Yuav ua li cas ntsuas thiab nyeem tsis kam nrog multimeter
Hauv kev kho hluav taws xob Circuit Court boards, Circuit Court boards ntawm nws cov khoom tiv thaiv suav txog li 50% ntawm tag nrho cov khoom siv hluav taws xob, yog tias lub Circuit Court muaj qhov cuam tshuam tsis zoo yog ib qho ntawm cov khoom peb xav ntsuas.
Yog li yuav ua li cas siv multimeter los ntsuas qhov tsis kam thiab nyeem tus lej ntawm qhov tsis kam? Hauv qab no kuv muab cov teeb meem rau koj txog qhov no, ua ntej ntsuas kev tiv thaiv peb tau zoo dua ua ob txoj haujlwm zeroing, ib qho yog pointer multimeter mechanical zeroing; qhov thib ob yog ohm zeroing. Tom qab kev ua haujlwm ntawm ob kauj ruam no koj tuaj yeem xaiv qhov tsim nyog tus lej sib npaug rau kev ntsuas kev tiv thaiv, vim tias cov ntaub ntawv multimeter kuj tsis sib xws, peb xaiv cov ntaub ntawv sib npaug feem ntau xav ua kom lub ntsuas ntsuas ntsuas nyob rau hauv qhov sib txawv ntawm qhov ntsuas. qhov zoo tshaj plaws, thiab qhov ze ntawm tus pointer yog mus rau nruab nrab ntawm txoj hauj lwm teev qhov tseeb dua. Kuv xav tias nws yog qhov zoo tshaj los ua tus pointer hauv qhov ntsuas ntawm 1/3 txog 2/3.
Kev Nyeem Ntawv
Cov txheej txheem ntawm kev nyeem ntawv multimeter tsis nyuaj, uas yog, kev nyeem ntawv ntawm lub taub hau 'meter' yog muab sib npaug los ntawm qhov sib npaug, uas yog, tus nqi ntawm cov resistor yuav tsum ntsuas. Piv txwv li, los ntsuas tus nqi ntawm cov resistor yog 47 ohms, ces qhov ntau ntawm "Rx10" ntawm cov ntaub ntawv ohms, ces Hou multimeter pointer taw tes rau txoj hauj lwm ntawm 4.7, qhov kawg nyeem ntawv yog 4.7 x 10 rau 47 ohms. Yog hais tias qhov ntsuas ntawm cov resistors loj tuaj yeem xaiv qhov kev tiv thaiv loj dua, xws li Rx1k lossis Rx10K, lawv nyeem cov nqi tsis kam ntawm tib txoj kev.
Dab tsi yog qhov tshwm sim thiab ua rau tus pointer zoo tib yam thiab digital multimeters?
Nrog rau qhov zoo tib yam pointer multimeter ncaj qha rau hauv megohmmeter "L", "E" ob kawg ntawm kev ntsuas ntawm nws cov zis ntsuas DC voltage, qhov ntsuas tau thiab qhov ntsuas nominal tus nqi hluav taws xob tsawg dua (tawm ntawm qhov yuam kev ntau), thiab nrog cov digital. multimeter yuav tsis. Qhov laj thawj tseem ceeb yog qhov kev tiv thaiv sab hauv ntawm tus pointer multimeter me me, thaum lub digital multimeter sab hauv kuj tseem loj. Pointer multimeter sab hauv kuj yog me me, megohmmeter LE tso zis voltage yog txo ntau, tsis yog qhov tso zis voltage ntawm ib txwm ua haujlwm. Nws yuav tsum tau muab sau tseg tias, siv lub multimeter ncaj qha los ntsuas qhov tso zis voltage ntawm megohmmeter yog tsis ncaj ncees lawm, yuav tsum tau siv nrog ib tug loj nyob rau hauv tsis kam impedance ntawm lub electrostatic high voltage meter los yog ib tug voltage divider thiab lwm yam load kuj yog loj txaus los ntsuas txoj kev. .
