mokhoa oa ho lekola boto ea pcb ka multimeter

Boto ea PCB ke mokokotlo oa sesebelisoa leha e le sefe sa elektronike, sethala seo likarolo tsa motlakase li kenngoa ho sona. Leha ho le joalo, ho sa tsotellehe bohlokoa ba tsona, liboto tsena ha li sireletsehe ho hloleheng kapa mefokolo. Ke ka lebaka leo ho leng bohlokoa ho ithuta mokhoa oa ho lekola liboto tsa PCB ka multimeter. Ho blog ena, re tla hlahloba mohato ka mohato oa ho leka boto ea PCB ho netefatsa hore e sebetsa hantle le ho tseba mathata a ka bang teng.

Ithute ka li-multimeters:
Pele o kenella ts'ebetsong ea tlhahlobo, ho bohlokoa ho tseba lisebelisoa tseo re tla beng re li sebelisa - multimeter. Multimeter ke sesebelisoa sa elektroniki se lekanyang likarolo tse fapaneng tsa motlakase joalo ka voltage, hajoale, le tsoelopele. E na le likarolo tse fapaneng tse kenyelletsang ponts'o, daele ea khetho, likou le li-probes.

Mohato oa 1: Itokisetse tlhahlobo
Qala ka ho fumana multimeter e sebetsang le ho tloaelana le mesebetsi le litlhophiso tsa eona. Etsa bonnete ba hore boto ea PCB e hakotsoe mohloling ofe kapa ofe oa matla ho qoba tšenyo e ka bang teng kapa kotsi. Hlalosa lintlha tse fapaneng tseo u tla li leka botong 'me u netefatse hore lia fumaneha.

Mohato oa Bobeli: Lekola Voltage
Ho leka voltage ho boto ea PCB, ka kopo, seta multimeter ho mode ea voltage 'me u khethe mofuta o nepahetseng ho latela motlakase o lebelletsoeng. Hokela probe e ntšo boema-kepeng bo tloaelehileng (COM) le probe e khubelu boema-kepeng ba motlakase (V). Tobetsa probe e khubelu ho terminal e ntle ea PCB le phuputso e ntšo ho terminal ea fatše ho qala ho leka motlakase. Ela hloko ho bala 'me u phete mokhoa oa lintlha tse ling tsa bohlokoa botong.

Mohato oa 3: Tsoelo-pele ea Teko
Teko ea ho tsoelapele e bohlokoa ho netefatsa hore ha ho na li-opens kapa li-shorts tse teng ho PCB. Etsa hore multimeter e be mokhoa oa ho tsoela pele ka ho bulela khetho e nepahetseng. Hokela probe e ntšo boema-kepeng ba COM le probe e khubelu boema-kepeng bo inehetseng ba ho tsoela pele ho multimeter. Kopanya li-probes 'me u netefatse hore u utloa molumo oa molumo ho netefatsa ho tsoelapele. Ebe, ama probe ho ea sebakeng seo u se batlang ho PCB 'me u mamele beep. Haeba ho se na molumo, ho na le potoloho e bulehileng, e bontšang khokahanyo e fosahetseng.

Mohato oa Bone: Leka Khanyetso
Li-resistors tsa liteko li thusa ho tseba liphoso kapa tšenyo ea likarolo tsa potoloho ho boto ea PCB. Beha multimeter ho mokhoa oa ho hanyetsa (letšoao la Greek omega). Hokela probe e ntšo boema-kepeng ba COM le probe e khubelu boema-kepeng ba ho hanyetsa. Tšoara li-probes hammoho 'me u hlokomele ho bala ha khanyetso. Ebe, ama li-probe ho lintlha tse fapaneng ka boto ebe u bapisa tse baloang. Haeba 'malo o kheloha haholo kapa o bontša khanyetso e sa feleng, e bontša bothata bo ka bang teng ka potoloho ea PCB.

Ho lekola boto ea PCB ka multimeter ke mohato oa bohlokoa ho netefatsa ts'ebetso ea eona le ho ts'epahala. Ka ho latela mohato ka mohato o boletsoeng tataisong ena, u ka khona ho lekola matla a motlakase, ho tsoela pele le ho hanyetsa boto ea potoloho. Hopola hore multimeter ke sesebelisoa sa mesebetsi e mengata, 'me ho utloisisa ts'ebetso ea eona ho bohlokoa ho etsa tlhahlobo e nepahetseng. A hlometse ka litsebo tsena, u ka ka kholiseho ho rarolla mathata le ho etsa litokiso tse hlokahalang ho etsa bonnete ba tshebetso optimum ya hao PCB boto.