Multimeter pointer dabtsi yog khoov thiab lub taub hau kub tiv thaiv kev ntsuas
1) Ua ntej ntsuas, ntsuas qhov loj ntawm qhov ntsuas thiab teeb tsa qhov hloov pauv mus rau qhov tsim nyog.
Yog tias koj tsis paub meej txog qhov loj ntawm qhov ntsuas, koj tuaj yeem ua ntej teeb tsa qhov ntau ntawm cov iav siab tshaj plaws, thiab tom qab ntawd maj mam mus rau qhov tsim nyog cov iav.
Nco ntsoov tias thaum ntsuas cov khoom ntsuas loj nrog lub iav me me, nws muaj peev xwm khoov tus taw tes.
(2) Thaum ntsuas qhov tsis kam, lub voj voog nyob rau hauv kev sim yuav tsum tau txiav tawm ntawm lub hwj chim mov.
3) Nws yog txwv tsis pub tig qhov hloov pauv thaum ntsuas qhov hluav taws xob siab lossis siab tam sim no. Txhawm rau kom tsis txhob muaj kev sib cuag arc, kev puas tsuaj rau qhov hloov.
4) Thaum ntsuas electrolytic capacitors, luv-circuit lawv thiab tso tawm ua ntej ntsuas.
5) Thaum siv multimeter tsis raug, lub taub hau meter yuav raug hlawv.
Kev tiv thaiv kev tiv thaiv: Txuas ob lub silicon diodes nyob rau hauv parallel nrog qhov zoo thiab qhov tsis zoo ntawm lub taub hau 'meter' los tiv thaiv nws (ib qho rau pem hauv ntej, ib qho rov qab sib npaug).
Silicon diode ntawm qhov hluav taws xob feem ntau ntau dua {{0}}}.5V, qis dua 0.5V silicon diode rau pem hauv ntej kuj loj heev, tus thawj sab hauv tsis kam ntawm lub 'meter' lub taub hau muaj kev cuam tshuam me me, qhov tseem ceeb negligible.
Thaum kev ntsuas tsis raug, qhov hluav taws xob nce siab yuav ua rau silicon diode rau pem hauv ntej tsis kam txo, feem ntau ntawm cov tam sim no shunted los ntawm diode, ua lub luag haujlwm ntawm kev tiv thaiv lub taub hau meter.
Cov kev ceev faj
1>Kev ntsuas tam sim no thiab qhov hluav taws xob tsis tuaj yeem xaiv lub iav tsis raug. Yog tias koj yuam kev xaiv qhov tsis raug cai los yog cov iav tam sim no los ntsuas qhov voltage, nws yooj yim heev rau hlawv tawm lub 'meter'. Thaum lub multimeter tsis siv, nws yog qhov zoo tshaj rau tig lub iav mus rau qib siab tshaj plaws ntawm AC voltage kom tsis txhob muaj kev puas tsuaj vim kev siv tsis raug.
2>Thaum ntsuas tam sim no thiab voltage thiab DC tam sim no, xyuam xim rau "+" "-" polarity, tsis tuaj yeem txuas rau qhov tsis ncaj ncees lawm. Yog tias koj pom tias tus pointer pib thim rov qab, ob qho tib si yuav tsum tam sim ntawd hloov lub meter stick kom tsis txhob muaj kev puas tsuaj rau tus taw tes thiab lub taub hau meter.
3>Yog tias koj tsis paub qhov luaj li cas ntawm qhov ntsuas qhov ntsuas hluav taws xob lossis qhov tam sim no, koj yuav tsum siv qib siab tshaj plaws ua ntej, thiab tom qab ntawd xaiv cov qib tsim nyog los ntsuas, txhawm rau kom tsis txhob muaj ntau dhau ntawm rab koob thiab kev puas tsuaj rau lub taub hau meter. Qhov ze ntawm cov iav xaiv yog rau qhov ntsuas tus nqi, qhov tseeb dua qhov ntsuas tus nqi yuav yog.
4>Thaum ntsuas qhov kev tiv thaiv, tsis txhob kov qhov liab qab ntawm cov khoom (los yog cov hlau ntawm ob lub tuav) nrog koj txhais tes, kom tsis txhob muaj kev sib txuas ntawm tib neeg lub cev tiv thaiv thiab ntsuas qhov ntsuas, uas yuav ua rau kev ntsuas. qhov tshwm sim tsis raug.
5>Kev ntsuas kev tiv thaiv, xws li ob lub sticks luv luv, kho qhov "zero ohm" pob qhov rooj mus rau qhov siab tshaj plaws, tus pointer tseem tsis tau txog 0, qhov tshwm sim no feem ntau tshwm sim los ntawm qhov tsis txaus ntawm lub roj teeb hauv lub rooj yuav tsum. hloov nrog cov roj teeb tshiab tuaj yeem ntsuas qhov tseeb.
6>Thaum lub multimeter tsis siv, tsis txhob xaiv cov iav tiv thaiv, vim tias muaj cov roj teeb hauv, xws li kev ua yuam kev yooj yim ua rau ob lub pas nrig kov luv luv, tsis yog siv roj teeb nkaus xwb, thiab qhov xwm txheej hnyav, nws yuav ua rau puas tsuaj. lub taub hau meter.
