絕緣電(dian)(dian)(dian)阻(zu)(zu)測(ce)試儀(yi)顯(xian)示(shi)短路(lu)電(dian)(dian)(dian)流的大(da)小可反映出該兆歐表內(nei)部顯(xian)示(shi)高壓(ya)源內(nei)阻(zu)(zu)的大(da)小。當被測(ce)試品存在電(dian)(dian)(dian)容(rong)(rong)量(liang)時，在測(ce)試過(guo)(guo)程的開始階段，絕緣電(dian)(dian)(dian)阻(zu)(zu)測(ce)試儀(yi)內(nei)的高壓(ya)源要(yao)通過(guo)(guo)其(qi)內(nei)阻(zu)(zu)向該電(dian)(dian)(dian)容(rong)(rong)充電(dian)(dian)(dian)，并逐步將電(dian)(dian)(dian)壓(ya)充到絕緣電(dian)(dian)(dian)阻(zu)(zu)測(ce)試儀(yi)的顯(xian)示(shi)額定高壓(ya)值(zhi)。顯(xian)然，如果試品的電(dian)(dian)(dian)容(rong)(rong)量(liang)值(zhi)很大(da)，或高壓(ya)源內(nei)阻(zu)(zu)很大(da)，這一充電(dian)(dian)(dian)過(guo)(guo)程的耗時就會加長(chang)(chang)。其(qi)長(chang)(chang)度可由R內(nei)和C負載的乘積決定。

絕緣電阻測(ce)試儀主要特點(dian)：

   雙路電池(chi)輸入(ru)設計：可充電電池(chi)或主電池(chi)輸入(ru)

　　數字/模擬雙顯(xian)示測試結果

　　測(ce)試電壓由(you) 50V 至 10KV 可調

　　內置多種(zhong)自(zi)動測試程序

　　測(ce)試上限擴展：35TΩ

　　提(ti)供USB與RS232接口下(xia)載數據(ju)