Izimpawu ze-Multimeter: Umhlahlandlela Ophelele Wochwepheshe Wokuqonda nokusebenzisa I-Multimeter Yakho Yedijithali

Isingeniso

Izimpawu zamamitha amaningi zakha ulimi lomhlaba wonke phakathi kochwepheshe bezinto zikagesi kanye nethuluzi labo lokuxilonga elibaluleke kakhulu. Ukuthi ukuxazulula inkinga kwamabhodi esekethe ekukhiqizeni noma ekulungiseni insimu, ukuhumusha ngendlela efanele lezi zimpawu kuvimbela amaphutha okulinganisa, ukulimala kwemishini, nobungozi bokuphepha.

Lo mhlahlandlela unikeza isisekelo sobuchwepheshe esidingekayo sokufunda nokusebenzisa izimpawu ze-multimeter ngokuzethemba ekuhlolweni kwamandla kagesi e-DC, ukulinganisa kwe-AC, ukuqapha kwamanje, kanye nokuqinisekiswa kokuqhubeka. Kwa- Highleap Electronics , amaqembu ethu omhlangano we-PCB athembele ekufundweni kwe-multimeter okunembile nsuku zonke, futhi ulwazi lwezimpawu luhlala luyisisekelo sokuqinisekiswa kwekhwalithi.

Ukuqonda Izingxenye Eziyinhloko ze-Multimeter kanye Nemisebenzi Eyisisekelo

I-multimeter yedijithali ikala i-voltage (V), yamanje (A), ukumelana (Ω), futhi yenza izivivinyo ezikhethekile ezihlanganisa ukuqhubeka nokuhlola i-diode. Ithuluzi liqukethe isibonisi sedijithali, amamodi okulawula ukudayela kwesikhethi somsebenzi, ojeke bokufaka abanelebula ukuthi COM (indawo evamile), i-VΩ (i-voltage nokumelana), namajekhi amanje ahlukanisayo kububanzi obuhlukahlukene be-amperage. Ama-probe okuhlola axhuma i-multimeter kumasekhethi, i-probe emnyama ihlale ixhumeka ku-COM kanye ne-probe ebomvu kujeke wokulinganisa ofanele ngokusekelwe kuzimpawu zamamitha amaningi akhethiwe.

Izimpawu Ezibalulekile Ze-Multimeter Isithenjwa Esisheshayo

Amaphuzu Okudideka Ophawu Lwe-Multimeter Ejwayelekile

Uphawu lwe-V~ lubonisa amandla kagesi e-AC kuyilapho i-V⎓ imelela amandla kagesi e-DC—ukusebenzisa isilungiselelo esingalungile kuveza ukufundwa okunganembile. Izilinganiso zamanje zidinga uxhumano lochungechunge ngesekhethi, ngokungafani nezilinganiso ze-voltage ezixhuma ngokuhambisana. Ukweqa isilinganiso se-amperage kujack enikeziwe kuzophephetha i-fuse yangaphakathi. Njalo xhuma i-probe emnyama ku-COM kungakhathalekile ukuthi usebenzisa ziphi izimpawu ze-multimeter.

I-DC Voltage Measurement enezimpawu ze-Multimeter

Ukuqonda Uphawu lwe-V⎓

Uphawu lukagesi lwe-DC luvela njengo-V ngomugqa oqondile kanye nomugqa wedeshi ngaphansi (V⎓) noma njengo-V enophawu lokususa (V—). Lolu phawu lwe-multimeter lukala i-voltage yesimo esingaguquki kumadivayisi asebenza ngebhethri, izinsiza zikagesi, namasekhethi edijithali. Xhuma ama-probe okuhlola ngokuhambisana kuwo wonke umthombo wamandla kagesi—i-probe eqondile ibe namandla aphezulu kanye ne-negative probe emhlabathini. Khetha ububanzi be-voltage ngaphezu kokufundwa okulindelekile; ukuqala ngokulondoloza kuvimbela ukugcwala. Uma uhlola ibhethri le-9V, setha ukudayela kububanzi obungu-20V DC futhi ufunde inani elibonisiwe.

Amaphutha Abalulekile Okulinganisa Kwe-DC

Ukusetha imitha kumodi yamanje kudala isifunda esifushane esiyingozi. Ukukhetha imodi kagesi ye-AC emithonjeni ye-DC kukhiqiza ukufunda okungaqondakali. Lokhu kuhunyushwa ngokungalungile kwezimpawu zamamitha amaningi kumelela amaphutha omqhubi ajwayelekile kakhulu ezindaweni zokukhiqiza.

