Choyesa chofulumira cha DC ichi (chomwe chimatchedwa kuti DC winding resistance tester) ndiye chida chaposachedwa kwambiri choyezera kukana kwa DC kwa ma transformer.Imakonzedwa kuti iyeze kukana kwa DC kwa magawo atatu a ma windings a ma transfoma akuluakulu.Kukaniza kwa DC kwa ma windings a magawo atatu a transformer kumatha kuyesedwa nthawi imodzi.Pakuti pa-katundu voteji yoyendetsera thiransifoma, si koyenera kutulutsa chosinthira wapampopi mwachindunji, ndipo nthawi muyeso ndi gawo limodzi mwa magawo atatu a miyambo chikhalidwe gawo limodzi muyeso, amene angafupikitse kwambiri nthawi yogwira ntchito ndi mphamvu ya ntchito.Mamita okanira mwachindunji amatengera chiwonetsero chachikulu chamadzimadzi chamadzimadzi chokhala ndi skrini, mawonekedwe onse aku China, omveka bwino komanso mwachilengedwe, ndipo ntchitoyo ndiyosavuta.Ndipo pokhala ndi chosindikizira chamagulu ndi kukumbukira kwakukulu kosasunthika, mukhoza kusunga ndi kusindikiza zotsatira zake.Zomwe zimayesedwa ndizokhazikika, zachangu komanso zobwerezabwereza, ndipo ndiye chisankho chabwino kwambiri choyezera kukana kwa DC kwa ma transformer pamalopo.