Omnye izixhobo ezisetyenziswa kakhulu kwihlabathi lombane kunye ne-elektroniki, ngakumbi ngamagcisa kunye nabenzi, kunjalo i-multimeter okanye i-multimeter. Into evumela ukulinganisa amanani amaninzi kunye nokwenza Ukutshekishwa okusisiseko kolu hlobo lweesekethe.
Ngexesha le thelekisa ii-multimeter kwaye ukhethe eyona ifanelekileyo, ayinguye wonke umntu ocacileyo. Ke ngoko, ukuba ufuna ukutyala imali yakho kakuhle kwaye unento elungileyo esemgangathweni kwaye ichanekile kwimilinganiselo yayo, kuya kufuneka unikele ingqalelo kwesi sikhokelo apho zonke iimfihlo zibonisiwe ...
Yintoni imultimeter?
Un multimeter, tester okanye kwimultimeter, sisixhobo esisebenza ngombane esivumela ubungakanani obahlukeneyo bombane ukuba bulinganiswe kwiisekethe ze-AC / DC. Umzekelo, unokulinganisa imilinganiselo, amandla, amandla, ukuxhathisa, amandla, njl. Ezinye zibandakanya imisebenzi eyongezelelweyo njengokujonga iitransistors, iisekethe ezivulekileyo (ukuqhubeka), njl. Kungenxa yoko le nto baziwa njenge-poly okanye ezininzi, kuba banokulinganisa izinto ezininzi.
Ezi ntlobo zee-multimeter zininzi izixhobo zokulinganisa ngaphakathi, kudityanisiwe ukuze bakwazi ukunika yonke imilinganiselo exhaswayo. Oko kukuthi, ziqukethe i-voltmeter, i-ammeter, njl. Ukongeza, baxhasa ukukhetha ukuphindwaphindwa okanye ubuninzi bezixa ezixhaswayo ukulungela isikali esichanekileyo.
Ukuthatha imilinganiselo, uneentambo nge ezinye iinkqubo Unxibelelwano olwenziwe ukuba lukwazi ukulinganisa ubukhulu obahlukeneyo besekethe:
- Ucingo olumnyama (-): yinto ebizwa ngokuba yi-COM okanye eqhelekileyo. Nguye osebenzela bonke ubukhulu.
- Ucingo olubomvu (+): ukuba enye intambo iza kuqhagamshelwa kwipini kunye nehlelo lobukhulu obuza kulinganiswa, umzekelo, ukulinganisa umbane kufuneka ufumane ipini ebonisa uV, okanye ukulinganisa amandla A, njl.
Nje ukuba kwenziwe oku kwaye isikhethi sibekwe kwindawo enobungakanani obufanele ukulinganiswa, ukuchukumisa isekethe kuya kubonisa ixabiso umlinganiso kwiscreen.
Iindidi zemultimeter
Kukho Iindidi ezimbini ezisisiseko Into omele uyazi ukuba ufuna ukukhetha i-multimeter:
- I-analogueZindala kwaye zakudala ngakumbi, nangona zihlala zikhethwa ziingcali ngenxa yokuchaneka nokuthembeka kwazo. Ukubonisa iziphumo, banescreen esikalini kunye nenaliti eya kuphawula ixabiso.
- Digital: Zezakutshanje kwaye zilula ngokusetyenziswa, kuba zinesikrini seLCD ukubonisa iziphumo. Zihlala zithandwa kakhulu, ngakumbi kubaqalayo. Balinganisa ngokuchanekileyo, kodwa bandise ukuchaneka xa kufundwa imilinganiselo ngokubonisa ixabiso lamanani.
Nokuba loluphi uhlobo, kuya kufuneka Yima kancinci, kuba amaxabiso awazukuhlala ezinzile kwiscreen kude kube semva kwemizuzwana. Ke ngoko, ixabiso lokuqala elibonakalayo linokungangcono.
