Yuav ua li cas siv ib tug multimeter thiab ib tug rocking meter
1, Kev siv yooj yim ntawm multimeter
Muaj ntau hom digital thiab cov qauv ntawm multimeter, thaum siv nws, tsuas yog los ntawm kev paub txog cov txheej txheem kom raug peb tuaj yeem ua kom qhov tseeb ntawm cov txiaj ntsig kev xeem thiab kev nyab xeeb ntawm tib neeg thiab khoom siv!
(1) Kev siv cov jacks thiab hloov pauv hloov
Ua ntej ntawm tag nrho cov, raws li lub hom phiaj ntawm kev ntsuam xyuas los xaiv qhov chaw ntawm lub jack los yog hloov mus rau qhov chaw, vim yog siv cov ntsuas voltage, tam sim no thiab tsis kam, thiab lwm yam. alternately, nco ntsoov tsis txhob hnov qab hloov lub zog. Tsis txhob siv qhov ntsuas tam sim no lossis ntsuas qhov ntsuas qhov ntsuas los sib tham txog qhov voltage. Yog hais tias DC tam sim no los yog tsis kam ntsuas qhov 220 AC voltage, lub multimeter yuav hlawv tam sim ntawd ~
(2) Siv cov cwj mem xeem
Multimeter muaj tus cwj mem liab, xim dub, tsis txhob saib nws muaj ob, kev siv tsis tuaj yeem siv dawb, kuj yog ib qho kev kawm zoo, yog tias txoj hauj lwm txuas rau qhov thim rov qab, txuas qhov tsis ncaj ncees lawm, yuav ua rau muaj peev xwm ua tau. ntsuas thiab ntsuas qhov tsis raug lossis hlawv lub taub hau. General liab cwj mem rau "", dub cwj mem rau "-".
Lub rooj cwj mem tso rau hauv lub multimeter jack yuav tsum nruj me ntsis raws li cov xim thiab qhov zoo thiab qhov tsis zoo. Ntsuas DC voltage lossis DC tam sim no, nco ntsoov them sai sai rau qhov zoo thiab tsis zoo polarity ~ tsis muaj tam sim no, tus cwj mem nrog lub voj voog, ntsuas qhov hluav taws xob, tus cwj mem nyob rau tib lub voj voog, tsis tuaj yeem yuam kev ~
(3) Yuav ua li cas nyeem kom raug
Multimeter yuav tsum tau siv ua ntej kuaj xyuas seb tus pointer puas nyob rau hauv xoom lossis yim tawg me ntsis, xws li tsis taw tes rau xoom, tuaj yeem hloov kho ntawm lub hau ntawm lub tshuab hluav taws xob, hloov mus rau xoom ~ .
Multimeter muaj ntau tshaj li ib teev, yuav tsum paub txog qhov sib npaug ntawm kev nyeem ntawv, tsis tuaj yeem xam kom txuag tau qhov teeb meem saum npoo thiab AC thiab DC scale arbitrarily sib xyaw, ntau tsis tuaj yeem saib qhov tsis ncaj ncees lawm ~.
