Yuav ua li cas siv digital multimeter los ntsuas qhov zoo ntawm cov khoom hauv lub xeev relays
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 hloov cov pa relays nyob rau hauv lub tswj Circuit Court.
Ntawm lawv, ob lub terminals ntawm INPUT yog input terminals, uas txuas nrog tswj cov teeb liab, thiab ob lub terminals yog cov zis terminals, uas txuas nrog relays. Cov khoom hauv lub xeev tau muab faib ua DC thiab AC cov khoom hauv lub xeev relays raws li hom kev thauj khoom. Cov qub siv fais fab transistors li hloov cov ntsiab lus, thiab tom kawg siv bidirectional thyristors li hloov cov ntsiab lus.
Lub hauv paus ntsiab lus ntawm AC zero-crossing solid state relay. Lub npe hu ua xoom-crossing yog hais txog kev ua rau lub thyristor 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. Tsuav yog siv lub teeb liab tawm tswv yim hauv cheeb tsam no, SSR yuav raug qhib. Thaum lub hwj huam mov voltage ntau dua ± 25V, SSR yuav tsis raug qhib tam sim ntawd thaum lub teeb liab tawm tswv yim siv. Tsuas yog thaum lub hwj chim poob mus rau kauj ruam tom ntej Lub 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 lub davhlau ya nyob twg input. DC voltage qhia tias cov teeb liab tawm tswv yim yog qhov qub, thiab tom qab ntawd ntsuas seb puas muaj AC voltage ntawm qhov tso zis tawm. Yog tias muaj, nws txhais tau hais tias SSR yog qhov qub, yog tias tsis muaj lossis qhov hluav taws xob poob qis heev, nws txhais tau tias cov khoom hauv lub xeev relay puas lawm.
Siv lub diode iav ntawm cov digital multimeter los ntsuas qhov zoo thiab qhov tsis zoo ntawm ①, ②, ③, thiab ④ los ntawm cov ntaub ntawv xeem. Thaum cov hlau kuaj liab txuas nrog ① tus pin thiab cov hlau kuaj dub txuas nrog ② tus pin, cov khoom ntsuas tus nqi yog 1381 (1.381V), sib pauv cov kev xeem coj thaum ntsuas, lub ntsuas ntsuas pom cov cim hla " 1"; thaum cov hlau kuaj liab txuas nrog ④ tus pin thiab cov hlau kuaj dub txuas nrog ③, lub ntsuas hluav taws xob qhia tus nqi ntawm 543 (0.543V), thiab lub ntsuas hluav taws xob qhia cov cim hla "1" thaum cov kev xeem coj tau pauv; Hauv ntau lub xeev xeem, lub 'meter' yuav tso saib cov cim "1". Nws tsis yog qhov nyuaj los kos cov lus xaus los 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 Nws yog DC tso zis davhlau ya nyob twg, ③ tus pin yog tus ncej zoo, thiab ④ tus pin yog tus ncej tsis zoo. "0.543V" yog qhov hluav taws xob rau pem hauv ntej ntawm kev tiv thaiv diode txuas nrog nyob rau hauv tib lub sijhawm ntawm qhov tso zis tawm ntawm cov khoom hauv lub xeev relay. Nco ntsoov tias rau lub xeev ruaj khov relay yam tsis muaj kev tiv thaiv diode ntawm qhov tso zis kawg, txawm li cas los xij koj pauv qhov kev xeem ua rau ntsuas nws ③ thiab ④ pins, lub ntsuas ntsuas yuav tso saib cov cim "1". Thaum siv ntau hom digital multimeters los ntsuas lub teeb-emitting diodes ntawm solid-state relays, qee zaum cov khoom muaj nqis ntawm qee cov twj paj nruag tsuas yog flashes qhov kev nyeem ntawv ib ntus, thiab tom qab ntawd qhia txog cov cim "1". Kos qhov kev xeem xaus
