Yuav ua li cas siv digital multimeter los ntsuas qhov zoo ntawm cov khoom hauv lub xeev relays
Txheeb xyuas tus pins input thiab output thiab ntsuas qhov zoo. Nyob rau ntawm lub plhaub ntawm AC lub xeev relay, cov input terminals feem ntau yog cim nrog "ntxiv", "-" thiab "INPUT", thaum cov zis terminals tsis muab faib ua qhov zoo thiab qhov tsis zoo, tab sis qee cov khoom siv tau cim "LOAD". Rau DC cov khoom hauv lub xeev relays, cov tswv yim thiab cov khoom tso tawm feem ntau yog cim nrog "ntxiv" thiab "-", thiab qee cov khoom siv kuj tau cim nrog cov lus "IN" (input) thiab "OUT" (tso tawm) los qhia qhov txawv.
Thaum siv lub tshuab hluav taws xob digital los txheeb xyuas cov tswv yim thiab cov tswv yim, koj tuaj yeem siv cov ntaub ntawv diode los ntsuas cov lus qhia rau pem hauv ntej thiab rov qab ntawm plaub tus pins feem, thiab tus nqi hluav taws xob ntawm ib khub ntawm pins yuav tsum ntsuas raws li txoj cai. rau pem hauv ntej conduction thiab thim rov qab txiav tawm, uas yog, nws qhia "1.3 ~ 1.6V" thaum ntsuas nyob rau hauv pem hauv ntej kev taw qhia, thiab qhia lub overflow cim "1" thaum kuaj nyob rau hauv lub rov qab kev taw qhia. Raws li qhov no, nws tuaj yeem txiav txim siab tias ob tus pins no yog cov khoom siv hluav taws xob, thiab thaum ntsuas qhov zoo, qhov ntsuas ntawm "1.3 ~ 1.6V" tau tshwm sim, cov hlau kuaj liab txuas nrog tus ncej zoo, thiab cov xim dub. kuaj txhuas txuas nrog rau tus ncej tsis zoo. Rau DC solid-state relays, tom qab nrhiav tau lub input davhlau ya nyob twg, qhov zoo thiab tsis zoo ncej ntawm cov zis davhlau ya nyob twg yog feem ntau opposite rau ib leeg horizontally. Nws yuav tsum tau taw qhia tias qee qhov DC solid-state relays muaj kev tiv thaiv diodes ntawm lawv cov khoom siv hluav taws xob, cov ncej zoo ntawm lub raj tiv thaiv txuas nrog cov ncej tsis zoo ntawm cov khoom siv hauv lub xeev diode, thiab cov ncej tsis zoo ntawm lub raj tiv thaiv txuas nrog. mus rau tus ncej zoo ntawm lub solid-state relay. Ua tib zoo saib qhov tseeb qhov txawv thaum kuaj. Kev kuaj pom piv txwv: Cov cuab yeej nyob rau hauv kev sim yog JGTIFA DC khoom lub xeev relay. Nws cov zis yog paralleled nrog kev tiv thaiv diode.
Rau qhov yooj yim ntawm kev piav qhia, plaub tus pins ntawm lub cuab yeej raug cim raws li ①, ②, ③, thiab ④ raws. Thaum kuaj, thawj zaug paub qhov txawv ntawm ob tus pins ntawm cov tswv yim. Siv cov ntaub ntawv diode ntawm DT890A digital multimeter los ntsuas cov lus qhia rau pem hauv ntej thiab thim rov qab ntawm ①, ②, ③, thiab ④. Nws tuaj yeem pom los ntawm cov ntaub ntawv xeem uas thaum cov hlau kuaj liab txuas nrog ① tus pin thiab cov hlau kuaj dub txuas nrog ② tus pin, qhov ntsuas tus nqi yog 1381 (1.381V). Thaum txuas nrog ③, cov zaub tus nqi ntawm lub 'meter' yog 543 (0.543V). Thaum qhov kev xeem coj mus sib pauv rau kev ntsuas, lub ' meter ' qhia cov cim overflow "1"; nyob rau hauv lwm lub xeev kev xeem, lub ' meter ' qhia tau tias tus overflow cim "1".
Nws tsis yog qhov nyuaj rau kev txiav txim siab 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 lub teeb-emitting diode nyob rau hauv cov khoom lub xeev 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 tib lub sijhawm ntawm qhov tso zis tawm ntawm cov khoom hauv lub xeev 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 tus pins ③ thiab ④, lub 'meter' 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 cov lus xaus.
2. Tshawb xyuas lub peev xwm thauj khoom
(1) Siv lub diode iav ntawm digital multimeter, ua ntej ntsuas cov lus qhia rau pem hauv ntej thiab thim rov qab ntawm tus pins ① thiab ②, thiab lub ntsuas ntsuas yuav tso saib cov cim hla "1"; , Thaum cov hlau lead kuaj dub txuas nrog ④ tus pin, lub ntsuas hluav taws xob yuav tso tawm 1524 (1.524V), thiab thaum lub ntsuas hluav taws xob hloov pauv mus rau qhov ntsuas, lub ntsuas hluav taws xob yuav pom cov cim overflow "1", uas qhia tau tias ③ thiab ④ pins yog input terminals, ③ tus pin yog qhov zoo, thiab ④ tus pin tsis zoo. Lub ① thiab ② ko taw yog AC tso zis terminals ntawm lub cuab yeej nyob rau hauv kev sim.