Multimeter cov khoom ntsuas tib yam muaj ntau tshaj ib qho, xws li DC voltage ntau 1V, 10V, 15V, 25V, 100V, 500V, thiab lwm yam, ntau yam kev xaiv yuav tsum tau ua kom tus pointer tag nrho teev 2/3 nyob ze. Kev ntsuas kev tiv thaiv, tus ntiv tes yuav tsum tau taw qhia rau qhov chaw ntawm cov ntaub ntawv ntau huab nyob ze ntawm tus nqi hluav taws xob Yin, kom qhov ntsuas qhov tseeb ~
2, kev ntsuas ntawm cov khoom siv feem ntau siv
(1) Kev ntsuas tsis kam
Nrog lub multimeter tsis ntsuas qhov tsis kam, thawj zaug yuav tsum luv luv rau tus cwj mem, twist lub xoom potentiometer xoom, kom tus pointer hauv ohm xoom. Thiab txhua txhua lub sijhawm tom qab lub iav hloov kuj yuav tsum tau kho qhov xoom potentiometer xoom. Nyob rau hauv kev xaiv ntawm ohm iav, sim xaiv qhov ntsuas ntsuas tus nqi nyob ze rau qhov chaw ntawm lub dial tiv thaiv kev nyeem txoj hauj lwm, txhawm rau txhim kho qhov tseeb ntawm qhov ntsuas tau; Yog hais tias tus resistor nyob rau hauv lub Circuit Court board, nws yuav tsum tau welded qhib ib tug ob txhais ceg yuav tsum tau kuaj, txwv tsis pub tus resistor muaj lwm yam shunt li, nyeem tsis raug! Kev ntsuas tus nqi tsis kam tiv thaiv, tsis txhob kov cov ntiv tes ntawm ob txhais tes, raws li, tus meter cwj mem thiab resistor pins, txhawm rau cuam tshuam lub shunt ntawm tib neeg lub cev tsis kam, nce qhov yuam kev ~!
(2) Ntsuas tus nqi tiv thaiv rau hauv av
Qhov kev ntsuas qhov ntsuas hauv av, uas yog, tus cwj mem liab nrog lub ntsuas ntsuas hauv av, tus cwj mem dub txuas nrog ib qho ntawm cov ntsuas ntsuas, ntsuas qhov taw tes hauv qhov ntsuas hluav taws xob tiv thaiv rau hauv av, thiab tus nqi ib txwm tsis kam rau kev sib piv los txiav txim qhov thaj tsam ntawm qhov txhaum. Hauv kev ntsuas, qhov kev tiv thaiv qib yog teem rau ntawm R * 1k cov ntaub ntawv, thaum ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov sib piv nrog qhov sib txawv ib txwm yog qhov loj, qhia tau hais tias ib feem ntawm lub Circuit Court muaj qhov tsis ua haujlwm, xws li lim cua tawm, tsis kam qhib lossis kev sib xyaw IC kev puas tsuaj, thiab lwm yam ~
(3) Transistor ntsuas
Hloov qhov ntau ntawm cov multimeter rau ohms R * 100 lossis R * 1K cov ntaub ntawv los ntsuas lub diode. Tsis tuaj yeem siv cov ntaub ntawv R * 10, R * 10K. Qhov qub rau ob qho tib si kuj yog me me, qhov tsis kam yog loj dhau, qhov tam sim no los ntawm diode loj heev, yooj yim rau kev puas tsuaj rau diode, qhov tom kawg vim qhov hluav taws xob sab hauv yog siab dua, yooj yim tawg los ntawm diode nrog qis dua. hluav taws xob. Yog tias qhov ntsuas tsis kam tsuas yog ob peb puas ohms mus rau ob peb txhiab ohms (rau pem hauv ntej tsis kam), cov cwj mem liab thiab dub yuav tsum tau hloov thiab ntsuas, yog tias tsis ntsuas qhov ntsuas yuav tsum yog ob peb puas kilohms (rov qab tsis kam), qhia tias qhov diode tuaj yeem siv tau. Thaum ntsuas tus nqi ntawm kev tiv thaiv pem hauv ntej, tus cwj mem liab ntsuas ntawm qhov tsis zoo kawg ntawm lub diode, thiab tus cwj mem dub ntsuas ntawm qhov zoo kawg ntawm diode ~ (diode unidirectional conductive zog) ~ ~
Los ntawm kev ntsuas tus nqi rau pem hauv ntej thiab thim rov qab, koj tuaj yeem tshawb xyuas lub diode yog qhov zoo lossis qhov tsis zoo, feem ntau xav tau qhov rov qab ua haujlwm dua li qhov kev tiv thaiv pem hauv ntej hauv ob peb puas zaus. Qhov ntawd yog hais tias, qhov me me rau pem hauv ntej tsis kam, qhov zoo dua, qhov thim rov qab yog qhov loj dua qhov zoo dua ~ .
