k thiab m txhais li cas hauv seem tsis kam ntawm digital multimeter?
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 khoom siv digital multimeter kuj 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 rau cov ntsiab lus sib txawv. Yog hais tias nws yog me me sawv cev rau milliohms, thaum lub peev M sawv cev rau megohms.
Cov ntaub ntawv txuas ntxiv:
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 tus resistor tuaj yeem kuaj tsis tau tshem nws.
Kev ua haujlwm ntawm ntau lub zog hauv multimeter kuj iav yog:
1, ntsuas qhov kev tiv thaiv ntau yam, yog rau koj los ntsuas qhov kev tiv thaiv tus nqi yog xaiv qhov zoo ntawm qhov ntsuas tus nqi ntawm qhov yuam kev me me, qhov tseeb dua.
Yog tias koj yog 1000 ohms tsis kam, koj yuav siv 2000 iav ntsuas tus nqi tshaj li 20K ntsuas qhov tseeb dua, uas yog, koj ntsuas qhov ntsuas qhov tsis kam ntawm qhov tsis kam ntawm qhov ze rau lub iav, ntsuas tus nqi siab dua.
2,0-200Ω用200档;200-2000Ω用2000档;2000-20k用20K档;20K-200K用200K档;
