A”插孔并將旋鈕打到直流 “10A”檔；若測量小于200mA的電流，則將紅表筆插入 “200mA”插孔，將旋鈕打到直流200mA以內(nèi)的合適量程。調(diào)整好后，就可以測量了。將 萬用表串進(jìn)電路中，保持穩(wěn)定，即可讀數(shù)。若顯示為“1.”，那么就要加大量程；如果在數(shù)值左邊出現(xiàn)“-”，則表明電流從黑表筆流進(jìn)萬用表。

　　交流電流的測量。測量方法與1相同，不過檔位應(yīng)該打到交流檔位，電流測量完畢后應(yīng)將紅筆插回“VΩ”孔，若忘記這一步而直接測電壓，哈哈！你的表或電 源會在“一縷青煙中上云霄”－－報廢！
　　三、電阻的測量

　　將表筆插進(jìn)“COM”和“VΩ”孔中，把旋鈕打旋到“Ω”中所需的量程，用表筆接在電阻兩端金屬部位，測量中可以用手接觸電阻，但 不要把手同時接觸電阻兩端，這樣會影響測量度的－－人體是電阻很大但是有限大的導(dǎo)體。讀數(shù)時，要保持表筆和電阻有良好的接觸；注意單位：在“200” 檔時單位是“Ω”，在“2K”到“200K“檔時單位為 “KΩ ”，“2M”以上的單位是“MΩ”。
　　四、二極管的測量

　　數(shù)字萬用表可以測量發(fā)光二極管，整流二極管……測量時，表筆位置與電壓測量一樣，將旋鈕旋到“ ”檔；用紅表筆接二極管的正極，黑表筆接負(fù)極，這時會 顯示二極管的正向壓降。肖特基二極管的壓降是0.2V左右，普通硅整流管（1N4000、1N5400系列等）約為0.7V，發(fā)光二極管約為 1.8～2.3V。調(diào)換表筆，顯示屏顯示“1.”則為正常，因為二極管的反向電阻很大，否則此管已被擊穿。

聯(lián)系人：王工

電話：15506917382

座機：0591-62182535

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傳真：0591-22989937

福州卓凱電子科技有限公司

我公司主要經(jīng)營西門子，歐姆龍，倍加福，橫河川儀，abb,施耐德等國外多家品牌，產(chǎn)品涉及變頻器，儀器儀表，變送器，可編程控制器plc和人機界面，工控機及氣動閥門等。產(chǎn)品廣泛應(yīng)用于全國各地，如：鋼鐵廠，石油廠，化工廠，水泥廠，啤酒廠，冶金廠，造紙廠，電力，監(jiān)控，水利水電，機械等各種不同的工業(yè)部門系統(tǒng)需要。

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