Hauv seem tsis kam ntawm digital multimeter, k thiab m txhais li cas?
Hauv kev tawm tsam, K sawv cev rau KΩ, piv txwv li txhiab ohms, thiab M sawv rau MΩ, piv txwv li megohms.
Lub k thiab m ntawm cov digital multimeter tiv thaiv iav yuav tsum yog lub peev K thiab M. Nco ntsoov tias tus me me thiab tus ntawv loj M tau sau rau ntawm no los sawv cev sib txawv. Yog hais tias nws yog me me sawv cev rau milliohms, thaum lub peev M sawv cev rau megohms.
Ntsuas qhov tsis kam nyob rau hauv ib qho resistor thaiv. Resistance qhov tseem ceeb sib txawv, los ntawm kev sib cuag ntawm ob peb milliohms (mΩ) mus rau kev rwb thaiv tsev ntawm billions ohms. Ntau cov digital multi-meters ntsuas qhov tsis kam qis li 0.1 ohm, nrog qee qhov ntsuas siab li 300 megohms (300,000,000ohms).
Kev tiv thaiv yuav tsum tau ntsuas nrog lub Circuit Court powered los yog kev puas tsuaj rau lub meter los yog Circuit Court board tuaj yeem tshwm sim. Qee qhov digital multimeters muaj kev tiv thaiv thaum lub teeb liab hluav taws xob tsis raug txuas rau hauv hom kev tiv thaiv. Cov qauv sib txawv ntawm digital multimeters muaj peev xwm tiv thaiv sib txawv.
Thaum ua qhov ntsuas qhov tseeb ntawm qhov tsis muaj zog, qhov kev tiv thaiv ntawm kev ntsuas cov hlau lead yuav tsum raug rho tawm ntawm qhov ntsuas tus nqi. 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 cov hlau lead yog ntau dua 1Ω, cov hlau lead yuav tsum tau hloov.
Yog hais tias cov digital multi-meter muab DC voltage tsawg dua 0.6V rau qhov ntsuas resistor, nws muaj peev xwm ntsuas qhov ntsuas tus nqi ntawm Circuit Court board cais los ntawm diode lossis semiconductor. Yog li cov resistor tuaj yeem kuaj tsis tau tshem nws.