Uyisebenzisa kanjani imultimeter
Sebenzisa imultimeter ilungile ngokuthe ngqo. Yonke into iya kuxhomekeka kubukhulu ofuna ukulinganisa. Ezona zixhaphakileyo zezi:
- Ombane okanye ombane: Ukongeza ekubekeni intambo ebomvu kwiplagi ye-V kunye nesikhethi kwiyunithi efanelekileyo (mV, V, kV ...), kuxhomekeke kumqondiso oza kuwujonga (umzekelo, akufani ukulinganisa isekethe yeDC enezinga eliphezulu kakhulu. ezantsi kumgca wombane wendlu eku-220V approx.). Xa sele ilungile, khetha ii-terminals ezimbini okanye amanqaku phakathi kwawo ofuna ukulinganisa umahluko okhoyo okanye ombane kwaye iya kuboniswa kwiscreen. Khumbula ukusebenzisa ucingo olumnyama emhlabeni / emhlabeni.
- Abaxhasi: Kwakhona ukhetha kwisikhethi iyunithi yezichasisi kunye nenqanaba elifanelekileyo, ukongeza ekunxibelelaniseni ucingo olubomvu kwiplagi yezinto ezichasayo (Ω). Ngoku iya kuba ngumcimbi wokuchukumisa zombini ezi ngcebiso zeeproses phakathi kweendawo apho ufuna ukulinganisa khona ukunganyangeki, ezinje ngeetheminali ezimbini zokuchasana kunye nexabiso eliza kuvela kwiscreen.
- Ubunzulu: okwangoku kunzima ngakumbi, kuba kuya kufuneka ubeke iingcebiso zeenkqubo kuludwe kwaye ayinakwenziwa ngokudibeneyo. Ngaphandle koko iya kufana, ukhetha ubukhulu obufanelekileyo kwaye ubeke ucingo olubomvu kwipini A.
Ezinye ii-multimeter zinemisebenzi engaphezulu kunokwenziwa ngendlela efanayo. Ukongeza, kukho ezinye ezinamaqhosha nokucima, inkumbulo, njl. Unga funda incwadana yemigaqo yemodeli yakho ngolwazi oluthe kratya kunye nokuhlonipha amanyathelo okhuseleko. Imilinganiselo emibi inokonakalisa imultimeter ...
Uyikhetha njani imultimeter
Ukuba uyabuza indlela yokukhetha i-multimeterKuya kufuneka ukhumbule ezi zibonelelo zilandelayo:
- Isisombululo kunye namanani: into yokuqala kukukhetha phakathi kweanalog okanye eyedijithali, ngokokhetho lwakho, nangona ngokobuqu ndingacebisa ngedigital. Nje ukuba ucace, kuya kufuneka ujonge isisombululo sedatha, eya kuthi igqibe elona tshintsho lincinci inokulinganisa. Eyona nto ibhetele, iya kuba novakalelo ngakumbi.
- ukuchaneka-Ukuchaneka kwezixhobo zakho zokulinganisa kubalulekile. Ngakumbi nangakumbi ukuba ufuna ukusetyenziswa kobuchule okanye usetyenziso apho umahluko omncinci unokwenza utshintsho olukhulu. Oku kuhlala kulinganiswa ngeepesenti. Inani eliphantsi, ngcono. Umzekelo, kunokuba njalo ± 0.05% + 3 LSD, nto leyo ethetha ukuba inokuchaneka, i-LSD lelona nani libalulekileyo elibonisa ukuchaneka okuchazwe yimpazamo eyenziwe sisekethe (ingxolo, ukunyamezelana kwesiguquli seADC,…). Kule meko, ukuba ufuna ukulinganisa i-voltage ngala maxabiso e-12 VDC signal, i-multimeter yakho iya kubonisa ukulinganisa ixabiso phakathi kwe-11,994 kunye ne-12,006V, yona kunye ne-LSD ye-3 eya kuthetha ukuba isiphumo sokugqibela phakathi ko-11,001 no-12,009.
