1) Ahịrị eriri eriri arụnyere ọhụrụ ga-enwerịrị nyocha nnabata yana usoro nnabata zuru oke tupu etinye ya n'ọrụ.
2) Maka eriri ndị enwetala ọkụ ọkụ ihe karịrị otu izu mana ihe na-erughị otu ọnwa, a ga-eji megohmmeter tụọ nguzogide mkpuchi ha tupu ebugharịa ya. Nguzogide mkpuchi ekwesịghị ibelata site na 30% ma e jiri ya tụnyere ndekọ ule gara aga (n'otu okpomọkụ). Ma ọ bụghị ya, a ga-emerịrị nnwale voltaji nke DC. Maka eriri nke enwetala ọkụ ọkụ ihe karịrị otu ọnwa mana ihe na-erughị otu afọ, a ga-emerịrị ule voltaji na-eguzogide DC na ọkara nke voltaji mgbochi mgbochi.
3) Maka eriri nwere ọdụ re{1}, njikọ etiti, ma ọ bụ njikọ njikọ etiti arụnyere ọhụrụ, a ga-enyocharịrị ọnọdụ nke usoro ahụ, a ga-eji igwe megohmmeter tụọ nguzogide mkpuchi ahụ, na a ga-emerịrị nnwale voltaji na-eguzogide. Naanị mgbe ule niile gafechara, enwere ike ikwe ka eriri maliteghachi ọrụ.
