兆歐表是電力、郵電、通信、機電安裝和維修以及利用電力作為工業動力或能源的工業企業部門常用而必不可少的儀表。絕緣電阻測試儀適用于測量各種絕緣材料的電阻值及變壓器、電機、電纜及電器設備等的絕緣電阻。
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　　絕緣電阻測試儀工作原理

　　由中大規模集成(cheng)(cheng)電(dian)(dian)(dian)(dian)路組成(cheng)(cheng)。本(ben)表(biao)輸(shu)出功率大，短路電(dian)(dian)(dian)(dian)流(liu)(liu)值(zhi)高，輸(shu)出電(dian)(dian)(dian)(dian)壓等級(ji)多(duo)(有四個電(dian)(dian)(dian)(dian)壓等級(ji))。工作原理為由機內電(dian)(dian)(dian)(dian)池作為電(dian)(dian)(dian)(dian)源(yuan)經(jing)(jing)DC/DC變(bian)換產(chan)生的直(zhi)(zhi)流(liu)(liu)高壓由E極出經(jing)(jing)被測試品到(dao)(dao)達L極，從(cong)而產(chan)生一個從(cong)E到(dao)(dao)L極的電(dian)(dian)(dian)(dian)流(liu)(liu)，經(jing)(jing)過I/V變(bian)換經(jing)(jing)除法器完成(cheng)(cheng)運(yun)算直(zhi)(zhi)接將被測的絕緣電(dian)(dian)(dian)(dian)阻值(zhi)由LCD顯示出來

　　絕緣電阻測試儀產(chan)品特點

　　1.輸(shu)出功率大(da)、帶載能力(li)強(qiang)，抗(kang)干擾能力(li)強(qiang)。

　　2.本表外殼由高強度鋁(lv)合(he)金組成，機(ji)內設(she)有(you)(you)等電(dian)位(wei)保(bao)護環(huan)和四階有(you)(you)源低通濾波器，對外界工頻及強電(dian)磁場可起到(dao)有(you)(you)效的屏蔽作用(yong)。對容(rong)性試(shi)(shi)品測(ce)量(liang)由于(yu)輸出短路電(dian)流大于(yu)1.6mA，很容(rong)易使測(ce)試(shi)(shi)電(dian)壓(ya)迅速上升到(dao)輸出電(dian)壓(ya)的額定值。對于(yu)低阻值測(ce)量(liang)由于(yu)采用(yong)比例法設(she)計故電(dian)壓(ya)下落(luo)并不影響測(ce)試(shi)(shi)精度。

　　3.不需人力作功，由電池供電，量程可自動轉換。一目了然的面板操作和LCD顯示使得測量十分方便和迅捷。

4.本絕緣電(dian)(dian)阻測(ce)試儀表輸(shu)出(chu)短路電(dian)(dian)流可(ke)直接測(ce)量，不需帶載(zai)測(ce)量進行估算。