真空(kong)斷路(lu)器是(shi)判斷真空(kong)管真空(kong)度(du)(du)劣化與(yu)否(fou)的(de)(de)(de)常用(yong)(yong)(yong)方法是(shi)工頻(pin)耐壓法，這種方法只是(shi)能判斷真空(kong)度(du)(du)嚴重劣化的(de)(de)(de)滅弧(hu)室(shi)(shi)。而當真空(kong)度(du)(du)劣化到(dao)(dao)10-1-10-1 Pa時，雖(sui)然擊穿電壓沒有降低，但滅弧(hu)室(shi)(shi)已不合格(ge)。HTZK-IV型真空(kong)開(kai)關真空(kong)度(du)(du)測(ce)試儀采用(yong)(yong)(yong)新型勵(li)磁線圈，運用(yong)(yong)(yong)磁控(kong)放電法測(ce)試滅弧(hu)室(shi)(shi)的(de)(de)(de)真空(kong)度(du)(du)，不必拆卸(xie)滅弧(hu)室(shi)(shi)。同時采用(yong)(yong)(yong)微機進(jin)行(xing)同步控(kong)制與(yu)數據采集處理，使(shi)滅弧(hu)室(shi)(shi)真空(kong)度(du)(du)的(de)(de)(de)現(xian)場測(ce)試靈敏度(du)(du)達(da)到(dao)(dao)了10-5Pa。本儀器Z突出的(de)(de)(de)特點是(shi)