Digital multimeter kuj tsis tuaj yeem rov pib dua rau xoom
Nias thiab tuav HOLD+RANGE cov yuam sij tib lub sijhawm rau 10 vib nas this los teeb nws rau 0.
Cov multimeters digital muaj nyob rau hauv cov khoom siv nqa tau yooj yim rau kev kuaj xyuas qhov tsis raug, nrog rau cov khoom siv tso rau ntawm qhov chaw ua haujlwm, thiab qee qhov muaj kev daws teeb meem ntawm xya lossis yim tus lej.
Digital multimeter yog ib qho khoom siv hluav taws xob siv hauv kev ntsuas hluav taws xob. Nws tuaj yeem muaj ntau yam haujlwm tshwj xeeb, tab sis nws lub luag haujlwm tseem ceeb yog ntsuas qhov voltage, tsis kam thiab tam sim no. Raws li niaj hnub multi-purpose electronic ntsuas ntsuas, cov digital multimeter feem ntau yog siv hauv physics, hluav taws xob, hluav taws xob thiab lwm yam kev ntsuas.
Cov ntaub ntawv txuas ntxiv
Kev nyab xeeb nta ntawm digital multimeters
1. Fuse tam sim no input tiv thaiv.
2. Siv lub tshuab hluav taws xob siab (600 volts lossis siab dua).
3. Kev tiv thaiv hluav taws xob siab hauv hom tsis kam (500 volts lossis siab dua).
4. Voltage transient tiv thaiv (6000 volts lossis siab dua).
5. Kev nyab xeeb tsim kev xeem coj, kev ruaj ntseg tuav, thiab lwm yam.
6. Muaj ntawv pov thawj kev nyab xeeb.
Lub ohm hloov ntawm lub multimeter tawg, yuav kho li cas?
1. Thawj yog los ntsuas qhov kev tiv thaiv ncaj qha, cia peb tham txog cov tsoos multimeter ua ntej. Teem lub pointer rau txoj hauj lwm qhia hauv daim duab (ohm txoj hauj lwm Ω). Qhov no yog txoj hauj lwm siv los ntsuas qhov tsis kam.
2. Qhov pib txoj hauj lwm 0 ntawm qhov tam sim no thiab voltage nyeem ntawv yog nyob rau sab laug, thaum pib txoj hauj lwm 0 ntawm qhov tsis kam yog nyob rau sab xis. Nrhiav qhov kev nyeem ntawv dial kab ntawm qhov tsis kam. Kev nyeem ntawv yuav tau nyeem los ntawm no tom qab.
3. Txuas ob lub tswv yim cwj mem ntawm multimeter thiab xyuas seb tus pointer taw tes rau ntawm 0 txoj hauj lwm. Yog hais tias lub multimeter tsis muaj kev hloov kho, tig mus rau xoom (yog tias nws tsis tuaj yeem hloov kho rau 0, lub roj teeb tuag)
4. Muab ob lub tswv yim cwj mem rau ntawm ob qhov kawg ntawm tus resistor ntsuas qhov kev nyeem ntawv. Dab tsi yog nyeem nyob rau lub sijhawm no yog tus nqi ntawm cov resistor. Txoj kev no tsis tuaj yeem ntsuas inductance tsis kam. Resistance nqi=iav × nyeem ntawv. Piv txwv li, yog tias lub iav yog 100Ω thiab kev nyeem ntawv yog 30, ces nws yog 3K ohms.
5. Lub digital ib qho yooj yim dua, tsuas yog teem lub iav mus rau qib ohm thiab nyeem tus nqi.
