Yuav ua li cas siv digital multimeter los txiav txim qhov zoo ntawm cov capacitors
1. Kev kuaj xyuas cov capacitors me me hauv qab 10pF: Vim tias lub peev xwm ntawm cov capacitors ruaj khov hauv qab 10pF yog qhov tsawg dhau, kev ntsuas nrog lub tshuab hluav taws xob tsuas tuaj yeem kuaj xyuas seb puas muaj cov xau, sab hauv luv luv lossis tawg.
Thaum ntsuas, koj tuaj yeem xaiv R × 10k block ntawm multimeter, thiab siv ob qhov kev xeem ua rau txuas ob tus pins ntawm lub capacitor arbitrarily, thiab qhov kev tiv thaiv yuav tsum tsis muaj kawg. Yog tias qhov ntsuas ntsuas tus nqi (tus pointer viav vias mus rau sab xis) yog xoom, nws txhais tau hais tias lub capacitor puas los ntawm kev xau lossis kev puas tsuaj sab hauv.
2. Tshawb xyuas 10PF-001μF tsau capacitor: los ntawm kev txiav txim seb puas muaj qhov tshwm sim them, thiab tom qab ntawd txiav txim seb nws puas zoo lossis phem. Lub multimeter xaiv R × 1k thaiv. Qhov tseem ceeb ntawm ob triodes yog ob qho tib si saum toj 100, thiab qhov nkag mus tam sim no yuav tsum me me. 3DG6 thiab lwm hom silicon transistors tuaj yeem siv los ua cov raj sib xyaw.
Kev kuaj liab thiab dub ua rau ntawm lub multimeter yog feem txuas nrog lub emitter e thiab collector c ntawm cov raj sib xyaw. Vim lub amplification nyhuv ntawm composite triode, lub them thiab tso tawm txheej txheem ntawm lub ntsuas capacitor yog amplified, thiab lub pendulum ntawm tus pointer ntawm lub multimeter yog nce, uas yog yooj yim rau kev soj ntsuam.
Nws yuav tsum raug sau tseg tias thaum lub sijhawm ua haujlwm, tshwj xeeb tshaj yog thaum ntsuas lub capacitor nrog lub peev xwm me me, nws yog ib qho tsim nyog yuav tsum rov hloov cov pins ntawm lub capacitor nyob rau hauv qhov kev ntsuam xyuas kom kov cov ntsiab lus A thiab B, kom lub viav vias ntawm tus pointer ntawm multimeter. tuaj yeem pom meej.
Rau qhov ruaj khov capacitance saum 001μF, R × 10k block ntawm multimeter tuaj yeem siv los ntsuas ncaj qha seb lub capacitor puas muaj cov txheej txheem them nyiaj thiab seb puas muaj qhov luv luv hauv Circuit Court lossis xau, thiab lub peev xwm ntawm lub capacitor tuaj yeem kwv yees raws li cov khoom siv. amplitude ntawm tus pointer swinging mus rau sab xis.
Kev daws teeb meem:
1. Kev kuaj xyuas cov capacitors me me hauv qab 10pF: Vim tias lub peev xwm ntawm cov capacitors ruaj khov hauv qab 10pF yog qhov tsawg dhau, kev ntsuas nrog lub tshuab hluav taws xob tsuas tuaj yeem kuaj xyuas seb puas muaj cov xau, sab hauv luv luv lossis tawg.
Thaum ntsuas, koj tuaj yeem xaiv R × 10k block ntawm multimeter, thiab siv ob qhov kev xeem ua rau txuas ob tus pins ntawm lub capacitor arbitrarily, thiab qhov kev tiv thaiv yuav tsum tsis muaj kawg. Yog tias qhov ntsuas ntsuas tus nqi (tus pointer viav vias mus rau sab xis) yog xoom, nws txhais tau hais tias lub capacitor puas los ntawm kev xau lossis kev puas tsuaj sab hauv.
2. Tshawb xyuas 10PF-001μF tsau capacitor: los ntawm kev txiav txim seb puas muaj qhov tshwm sim them, thiab tom qab ntawd txiav txim seb nws puas zoo lossis phem. Lub multimeter xaiv R × 1k thaiv. Qhov tseem ceeb ntawm ob triodes yog ob qho tib si saum toj 100, thiab qhov nkag mus tam sim no yuav tsum me me. 3DG6 thiab lwm hom silicon transistors tuaj yeem siv los ua cov raj sib xyaw.
Kev kuaj liab thiab dub ua rau ntawm lub multimeter yog feem txuas nrog lub emitter e thiab collector c ntawm cov raj sib xyaw. Vim lub amplification nyhuv ntawm composite triode, lub them thiab tso tawm txheej txheem ntawm lub ntsuas capacitor yog amplified, thiab lub pendulum ntawm tus pointer ntawm lub multimeter yog nce, uas yog yooj yim rau kev soj ntsuam.