Ukuhlolwa kwe-AC Voltage Ukusebenzisa Izimpawu ze-Multimeter

I-V~ Symbol yezilinganiso ze-AC

Uphawu lukagesi lwe-AC luboniswa njengo-V ngomugqa we-wavy (V~), okubonisa amandla okulinganisa amanje ashintshanayo. Lolu phawu lwe-multimeter lukala amasistimu kagesi asendlini, ama-transformer, nezinto zikagesi ze-AC. Amathuluzi ekhwalithi abala amanani eqiniso e-RMS, anikeze ukufundwa okunembile kwamagagasi angewona ama-sinusoidal. Setha ububanzi ukuze buhambisane nomthamo ophezulu olindelekile, ngokuvamile ongu-200V noma u-750V AC womsebenzi wendawo yokuhlala.

Izidingo zokuphepha zokuhlolwa kwe-AC Voltage

Lapho uhlola amandla kagesi amakhulu usebenzisa izimpawu ze-multimeter ye-AC, qinisekisa ukuthi insimbi yakho inezilinganiso ezifanele zokuphepha ze-CAT:

• Isilinganiso se-CAT II - Ama-elekthronikhi nezinto eziphathwayo ezifika ku-300V
• Isilinganiso se-CAT III - Amaphaneli okusabalalisa nokufakwa okungaguquki kufika ku-600V
• Isilinganiso se-CAT IV - Isevisi yokungena yesevisi kanye nemigqa ephezulu efinyelela ku-600V
• Ama-insulated probes - Sebenzisa ama-probes alinganiselwe amandla aphezulu alindelwe ngonogada beminwe
• Iphrothokholi yesekethe ebukhoma - Cabanga ukuthi wonke amasekethe anamandla kuze kube yilapho kufakazelwa ngenye indlela

Isilinganiso samanje esinezimpawu ze-Multimeter

Indlela Yokuxhuma Yochungechunge Yezimpawu A~ kanye ne-A⎓

Izimpawu zamanje zivela njenge-A~ ye-AC yamanje noma i-A⎓ ye-DC yamanje, enezindawo ezihlukene zojeke kububanzi obuhlukahlukene. Ngokungafani nezilinganiso ze-voltage, ukuhlola kwamanje kudinga ukuphula isifunda nokufaka imitha ochungechungeni nomthwalo. Hambisa i-probe ebomvu usuka kujeke we-VΩ uye kujekhi ye-mA (imvamisa kuma-currents angaphansi kuka-200mA) noma ijekhi engu-10A ukuze uthole amaza aphezulu. Isekhethi yamanje igeleza ku-resistor yangaphakathi yemitha ye-shunt.

Izingozi Zamanje Zokulinganisa Nokuvikelwa Kwe-Fuse

Amamitha amaningi anamafuse amabili ahlukene avikela ububanzi be-mA no-10A; ujeke we-10A uvamise ukuntula ukuvikelwa kwe-fuse kumamodeli angabizi kakhulu. Ukuze ulinganise okwamanje ngokuphephile, nqamula uhlangothi olulodwa lomthwalo, xhuma imitha phakathi kwamaphoyinti anqanyuliwe nge-polarity elungile, bese ubheka ukufundwa. Kuzinhlelo zokusebenza zamanje noma izindawo zokulinganisa ezingalungile, amamitha okubamba ahlinzeka ngezinye izindlela eziphephile ngokulinganisa izizinda kazibuthe ezizungeze amakhondakta ngaphandle kokuphula amasekhethi.

Ukuphikiswa nokuqhubeka kwezimpawu ze-Multimeter

I-Omega Symbol (Ω) Yokuhlola Ukumelana

Uphawu lwe-omega lubonisa imodi yokulinganisa ukumelana, esetshenziselwa ukuqinisekisa amanani engxenye, ukuthola okuvulekayo, nokuhlola ubuqotho bomqhubi. Njalo khipha amandla amasekhethi ngokuphelele ngaphambi kokuhlolwa kokumelana; I-voltage ekhona ngesikhathi sokulinganisa ilimaza imitha futhi ikhiqize ukufundwa okungamanga. Susa okungenani ingxenye eyodwa yokuhola ebhodini lesekethe ukuze uqede izindlela zokumelana ezihambisanayo ezifaka engozini ukunemba. I-Thinta iphenya ngokuqinile ezingxenyeni zokuhola futhi ufunde inani elibonisiwe.

