Qhov ntsuas hluav taws xob ntsuas los ntawm analog multimeter siab dhau lawm
Qee lub sij hawm thaum peb ntsuas hluav taws xob circuits, vim qhov ntsuas mechanism ntawm lub multimeter, Circuit Court qauv, kev tiv thaiv sab hauv thiab lwm yam kev ntsuas qhov tseeb, qee zaum qhov ntsuas qhov tseeb yuav txo qis, qhov ua haujlwm zaus ntawm Circuit Court nyob rau hauv kev sim, kev ua haujlwm ntau zaus ntaus ntawv, thiab lwm yam. Cov yam ntxwv xws li cov duab kuj yuav ua rau kev ntsuas loj dua.
Yog li ntawd, kev ntsuas ntawm qee lub voj voog kuj tseem ceeb heev txog lub ntsuas. Feem ntau, thaum ntsuas qhov hluav taws xob ntawm lub voj voog, ib qho cuab yeej nrog lub siab sab hauv yuav tsum tau xaiv, uas tuaj yeem txo qhov shunting ntawm Circuit Court los ntawm qhov ntsuas. Thaum ntsuas qhov ntsuas hluav taws xob tam sim no, sim xaiv lub ntsuas hluav taws xob uas muaj qhov tsis kam sab hauv. Txawm li cas los xij, qhov kev tawm tsam sab hauv ntawm qhov ntsuas tsis tuaj yeem yog xoom. Yog li ntawd, tom qab lub ammeter txuas nrog nyob rau hauv series, lub internal kuj ntawm lub ntsuas yuav inevitably faib lub voltage ntawm lub Circuit Court. Qhov tshwm sim yog qhov parameter thaum lub sij hawm Circuit Court debugging thiab ua haujlwm. Tsis sib haum. Txhawm rau kom tsis txhob muaj qhov yuam kev uas tau hais los saum toj no, kev ntsuas tsis ncaj yog siv. Thaum ntsuas voltage, ntsuas tam sim no, thiab thaum ntsuas tam sim no, ntsuas qhov voltage. Thaum ntsuas qhov hluav taws xob, thawj zaug ntsuas qhov tsis kam ntawm cov resistor, thiab tom qab ntawd ntsuas qhov tam sim no ntawm lub voj voog, yog li indirectly tau txais qhov ntsuas voltage. Thaum ntsuas qhov hluav taws xob thaum ntsuas tam sim no, koj kuj yuav tsum ntsuas qhov tsis kam ntawm Circuit Court ua ntej thiab tom qab ntawd ntsuas qhov ntsuas hluav taws xob hla lub resistor kom tau txais qhov tseeb dua tam sim no. Tau kawg, cov txheej txheem no yuav tsum tau siv yooj yim, thiab kev txheeb xyuas Circuit Court kuj tseem ceeb heev, thiab nws yuav tsum ua raws li qhov tseeb.
Yog tias qhov ntsuas hluav taws xob ntsuas los ntawm analog multimeter siab dhau lawm, koj tuaj yeem sim qhib lub nraub qaum thiab pom cov calibration resistor ntawm lub taub hau ntsuas. Nws yog feem ntau yog ib qho adjustable resistor txuas nrog hauv series ntawm lub taub hau meter. Nyob rau tib lub sijhawm, nrhiav qhov zoo dua digital multimeter thiab kho nws kom pom tias nws ua haujlwm. Tsis tuaj yeem calibrate. Yog hais tias qhov sib txawv tsis loj, feem ntau nws tuaj yeem ntsuas tau.
Yog tias qhov sib txawv loj, siv lub ntsuas hluav taws xob los ntsuas qhov ntsuas hluav taws xob sib cais ntawm txhua lub iav kom pom tias ib qho twg tau raug kub hnyiab lossis hloov pauv tus nqi.
Yog tias tsis muaj, ces cov hairspring tej zaum yuav laus thiab poob nws lub zog. Qhov sib npaug quab yuam ntawm cov plaub hau yuav tsum tau hloov kho, uas yog qhov kev ntxhov siab ntawm cov xaim hluav taws xob thiab cov xaim qis thaum tus taw tes rov qab mus rau xoom. Qhov kev ntxhov siab ntau dua, qhov qis dua qhov rhiab heev ntawm lub 'meter', tab sis xoom rov qab yog ceev thiab raug. Qhov me dua qhov kev ntxhov siab, qhov siab dua ntawm lub 'meter', tab sis xoom rov pib ua haujlwm tsis zoo.
