Yooj Yim Tsawg Kuaj Tester (Milliohmmeter): 5 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26

Yog tias koj xav paub qhov ua haujlwm ntawm cov khoom tiv taus qis xws li cov xov hlau, hloov pauv, thiab coils, koj tuaj yeem siv lub ntsuas milliohm no. Nws yog qhov yooj yim thiab pheej yig ua. Nws txawm haum hauv koj lub hnab ris. Feem ntau ohmmeters yog qhov tseeb mus rau 1 ohm, tab sis qhov no yog rhiab rau qhov tsis kam nyob hauv thaj tsam ntawm milliohms lossis txawm tias microohms.

Kauj ruam 1: Cov ntaub ntawv

R1: ~ 220-ohm resistor R2: Tsis paub tiv thaiv 2x cov xaim hluav taws xob (piv txwv li lub xov tooj hluav taws xob txuas) Lub voj voos zoo li lub thawv yas 5V qhov chaw (piv txwv li. USB chaw nres nkoj, them lub xov tooj txawb) 2x kab zauv clips DC nkaus thiab txuas (xaiv tau) Cov Kub Kub Kub Kov Multimeter nrog ohms thiab millivolts ranges (qis dua qhov ntsuas hluav taws xob, ntau dua qhov ntsuas milliohm meter) Tshuab xam zauv

Kauj Ruam 2: Laum Qhov ntawm Case

Laum cov qhov kom haum cov xov hlau thiab cov coj.

Kauj ruam 3: Soldering

Soldering tuaj yeem ua tau boardless. Cia li kub nplaum cov khoom rau hauv lub thawv. Yog tias koj lub zog siv hluav taws xob ntau thiab koj xav kom nws tshem tawm tau, suav nrog DC nkaus thiab txuas.

Kauj Ruam 4: Siv Milliohmmeter

Ua ntej ntsuas qhov tsis paub tsis kam, ntsuas qhov tsis kam ntawm R1. Nws yuav tsum nyob ze 220 ohms.

Txhawm rau ntsuas qhov tsis paub tsis kam (R2), xa nws mus rau lub milliohm meter qhov kev ntsuas ua. Ntsuas qhov ntsuas hluav taws xob hla R1 thiab R2. Thaum ntsuas R2 qhov hluav taws xob, ntsuas nws hla R2 ncaj qha. Tsis txhob ntsuas qhov ntsuas hluav taws xob hla tus kais dej vim tias kev tiv tauj tiv thaiv yuav ntxiv qhov poob qis thiab ua rau tsis muaj kev tiv thaiv ntau dhau.

Raws li Ohm txoj cai, peb paub tias R1 thiab R2 muaj vaj huam sib luag tam sim no ntws los ntawm lawv. Vim li no, peb tuaj yeem siv V2 thiab tam sim no los xam qhov tsis paub ua haujlwm.

R2 tuaj yeem xam raws li hauv qab no: R2 = V2/(V1/R1)

Qhov twg V1 = Voltage hla R1 V2 = Voltage hla qhov tsis paub resistor R1 = ntsuas tus nqi R1 (~ 220 ohms)

Hauv daim duab thib ob, Kuv siv ammeter ua piv txwv.

Qhov txuas no muaj cov ncauj lus kom ntxaws txog qhov ntsuas tsis kam tiv thaiv:

Kauj Ruam 5: Kev Ntsuas Ntawm Qhov Tsawg Ua Haujlwm

Raws li kev suav thiab cov txiaj ntsig xav tau, lub ntsuas milliohm no raug qhov tseeb.

Txij li thaum voltmeter muaj qhov nqes mus rau 0.1 mV, nws tuaj yeem ntsuas qis dua 0.01 ohm. Txhawm rau nce qhov rhiab heev, koj tuaj yeem yuav lub voltmeter rhiab ntau dua lossis siv tus nqi qis dua. Vim tias cov neeg tiv taus rhiab rau qhov hloov pauv kub, lub zog ntsuas yuav tsum siab dua.