Ukuhlola Ukuqhubeka Nge-Beeper Symbol

Uphawu lokuqhubeka lubonisa isithonjana sesipikha esinamagagasi omsindo ())) noma i-diode enamagagasi (►))), ekhiqiza ibhiphu ezwakalayo lapho ukumelana kwehla ngaphansi cishe kuka-30-50 ohms. Lolu phawu lwe-multimeter luhlonza ngokushesha amasekhethi amafushane, luqinisekisa ubuqotho bekhebula, futhi luqinisekisa ukusebenza kokushintsha ngaphandle kokubuka isibonisi. Zombili izindlela zokumelana nezokuqhubeka zijova amaza okuhlola amancane, ngakho azikwazi ukusebenza ngamandla asetshenzisiwe.

I-Diode ne-LED Testing Multimeter Symbols

Uphawu lwe-diode (▶|—) lumelela imodi yokuhlola ekhethekile elinganisa ukwehla kwamandla kagesi ukuya phambili kuwo wonke amajunction we-semiconductor. Imitha isebenza cishe ku-2-3V ngokusebenzisa isikhali esikhawulelayo samanje ukuze siye phambili-sicheme ukuhlangana. I-silicon diode enhle ngokuvamile ibonisa u-0.5-0.7V ngokuchema phambili kanye ne-"OL" (ukulayisha ngokweqile) ngokuchema okuhlanekezelwe. Ama-LED adinga i-voltage eya phambili ephakeme—ama-LED abomvu eduze no-1.8V, kuyilapho ama-LED aluhlaza namhlophe ekala u-3.0-3.5V. Ukuhlola zombili izikhombisi-ndlela kuqinisekisa ukuziphatha okufanele kwe-junction; ukufundwa okufanayo kuzo zombili i-polarity kubonisa i-diode emfushane, kuyilapho i-“OL” kuzo zombili izinkomba iphakamisa ukuhlangana okuvulekile.

Izimpawu ze-Multimeter Ezithuthukisiwe: Amandla, Imvamisa, kanye Nezinga lokushisa

Ama-multimeters acaciswe kakhulu ahlanganisa amandla okulinganisa angaphezu kwamapharamitha kagesi ayisisekelo.

• The uphawu lwe-capacitance (—||—) ikala amanani e-capacitor ngokuvamile ukusuka ku-picofarad ukuya kuma-millifarad. Njalo khipha ama-capacitor ngokuphelele ngaphambi kokuhlolwa; ama-capacitor ashajwayo angalimaza ukujikeleza kwemitha okokufaka okubucayi.
• The imvamisa uphawu (Hz) lukala imvamisa yesignali ye-AC, luwusizo ekuqinisekiseni amasekhethi e-oscillator namasignali e-PWM.
• Temperature isilinganiso sibonisa izimpawu ze-°C noma °F futhi sidinga i-adaptha ye-thermocouple.

Lezi zimpawu ze-multimeter ezithuthukisiwe zandisa amandla okuxilonga kodwa zidinga ukuqonda izidingo ezithile zokuxhumeka komsebenzi ngamunye.

Izexwayiso Ezibalulekile Zokuphepha Uma Usebenzisa Izimpawu Ze-Multimeter

Ukuhumusha okufanelekile kophawu lwe-multimeter kuvimbela ukulimala kwensimbi nokulimala komuntu siqu. Ukuqonda ukuthi yiziphi izimpawu ezidinga amaphrothokholi athile okuphepha kuvikela kokubili umqhubi nezinto zokusebenza:

• Yehlisa amandla okumelana - Ungalokothi ulinganise ukumelana noma ukuqhubeka kumasekethe abukhoma; isignali yokuhlola imitha ayikwazi ukunqoba i-voltage esetshenzisiwe
• Ukukhetha ububanzi bamanje - Njalo qala ngebanga eliphakeme kakhulu kanye nojeke ongu-10A ukuze uvimbele ukwehluleka kwefuse, bese ushintshela kububanzi obuphansi ukuze uthole ukulungiswa okungcono
• Ukuqinisekiswa kwesilinganiso se-CAT - Qinisekisa ukufana kwamamitha noma weqe indawo yakho yohlelo lokusebenza ngaphambi kokuhlolwa
• Ukuhlolwa kophenyo - Sebenzisa ama-probes afakwe i-insulated kuphela alinganiselwe amandla aphezulu alindelekile; hlola imikhondo yokuhlola njalo ukuze uthole ukugqunywa okulimele
• Ukuqinisekisa umsebenzi - Ukusetha ukudayela kuzimpawu ze-multimeter ezingalungile kukhiqiza ukufundwa okudukisayo; ukulinganisa i-voltage kumodi yamanje kudala amasekethe amafushane ayingozi

