Qhov twg ob qhov yuav tsum tau muab tso rau hauv multimeter ntsuas ammeter cwj mem?
Cov kev xeem coj ntawm lub multimeter muab faib ua liab thiab dub. Thaum siv, ntxig cov hlau kuaj liab rau hauv lub jack cim "ntxiv", thiab ntxig cov hlau lead dub rau hauv lub jack cim "-".
Lub ntsiab Performance index ntawm multimeter yeej nyob ntawm qhov kev ua tau zoo ntawm lub taub hau meter. Lub rhiab heev ntawm lub 'meter' taub hau yog hais txog DC tam sim no tus nqi ntws los ntawm lub taub hau 'meter' thaum lub pointer ntawm lub taub hau 'meter' yog deflected ntawm tag nrho cov nplai. Qhov me dua tus nqi, qhov siab dua ntawm lub taub hau meter. Qhov ntau dua qhov kev tiv thaiv sab hauv thaum ntsuas qhov voltage, nws qhov kev ua tau zoo dua.
1. Lub iav txoj hauj lwm yuav tsum ua raws li hom tam sim no los ntsuas. Ntawd yog, raws li AC thiab DC hom tam sim no koj xav ntsuas, xaiv cov iav kom raug, AC sib haum rau AC iav, thiab DC sib haum rau DC iav;
2. Xaiv qhov tsim nyog ntau yam, txwv tsis pub, nws muaj peev xwm hlawv lub multimeter. Yog tias koj tsis paub qhov loj ntawm qhov ntsuas tam sim no, koj yuav tsum xaiv qhov siab tshaj plaws. Piv txwv li, digital multimeter nrog 20 ampere ntau yam tuaj yeem ntsuas qhov tam sim no ntawm 4.4 kilowatts;
3. Txuas lub multimeter nyob rau hauv series mus rau cov hlau nyob ntawm cov khoom siv hluav taws xob. Ua li no, thawj kauj ruam yog tua hluav taws xob hloov. Qhov thib ob kauj ruam yog kom tshem tawm lub ntsaws thiab txuas lub 'meter' nyob rau hauv series; qhov thib peb kauj ruam yog ntsaws rau hauv lub ntsaws thiab tig rau ntawm tus tes hloov. Lub sijhawm no, kev nyeem ntawv ntawm multimeter yog raws li qhov xav tau.
Lus Cim: Nws yog qhov txaus ntshai heev los siv txoj kev no los ntsuas qhov tam sim no ntawm cov khoom siv hluav taws xob muaj zog, thiab nws yooj yim rau hlawv lub 'meter'. Pom zoo kom siv lub clamp ammeter. Ua li no, nws muaj kev nyab xeeb thiab yooj yim.
Qhov twg yuav tsum tau muab cov cwj mem liab thiab dub ntawm digital multimeter tso?
1. Kev ntsuas ntawm AC thiab DC voltage: Tig qhov hloov pauv mus rau qhov tsim nyog ntawm DCCV (DC) lossis ACV (AC) raws li qhov xav tau, ntxig cov hlau kuaj liab rau hauv V / Ω qhov, ntxig cov hlau kuaj dub rau hauv COM qhov, thiab txuas cov kev xeem coj mus rau hauv Circuit Court nyob rau hauv kev sim nyob rau hauv parallel, kev nyeem ntawv yog tso tawm kom pom.
2. Kev ntsuas ntawm AC thiab DC tam sim no: Tig qhov hloov pauv mus rau qhov tsim nyog ntawm DCA (DC) lossis ACA (AC), ntxig cov hlau kuaj liab rau hauv mA qhov (<200mA) or 10A hole (>200mA), thiab ntxig cov xim dub coj mus rau hauv lub qhov COM, thiab txuas lub multimeter hauv series mus rau hauv Circuit Court hauv kev sim. Thaum ntsuas DC ntws, cov digital multimeter tuaj yeem tso saib qhov polarity.
3. Kev ntsuas qhov tsis kam: Tig qhov hloov pauv mus rau qhov tsim nyog ntawm Ω, ntxig cov hlau kuaj liab rau hauv V / Ω qhov, thiab ntxig cov hlau lead dub rau hauv lub qhov COM. Yog tias qhov ntsuas qhov ntsuas tsis zoo tshaj qhov siab tshaj plaws ntawm qhov kev xaiv, lub multimeter yuav tso saib 1, thiab ntau dua yuav tsum tau xaiv rau lub sijhawm no.
Thaum ntsuas qhov tsis kam, cov hlau kuaj liab yog qhov zoo thiab cov hlau kuaj dub yog qhov tsis zoo, uas yog qhov sib txawv ntawm tus pointer multimeter. Yog li ntawd, thaum ntsuas cov polar Cheebtsam xws li transistors thiab electrolytic capacitors, koj yuav tsum tau them sai sai rau lub polarity ntawm kev xeem coj.
