Qauv Taw Qhia ntawm Analog Multimeter
Muaj ntau hom pointer multimeters, tab sis lawv cov qauv yooj yim zoo sib xws. Cov qauv ntawm tus pointer multimeter feem ntau muaj peb ntu: lub taub hau meter, qhov hloov pauv (tseem hu ua tus xaiv hloov), thiab ntsuas Circuit Court.
Lub taub hau ' meter ' txais yuav lub tshuab hluav taws xob magneto rhiab heev, uas yog cov khoom siv rau kev ntsuas; Lub header ntawm multimeter yog qhov tseeb ammeter rhiab heev. 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. Tsis tas li ntawd, muaj qee cov cim ntawm lub dial qhia txog qhov tsis sib xws ntawm lub ntsuas lub taub hau, xws li DC 20K Ω / V, AC 9K Ω / V, thiab lwm yam. Kuj tseem muaj lub tshuab xoom hloov kho pob qhov rooj (ntsia hlau) ntawm lub taub hau los kho tus pointer rau xoom ntawm sab laug kawg.
Kev hloov pauv hloov pauv yog siv los xaiv hom thiab ntau yam (lossis magnification) ntawm qhov ntsuas hluav taws xob: Kev xaiv hloov ntawm multimeter yog ntau lub iav teb hloov. Siv los xaiv cov khoom ntsuas thiab thaj tsam (lossis magnifications). Cov khoom ntsuas dav dav ntawm multimeter suav nrog: "mA" rau DC tam sim no, "V" rau DC voltage, "V ~" rau AC voltage, thiab "Ω" rau qhov tsis kam. Txhua yam khoom ntsuas tau muab faib ua ntau yam sib txawv (lossis magnifications) rau kev xaiv.
Kev ntsuas hluav taws xob hloov hluav taws xob ntsuas ntawm cov khoom sib txawv thiab qhov ntau thiab tsawg rau hauv qhov ncaj qha tam sim no uas lub ntsuas tau txais. Daim duab 1 qhia txog qhov pom ntawm MF-47 multimeter, uas tuaj yeem ntsuas ntau yam hluav taws xob xws li DC tam sim no, DC voltage, AC voltage, thiab tsis kam. Thaum hloov pauv hloov mus rau DC tam sim no hom, nws tuaj yeem txuas rau 5 lub ntsiab lus sib cuag, siv rau DC tam sim no ntsuas nyob rau hauv thaj tsam ntawm 500mA, 50mA, 5mA, 0.5mA, thiab 50 μ A. Ib yam li ntawd, thaum hloov pauv hloov mus rau qhov ntau ntawm ohm, qhov kev tiv thaiv tuaj yeem ntsuas 0 x 1 x 0, magnifications 1K Ω, thiab x 10K Ω, feem; Thaum hloov pauv hloov mus rau DC voltage ntau, nws tuaj yeem siv rau kev ntsuas DC voltage hauv thaj tsam ntawm 0.25V, 1V, 2.5V, 10V, 50V, 250V, 500V, thiab 1000V; Thaum hloov pauv hloov mus rau AC voltage hom, nws tuaj yeem siv los ntsuas AC voltage hauv thaj tsam ntawm 10V, 50V, 250V, 500V, thiab 1000V.
