我們最常用到的儀器儀表是穩(wěn)壓電源和萬用表,如使用不當(dāng)則容易造成儀器儀表的損壞。
1 .穩(wěn)壓電源
造成穩(wěn)壓電源損壞的原因主要是過流,即接入負載后其電流超出了穩(wěn)壓電源的額定電流值。而造成過流的主要原因是對于制作作品工作時所需電流估計不足,或電路有故障,甚至有短路。防范的方法是用**。
2 .萬用表
目前常用的萬用表有數(shù)字式和指針式兩類。造成萬用表損壞的原因有超量程、擋位使用不當(dāng)、表筆極性接反和表筆插錯位置等。
對于指針式的萬用表在超量程、擋位使用不當(dāng)或表筆極性接反時,將造成指針過沖或反打,輕則將打彎指針,重則損壞表頭機械系統(tǒng),造成表針運動不平滑,甚至燒毀表頭或電阻。防范措施是,測量前一定要核對擋位是否正確,在不知到所測范圍和極性時應(yīng)從最大擋位試起,這樣即使極性相反也不至于造成嚴重的指針反打。
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公司名稱:廈門泰尼電氣有限公司
聯(lián)系人:小黃(銷售代表)
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