Yuav ua li cas txheeb xyuas fuses nrog multimeter

Txheem

Yuav ua li cas xyuas seb lub fuse puas zoo?
Yuav ua li cas mus xyuas lub fuse thiab relay nrog ib tug multimeter?
tswv yim pom zoo

Hauv qab no kuv yuav qhia koj yuav ua li cas ntsuas lub fuse nrog multimeter. Koj kuj yuav tsum tau saib hauv lub fuse kom nkag mus rau hauv qab ntawm cov khoom thiab pom tias nws puas tau tawg. Kuv yuav qhia koj yuav ua li cas ua ob qho hauv qab no.

Cov kauj ruam tseem ceeb peb yuav dhau mus:

Muab qhov voltage ntawm lub fuse.
Kev ntsuas ohm
Txheeb xyuas cov fuses hauv lub thawv fuse
Fuse blown resistance ntsuas
Tshawb xyuas lub xeev tam sim no ntawm circuits

Yog tias koj muaj kev nyeem ntawv ntawm 0 - 5 ohms (ohms), lub fuse yog qhov zoo. Tus nqi siab dua txhais tau hais tias lub fuse tsis zoo lossis tsis raug. Yog tias koj nyeem OL (dhau txwv) nws yeej txhais tau tias lub tshuab hluav taws xob.

Yuav ua li cas mus xyuas nrog ib tug multimeter yog hais tias lub fuse yog tshuab?

Hauv qhov no, xyuas seb puas yog fuse tshuab los ntawm qhov muag kuaj tsuas yog yuav tsis txaus. Yog li ntawd, koj yuav tsum siv ib tug multimeter kom tshem tawm tag nrho cov tsis ntseeg.

Koj qhov thawj koom ruam zoo tshaj plaws yog ua qhov ntsuas hluav taws xob thiab xyuas seb qhov fuse yog dab tsi.

Ua ntej tshaj plaws, koj yuav tsum muaj kev txuas ntxiv ntawm koj lub multimeter. Feem ntau ntawm qhov zoo tshaj plaws multimeters tam sim no muaj hom kev siv no. Tom qab ntawd ib qho ntawm cov kev sojntsuam yuav tsum tau muab tso rau ntawm ib kawg ntawm lub fuse. Tau kawg, lwm qhov kev sojntsuam ntawm koj lub multimeter kuj yuav tsum tau muab tso rau ntawm lwm qhov kawg ntawm tib lub fuse.
Ntawm no lub hom phiaj tseem ceeb yog los txiav txim seb lub fuse puas zoo. Yog li, nyob rau hauv kev nruam hom, lub multimeter yuav tsum beep los qhia continuity.
Yog tias koj tuaj yeem tshawb xyuas qhov txuas ntxiv, lub fuse tsis tshuab. Hauv lwm lo lus, qhov no txhais tau tias tsis muaj kev sib txuas tsis raug lossis poob.
Ntawm qhov tsis sib xws, nws yuav tshwm sim tias lub multimeter qhia tau hais tias muaj kev tiv thaiv siab tsis muaj suab. Yog li, thaum qhov no tshwm sim, qhov laj thawj tseem ceeb yog tias lub fuse twb tau tshuab lawm thiab yog li tsis muaj txiaj ntsig.
Koj tuaj yeem siv lub multimeter ohmmeter yog tias nws tsis muaj qhov txuas ntxiv. Yog li, koj yuav tsum xaiv lub ohmmeter thiab muab txhua qhov waveform rau txhua qhov kawg ntawm lub fuse.
Yog tias lub fuse tsis zoo, qhov kev nyeem ntawv ohmmeter yuav tsum qis. Hloov pauv, kev nyeem ntawv yuav siab heev yog tias lub fuse puas lossis cua tshuab. (Lub fuse zoo yog tias nws qhov kev nyeem ntawv nyob nruab nrab ntawm 0 thiab 5 ohms (Ω).. Tus nqi siab dua txhais tau hais tias lub fuse tsis zoo lossis tsis zoo. Yog koj qhov kev nyeem ntawv yog OL (Tshaj qhov txwv), uas txhais tau tias lub tshuab cua tshuab.)

Yuav ua li cas xyuas seb lub fuse puas zoo?

