Ungayikhetha kanjani i-multimeter: zonke izeluleko odinga ukuzazi

indlela yokukhetha i-multimeter

Una yamathuluzi asetshenziswe kakhulu emhlabeni kagesi nogesi, ikakhulukazi ochwepheshe nabenzi, kunjalo i-multimeter noma i-multimeter. Into evumela ukukala amanani amaningi nokwenza Ukuhlola okuyisisekelo kwalolu hlobo lwamasekethe.

Ngesikhathi sika qhathanisa ama-multimeter bese ukhetha okufaneleke kakhulu, akubona bonke abantu abacace bha. Ngakho-ke, uma ufuna ukutshala imali yakho kahle futhi ube nento enhle esezingeni futhi enembile ezilinganisweni zayo, kufanele unake lo mhlahlandlela lapho kukhonjiswa khona zonke izimfihlo ...

Yini i-multimeter?

indlela yokukhetha i-multimeter, i-multimeter

Un i-multimeter, umhloli noma i-multimeter, iyithuluzi elenziwa ngogesi elivumela amanani amaningi kagesi ukuthi alinganiswe kumasekethe e-AC / DC. Isibonelo, ungalinganisa izintambo, amandla, amandla, ukumelana, amandla, njll. Ezinye zifaka neminye imisebenzi efana nokuhlola ama-transistors, amasekethe avulekile (ukuqhubeka), njll. Kungakho aziwa njenge-poly noma ama-multi, ngoba angalinganisa izinto eziningana.

Lezi zinhlobo zama-multimeter zineziningana amathuluzi wokulinganisa ngaphakathi, kubekwe eqenjini ukuze bakwazi ukunikeza zonke izilinganiso ezisekelwayo. Okusho ukuthi, aqukethe i-voltmeter, i-ammeter, njll. Ngaphezu kwalokho, basekela ukukhetha ukuphindwaphindwa okuningi noma izinhlokwana zamanani asekelwayo ukulingana isikali esifanele.

Ukuze uthathe izilinganiso, unezintambo nge ezinye izindlela lapho kuthintwa khona ukwazi ukukala ubukhulu obuhlukile besifunda:

  • Ucingo olumnyama (-): okubizwa nge-COM noma okuvamile. Yiyo esebenzela bonke ubukhulu.
  • Ucingo olubomvu (+): ukuthi enye ikhebula izoxhunywa kuphini nehlelo lobukhulu obuzolinganiswa, ngokwesibonelo, ukukala amandla kagesi kufanele ubheke iphini ekhombisa i-V, noma ukukala amandla A, njll.

Lapho lokhu sekwenziwe futhi isikhethi sesibekiwe endaweni yobukhulu obufanele obuzolinganiswa, ukuthinta isekethe kuzokhombisa inani le isilinganiso esikrinini.

Izinhlobo ze-multimeter

i-analog multimeter

Kukhona izinhlobo ezimbili eziyisisekelo Okufanele ukwazi uma ufuna ukukhetha i-multimeter:

  • I-analogue: Zindala futhi zakudala ngokwengeziwe, yize zivame ukukhethwa ngochwepheshe ngenxa yokunemba nokuthembeka kwazo. Ukukhombisa imiphumela, banesikrini esinesikali nenaliti esizomaka inani.
  • Digital: Zingezesimanjemanje futhi kulula ukuzisebenzisa, ngoba zinesikrini se-LCD ukukhombisa imiphumela. Imvamisa kuyizintandokazi zabaningi, ikakhulukazi kwabaqalayo. Futhi zikala ngokunemba okuhle, kepha zandisa ukunemba lapho zifunda izilinganiso ngokubonisa inani lezinombolo.

Noma ngabe luhlobo luni, kufanele linda kancane, ngoba amanani ngeke aqhubeke azinzile esikrinini kuze kube ngemuva kwezikhathi ezimbalwa. Ngakho-ke, inani lokuqala elivelayo kungenzeka lingabi lihle kunawo wonke.