Ukuxazulula inkinga Ukufundwa Kwezimpawu Ezingajwayelekile ze-Multimeter

Uma ukufundwa kwamamitha amaningi kubonakala kungavamile, inqubo yokuxilonga ehlelekile isiza ukuhlukanisa imbangela ewumsuka ngendlela efanele. Esikhundleni sokuthatha ukwehluleka kwemitha, kuvame ukusebenza ngempumelelo kakhulu ukuhlola izici ezinomthelela eziboniswa izimpawu nemodi yokulinganisa esetshenziswayo.

• Ukufundwa okungu-zero okuqhubekayo - Ngokuvamile kubangelwa ama-test leads alimele, ukuthintana kwe-probe okuxekethile, noma i-fuse eqhumile lapho kusetshenziswa amabanga wamanje.

• “OL” noma inkomba yokulayisha ngokweqile – Inani elilinganisiwe lidlula ububanzi obukhethiwe noma i-probe ibekwa kwimodi yokulinganisa engahambisani.

• Ukufundwa okungazinzile noma okushintshashintshayo - Kungase kubangelwe ukuzinza kwe-probe okungekuhle, umsindo kagesi, noma izilinganiso ezithathwe ezindleleni ezine-impedance ephezulu.

• I-voltage engalungile kumodi ye-DC - Ngokuvamile ikhombisa i-polarity eguquliwe phakathi kwama-probe kanye nesekethe.

Ngokubuyekeza le mibandela isinyathelo ngesinyathelo, ochwepheshe banganciphisa izinkinga ezingaba khona ngaphambi kokuphetha ngokuthi ithuluzi linephutha. Ukuqinisekisa ubuqotho be-probe, ukuhlola ukubekwa kukajeke, ukukhetha uphawu olulungile lwe-multimeter nobubanzi, nokuqinisekisa isimo sesekhethi ngokuvamile kuxazulula ukufundwa okungajwayelekile okuningi.

Ukugeleza komsebenzi okusebenzayo kokusetshenziswa kwezimpawu ze-Multimeter

Ukusetshenziswa kwe-multimeter ngempumelelo kulandela indlela engaguquki.

1. Qala ngokuthi ukukhomba uhlobo lokulinganisa oludingekayo-voltage, yamanje, ukumelana, noma ukuhlolwa okukhethekile. Khetha uphawu oluhambisanayo lwe-multimeter odayelini lokusebenza bese ukhetha ububanzi obufanele obuqala phezulu ngokulondolozayo.
2. Faka ama-probe okuhlola kumajekhi alungile ngokusekelwe kumsebenzi okhethiwe. Qinisekisa ukuthi izimo zesekethe zihambisana nezidingo zokuhlola—okunikezwe amandla kagesi kanye nezamanje, kukhishwe amandla okumelana nokuqhubeka. Misa ukuthintana okuqinile kophenyo ezindaweni zokuhlola ezihlosiwe, uphawula i-polarity yezilinganiso ze-DC.
3. Ngemva ukuqedela izilinganiso, buyisela ukudayela endaweni ephephile njenge-voltage yebanga eliphezulu ukuze kuvinjwe amasekhethi amafushane emodi yamanje ngephutha.

Isiphetho: Umbono Wethu Wobunjiniyela ku-Multimeter Symbols Mastery

Ukuthuthukisa Ukujwayela Okungokoqobo Ngezimpawu ze-Multimeter

Ngokusekelwe kokuhlangenwe nakho kwethu ekuhlanganisweni kwe-PCB kanye nokulawulwa kwekhwalithi kwa-Highleap Electronics, sibonile ukuthi onjiniyela kanye nochwepheshe abathuthukisa ukujwayelana okucacile nezimpawu ze-multimeter bavame ukwenza izinqumo zokuxilonga ezihambisanayo. Izinkinga eziningi ezivamile zokulinganisa—njengokuzama ukuhlola i-voltage ebangeni lamanje noma ukumelana kokulinganisa ebhodini elinamandla—ngokuvamile zivela ekuchazeni kabi izimpawu kunokuba ukuntuleka kwekhono lobuchwepheshe.

