Kev Siv Khawv koob ntawm Multimeter txhawm rau txheeb xyuas cov khoom siv hluav taws xob
Cov khoom siv hluav taws xob hauv cov khoom siv hauv tsev siv ntau ntau yam ntawm cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob feem ntau yog los ntawm kev ua tsis tiav lossis kev puas tsuaj ntawm cov khoom siv hluav taws xob. Yog li ntawd, yuav ua li cas kom sai ntes cov khoom siv hluav taws xob yog qhov tseem ceeb tshwj xeeb. Niaj hnub no, Taopeitong yuav qhia rau koj yuav ua li cas siv ib tug multimeter kom sai sai nrhiav tau ntau yam hluav taws xob Cheebtsam, vam tias yuav muab kev pab rau feem ntau ntawm cov kws kho khoom siv hauv tsev.
1. Ntsuas qhov polarity ntawm txhua ceg ntawm tus choj rectifier
Xaiv qhov R × 1k ntau yam ntawm multimeter, txuas cov kev sim dub coj mus rau ib tus pin ntawm tus choj pawg, thiab ntsuas peb tus pins ntxiv ua tiav nrog cov ntawv xeem liab. Yog tias qhov kev nyeem ntawv yog tag nrho infinite, ces qhov kev ntsuam xyuas dub yog txuas nrog cov zis zoo ntawm tus choj pawg. Yog tias kev nyeem ntawv yog 4 ~ 10k, tom qab ntawd tus pin txuas nrog cov hlau lead dub yog qhov tso tawm tsis zoo ntawm tus choj pawg, thiab ob tus pins yog AC input terminals ntawm tus choj pawg.
2. Kev txiav txim seb tus siv lead ua oscillator yog qhov zoo lossis qhov tsis zoo
Ua ntej siv multimeter (R × 10k cov ntaub ntawv) los ntsuas tus nqi tiv thaiv ntawm ob qho kawg ntawm cov siv lead ua oscillator. Yog hais tias nws yog infinite, nws txhais tau hais tias cov siv lead ua oscillator tsis muaj luv luv Circuit Court los yog to; Tom qab ntawd ntxig tus cwj mem mus rau hauv lub mains jack, thiab tuav ib tus pin ntawm crystal oscillator nrog koj cov ntiv tes. Kov lwm tus pin mus rau qhov hlau nyob rau sab saum toj ntawm tus cwj mem xeem. Yog hais tias lub neon npuas ntawm lub xeem cwj mem yog liab, nws txhais tau hais tias siv lead ua oscillator yog zoo; Yog hais tias lub teeb neon tsis ci, nws txhais tau hais tias siv lead ua oscillator puas lawm.
3. Ib-txoj kev thyristor nrhiav kom tau
Lub thyristor muaj 3 PN junctions nyob rau hauv tag nrho, thiab peb tuaj yeem txiav txim seb nws puas yog qhov zoo lossis qhov tsis zoo los ntawm kev ntsuas qhov kev tiv thaiv rau pem hauv ntej thiab thim rov qab ntawm PN junction. Thaum ntsuas qhov kev tiv thaiv ntawm tus ncej tswj (G) thiab cathode (C), yog tias qhov kev tawm tsam rau pem hauv ntej thiab thim rov qab yog xoom lossis tsis kawg, nws qhia tau tias tus ncej tswj tau luv luv los yog txiav; ntsuas qhov tsis kam ntawm tus ncej tswj (G) thiab anode (A). Thaum ntsuas qhov tsis kam, qhov kev nyeem ntawv rau pem hauv ntej thiab rov qab yuav tsum loj heev; Thaum ntsuas qhov kev tawm tsam ntawm anode (A) thiab cathode (C), qhov kev tiv thaiv rau pem hauv ntej thiab rov qab yuav tsum loj heev.
R × 1K lossis R × 100 ntau yam ntawm multimeter tuaj yeem siv los ntsuas qhov kev tawm tsam rau pem hauv ntej thiab rov qab ntawm ob tus ncej. Yog tias qhov kev tiv thaiv ntawm ib khub ntawm electrodes pom tias tsis tshua muaj zog (100Ω-1kΩ), tom qab ntawd qhov kev kuaj dub txuas nrog Nws yog cov tswj electrode, cov hlau kuaj liab txuas nrog cathode, thiab lwm yam yog lub anode.
4. Polarity txheeb xyuas ntawm bidirectional thyristor
Lub bidirectional thyristor muaj lub ntsiab electrode 1, lub ntsiab electrode 2 thiab tswj ncej. Yog hais tias qhov kev tiv thaiv ntawm ob lub ntsiab electrodes yog ntsuas nrog ib tug multimeter R × 1k, qhov kev nyeem ntawv yuav tsum yog kwv yees li infinite, thiab qhov zoo thiab tsis zoo kuj ntawm tus tswj ncej thiab ib qho ntawm lub ntsiab electrodes Qhov kev nyeem ntawv kuj tsuas yog kaum tawm ohms. Raws li cov yam ntxwv no, peb tuaj yeem yooj yim txheeb xyuas tus ncej tswj ntawm bidirectional thyristor los ntawm kev ntsuas qhov tsis kam ntawm cov electrodes. Thaum cov hlau lead kuaj dub txuas nrog lub ntsiab electrode 1 thiab cov hlau kuaj liab txuas nrog cov electrode tswj, qhov ntsuas rau pem hauv ntej yog ib txwm me dua qhov rov qab tsis kam. Yog li, peb tuaj yeem txheeb xyuas lub ntsiab electrode 1 thiab lub ntsiab electrode los ntawm kev ntsuas qhov tsis kam. 2.
5. Xyuas seb lub luminous digital raj puas zoo lossis phem
Ua ntej teeb tsa lub multimeter rau R × 10k lossis R × 100k, tom qab ntawd txuas cov kev sim liab mus rau "hauv av" davhlau ya nyob twg ntawm cov raj digital (siv cov cathode digital tube ua piv txwv), thiab txuas cov kev sim dub coj mus rau lwm lub terminals. ntawm digital tube nyob rau hauv lem. Lawv yuav tsum tau teeb pom kev sib cais, txwv tsis pub lub raj digital puas lawm.
