一、兆歐表屬于哪一類儀表
兆(zhao)歐表屬于(yu)電(dian)工(gong)測試儀器中的(de)電(dian)阻測試儀表類別。
因為兆歐表主要用于測(ce)試電(dian)(dian)(dian)氣設備(bei)的絕緣電(dian)(dian)(dian)阻(zu),而(er)電(dian)(dian)(dian)阻(zu)測(ce)試儀表則是(shi)用來測(ce)量電(dian)(dian)(dian)路中的電(dian)(dian)(dian)阻(zu)值。在電(dian)(dian)(dian)氣設備(bei)維護和(he)電(dian)(dian)(dian)力安全檢測(ce)中,兆(zhao)歐表經常被使用,因此被歸為電(dian)(dian)(dian)工(gong)測(ce)試儀器中的電(dian)(dian)(dian)阻(zu)測(ce)試儀表類別。
二、兆歐表和萬用表區別在哪里
1、組成結構不同
(1)兆歐表(biao)由中大規(gui)模(mo)集成(cheng)(cheng)電路組成(cheng)(cheng)。本(ben)表(biao)輸出(chu)功率大,短路電流值高(gao),輸出(chu)電壓等級多(每種(zhong)機型(xing)有四個(ge)電壓等級)。
(2)萬用(yong)表由表頭、測量電路及(ji)轉換開關(guan)等三個主要部分組(zu)成(cheng)。
2、工作原理不同
(1)兆(zhao)歐表通(tong)過(guo)用一個電壓激勵被測裝置或網絡,然(ran)后測量激勵所產生(sheng)的電流,利(li)用歐姆定律測量出電阻(zu)。
(2)萬用表的(de)基本原理是利用一只靈(ling)敏(min)的(de)磁電(dian)式直流(liu)電(dian)流(liu)表(微(wei)安(an)表)做表頭。當微(wei)小(xiao)電(dian)流(liu)通過表頭,就會(hui)有電(dian)流(liu)指示。
3、用途范圍不同
(1)兆歐表(biao)是電(dian)(dian)力、郵(you)電(dian)(dian)、通信、機電(dian)(dian)安裝和維(wei)修以及利用電(dian)(dian)力作為工(gong)業動力或能源的工(gong)業企業部(bu)門常(chang)用而必不可少的儀(yi)表(biao)。它適用于(yu)測量各種(zhong)絕(jue)緣材料的電(dian)(dian)阻值及變壓器(qi)、電(dian)(dian)機、電(dian)(dian)纜及電(dian)(dian)器(qi)設(she)備等的絕(jue)緣電(dian)(dian)阻。
(2)萬(wan)用(yong)(yong)表不(bu)僅可(ke)以(yi)用(yong)(yong)來(lai)測量(liang)被測量(liang)物體的電(dian)(dian)阻,交直流(liu)電(dian)(dian)壓(ya)還可(ke)以(yi)測量(liang)直流(liu)電(dian)(dian)壓(ya),甚至有的萬(wan)用(yong)(yong)表還可(ke)以(yi)測量(liang)晶(jing)體管的主要參數以(yi)及電(dian)(dian)容(rong)器的電(dian)(dian)容(rong)量(liang)等(deng)。