Ungahlola kanjani ucingo oluphansi emotweni (umhlahlandlela onezithombe)

Okuqukethwe

Ungahlola kanjani ukumiswa kwemoto nge-multimeter
Hlola indlela yaphansi phakathi kwebhethri nesisekeli
Ikuphi ukufundwa kwe-multimeter okulungile ocingweni oluphansi?
Indlela yokusebenzisa i-multimeter ukuhlola impilo yezintambo eziphansi
Ukufingqa

Izinkinga eziningi zikagesi emotweni zingabangwa ukungahambi kahle phansi. Umhlabathi ongalungile ungabangela ukuthi iphampu yesibaseli kagesi ishise ngokweqile noma ibangele umsindo kusistimu yomsindo. Kungase futhi kuholele ekucindezelekeni okuphansi kanye nokungasebenzi kahle kohlelo lokulawula ugesi lwenjini.

Uma uhlangabezana nanoma iyiphi yalezi zinkinga, into yokuqala okufanele uyenze ukuhlola ukuxhumana okuphansi kwemoto yakho. Uzokwenza kanjani? Kulesi sihloko, sizohamba ezinyathelweni okudingeka uzilandele ukuze uhlole intambo yaphansi emotweni.

Ngokuvamile, ukuze uhlole intambo yaphansi emotweni, vula i-multimeter yakho bese ukhetha ama-ohms njengeyunithi yokulinganisa. Namathisela i-probe eyodwa kutheminali yebhethri enegethivu futhi enye kubhawodi yokuxhuma noma ithiphu yensimbi ofuna ukuyihlola. Imiphumela eseduze noziro isho isisekelo esihle.

Ungahlola kanjani ukumiswa kwemoto nge-multimeter

Kunombono oyiphutha ovamile phakathi kwabantu wokuthi isisetshenziswa simiswa lapho intambo yaphansi ithinta noma iyiphi ingxenye yemoto. Lokhu kukude neqiniso. Intambo yaphansi kufanele ixhunywe endaweni engenapende, enamathelayo noma engagqwalile. Uma ungaqiniseki ukuthi unesisekelo esihle yini, kungcono ukusihlola.

Ukwenza kanjani? Ukuze usebenze, udinga i-multimeter yedijithali. Nazi izinyathelo zendlela yokuhlola intambo yaphansi emotweni ene-multimeter.

Okokuqala: hlola insiza

Xhuma intambo yaphansi kuhlaka lwejeneretha ngqo.
Qinisekisa ukuthi akukho ukungcola phakathi kwendawo yokuhlala yekhompathimenti yenjini kanye nesiqalisi.

Okwesibili: hlola ukumelana

Setha idivayisi yemidiya yedijithali ukuthi ifunde ukumelana futhi uhlole ukuxhumana phakathi kwetheminali enegethivu kanye nesekhethi yaphansi yebhethri eyisekelayo.
Uma ukufundwa kungaphansi kuka-5 ohms, khona-ke unendawo ephephile.

Okwesithathu: hlola i-voltage

Nazi izinyathelo zokuhlola i-voltage:

Susa uxhumano futhi ulandele ngokucophelela izintambo
Vula i-iignity yemoto
Thatha i-multimeter yakho yedijithali bese uyiguqulela ku-DC volts.
Vula umlomo wombhobho bese uphinda indlela yaphansi njengenhla.
Okufanelekile, i-voltage akufanele ibe ngaphezu kuka-0.05 volts ngaphansi komthwalo.
Hlola noma yikuphi ukwehla kwamandla kagesi kunoma iyiphi indawo. Uma ubona noma iyiphi indawo yokwehla kwamandla kagesi, kufanele uthole iphoyinti elisha eliphansi noma wengeze intambo ye-jumper. Lokhu kuqinisekisa ukuthi awekho amaphuzu aphansi azokwehla futhi ngeke ube nentambo yaphansi embi.

Hlola indlela yaphansi phakathi kwebhethri nesisekeli

Qala ngetheminali yebhethri. Ukuze wenze lokhu, beka i-multimeter probe endaweni yokuqala, ngokuvamile i-fender.
Qhubeka nokunyakazisa i-DMM probe kuze kube yilapho iphiko lithinta umzimba omkhulu. Okulandelayo, sidlulela kwezinye izesekeli. Uma ubona noma iyiphi indawo enokumelana okuphezulu okungaphezu kuka-5 ohms, nqamula izingxenye noma amaphaneli ndawonye ngocingo noma itheyiphu yokuxhuma.

Ikuphi ukufundwa kwe-multimeter okulungile ocingweni oluphansi?

Ikhebula eliphansi lomsindo wemoto kufanele lifunde ukumelana no-0 ku-multimeter. Uma unendawo embi phakathi kwetheminali yebhethri nanoma iyiphi enye ingxenye yemoto, uzobona ukufundwa kokumelana okuphansi. Ingahluka kusuka kuma-ohm ambalwa kuye cishe ama-ohm ayishumi.

Uma ubona lesi sibonakaliso, kufanele ucabange ukuhlanza noma ukuqinisa ukujoyina ukuze kubhake kangcono. Lokhu kuqinisekisa ukuthi intambo yaphansi inokuxhumana okuqondile nensimbi engenalutho ngaphandle kokudweba. Kwezinye izimo ezingavamile, ungathola ukumelana kuze kufike ku-30 ohms noma ngisho nangaphezulu. (1)

Indlela yokusebenzisa i-multimeter ukuhlola impilo yezintambo eziphansi

Ngokuvamile, uma isistimu yakho yomsindo wemoto inesisekelo esibi, ngeke isebenze. Ukuze uhlole inkinga, uzodinga i-multimeter. Lokhu kukuvumela ukuthi uhlole amasekhethi aphansi ahlukahlukene kumafreyimu emoto.

I-multimeter yakho kufanele ikwazi ukukala ukumelana ngama-ohms. Kufanele kuqashelwe ukuthi inombolo izohluka kuye ngokuthi ukala kuphi isikhathi. Isibonelo, isixhumi sebhande lesihlalo sangemuva singase sibe phezulu, kodwa isilinda esivimbekile singase sibe phansi. Nansi indlela yokuhlola ukuxhumana okuphansi kwemoto nge-multimeter. (2)

Ngaphambi kokuqala ukuhlola, qiniseka ukuthi itheminali yebhethri enegethivu ixhunywe ebhethrini.

Vala noma imaphi amadivaysi emotweni angase adonse amandla amaningi ebhethri lemoto.
Setha i-multimeter yakho kububanzi be-ohm bese uxhuma enye yama-probe kutheminali yebhethri engalungile.
Beka i-probe yesibili lapho ufuna ukukala khona indawo ephansi.
Hlola amasayithi ahlukahlukene endaweni lapho une-amplifier.
Qopha isilinganiso ngasinye ukuze ubone ukuthi inhlabathi ngayinye inhle kangakanani.

Ukufingqa

Lokhu okuthunyelwe kubheke indlela yokuhlola ucingo oluphansi emotweni ngezindlela ezine. Uma usola ukuthi unendawo embi yezimoto, ukuhlolwa okugqanyiswe kulokhu okuthunyelwe kufanele futhi kukusize ukhombe indawo enenkinga.

Bheka ezinye zezihloko zethu ngezansi.