- I-RMS (TrueRMS)Lo ngowona mahluko mkhulu phakathi kwemultimeter engabizi kakhulu kunye nengcali. Ibhekisa kwimilinganiselo ye-AC, xa kwizixhobo ezinamaxabiso aphantsi kucingelwa ukuba ii-waveforms ziya kuba ze-sinusoidal egqibeleleyo, into engekhoyo ngokwenyani, ebonisa ukufundwa okungathembekanga. Kwimeko ye-TrueRMS iya kubonisa imilinganiselo ethe kratya.
- Igalelo lokungenisa- Oku kukwahlulahlula phakathi kwexabiso eliphantsi nelibi kwinto elungileyo. Xa i-impedance iphezulu kwigalelo, oku kuya kuba nefuthe kumlinganiso wamaxabiso kangangoko kunokwenzeka xa kuthelekiswa. Abantu ababi bahlala benayo 1MΩ, ngelixa ezilungileyo zinokuba zi-10MΩ okanye nangaphezulu.
- Imisebenzi: kubalulekile ukuba ufumane i-multimeter enazo zonke ubukhulu ezifuneka uzilinganise rhoqo. Abanye baneempawu ezithile ezongezelelweyo abanye abangazenziyo. Ke, misela into oyifunayo emsebenzini wakho oqhelekileyo okanye into oyithandayo, kwaye ukhethe leyo inazo zonke ezo zinto zinkulu.
Kucetyiswa ii-multimeter
Ukuba ufuna khetha imodeli ekhuselekileyo, ungalusebenzisa olu luhlu ngezinye zezona zilungileyo unokuzifumana, kunye namaxabiso awahlukeneyo okuziqhelanisa nazo zonke iipokotho kunye neemfuno:
- I-Fluke 115-I-multimeter yedijithali eyi-TrueRMS enobuchwephesha, kunye nomboniso omhlophe weLCD ukuze usebenze nkqu nakwiimeko eziphezulu zokukhanya.
- Ibhola ye-Uni-T UT71: Enye yeemultimeter zobungcali ezivenkileni ezinomboniso wedijithali weLCD. Ngobuciko obuphezulu kunye nokuthembeka.
- Ingcaciso EX355I-multimeter ene-TrueRMS, imilinganiselo echanekileyo ye-DC kunye ne-AC, i-LoZ ukunqanda ukufundwa okungeyonyani nge-phantom voltages, i-FPB ephantsi yokupasa isihluzi esichanekileyo somlinganiso wesiginali esichazayo, esingadibani nomtshini wombane we-AC onomboniso we-LED.
- IKaiweets HT118A: I-TrueRMS, ukuchaneka okuphezulu, ubuninzi bemisebenzi, ukuguqula ngokuzenzekelayo ukulinganisa ngokulula nangokukhawuleza, ineNVV engadibaniyo nesixhobo sokujonga amandla ombane, ukhuseleko lokhuseleko olukhulu kunye nexesha.
- kuman: ngexabiso eliphantsi kodwa uyawenza umsebenzi. Nge-TrueRMS, uninzi lwemisebenzi.
- Akukho mveliso ifunyenweyoOlunye uxabisi, umboniso wedijithali wokuvavanya imilinganiselo emininzi Ilungele abaqalayo kunye nabadlali. NgeNCV kunye nomsebenzi ophambili.
- AoKoZo: enye yexabiso eliphantsi, kodwa akukho ngaphantsi kakubi. Nge-NVC, i-TrueRMS, kunye nazo zonke izinto ozilindeleyo kwimultimeter yedijithali.
- UShextonUkuba ufuna i-analog eyodwa ngaphandle kwe-nostalgia okanye ngenxa yokuba ukhetha olu hlobo lwesixhobo, unokukhetha kule tester ichanekileyo.
- UNikou: enye indlela ye-analog yangaphambili. Ayibizi, kodwa iyawenza umsebenzi ukuba ujonga into elula.