Ungayisebenzisa kanjani i-multimeter

indlela yokukhetha i-multimeter, indlela yokusebenzisa

Usebenzisa i-multimeter kuqondile. Konke kuzoya ngobukhulu ofuna ukukala. Okuvamile kakhulu yile:

  • Voltage noma voltage: ngaphezu kokubeka ikhebula elibomvu ku-V plug kanye nesikhethi kuyunithi elifanele (i-mV, V, kV ...), ngokuya ngesiginali ozoyihlola (ngokwesibonelo, akufani ukukala isifunda se-DC esinama-voltages aphezulu kakhulu). siphansi entanjeni kagesi yendlu eku-220V approx.). Uma usulungile, khetha amatheminali amabili noma amaphuzu phakathi ofuna ukukala umehluko ongaba khona noma we-voltage futhi uzokhonjiswa esikrinini. Khumbula ukusebenzisa ucingo olumnyama umhlabathi / umhlabathi.
  • Abaphikisi: futhi ukhetha kwisikhethi iyunithi yama-resistors nesikali esifanele, ngaphezu kokuxhuma ucingo olubomvu ku-plug yama-resistors (Ω). Manje kuzoba yindaba yokuthinta ngazo zombili izeluleko zamaseli phakathi kwamaphoyinti lapho ufuna ukukala ukumelana khona, njengamatheminali amabili wokumelana nenani lizovela esikrinini.
  • Umfutho: Okwamanje kunzima kakhulu, ngoba kufanele ubeke amathiphu ama-probes ochungechungeni futhi ngeke kwenziwe ngokufana. Ngaphandle kwalokho kuzofana, kukhethwe ubukhulu obufanele nokubeka ucingo olubomvu kuphini A.

Amanye ama-multimeter anemisebenzi eminingi kunaleyo engenziwa ngendlela efanayo. Ngaphezu kwalokho, kukhona ezinye ezinezinkinobho ezivulekile nezicishiwe, imemori, njll. Ungakwazi funda imanuwali yemodeli yakho ukuthola eminye imininingwane nokuhlonipha izindlela zokuphepha. Isilinganiso esibi singalimaza i-multimeter ...

Ungayikhetha kanjani i-multimeter

indlela yokukhetha i-multimeter

Uma uzibuza ungakhetha kanjani i-multimeter, kufanele ukhumbule izinzuzo ezilandelayo:

  • Ukulungiswa namadijithi: into yokuqala ukukhetha phakathi kwe-analog noma yedijithali, ngokuya ngokuncamelayo, noma ngabe uqobo lwami ngingancoma idigital. Lapho usukucacile lokho, kufanele ubheke idatha yokulungiswa, ezonquma ushintsho oluncane kunazo zonke engalulinganisa. Okungcono kakhulu, kuzoba nokuzwela ngokwengeziwe.
  • Ukunemba- Ukunemba kwezinsimbi zakho zokulinganisa nakho kubalulekile. Noma kunjalo uma ufuna ukuthi isetshenziselwe ubuchwepheshe noma izinhlelo zokusebenza lapho ukuhluka okuncane kungenza ushintsho olukhulu. Lokhu kuvame ukukalwa ngo-%. Ukwehla kwenombolo, kungcono. Isibonelo, kungaba njalo I-± 0.05% + 3 LSD, okusho ukuthi inokunemba okunjalo, i-LSD iyinombolo ebaluleke kakhulu ekhombisa ukunemba okuchazwe yiphutha elenziwa amasekethe (umsindo, ukubekezelelana kwesiguquli se-ADC,…). Kulokhu, uma ubufuna ukukala i-voltage ngalawo manani wesiginali engu-12 VDC, i-multimeter yakho izokhombisa ukukala inani eliphakathi kuka-11,994 no-12,006V, okuhambisana ne-LSD ka-3 okungasho ukuthi umphumela wokugcina uzoba phakathi kuka-11,001 no-12,009.
  • I-RMS (TrueRMS)Lokhu ngomehluko omkhulu kakhulu phakathi kwe-multimeter eshibhile kanye nochwepheshe. Kubhekiswa ezilinganisweni ze-AC, lapho kuzinsimbi ezishibhile kucatshangwa ukuthi ama-waveforms azoba yi-sinusoidal ephelele, into engenzeki ngokweqiniso, ekhombisa ukufundwa okungathenjwa kangako. Endabeni ye-TrueRMS izokhombisa ukukalwa okungokoqobo.
  • Impedance wokufaka- Lokhu futhi kuyisici esikhulu sokwehlukanisa phakathi kweshibhile nokubi kokuhle. Lapho i-impedance iphakeme kokufakwayo, lokhu kuzoba nomthelela ekulinganisweni kwamanani kancane ngangokunokwenzeka lapho kukalwa. Abantu ababi bavame ukuba nabo 1MΩ, kuyilapho okuhle kungaba yi-10MΩ noma ngaphezulu.
  • Imisebenzi: kubalulekile ukuthi uthole i-multimeter enawo wonke ubukhulu obudinga ukulinganisa njalo. Abanye banezici ezithile ezingeziwe abanye abangenazo. Ngakho-ke, nquma ukuthi yini oyidingayo emsebenzini wakho ojwayelekile noma ekuzilibaziseni, bese ukhetha eyodwa enabo bonke ubukhulu.

