Taw qhia
A digital multimeter(DMM)yog ib qho ntawm cov cuab yeej tseem ceeb tshaj plaws hauv kev kuaj hluav taws xob thiab kev kuaj mob. Kev sib xyaw ua haujlwm ntawm ntau yam ntsuas ntsuas -xws li voltmeters, ammeters, thiab ohmmeters- rau hauv ib qho khoom siv tes tuav, ib qho digital multimeter tso cai rau koj ntsuas cov hluav taws xob sib txawv nrog qhov raug siab. Cov khoom siv no tau siv dav los ntawm cov kws tshaj lij, cov kws tshaj lij, cov neeg nyiam DIY, thiab cov neeg nyiam ua haujlwm los daws teeb meem hauv Circuit Court, kuaj cov khoom, thiab xyuas cov tshuab hluav taws xob. Fluke Corporation+1
Dab tsi yog Digital Multimeter?
Digital multimeter yog ib qho khoom siv ntsuas hluav taws xob uas qhia cov lej nyeem ntawm cov hluav taws xob ntau. Nws feem ntau ntsuas qhov voltage (V), tam sim no (A), thiab tsis kam (Ω), thiab tuaj yeem suav nrog cov haujlwm ntxiv xws li kev ntsuas txuas ntxiv, ntsuas zaus, ntsuas diode, ntsuas qhov ntsuas, thiab ntsuas kub. Tsis zoo li analog meters nrog cov koob txav, cov multimeters tso saib cov ntawv nyeem raws li cov lej tseeb ntawm lub vijtsam LCD lossis LED, ua rau lawv yooj yim nyeem thiab txhais. Fluke Corporation+1
Yuav Ua Li Cas Digital Multimeter Ua Haujlwm
Ntawm nws cov tub ntxhais, ib qho digital multimeter ua haujlwm los ntawm kev hloov cov teeb liab hluav taws xob nws ntsuas rau hauv tus nqi digital siv cov khoom siv hluav taws xob sab hauv:
Lub teeb liab input yog conditioned thiab scaled ces nws yuav raug soj ntsuam zoo.
Ibanalog-rau-digital converter (ADC)hloov cov teeb liab analog hluav taws xob rau hauv cov ntaub ntawv digital.
Cov txheej txheem sab hauv txhais cov ntaub ntawv digital no, siv ntau yam kev hloov kho, thiab suav cov kev nyeem ntawv kawg.
Cov txiaj ntsig ntawm tus lej tau tshwm sim ntawm lub multimeter's zaub. allelcoelec.com
Cov txheej txheem no tso cai rau lub tshuab ntsuas ntsuas kom muab qhov tseeb, tiag tiag- lub sijhawm ntsuas hluav taws xob, feem ntau nrog nws pib- muaj peev xwm sib txawv uas xaiv qhov ntsuas qhov tsim nyog yam tsis muaj phau ntawv nkag. NI
Cov Cheebtsam tseem ceeb ntawm Digital Multimeter
Ib qho digital multimeter suav nrog cov hauv qab no:
Zaub Screen:Qhia ntsuas cov txiaj ntsig kom meej hauv hom digital.
Function Dial lossis Selector:Cia koj xaiv hom kev ntsuas (piv txwv li, voltage, tam sim no, tsis kam).
Test Leads/Probes:Saj zawg zog insulated xov hlau uas txuas lub 'meter' mus rau Circuit Court nyob rau hauv kev sim.
Input Jacks:Cov chaw nres nkoj uas kuaj cov hlau lead yog ntsaws rau ntau hom kev ntsuas.
