Vim li cas lub multimeter tsis tuaj yeem ntsuas qhov polarity ntawm kev hloov tam sim no?
Lub thiaj li hu ua alternating tam sim no hais txog nws cov polarity yog hloov pauv, thiab qhov kev hloov pauv ceev ceev heev, txawm tias nws yog tus taw tes lossis me ntsis siab dua dav dav digital multimeter, tsis tuaj yeem teb rau nws tam sim no polarity, nws polarity yog tus lej. ntawm lub sij hawm nyob rau hauv ib chav tsev ntawm lub sij hawm hu ua zaus, nws chav tsev yog Hertz, uas yog nyob rau hauv lub cim xeeb ntawm tus naas ej physicists Mr Hertz thiab lub npe ntawm lub chav tsev ntawm physics. Vim hais tias lub polarity ntawm lub hwj chim mov alternates li nrog ib tug dav multimeter tsuas yog tsis tau ntsuas nws polarity, yog hais tias yuav tsum tau to taub lub polarity ntawm ib lub sij hawm nyob rau hauv lub sij hawm, kuj yuav hais tau tias polarity ntawm nws instantaneous txoj kev uas yooj yim, uas yog tshwj xeeb rau kev soj ntsuam ntawm alternating tam sim no los yog ncaj qha tam sim no pulses ntawm electronics oscilloscopes.
Kev taw qhia ntawm kev hloov pauv tam sim no txhua lub sijhawm thiab tsis hais txog polarity. Yog hais tias qhov ntsuas tau hais ntawm cov kab hluav taws xob xoom kab, koj tuaj yeem ua si lub multimeter mus rau AC voltage ntawm qib siab tshaj plaws, ib txhais tes tuav lub taub hau dub, nrog tus cwj mem liab txhawm rau txheeb xyuas cov xaim, lub pointer deflection yog kab hluav taws, tsis deflect yog xoom kab. Tsis tas li ntawd, qee qhov digital multimeter niaj hnub no, nrog rau kev ua haujlwm ntawm lub zog ntsuas cwj mem.
Hloov tam sim no yog qhov loj thiab cov kev taw qhia ntawm lub sij hawm hloov pauv tam sim no, tsis muaj polarity, tsuas yog zaus, qhov zaus ntawm peb AC yog 50 Hz, uas yog, tam sim no hloov rov qab mus rau 50 zaug ib ob, cov kev taw qhia hloov 100 zaug, nug nws tus kheej yog ib qho teeb meem.
Yuav ua li cas ntsuas tam sim no nrog multimeter? Multimeter txoj kev ntsuas tam sim no
1, ua ntej ntsuas tam sim no, txiav txim qhov xwm txheej tam sim no (AC thiab DC), qhov loj me tam sim no.
2, Xaiv cov cuab yeej ntsuas kom zoo (xws li kev nyab xeeb, raug thiab yooj yim ntawm kev siv thaum ntsuas ntawm qhov chaw) thiab ntsuas iav.
3, Cov kauj ruam ua haujlwm:
(1) Yog tias nws yog cov khoom siv hluav taws xob me me (xws li cov khoom siv hluav taws xob, thiab lwm yam), koj tuaj yeem nyeem phau ntawv qhia txog cov khoom siv hluav taws xob ntsig txog cov lus piav qhia, feem ntawm cov lus qhia qee zaum ncaj qha rau cov khoom siv hluav taws xob ua haujlwm los ntawm ntau yam tam sim no cim. nyob rau hauv phau ntawv qhia. Yog tias phau ntawv qhia tsuas yog qhia txog kev siv hluav taws xob thiab qhov hluav taws xob, qhov tam sim no tuaj yeem suav los ntawm cov qauv "A=W / V". Thaum nws yog ib qho tsim nyog los ntsuas tag nrho cov tam sim no ntawm ob peb lub cuab yeej, ntxiv cov dej ntws ntawm tus kheej los ntsuas tag nrho cov tam sim no ntawm cov kab tseem ceeb.
Yog xav tau kev ntsuas tiag tiag:
(1) Xaiv cov iav uas tsim nyog ( ntsuas tam sim no, tus nqi tam sim no)
(2) Tshem tawm cov kab los ntsuas (tab sis cov khoom siv hluav taws xob thiab cov khoom thauj tsis tuaj yeem raug txiav, txwv tsis pub nws yog ib txoj kab luv luv!) (2) Txiav txoj kab los ntsuas (tab sis cov khoom siv hluav taws xob thiab cov khoom thauj tsis tuaj yeem raug txiav, txwv tsis pub nws yog luv luv Circuit Court!), lub multimeter yuav tsum tampered nrog cov kab (nco ntsoov tias cov koob), lub sij hawm no, qhov kev tiv thaiv ntawm multimeter yog yuav luag xoom, tam sim no ntws los ntawm lub multimeter yog sib npaug zos rau cov tam sim no ntws los ntawm. cov khoom siv hluav taws xob thiab cov khoom thauj.
(2) Yog tias nws yog cov khoom siv hluav taws xob loj (kev ua haujlwm voltage feem ntau 220V txog 380V), nws raug nquahu kom siv lub clamp-on ammeter (multimeter). Lub hauv paus ntsiab lus yog los tsim ib qho chaw kaw electromagnetic rau ntawm txoj kab hluav taws xob, thiab kev hloov pauv hauv electromagnetic teb ua rau lub multimeter los tsim ib qho tam sim no. Qhov tam sim no muaj kev sib raug zoo nrog cov ntsuas kab tam sim no, kom cov kab tam sim no tuaj yeem nyeem ncaj qha hauv ammeter.
