Digital multimeter kuj iav kuaj diode rau pem hauv ntej thiab thim rov qab tsis muaj nqi tsis kam
Cov multimeter yog qhov ntsuas tus nqi tiv thaiv los ntawm A / D converter nti yuav hloov pauv los ntawm cov cim analog rau cov cim digital los tso saib tus nqi tiv thaiv, pointer multimeter yog deflected los ntawm lub taub hau sib nqus thiaj li tso saib tus nqi, yog tias nyob rau hauv qhov tseeb ntsuas peb nrhiav cov digital multimeter resistance file test diode rau pem hauv ntej thiab thim rov qab yog tsis muaj nqi tiv thaiv, thaum siv lub pointer multimeter los kuaj lub diode rau pem hauv ntej nrog tus nqi tsis kam, muaj ntau yam laj thawj.
Diode ntsuas hauv Circuit Board
Ua ntej ntawm tag nrho cov, nyob rau hauv lub pointer multimeter thiab digital multimeter kuj cov ntaub ntawv tso zis voltage tsis zoo ib yam, lub dav pointer multimeter nws outputs lub siab tshaj plaws voltage yog 9 volts, thaum lub multimeter digital yog feem ntau qhov siab tshaj plaws tso zis voltage yog 3 volts, tib yam. lub sij hawm tsis tsuas yog lawv cov zis voltage tsis zoo ib yam, peb xaiv ib tug sib txawv iav nyob rau hauv lub ntsuas, cov zis voltage tsis zoo li qub, cov multimeter cov zis voltage ntawm 1.0 volts rau 3.0 volts muaj. Cov zis voltage ntawm digital multimeter yog los ntawm 1.0 volt mus rau 3.0 volt, thiab cov zis voltage ntawm nws cov ntaub ntawv tsis kam yog feem ntau siab dua li ntawm cov multimeter. Cov zis voltage ntawm pointer multimeter yog ntau dua qhov voltage poob ntawm diode, thiab lub diode muaj peev xwm ua tau, thaum lub digital multimeter yog qee zaum me dua qhov voltage poob ntawm diode, uas ua rau lub diode tsis tuaj yeem ua, thiab Qhov no yuav ua rau kev ntsuas ntawm diode nyob rau pem hauv ntej thiab rov qab tsis kam yog infinite.
Qhov thib ob, cov yam ntxwv ntawm qhov poob qis ntawm lub raj thib ob tsis zoo ib yam, kuj tseem yuav ua rau peb xaiv cov ntaub ntawv pointer multimeter tiv thaiv los ntsuas lub raj thib ob nrog lub digital multimeter los ntsuas cov txiaj ntsig ntawm lub raj thib ob muaj qhov tsis zoo, piv txwv li: silicon tube thiab germanium raj dav dav voltage poob tus nqi ntawm {{0}}}.3 volts rau 0.6 volts, tab sis qee qhov tshwj xeeb cov tub ntxhais kawm theem nrab, xws li high-voltage diodes, cov conduction voltage poob yog qhov loj feem ntau mus txog 0.7 volts los yog ntau tshaj, thiab peb cov digital multimeter Resistance file voltage yog tsawg, thiab tsis tuaj yeem yog diode conduction, yog li kev ntsuas yuav ua rau tus nqi kuj yuav tshwm sim infinite.
Peb siv cov digital multimeter los ntsuas lub diode yog qhov zoo lossis qhov tsis zoo, qhov kev xaiv zoo tshaj plaws ntawm diode iav, digital multimeter diode iav feem ntau yog nyob rau hauv 2.6 volts los yog li ntawd, feem ntau ntau dua li lub diode rau pem hauv ntej voltage poob, lub diode tuaj yeem ua rau pem hauv ntej. kev taw qhia.
Yog tias peb xav ntsuas lub diode nrog cov ntaub ntawv tiv thaiv seb puas muaj qhov xau, peb tuaj yeem xaiv cov ntaub ntawv digital multimeter tsis kam, lub sijhawm no cov txiaj ntsig yuav tsum yog tom ntej ntsuas kev tiv thaiv, rov qab ntsuas qhov tsis kam mus rau infinity, pointer multimeter ntsuas cov txiaj ntsig zoo ib yam. , yog tias qhov ntsuas pom tias muaj kev tiv thaiv nyob rau hauv qhov kev taw qhia rov qab, ua pov thawj tias lub diode thim rov qab tuaj yeem ua tau, qhov twg peb yuav tsum tau siv cov cuab yeej tshwj xeeb los kuaj xyuas, siv multimeter los ntsuas qhov diode no seb puas muaj cov xau. tsis yog lawm.