Qhov no yog qhov kev kuaj xyuas kev noj qab haus huv ntawm lub fuse yuav tso cai rau koj kom tsis txhob muaj ntau yam tsis tau pom dua. Txawm li cas los xij, lub fuse zoo tsis yog ib txwm muaj, yog li koj yuav tsum paub yuav ua li cas txheeb xyuas qhov xwm txheej ntawm lub fuse. Koj tuaj yeem siv multimeter lossis koj tuaj yeem txiav txim siab tam sim ntawd yog tias lub fuse tau tawg tag.

Nrhiav lub tshuab cua tshuab tsis yog qhov nyuaj heev. Qee zaum lub ntsiab fuse connector melts lossis so.

Yog tias koj tsis tuaj yeem lav qhov no, koj tuaj yeem txuas ntxiv siv lub multimeter. Feem ntau, thaum lub tshuab hluav taws xob muaj qhov sib txuas tawg, tsis muaj dab tsi sab laug ua tab sis kho nws. Conversely, lub fuse yog OK yog hais tias lub internal connector tsis melted. Cov khoom txuas no yuav tsum nyob rau hauv qhov zoo ntawm ib sab ntawm lub fuse mus rau lwm qhov.

Pom tseeb nws yuav zoo dua yog tias koj muaj lub fuse tshiab los hloov lub tshuab cua. Tau kawg, muaj ntau lub fuses muaj nyob hauv khw. Yog li koj kuj yuav tsum tau ua kom paub tseeb tias lub fuse tshiab yog tib yam li qub.

Yuav ua li cas mus xyuas lub fuse thiab relay nrog ib tug multimeter?

Txhawm rau kuaj lub fuse nrog multimeter, koj yuav tsum siv hom kev txuas mus ntxiv ntawm multimeter.
Nws yuav zoo dua yog tias koj txuas multimeter ua rau txhua qhov kawg ntawm lub fuse. Yog tias koj tuaj yeem txiav txim siab txuas ntxiv ntawm multimeter, lub fuse yog qhov zoo. Conversely, nws yog ib lub tshuab fuse tshwj tsis yog tias koj pom kev txuas ntxiv hauv koj lub multimeter.
Ntawm qhov tod tes, koj tuaj yeem tshawb xyuas seb lub coil relay puas zoo lossis tsis zoo. Nws yuav zoo dua yog tias koj tseem muaj digital multimeter nrog xya lub luag haujlwm rau qhov no.
Hauv qhov no, nws yog ib qho tsim nyog yuav tsum siv hom kev tiv thaiv ntawm txhua tus ncej ntawm relay. Ntawm no qhov kev nyeem ntawv yuav tsum yog xoom hauv tus ncej ntawm txhua tus neeg sib cuag. (1)
Nyob rau tib lub sijhawm, cov neeg nyob hauv cheeb tsam no kuj tseem yuav raug kho raws li kev nyeem ntawv tsis kawg yog tias koj tso cov tshuaj ntsuam xyuas ntawm tus ncej tsim nyog. Tom qab ntawd koj tuaj yeem txuas ntxiv tom qab qhib lub relay. Koj yuav hnov ib tug nias thaum lub relay yog energized.
Tom qab ntawd koj yuav tau rov ua cov txheej txheem nrog ib tug multimeter. Ntawm no, qhov kev tiv thaiv ntawm kev qhib thiab kaw kev sib cuag yuav tsum tsim nyog. Koj tuaj yeem kuaj cov khoom hauv lub xeev relays nrog lub multimeter. (2)
Nyob rau hauv cov ntaub ntawv no, koj yuav tsum muaj ib tug diode nyeem ntawv los ntsuam xyuas hom relay no. Lub multimeter yuav qhia qhov voltage siv rau relay. Lub txee yuav qhia xoom lossis OL thaum lub relay tsis ua haujlwm.
Conversely, ib tug relay nyob rau hauv zoo yuav tsum muab ib tug tshwm sim ntawm 0.5 los yog 0.7, nyob ntawm seb hom relay.
Cov khoom hauv lub xeev feem ntau pheej yig dua thiab kho tau yooj yim dua.

Peb muaj lwm cov ntawv HOW-TO uas koj tuaj yeem tshawb xyuas thiab bookmark rau yav tom ntej siv. Nov yog qee qhov ntawm lawv: "Yuav ua li cas qhib lub amplifier nrog lub multimeter" thiab "Yuav ua li cas siv lub multimeter los xyuas qhov voltage ntawm cov nyob ntawm tej." Peb cia siab tias qhov kev qhia no yuav pab tau koj.