(2) Siv lub DC5V tswj fais fab mov, teem lub digital multimeter mus rau 2kΩ kuj ntau yam los ntsuas qhov on-off kuj ntawm qhov tso zis davhlau ya nyob twg. Tom qab S1 raug kaw thiab siv rau, qhov ntsuas ntsuas tus nqi yog 1.343kΩ, qhia tias lub sab hauv bidirectional thyristor tau qhib, thiab lub load tuaj yeem tig rau lub sijhawm no. Thaum S1 raug txiav tawm, lub ntsuas ntsuas yuav tso tawm cov cim hla "1" (tus nqi tiv thaiv tsis kawg), qhia tias lub cuab yeej hauv kev sim raug muab tua, thiab lub nra tuaj yeem raug txiav tawm ntawm lub sijhawm no. Nco ntsoov tias nyob ntawm seb hom khoom ntawm lub xeev relay yuav tsum tau kuaj, qhov ntsuas ntawm lub xeev tsis kam ntawm cov zis davhlau ya nyob twg kuj txawv, thiab qhov ntau ntawm tus nqi kuj loj, qee qhov yog ob peb ohms, thiab qee qhov yog ob peb. txhiab ohms. Qhov kev tawm tsam ntawm lub xeev ntawm cov zis yog cuam tshuam nrog cov tswv yim tam sim no IS. Nyob rau hauv qhov ntau ntawm 10~ 20mA, qhov loj dua qhov input tam sim no IS, qhov me me ntawm lub xeev tsis kam. Tus nqi ntawm IS nyob ntawm qhov loj ntawm DC qhov hluav taws xob siv rau lub davhlau ya nyob twg input, tab sis tus nqi ntxiv ntawm cov khoom siv hluav taws xob yuav tsum tsis pub tshaj qhov ntsuas qhov ntsuas hluav taws xob ntawm lub cuab yeej hauv kev sim. Tsis tas li ntawd, yog tias qhov polarity ntawm DC voltage ntawm lub input davhlau ya nyob twg yog thim rov qab, cov khoom hauv lub xeev relay tsis tuaj yeem ua haujlwm li qub. Cov ntaub ntawv ntsig txog: Yuav ua li cas siv lub tshuab multimeter los ntsuas qhov zoo ntawm cov khoom siv hluav taws xob relay 1. Txhawm rau ntsuas qhov kev tiv thaiv kev tiv thaiv, siv cov ntaub ntawv tiv thaiv ntawm multimeter los ntsuas qhov tsis kam ntawm qhov ib txwm kaw thiab qhov taw tes txav. Tus nqi kuj yuav tsum yog 0; Lub point kuj yog infinite. Los ntawm qhov no, nws muaj peev xwm paub qhov txawv uas yog ib txwm kaw kev sib cuag thiab uas yog ib txwm qhib kev sib cuag.
2. Txhawm rau ntsuas cov coil tsis kam, siv lub multimeter R × 10Ω los ntsuas tus nqi ntawm cov relay coil, thiaj li txiav txim seb puas muaj qhov qhib Circuit Court hauv lub kauj.
3. Ntsuas qhov rub-hauv voltage thiab rub-nyob rau hauv tam sim no Nrhiav ib qho adjustable tswj fais fab mov thiab ammeter, input ib txheej ntawm voltages rau relay, thiab txuas ib ammeter nyob rau hauv series nyob rau hauv lub hwj chim mov Circuit Court rau saib xyuas. Maj mam nce lub hwj chim mov voltage, thiab sau cov rub-hauv voltage thiab rub-hauv tam sim no thaum hnov lub suab rub tawm ntawm relay. Rau qhov raug, koj tuaj yeem sim ob peb zaug thiab nrhiav tus nqi nruab nrab.
4. Kev ntsuas qhov tso tawm voltage thiab tso tawm tam sim no kuj txuas thiab sim raws li saum toj no. Thaum lub relay raug kaw, maj mam txo cov khoom siv hluav taws xob. Thaum koj hnov cov suab tso tawm ntawm lub relay dua, sau qhov voltage thiab tam sim no ntawm lub sijhawm no, thiab koj tuaj yeem sim tau qhov nruab nrab tso tawm voltage thiab tso tawm tam sim no ob peb zaug. Raws li ib txwm muaj, qhov tso tawm voltage ntawm relay yog li ntawm 10 ~ 50 feem pua ntawm cov rub-hauv voltage. Yog tias qhov hluav taws xob tso tawm tsawg dhau (tsawg dua 1/10 ntawm qhov hluav taws xob rub tawm), nws tsis tuaj yeem siv ib txwm, uas yuav ua rau muaj kev hem thawj rau kev ruaj ntseg ntawm Circuit Court. , ua haujlwm tsis ruaj khov.
