Yuav ua li cas yog cov multimeters

Lwm ntawm lub dav lub tsev kawm ntawv cov hoob kawm nyob rau hauv physics yog paub, tias lub hluav taws xob Circuit Court yog yus muaj los ntawm ib tug xov tooj ntawm tsis. Ntawm lawv, cov voltage nqi, kuj hu ua lub peev xwm nqi thiab hom tam sim no ntws los ntawm tus neeg xyuas pib, lub hwj chim noj los ntawm lub load los ntawm lub network, qhov kuj muaj nuj nqis (nyob rau hauv ohms) thiab ib co lwm tus neeg. Yuav kom ntsuas txhua tus ntawm cov tshwj xeeb pab kiag li lawm tau tsim. Rau qhov no tam sim ammeters, voltage -. Voltmeters, ohmmeters rau kuj, thiab lwm yam Txawm li cas los, yog dab tsi yog hais tias muaj yog ib tug yuav tsum tau ntsuas ntau dua ib tug parameter, tab sis ob peb? Hnav tag nrho cov uas twb muaj lawm li nrog ib tug? Nyob rau hauv cov ntaub ntawv no, tsis txhob hais lus ntawm cov kev mus ncig thiab yooj yim. universal dlaws tau raug tsim los daws tau qhov teeb meem no: pab kiag li lawm feem combining nyob rau hauv ob peb lwm tus neeg. Piv txwv li, hloov mus rau tus thawj txoj hauj lwm ntawm ib tug tshwj xeeb mus, koj yuav ntsuas lub voltage, nyob rau hauv lub thib ob tshuab txais nrog logic, uas tso cai rau los mus txiav txim tus kuj. Yooj yim! Xws li yog lub npe hu ua multimeters. Qhov ntawd yog "multi" - ib tug ntau ntawm, zoo, "meters" - kev ntsuas. Qhov thib ob lub npe, uas yog tsis heev muaj tseeb, - testers. Niaj hnub nimno cov multimeters cia los ntsuas ib tug plurality tsis los ntawm ib tug yooj yim kuj Circuit Court feem rau ambient kub.

kev hloov kho

Txawm tias tus poj muaj ntau haiv neeg ntawm cov pab kiag li lawm, lawv muab faib ua ob lub ntsiab pawg: analog thiab cov multimeters. Rau feem ntau cov neeg siv yog ntau yooj yim Ob txhais, txawm hais tias tus thawj muaj ob peb zoo, txawm li cas los, tej.

Cov kawm tiav teev thiab xub

Analog qauv yog yuav luag tawm ntawm ntau lawm, raws li qhov kev thov rau lawv yog me me, muab piv rau lwm txoj (Cov multimeter DT yog tam sim no incredibly nrov). Txawm li cas los, lub lag luam yog tseem tau mus ntsib tshiab, uas zoo sib xws kev daws teeb meem, yog li ib nyuag saib lawv. Analog pab kiag li lawm mas yooj yim heev kom paub qhov txawv ntawm lwm tus neeg rau hauv lub cev yog ib tug mus Ratchet rau xaiv ntsuas hom, raws li zoo raws li ib tug ncaj loj bar nrog ib tug scale uas ib tug faib cim (zoo li tus kab). Thaum txuas cov kev sojntsuam mus rau lub Circuit Court tam sim no tshwm sim nyob rau hauv lub puab coils, magnetic teb yog generated thiab lawv sib tham ua rau lub cim tias seb thaum xub deflected ntawm ib tug tej yam kaum sab xis. Nws tsuas tseem mus xam tus nqi ntawm division thiab kawm txog cov nqi ntawm cov measured parameter. Cov multimeters nyob rau hauv no hwm ntau preferable vim qhov yuam kev yog cais los ntawm cov neeg txhais lus ntawm cov muab qhab nia scale hauv qab no tshaaj ratchet txwv.

zaub xov tooj

Cov Multimeters saib yuav luag tib yam li tus analog, tsuas hais tias cov pointer thaiv yog hloov los ntawm ib tug compact screen, uas qhia txog cov kev ntsuas tau. Internal kev hloov, ntawm chav kawm, yog ntau npaum li cas tseem ceeb. Nyob rau cov ntawv luam Circuit Court board muab tso nti uas ua ib tug tag nrho ua cov khoom teeb liab los ntawm cov kev sojntsuam. Feem ntau, ob peb ntxiv ntsiab yog siv - resistors, capacitors thiab coils. Ntawm cov yus nta ntawm cov kev txiav txim siab, nws muaj nqis ntsoov teev ib tug me yuam kev ntawm kev ntsuas - siab raug chav kawm ntawv, xam qhovkev txawm nyiaj txiag qauv, rau piv txwv, xws li 838 cov multimeter.

Summing li

Rau ib tug txiv neej uas puav muaj ib tug yuav tsum tau ntsuas tej ciaj ciam ntawm lub Circuit Court nyob rau hauv tsev los yog, piv txwv li, nyob rau hauv lub tsheb hluav taws xob system, uas tsis muaj nqi cov tester yog qhov zoo tshaj plaws kev xaiv. Nws suffices to taub txog cov kev cai siv ratchet thiab to taub lub hauv paus ntsiab ntawm xaiv qhov ntsuas ntau yam.