Ama-multimeter anconyiwe

Uma ufuna khetha imodeli ephephile, ungasebenzisa lolu hlu ngezinye zezinto ezinhle kakhulu ongazithola, futhi ngamanani ahlukile ukuzivumelanisa nawo wonke amaphakethe nezidingo:

  • I-Fluke 115- I-multimeter yedijithali eyi-TrueRMS eyi-professional, futhi enesibonisi esimhlophe se-LCD sokusebenza noma ezimeni zokukhanya eziphakeme kakhulu.
  • I-Uni-Ball T UT71: enye yama-multimeter amahle kakhulu emakethe enesibonisi se-LCD yedijithali. Ngokunemba okuphezulu nokuthembeka.
  • I-Extech EX355: i-multimeter ene-TrueRMS, izilinganiso ezinembile kakhulu ze-DC ne-AC, i-LoZ yokugwema ukufundwa okungamanga ngama-phantom voltages, isihlungi se-FPB ephansi yokudlulisa isilinganiso esiqondile sesiginali yemvamisa eguquguqukayo, umtshina ongaxhumani ne-AC voltage onenkomba ye-LED.
  • IKaiweets HT118A: I-TrueRMS, ukucacisa okuphezulu, ubuningi bemisebenzi, ukulungisa ngokuzenzakalela ukukala kalula futhi ngokushesha, ine-NCV engathinti i-voltage detector, ukuvikela ukuphepha okukhulu nobude besikhathi.
  • UKuman: multimeter eshibhile kepha lokho kuyawenza umsebenzi wawo. Nge-TrueRMS, imisebenzi eminingi.
  • Ayikho imikhiqizo etholakele.- Omunye ongabizi kakhulu, umhloli wokubonisa wedijithali wezilinganiso eziningi. Ilungele abaqalayo nezimfundamakhwela. Nge-NCV nokhiye wokusebenza.
  • AoKoZo: enye eshibhile, kepha engembi kangako. Nge-NVC, i-TrueRMS, nazo zonke izici ozilindele kusuka ku-multimeter yedijithali.
  • UShexton: Uma ufuna i-analog eyodwa ngaphandle kwe-nostalgia noma ngoba ukhetha lolu hlobo lwedivayisi, unakho ukukhetha kwalokhu okuhlola ngobuchwepheshe obuphezulu.
  • UNikou: enye indlela ye-analog kule eyedlule. Ayibizi, kepha iyawenza umsebenzi uma ufuna okuthile okulula.

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Shiya umbono wakho

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  1. Ubhekele imininingwane: Miguel Ángel Gatón
  2. Inhloso yedatha: Lawula Ugaxekile, ukuphathwa kwamazwana.
  3. Ukusemthethweni: Imvume yakho
  4. Ukuxhumana kwemininingwane: Imininingwane ngeke idluliselwe kubantu besithathu ngaphandle kwesibopho esisemthethweni.
  5. Isitoreji sedatha: Idatabase ebanjwe yi-Occentus Networks (EU)
  6. Amalungelo: Nganoma yisiphi isikhathi ungakhawulela, uthole futhi ususe imininingwane yakho.