Yuav ua li cas paub qhov txawv iav ntawm lub multimeter? Multimeter ntau yam hloov pauv hloov siv
Peb lub luag haujlwm tseem ceeb ntawm multimeter yog ntsuas qhov ua haujlwm, qhov hluav taws xob, thiab tam sim no, yog li cov neeg laus hu ua peb lub hom phiaj ntsuas.
Ntau lub zog tshiab tau ntxiv rau tam sim no multimeter, tshwj xeeb tshaj yog digital multimeter, xws li ntsuas tus nqi capacitance, transistor magnification, diode voltage poob, thiab lwm yam. Kuj tseem muaj kev hais lus digital multimeter uas tuaj yeem tshaj tawm cov txiaj ntsig ntsuas hauv hom lus. Kuj tseem muaj ntau cov qauv classic ntawm digital multimeters
Cov lus hauv qab no qhia qhov txawv ntawm kev ua haujlwm. Ntawm lawv, multimeter tau yuav ntau dua 30 yuan, uas pheej yig txaus.
Qhov loj tshaj feature ntawm lub multimeter yog tias muaj ntau yam hloov pauv, thiab txhua txoj haujlwm yog hloov los ntawm qhov hloov pauv no. Yeej, A- yog siv los sawv cev rau qhov ntsuas DC tam sim no, thiab feem ntau muaj ntau theem rau cov milliampere thiab ampere theem. V- txhais tau tias ntsuas DC voltage. Advanced multimeters muaj millivolt ranges, thiab voltage ranges kuj muab faib ua ntau yam. V ~ yog siv los ntsuas AC voltage. A ~ Ntsuas AC tam sim no.
Siv cov ntaub ntawv Ω ohm los ntsuas qhov tsis kam. Rau lub pointer multimeter, koj yuav tsum ua qhov xoom hloov txhua zaus koj hloov cov ntaub ntawv tiv thaiv. Kev hloov kho xoom yog muab tso rau qhov kev sim liab liab thiab cov tshuaj ntsuam dub ntawm cov multimeter ua ke.
ua ke, thiab tom qab ntawd tig lub pob qhov hloov kho xoom kom tus pointer taw qhia mus rau xoom txoj hauj lwm. hFE yog siv los ntsuas qhov tam sim no amplification yam ntawm lub triode, ntev li ntev raws li peb tus pins ntawm lub triode tau muab tso rau hauv cov sib thooj qhov ntawm lub universal nto board, tus nqi hFE yuav ntsuas tau. Nco ntsoov tias PNP thiab NPN txawv.
Cov nram qab no yuav siv MF30 multimeter ua piv txwv los qhia txog kev nyeem ntawv ntawm multimeter. Thawj kab kab yog qhov qhia txog tus nqi tiv thaiv, sab laug kawg yog infinity, txoj cai kawg yog xoom, thiab qhov nruab nrab nplai tsis sib npaug. Cov ntaub ntawv tiv thaiv muaj xws li R × 1, R × 10, R × 100, R × 1K, R × 10K, raws li piav qhia txog qhov sib npaug kom tau muab faib los ntawm qhov taw qhia ntawm qhov ntsuas kom tau txais qhov tseeb tus nqi (hauv ohms).
Piv txwv li, yog tias koj ntsuas qhov tsis kam nrog R × 100 iav, thiab lub pointer qhia tias "10", ces nws tus nqi kuj yog 10 × 100=1000, uas yog 1K.
Cov kab thib ob yog sib koom los ntawm 500V ntau thiab 500mA ntau. Nws yuav tsum tau muab sau tseg tias lub hauv paus ntsiab lus qhia txog qhov voltage ntau thiab qhov tam sim no ntau yam txawv ntawm qhov kev tiv thaiv ntau yam. Yog tias qhov tam sim no tshaj qhov ntau, nws yuav ua rau lub multimeter puas.
Lub iav ntawm lub multimeter yog ntsuas qhov conduction voltage poob ntawm lub diode, thiab nws tseem tuaj yeem ntsuas qhov txuas ntxiv ntawm lub voj voog.
Yuav siv li cas: Xaiv cov iav no nrog lub qhov hloov pauv, ntxig cov hlau lead hauv qhov tsis siv tam sim no, kov ob lub pins ntawm lub diode lossis lub ntsuas hluav taws xob ntsuas hluav taws xob nrog cov ntsuas hluav taws xob, yog tias lub Circuit Court txuas nrog, lub buzzer yuav suab. , yog tias qhov kev ntsuam xyuas yog diode, Ib qho kev taw qhia yuav pom txog 0.7V, uas yog rau pem hauv ntej voltage poob ntawm lub diode, thiab lwm yam kev taw qhia yuav tso saib cov cim overflow, qhia tias tsis yog-conduction.
Tsis tas li ntawd, cov iav no tuaj yeem ntsuas lub teeb-emitting diodes.