Nws yuav tsum raug sau tseg tias thaum lub sijhawm ua haujlwm, tshwj xeeb tshaj yog thaum ntsuas lub capacitor nrog lub peev xwm me me, nws yog ib qho tsim nyog yuav tsum rov hloov cov pins ntawm lub capacitor nyob rau hauv qhov kev ntsuam xyuas kom kov cov ntsiab lus A thiab B, kom lub viav vias ntawm tus pointer ntawm multimeter. tuaj yeem pom meej.
Rau qhov ruaj khov capacitance saum 001μF, R × 10k iav ntawm lub multimeter tuaj yeem siv los kuaj ncaj qha seb lub capacitor puas muaj cov txheej txheem them nyiaj thiab seb puas muaj qhov luv luv hauv Circuit Court lossis xau 1. Feem ntau ua txhaum ntawm lub capacitor. Thaum pom ib qho ntawm cov xwm txheej hauv qab no ntawm lub capacitor, cov khoom siv hluav taws xob yuav tsum raug txiav tam sim ntawd.
(1) Capacitor plhaub expansion lossis roj to.
(2) Lub casing yog tawg, thiab flashover tshwm sim nrog sparks.
(3) Lub suab txawv txav hauv lub capacitor.
(4) Qhov kub ntawm lub plhaub yog siab tshaj 55 degree thiab qhov ntsuas kub ntsuas nti poob.
2. Kev daws teeb meem ntawm cov capacitors
(1) Thaum lub capacitor tawg thiab ntes hluav taws, tam sim ntawd disconnect lub hwj huam mov, thiab siv xuab zeb thiab ib tug qhuav hluav taws tua hluav taws tua hluav taws.
(2) Thaum lub fuse ntawm lub capacitor yog cua tshuab, nws yuav tsum tau qhia rau tus dispatcher, thiab lub Circuit Court breaker ntawm lub capacitor yuav tsum tau qhib tom qab tau txais kev tso cai.
Txiav tawm lub hwj huam mov thiab tso tawm, ua ntej ua ib qho kev soj ntsuam sab nraud, xws li seb puas muaj ib qho flashover nyob rau sab nraud ntawm lub bushing, seb lub plhaub puas yog deformed, seb puas muaj roj to thiab seb puas muaj ib qho luv luv Circuit Court. grounding device, thiab lwm yam, thiab co lub rwb thaiv tsev tiv thaiv ntawm tus ncej thiab tus ncej mus rau hauv av Tus nqi, xyuas seb cov xaim ntawm lub txhab nyiaj capacitor puas ua tiav thiab ruaj khov, thiab seb puas muaj qhov tshwm sim ntawm theem poob. Yog tias tsis pom qhov tshwm sim txhaum cai, hloov daim ntawv pov hwm thiab muab tso rau hauv kev ua haujlwm.
Yog tias lub fuse tseem raug cua tshuab tom qab xa hluav taws xob, lub faulty capacitor yuav tsum tau muab tshem tawm, thiab lub zog xa mus rau lwm qhov yuav tsum rov pib dua. Yog hais tias lub Circuit Court breaker mus rau tib lub sij hawm thaum lub fuse tshuab, tsis txhob yuam nws nyob rau lub sij hawm no. Nws yuav tsum tau muab tso rau tom qab qhov kev tshuaj xyuas saum toj no ua tiav thiab kev pov hwm hloov pauv.
(3) Yog hais tias lub Circuit Court breaker ntawm lub capacitor mus txawv tebchaws, tab sis lub shunt kev tuav pov hwm tsis tawg, lub capacitor yuav tsum tau tso tawm rau peb feeb ua ntej mus xyuas lub Circuit Court breaker, tam sim no transformer, fais fab cable thiab capacitor sab nrauv.
Yog tias tsis pom qhov txawv txav, nws yuav tshwm sim los ntawm qhov hloov pauv ntawm lub tsheb npav sab nraud. Tom qab kuaj xyuas, koj tuaj yeem sim nrum; txwv tsis pub, koj yuav tsum tau ua ib qho kev ntsuam xyuas lub zog rau kev tiv thaiv. Los ntawm cov kev soj ntsuam thiab kev ntsuam xyuas saum toj no, yog tias qhov laj thawj tseem tsis tau pom, nws yog qhov yuav tsum tau ua raws li qhov system thiab maj mam sim lub capacitor. Tsis txhob sim mus pov npav kom txog thaum pom qhov laj thawj.
