Kawm tau li cas siv lub tester

Tu siab, muaj coob tus neeg tsis nco qab hais tias hluav taws xob engineering kev kawm ntawv muaj kawm ib ob peb xyoos. Lawv kawm tsis tau tsuas yog dab tsi siv cov tester, tab sis kuj muaj kev ruaj ntseg cov kev cai. Txawm li cas los, nrog cov dag zog mus qhia yuav mastered los ntawm txhua leej txhua tus. Yog li ntawd niaj hnub no peb mam li tham txog yuav ua li cas Siv ib tug multimeter.

Ua ntej ntawm tag nrho cov, peb txiav txim yog li cas tiag seev yuav tsum tau nyob rau hauv lub tsev. Cov tswv fluorescent teeb (nqi - qhov no yog lawv cov zoo), kuj yuav tau pom hais tias tej zaum lub nights yog ntev teeb muaj, mus txog tsis pib. Koj muaj peev xwm, ntawm chav kawm, ib hnub tom ntej mus yuav tus tshiab, tab sis seb nws puas yuav daws tau qhov teeb meem no? Tom qab tag nrho, nws yog feem ntau heev txawv - nyob rau hauv ib tug txo hwj chim mov voltage. Nyob rau hauv cov ntaub ntawv no, koj yuav tsum tau sau ib daim ntawv thov mus rau qhov tsim nyog muab kev pab qhov kev thov mus soj ntsuam qhov teeb meem. Los ntawm txoj kev, lub teeb - nws yog lub feem ntau harmless. Lub voltage nco yuav kaw cia rau hauv lub computer khiav, thiab nrog rau cov poob tag nrho cov ntawm cov kev tshwm sim. Txiav txim seb voltage multimeter pab.

Qhov lub khws ntawm hluav taws xob khoom uas yuav muaj nyob rau ob hom kev universal seev - tester thiab multimeter. Cov yav tas, raws li lub npe implies, tso cai rau koj mus ua ntsuas sib txawv ntawm cov tsis. Thiab ntawm no lub tester rau lub vaj tse classical ntau diodes, cim tias seb thaum lub measured voltage, lub teeb kuj rau kev txiav txim theem neeg xyuas pib Circuit Court sam xeeb tswb (Test) thiab ib tug hais lus. Ntawm no yog ib tug nws, tus tester siv uas yuav tsum tau los sib tham ntxiv. Txawm li cas los, nyob rau hauv qhov tseeb, peb yuav tsom ntsoov rau cov multimeter. Tag nrho vim hais tias cov neeg yeej paub txog me ntsis hluav taws xob engineering, feem ntau confuse lub ob pab kiag li lawm, ib tug tester implying multimeter.

Yog li ntawd, yuav ua li cas siv ib tug tester? Ua ntej koj yuav kom paub tseeb tias cov kws yog ntsia undischarged roj teeb. Txwv tsis pub, cov kev ntsuas no yuav tsum erroneous. Feem ntau, ob probes, thiab peb qhov mus cuag lawv. Ib tug sojntsuam yuav tsum nco ntsoov yuav kev cob cog rua rau ib tug COM chaw nres nkoj. Qhov thib ob yog rau lwm cov kev ntsuas - kuj, voltage, tam sim no, nyob rau hauv milliamps. Tab sis lub thib peb tsuas yog rau cov kev ntsuas ntawm loj tam sim no thiab yog siv tsuas yog thaum no hom yog xaiv los ntawm lub pov ntawv xaiv tsa. Leej twg tsis paub yuav ua li cas siv lub tester yuav tsum ua tib zoo nyeem cov cim nyob ze terminals - nws hais tias nws tag nrho.

Probes yog tso kom raug. Tom qab ntxiv. Tam sim no koj yuav tsum hloov lub tsev (cov muajcai povntawv) las rau yam hom. Graduations nram qab no: DCV cheeb tsam ua hauj lwm pab los ntsuas DC voltage (nyob rau hauv no tsev neeg roj teeb thiab accumulators); ACV - rau alternating voltage (mains); DCA - yog ib qhov tam sim no; kuj - mus ntsuas e. kuj. Lub xub ntiag ntawm lwm yam tsis nyob rau cov qauv.

Ob peb cov kev cai: rau voltage probes kev cob cog rua thaum uas tig mus rau lub load, ib tug tam sim no - ib tug neeg xyuas pib so, zoo ncaj qha ntsuas lub impedance (yog hais tias nws tsis yog nyob rau hauv cov saw hlau).

Piv txwv li, koj yuav tau mus xyuas tus nqi ntawm cov voltage penlight roj teeb. Nws nominal voltage yog paub (1.5), li ntawd, peb xaiv qhov ze xws li, DCV 20 thiab kov probes rau nws muaj mob. Cov zaub yuav qhia cov kev tshwm sim. Yog hais tias lub nominal tus nqi yog tsis paub, cia li muab tso ib tug tshaj plaws txwv thiab txo yog tias tsim nyog.

Mus xyuas lub voltage nyob rau hauv lub tsev network, ib tug txheej selector 750 ACV (siab tshaj 200), ua tib zoo ntxig rau probes mus rau hauv lub qhov hluav taws xob thiab saib qhov tshwm sim.

Tus tam sim no yog ntsuas txawv, piv txwv li, txiav txim nws tus nqi noj teeb nyem tej zaum yuav ib tug ntaus ntawv los ntawm txuas cov kev sojntsuam hu rau ib tug roj teeb, thiab lub thib ob - mus rau lub opposite teeb nyem davhlau ya nyob twg. Tus Neeg Xaiv Tsa teem rau lub nqi siab tshaj plaws (e.g., 200 ma, tab sis tsis 10 A, uas peb sojntsuam davhlau ya nyob twg).

Kuj yog ntsuas heev tsuas - nyob rau hauv lub tsev yog muab nuj nqis, thiab ces dua li qub.

Nyob rau hauv hauv paus ntsiab lus, yuav ua li cas siv lub tester, muaj yog tsis muaj dab tsi nyuaj. Thaum uas siv cov ntsiab chav tsev - tsis mus muab cov ntsuas kom muaj nuj nqis thiab tsis tshua muaj neeg ceev faj.