Ukuqeqeshwa Nokusetshenziswa Kwansuku Zonke Ezindaweni Zokukhiqiza

Ukunciphisa amaphutha anjalo, sinikeza ochwepheshe abasha ukuzijwayeza kumasekhethi ezithenjwa ngaphambi kokuba baqale ukusebenza kumabhodi okukhiqiza. Lesi sinyathelo sisiza ukuqinisa umehluko phakathi kwe-V~ ne-V⎓, isidingo sokuxhuma kochungechunge lapho kukalwa okwamanje, kanye nemikhuba edingekayo ukuze kuqinisekiswe izindlela zokulinganisa ngaphambi kokuhlola isekethe ebukhoma.

Indlela Izimpawu Ezisekela Ngayo Ukuxilongwa Komhlaba Wangempela

Ngesikhathi sokuxilonga okujwayelekile, izimpawu zamamitha amaningi zivame ukuhlinzeka ngezimpawu ezidlulela ngale kokufundwa kwezinombolo. Isibonelo, ithoni eqhubekayo eqhubekayo ingase isiholele ekuhloleni amalunga e-solder, kuyilapho ukufundwa okungavamile kwimodi ye-diode kungadonsela ukunaka ekonakaleni kwengxenye okungenzeka. Lokhu kuhumusha kuncike ekuqondeni imodi yokulinganisa ekhethiwe nokuthi uphawu lumele ini kumongo wesekethe.

Indlela Ehlelekile Yokwakha Ubungcweti

Kulabo abathuthukisa isethi yabo yamakhono obuchwepheshe, indlela yokufunda kancane kancane ivame ukusebenza ngempumelelo. Ochwepheshe abaningi baqala nge-DC voltage kanye nezindlela zokumelana njengoba lezi zisetshenziswa kakhulu emsebenzini wansuku zonke. Isilinganiso samanje, amandla kagesi we-AC, nemisebenzi ekhethekile ingase ihlanganiswe njengoba ukunethezeka kukhula. Ukugcina ikhadi elincane eliyireferensi eduze nebhentshi lokusebenzela nakho kusiza ukuqinisa ukuqashelwa kwezimpawu ngesikhathi semisebenzi evamile.

Imicabango Final

Izimpawu zama-multimeter zinikeza indlela engaguquki yokusebenzelana namasekhethi kuwo wonke amathuluzi nabakhiqizi abahlukene. Ukwakha ukuqonda okuqinile kwalezi zimpawu kusekela ukuxazululwa kwezinkinga okunembile, kunciphisa amaphutha agwemeka, futhi kunikele emikhubeni yokuhlola ethembeke kakhudlwana yama-elekthronikhi.

Imibuzo Evame Ukubuzwa Mayelana Nezimpawu Ze-Multimeter

Yini ehlukanisa i-V~ nezimpawu ze-V⎓?

Uphawu lwe-V~ olunomugqa we-wavy lukala i-voltage yamanje eshintshanayo ehlehlisa ukugqama ngezikhathi ezithile, kuyilapho i-V⎓ enemigqa eqondile nedeshi ikala i-voltage yamanje eqondile ne-polarity engashintshi. Ukusebenzisa imodi ye-AC emithonjeni ye-DC noma ngokuphambene khiqiza ukufundwa okunganembile.

Kungani uphawu lwe-Ω ludinga amasekhethi aphelelwe amandla?

Imitha ijova i-current encane eyaziwayo futhi ilinganise i-voltage engumphumela wokubala ukumelana. Imithombo yamandla kagesi yangaphandle iphazamisana nalokhu kuhlolwa kwamanje, iveza ukufundwa okungamanga futhi kulimaze umjikelezo we-ohms ozwelayo wemitha.

Yini eyenza izimpawu zamanje ze-multimeter zihluke ekuhlolweni kwe-voltage?

Ukulinganisa kwamanje kudinga uxhumo lochungechunge lapho isekethe yamanje igeleza kusinqamuleli sangaphakathi semitha, kuyilapho ukukalwa kwe-voltage kusebenzisa uxhumano oluhambisanayo lwe-impedance ephezulu. Ukuhlola kwamanje kudinga ukuphulwa komzila wesekethe, ngokungafani nokuhlola amandla kagesi okungaphazamisi.

Ngiyihumusha kanjani imiphumela yokuhlolwa kokuqhubeka ngisebenzisa uphawu lwe-beeper?

Ibhiphu enganyakazi ibonisa ukumelana ngezansi komkhawulo (ngokuvamile okungu-30-50Ω), okuqinisekisa indlela eqhubekayo yokuqhuba. Ayikho ibhiphu isho ukumelana okuphezulu noma isifunda esivulekile. Ukubhipha okungapheli kuphakamisa ukuxhumana okubuthakathaka okudinga ukuhlolwa.