Ibhodi yePCB ngumqolo waso nasiphi na isixhobo sombane, iqonga apho amacandelo ombane axhonywe khona. Nangona kunjalo, ngaphandle kokubaluleka kwazo, ezi bhodi azikhuselekanga ekungaphumeleli okanye iziphene. Yiyo loo nto kubalulekile ukufunda ukuvavanya ngempumelelo iibhodi zePCB ngemultimeter. Kule bhlog, siza kuphonononga inkqubo yenyathelo ngenyathelo lokuvavanya ibhodi yePCB ukuqinisekisa umsebenzi wayo ofanelekileyo kunye nokuchonga iingxaki ezinokuthi zibekho.
Funda malunga nemultimeters:
Ngaphambi kokuntywila kwinkqubo yovavanyo, kubalulekile ukuba uqhelane nesixhobo esiza kusisebenzisa - i-multimeter. I-multimeter sisixhobo sombane esilinganisa imiba yombane eyahlukeneyo efana nombane, okwangoku, kunye nokuqhubeka. Iqulathe amacandelo ahlukeneyo aquka umboniso, ukhetho lokucofa, izibuko kunye neeprobe.
Inyathelo 1: Lungiselela uvavanyo
Qala ngokufumana i-multimeter esebenzayo kwaye uziqhelanise nemisebenzi yayo kunye noseto. Qinisekisa ukuba ibhodi PCB luqhawulwe kuwo nawuphi na umthombo wamandla ukuphepha umonakalo okanye ukwenzakala. Chonga amanqaku ahlukeneyo oza kuwavavanya ebhodini kwaye uqinisekise ukuba ayafikeleleka.
Inyathelo lesiBini: Vavanya iVoltage
Ukuvavanya i-voltage kwibhodi ye-PCB, nceda usethe i-multimeter kwimowudi yombane kwaye ukhethe uluhlu olufanelekileyo ngokombane olindelekileyo. Xhuma i-probe emnyama kwi-common (COM) port kunye neprobe ebomvu kwi-voltage (V) port. Chukumisa iprobe ebomvu kwiterminal evumayo yePCB kunye neprobe emnyama kwitheminali yomhlaba ukuqalisa ukuvavanya amandla ombane. Qaphela ukufundwa kwaye uphinde inkqubo kwamanye amanqaku afanelekileyo ebhodini.
Inyathelo lesi-3: Ukuqhubekeka kovavanyo
Uvavanyo oluqhubekayo lubalulekile ukuze kuqinisekiswe ukuba akukho zivula okanye zimfutshane zikhoyo kwi-PCB. Seta i-multimeter kwimowudi yokuqhubeka ngokujika umkhethi wokucofa ngokufanelekileyo. Qhagamshela i-probe emnyama kwizibuko le-COM kunye ne-probe ebomvu kwi-port ezinikeleyo yokuqhubeka kwi-multimeter. Chukumisa i-probes kunye kwaye uqiniseke ukuba uva i-beep ukuqinisekisa ukuqhubeka. Emva koko, bamba i-probe kwindawo oyifunayo kwi-PCB kwaye umamele i-beep. Ukuba akukho sandi, kukho isiphaluka esivulekileyo, esibonisa uxhulumaniso olungalunganga.
Inyathelo lesine: Vavanya ukuchasa
Uvavanyo resistors inceda ukuchonga naziphi na iziphazamiso okanye umonakalo kumacandelo esekethe kwibhodi PCB. Cwangcisa i-multimeter kwimowudi yokuchasa (ileta yesiGrike i-omega uphawu). Qhagamshela i-probe emnyama kwi-COM port kunye ne-probe ebomvu kwi-resistor port. Bamba iiprobe kunye kwaye ujonge ukuchasa ukufunda. Emva koko, bamba i-probes kwiingongoma ezahlukeneyo ebhodini kwaye uthelekise ufundo. Ukuba ufundo lutenxa kakhulu okanye lubonisa ukuxhathisa okungapheliyo, oko kubonisa ingxaki enokubakho kwisekethe yePCB.
Ukuvavanya ibhodi ye-PCB nge-multimeter linyathelo elibalulekileyo ekuqinisekiseni ukusebenza kwayo kunye nokuthembeka. Ngokulandela inkqubo yesinyathelo-nge-nyathelo echazwe kwesi sikhokelo, unokuvavanya ngokufanelekileyo i-voltage, ukuqhubeka, kunye nokuchasana kwibhodi yesiphaluka. Khumbula ukuba i-multimeter sisixhobo esisetyenziselwa izinto ezininzi, kwaye ukuqonda ukusebenza kwayo kubalulekile kuvavanyo oluchanekileyo. Uxhobe ngezi zakhono, ungalungisa iingxaki ngokuzithemba kwaye wenze ulungiso oluyimfuneko ukuze uqinisekise ukusebenza kakuhle kwebhodi yakho yePCB.
Ixesha lokuposa: Sep-06-2023