Internal Circuitry & ADC:Hloov thiab ua cov teeb liab rau digital readout. Fluke Corporation
High -DMMs zoo kuj tseem tuaj yeem suav nrog cov yam ntxwv ntxiv xws liauto-ntaus, siab input impedance rau qhov tsawg tshaj plaws Circuit Court loading, thiab cov ntaub ntawv logging rau cov ntaub ntawv ntsuas lub sij hawm. electronics-notes.com
Cov Kev Ntsuas Feem Ntau Koj tuaj yeem ua nrog Digital Multimeter
Kev ntsuas hluav taws xob
Voltage yog qhov sib txawv ntawm ob lub ntsiab lus hauv hluav taws xob hluav taws xob. Lub tshuab hluav taws xob digital ntsuas DC voltage (cim los ntawm txoj kab ncaj nraim) rau cov roj teeb thiab cov khoom siv hluav taws xob, thiab AC voltage (cim los ntawm kab wavy) rau lub zog hluav taws xob lossis cov hluav taws xob hauv tsev. Keysight
Kev ntsuas tam sim no
Txhawm rau ntsuas tam sim no, lub multimeter tau muab tso rauhauv seriesnrog lub voj voog kom cov tam sim no ntws los ntawm lub 'meter'. DMMs ntsuas DC tam sim no thiab AC tam sim no, nyob ntawm hom xaiv. Keysight
Kev ntsuas ntsuas
Resistance qhia ntau npaum li cas ib feem los yog cov khoom resists tam sim no ntws. Lub multimeter txhaj ib qho me me tam sim no thiab ntsuas qhov tshwm sim qhov hluav taws xob poob los ntsuas kev tiv thaiv siv Ohm Txoj Cai. NI
Vim li cas thiaj xaiv Digital Tshaj ib qho Analog Multimeter?
Piv rau cov laus analog multimeters uas siv cov koob txav mus, digital multimeters muaj ntau yam zoo:
Ntau qhov tseeb:Digital readouts txo qhov kev nyeem ntawv yuam kev.
Siab Input Impedance:Txo kev thauj khoom ntawm lub voj voog hauv kev sim, txhim kho qhov tseeb.
Auto-Ranging:Ntau DMMs tau xaiv qhov kev ntsuas kom raug.
Muaj nuj nqi ntxiv:Ntau tus qauv txhawb kev txuas ntxiv, kev ua kom muaj peev xwm, zaus, thiab ntsuas diode. 维基百科
Cov yam ntxwv no ua rau digital multimeters haum rau ob qho tib si hauv kev ua haujlwm hluav taws xob thiab kev kuaj mob siab heev.
Kev siv tswv yim ntawm Digital Multimeters
Digital multimeters yog cov cuab yeej tseem ceeb thoob plaws ntau yam kev siv:
Troubleshooting Electrical Systems:Ceev nrooj nrhiav cov luv luv, qhib circuits, thiab faulty Cheebtsam.
Kev xeem Electronics:Ntsuas cov resistors, capacitor, thiab semiconductors kom ntseeg tau tias lawv ua tau raws li cov lus qhia.
Automotive Diagnostics:Ntsuas roj teeb voltage, alternator output, thiab sensor signals.
Industrial Maintenance:Saib xyuas cov tshuab hluav taws xob tsis zoo los tiv thaiv kev ua tsis tiav. Fluke Corporation
Lawv versatility ua rau lawv indispensable nyob rau hauv kev cob qhia, chaw soj nstuam, chaw kawm ntawv, thiab nyob rau hauv tsev.
Cov Lus Qhia Kev Nyab Xeeb rau Kev Siv Digital Multimeter
Thaum ua haujlwm nrog cov hluav taws xob nyob, kev nyab xeeb yog qhov tseem ceeb:
Ib txwm pib nrog qhov tseebntsuas hom thiab ntau yam.
Siv tau zoo- ntsuas cov kev xeem coj thiab xyuas kom muaj kev sib txuas kom raug kom tsis txhob luv.
Tsis txhob ntsuas qhov hluav taws xob lossis qhov tam sim no tshaj qhov ntsuas ntsuas qhov txwv.
Rau siab- ua haujlwm voltage, xyuas kom lub cuab yeej ua tau raws li cov qauv kev nyab xeeb tsim nyog.
Txoj kev nyab xeeb kom raug tiv thaiv ob tus neeg siv thiab multimeter los ntawm kev puas tsuaj.
Xaus
Digital multimeter yog ib qho cuab yeej siv hauv kev ntsuas hluav taws xob thiab hluav taws xob. Los ntawm kev sib txuas cov haujlwm ntawm ntau lub ntsuas ib txwm siv rau hauv qhov tseeb, yooj yim -rau- nyeem ntsuas, nws tau dhau los ua qhov tseem ceeb rau cov kws tshaj lij thiab cov neeg nyiam nyiam. Txawm hais tias koj tab tom daws teeb meem hluav taws xob, kuaj cov khoom siv hluav taws xob, lossis tswj cov khoom siv hauv tsev, kev nkag siab tias lub tshuab hluav taws xob digital yog dab tsi thiab nws ua haujlwm li cas pab koj kom ntsuas qhov tseeb thiab kev txiav txim siab.