(4) AC voltage ntsuas
Peb tuaj yeem siv DC voltage iav thoob ntiaj teb thiab AC voltage iav los ntsuas lub hnub poob tam sim no thiab AC voltage tus nqi, feem, ces yog thaum lub multimeter thiab Circuit Court nyob rau hauv kev sim nyob rau hauv parallel kev twb kev txuas ntawm daim ntawv. Xaiv lub 'meter' taub hau pointer ze rau tag nrho cov nplai deflection 2/3 ntawm qhov ntau. Yog hais tias qhov luaj li cas ntawm qhov voltage ntawm lub Circuit Court tsis yog kwv yees, nws yog tsim nyog los siv ib tug loj ntau yam ua ntej, thiab ces siv qhov tsim nyog ntau yam tom qab ib tug abbreviated ntsuas, thiaj li yuav tiv thaiv kev puas tsuaj rau lub multimeter tawm ntawm qhov voltage siab dhau. Nyob rau hauv tsis muaj ntau npaum li cas ntawm DC voltage, lub multimeter yuav tsum yog tus cwj mem liab kov nyob rau hauv lub ntsuas hluav taws xob zoo ncej, thiab tus cwj mem dub kov rau qhov tsis zoo ncej ntawm lub Circuit Court, tsis tuaj yeem thim rov qab ~ hauv kev ntsuas qhov siab dua voltage yuav tsum xyuam xim tshwj xeeb. rau ob feem tuav tus cwj mem liab, xim dub txog ntawm ntug ntawm ib feem ntawm kev ntsuas, lossis thawj tus cwj mem yog tsau ntawm ib qho kawg, thiab tom qab ntawd kov rau qhov ntsuas qhov ntsuas ~
(5) Kev ntsuas qhov ntsuas hluav taws xob
Transformer tsis tuaj yeem energized nyob rau hauv cov ntaub ntawv ntawm ib tug multimeter nrog lub ohm ntaub ntawv ua ntej kwv yees ntawm ib lub qhov muag nws zoo thiab phem. Ua ntej, lub multimeter yuav raug xaiv nyob rau hauv R * 10 cov ntaub ntawv, ntsuas lub transformer thawj kauj coil DC kuj tus nqi, feem ntau nyob rau hauv ob peb puas ohms mus rau ob peb txhiab ohms, yog hais tias tus nqi ntsuas yog infinity, nws qhia tau hais tias lub kauj tau raug disconnected. , siv tsis tau!
Tom qab ntawd sim cov rwb thaiv tsev tiv thaiv ntawm lub hauv paus kauj thiab theem nrab kauj, yuav tsum yog qhov loj dua qhov zoo dua ~ Yog tias tus nqi tiv thaiv me me, nws txhais tau tias cov rwb thaiv tsev ntawm cov theem pib tsis zoo, thiab siv tsis tau ~ Cov kev ntsuas saum toj no, yog tias lawv yog cov zoo, koj tuaj yeem txuas lub transformer mus rau lub hwj chim mov los ntsuas qhov tso zis voltage tus nqi, nrog ib tug filtering Circuit Court ntawm transformer yuav tsum tau them sai sai mus rau lub liab thiab dub cwj mem yuav tsum tau muab tso rau kom raug rau qhov zoo thiab tsis zoo ncej ntawm lub voltage tso zis. davhlau ya nyob twg, yog hais tias qhov ntsuas qhov zis voltage yog qhov qub, qhia tias lub kauj tau raug txiav, siv tsis tau! Yog hais tias qhov ntsuas qhov tso zis voltage yog qhov qub, qhov kev ua haujlwm ntawm lub tshuab hluav taws xob yog qhov zoo.
