Taw qhia & Cov Ntsiab Cai Ua Haujlwm ntawm Multimeter
taub hau
Lub taub hau ntawm ib tug multimeter yog ib tug rhiab ammeter. Lub dial ntawm lub taub hau ' meter ' yog luam tawm nrog ntau yam cim, nplai kab, thiab tus lej muaj nuj nqis. Lub cim A - V - Ω qhia tias lub ntsuas hluav taws xob no yog lub ntsuas hluav taws xob uas tuaj yeem ntsuas qhov tam sim no, qhov hluav taws xob, thiab tsis kam. Muaj ntau cov kab ntawv sau rau ntawm lub xov tooj, ntawm cov kab uas tsis sib haum xeeb nrog "Ω" ntawm sab xis kawg yog xoom, thiab sab laug kawg yog ∞. Kev faib tawm ntawm qhov ntsuas qhov ntsuas tsis sib npaug. Lub cim "-" lossis "DC" sawv cev ncaj qha tam sim no, "~" lossis "AC" sawv cev rau qhov hloov pauv tam sim no, thiab "~" sawv cev rau cov kab sib txuas ntawm qhov sib hloov tam sim no thiab ncaj qha tam sim no. Cov kab hauv qab ntawm kab kab sawv cev rau qhov ntsuas qhov tseem ceeb sib xws rau qhov sib txawv iav txoj haujlwm ntawm tus xaiv hloov.
Kuj tseem muaj lub tshuab xoom hloov kho pob qhov rooj ntawm lub 'meter' taub hau kom ntsuas tus taw tes rau sab laug xoom txoj hauj lwm.
selector hloov
Cov kev xaiv hloov ntawm lub multimeter yog ib tug multi iav teb hloov. Siv los xaiv cov khoom ntsuas thiab thaj tsam.
General multimeter ntsuas cov khoom suav nrog: "mA"; DC tam sim no, "V (-)": DC voltage, "V (~)": AC voltage, "Ω": tsis kam. Txhua yam khoom ntsuas tau muab faib ua ntau yam sib txawv rau kev xaiv.
Cwj mem thiab cwj mem socket
Tus cwj mem muab faib ua ob ntu: liab thiab dub. Thaum siv, lub xov tooj liab yuav tsum muab tso rau hauv lub qhov (socket) cim nrog "+" kos npe, thiab cov kev sojntsuam dub yuav tsum muab tso rau hauv lub qhov (socket) cim nrog "-" kos npe.
Header (tus pointer type)
Nws yog ib qho rhiab heev magneto hluav taws xob DC ammeter, thiab cov ntsuas kev ua haujlwm tseem ceeb ntawm multimeter nyob ntawm qhov ua tau zoo ntawm lub taub hau ntsuas. Lub rhiab heev ntawm lub taub hau ' meter ' hais txog tus nqi ntawm qhov ncaj qha tam sim no ntws los ntawm lub taub hau 'meter' thaum tus pointer deviates rau tag nrho cov nplai. Qhov me me no tus nqi, qhov siab dua ntawm lub taub hau meter. Qhov loj dua qhov kev tiv thaiv sab hauv thaum ntsuas hluav taws xob, nws qhov kev ua tau zoo dua. Muaj plaub kab kab ntawm lub taub hau 'meter', thiab lawv cov haujlwm yog raws li hauv qab no: (los ntawm sab saum toj mus rau hauv qab) yog cim nrog R los yog Ω, qhia txog tus nqi kuj. Thaum qhov hloov pauv nyob rau hauv ohm ntau yam, qhov ntsuas kab no tau nyeem. Lub bar yog cim nrog ∽ thiab VA, qhia txog AC thiab DC voltage thiab DC tam sim no tus nqi. Thaum qhov hloov pauv hloov pauv nyob rau hauv AC lossis DC voltage lossis DC tam sim no, thiab qhov ntau yog nyob rau hauv lwm txoj haujlwm tshwj tsis yog AC 10V, cov kab no tau nyeem. Qhov thib peb kab yog cim nrog 10V, qhia txog AC voltage tus nqi ntawm 10V. Thaum hloov pauv hloov pauv nyob rau hauv AC / DC voltage ntau thiab ntsuas qhov ntsuas ntawm 10V AC, qhov ntsuas kab no tau nyeem. Cov khoom thib plaub yog cim nrog dB, qhia txog qib suab.
