Yuav ua li cas siv digital multimeter los ntsuas qhov zoo ntawm solid-state relays raws li hauv qab no
Lub xeev relay yog hu ua SSR. Nws yog ib hom tshiab ntawm kev hloov tsis sib cuag nrog cov khoom siv hluav taws xob. Nws muaj cov yam ntxwv ntawm kev ua haujlwm txhim khu kev qha, kev hloov pauv ceev ceev thiab lub neej ntev. Nws tuaj yeem hloov cov pa relays hauv kev tswj circuits.
Ob lub terminals ntawm INPUT yog input terminals, txuas nrog tswj cov teeb liab, thiab lwm yam ob lub terminals yog cov zis terminals, txuas nrog relays. Solid-state relays tuaj yeem muab faib ua DC thiab AC solid-state relays raws li hom thauj khoom. Cov qub siv fais fab transistors li hloov cov ntsiab lus, thiab tom kawg siv triacs li hloov cov ntsiab lus.
Lub hauv paus ntsiab lus ntawm AC zero-crossing solid state relay. Lub npe hu ua xoom-hloov txhais tau hais tias lub thyristor tau tshwm sim thaum lub AC voltage yog xoom lossis tsuas yog hla xoom, uas tuaj yeem txo qhov cuam tshuam ntawm lub zog hluav taws xob thaum lub thyristor qhib. Feem ntau, xoom-hloov voltage txhais tau tias yog ± 25V. Nyob rau hauv cheeb tsam no, tsuav yog lub input teeb liab ntxiv, SSR yuav qhib. Thaum lub hwj chim mov voltage ntau dua ± 25V, SSR yuav tsis raug qhib tam sim ntawd thaum lub teeb liab tawm tswv yim ntxiv. Nws tsuas yog tos kom txog thaum lub hwj huam mov poob mus rau qhov hluav taws xob hla tom ntej. SSR tsuas yog qhib thaum nws nyob hauv cheeb tsam xoom.
Thaum kuaj pom SSR, koj tuaj yeem ntsuas seb puas muaj DC voltage ntawm cov khoom siv kawg. Lub xub ntiag ntawm DC voltage qhia tias lub teeb liab tawm tswv yim yog qhov qub, thiab tom qab ntawd ntsuas seb puas muaj AC voltage ntawm qhov tso zis kawg. Yog tias muaj, nws txhais tau tias SSR yog qhov qub. Yog tias tsis muaj ib qho lossis qhov poob qis heev, nws txhais tau tias cov khoom hauv lub xeev relay puas lawm.
Siv lub diode teeb tsa ntawm cov digital multimeter los ntsuas rau pem hauv ntej thiab thim rov qab ntawm ①, ②, ③, thiab ④. Raws li cov ntaub ntawv xeem, thaum cov hlau kuaj liab txuas nrog tus pin ① thiab cov hlau kuaj dub txuas nrog tus pin ②, lub ntsuas ntsuas qhia tus nqi ntawm 1381 (1.381V). Hloov cov kev xeem coj. Thaum lub sij hawm ntsuas, lub ' meter ' qhia txog cov cim overflow "1"; thaum cov hlau kuaj liab txuas nrog tus pin ④ thiab cov hlau kuaj dub txuas nrog tus pin ③, lub ntsuas ntsuas qhia tus nqi ntawm 543 (0.543V). Thaum qhov kev xeem coj mus sib pauv rau kev ntsuas, lub ' meter ' qhia cov cim overflow "1"; nyob rau hauv seem Nyob rau hauv ob peb lub xeev xeem, lub twj tso kua mis qhia lub overflow cim "1". Nws tsis yog qhov nyuaj los kos qhov xaus ntawm qhov no: ① thiab ② pins yog DC input terminals ntawm lub cuab yeej nyob rau hauv kev sim, ① tus pin yog tus ncej zoo, ② tus pin yog tus ncej tsis zoo, "1.381V" yog lub hauv ntej voltage poob ntawm lub teeb-emitting diode nyob rau hauv lub solid-state relay; ③, ④ pins yog DC tso zis davhlau ya nyob twg, tus pin ③ yog tus ncej zoo, tus pin ④ yog tus ncej tsis zoo, "0.543V" yog lub zog poob rau pem hauv ntej ntawm kev tiv thaiv diode txuas nrog tib lub sijhawm rau qhov tso zis tawm ntawm lub solid-state relay. Nco ntsoov tias rau cov khoom siv hauv lub xeev tsis muaj kev tiv thaiv diodes ntawm qhov kawg tso zis, txawm li cas los xij qhov kev xeem coj tau hloov pauv los ntsuas ③ thiab ④ pins, lub 'meter' yuav tso saib cov cim "1". Thaum siv ntau hom digital multimeters los ntsuas lub teeb-emitting diodes ntawm solid-state relays, cov zaub tus nqi ntawm ib co meters qee zaum tsuas flashes cov kev nyeem ntawv ib ntus, thiab tom qab ntawd qhia txog cov cim "1". Hauv qhov no, koj tuaj yeem rov pauv qhov kev xeem coj mus kuaj thiab sim ntau zaus kom txog thaum Draw test xaus