Nyob rau hauv qhov xwm txheej koj tau hais, yog tias tsis pom cov cim ntawm kev puas tsuaj, nws yuav tsum raug suav hais tias yog ib qho teeb meem nrog kev hloov ntawm hairspring ntawm lub taub hau meter.
Cov yam ntxwv uas cuam tshuam rau qhov tseeb ntawm qhov ntsuas qhov ntsuas hluav taws xob yog qhov ntsuas hluav taws xob faib hluav taws xob thiab qhov rhiab heev ntawm lub ntsuas hluav taws xob. Kev nyeem ntawv siab yog qhov tsis tshua muaj, feem ntau yog nyeem ntawv tsawg. Qhov no yog tshwm sim los ntawm qhov txo rhiab heev ntawm lub 'meter', attenuation ntawm cov hlau nplaum, thiab hlau pins nyob rau hauv qhov sib nqus sib nqus, uas tuaj yeem ua rau cov ntawv nyeem qis thiab daig pointers. Lub sijhawm no, koj tuaj yeem siv tus kheej nplaum nplaum los ntxuav tus pin hlau, thiab cov ntawv nyeem ib txwm tuaj yeem rov qab los.
Qhov kev tiv thaiv sab hauv ntawm multimeters tsis zoo ib yam, thiab qhov kev tso cai yuam kev yog +-0.2. Txhua tus neeg tsim khoom muaj nws lub tswv yim tsim. Lub analog multimeter tau pib thim tawm ntawm qib ntawm kev kho hluav taws xob. Nws tsuas yog hais tias analog multimeter yog intuitive thiab yooj yim, tab sis nws yog ntau inferior rau lub digital meter, thiab qhov tseeb yog ntau dua, vim hais tias txhua lub iav ntawm lub analog multimeter yog ua tiav los ntawm ib tug tswj Circuit Court ua los ntawm resistors los yog capacitors, diode, thiab transistors, thaum lub digital multimeter sib txawv nyob rau hauv uas nws yog tsim los ntawm digital Nws yog tsim los ntawm ib tug Circuit Court thiab ib lub rooj vag Circuit Court, yog li ntawd cov kev nyeem ntawv ntawm lub digital meter yog qhov tseeb dua. Raws li rau qhov siab voltage tso tawm, nws kuj tuaj yeem ntsuas nrog txoj kev no. Piv txwv li, los ntsuas 220 AC (qhia hauv AC), nws yog qhov tseeb dua los siv AC 1000V qib vim nws yog qhov tseeb dua. Nws cov kev tiv thaiv sab hauv yog qhov siab thiab ruaj khov, thiab nws muaj kev nyab xeeb dua rau multimeters. Nws kuj tseem yog MF47 multimeter tab sis nws qhov kev tiv thaiv sab hauv yog txawv. Nws tuaj yeem hais tias cov tswv yim tsim ntawm cov chaw tsim khoom yog tib yam, tab sis lawv zoo sib xws. Kev ntsuas DC ntau raws li cov qauv saum toj no. Piv txwv li, thaum ntsuas qhov tam sim no ncaj qha (qhia raws li DC) saum toj 36V, 250V DC ntau yog qhov tseeb tshaj plaws. Thaum ntsuas, koj yuav tsum ua raws li txoj cai, uas yog, thaum ntsuas ib qho nqi, koj yuav tsum siv qhov ntau yam tsawg kawg yog ob npaug ntawm qhov ntsuas tus nqi. Rau kev ntsuas, muaj ntau hom MF47 multimeters ua nyob rau hauv Nanjing. Lawv yog tsim los ntawm Jinchuan, Kehua thiab lwm yam manufacturers. Txawm li cas los xij, cov circuits zoo sib xws, thiab txhua tus muaj nws cov tswv yim tsim. Hauv qab no yog cov tsos ntawm ob meters. Rau cov neeg nyiam siv hluav taws xob, Cia peb sim, tab sis cov neeg nyiam siv hluav taws xob tshiab yuav tsum tau saib xyuas kev nyab xeeb thaum ntsuas qhov hluav taws xob siab (AC 220V).
