Kev tiv thaiv yog ntsuas ntawm qhov hluav taws xob thaiv. Qhov tseem ceeb kuj sib txawv, los ntawm ob peb milliohms (mΩ) rau kev tiv thaiv kev tiv thaiv mus rau billions ohms rau rwb thaiv tsev tsis kam. Ntau DMMs ntsuas qhov kev tiv thaiv me me li 0.1 ohms, thiab qee qhov kev ntsuas tuaj yeem siab li 300 megohms (300,000,000ohms). Yog tias qhov kev tiv thaiv loj heev, Fluke multimeter yuav tso saib "OL", qhia tias qhov ntsuas tsis kam tshaj qhov ntau. Thaum ntsuas qhov qhib Circuit Court, "OL" tshwm sim.
Kev tiv thaiv yuav tsum tau ntsuas nrog lub zog hluav taws xob tawm, txwv tsis pub kev puas tsuaj rau lub ntsuas hluav taws xob lossis lub rooj tsav xwm hluav taws xob yuav tshwm sim. Qee qhov digital multimeters muab kev ua haujlwm ntawm kev tiv thaiv thaum lub teeb liab hluav taws xob tsis raug txuas rau hauv hom kev tiv thaiv. Cov qauv sib txawv ntawm DMMs muaj peev xwm tiv thaiv sib txawv.
Txhawm rau ntsuas qhov tseeb ntawm qhov tsis muaj zog, qhov tsis kam ntawm cov hlau ntsuas yuav tsum tau muab rho tawm los ntawm tus nqi ntsuas. Cov kev xeem cov hlau lead kuj tseem ceeb nyob nruab nrab ntawm {{0}}.2Ω thiab 0.5Ω. Yog tias qhov kev tiv thaiv ntawm qhov kev xeem ua ntau dua 1Ω, qhov kev xeem coj yuav tsum tau hloov.
Yog tias cov khoom siv digital multimeter siv tsawg dua 0.6V DC voltage los ntsuas qhov tsis kam, nws tuaj yeem ntsuas qhov ntsuas tus nqi ntawm Circuit Court board cais los ntawm diode lossis semiconductor. Nws tuaj yeem kuaj tsis tau tshem tawm cov resistor.
