Kev ntsuas qhov yuam kev thiab kev xaiv ntawm Multimeter Range
Yuav muaj qee qhov yuam kev thaum ntsuas nrog multimeter. Qee qhov yuam kev no yog qhov yuam kev siab tshaj plaws uas tau tso cai los ntawm cov chav kawm raug ntawm lub 'meter' nws tus kheej. Qee qhov yog tib neeg yuam kev los ntawm kev hloov kho thiab siv tsis raug. Ua kom nkag siab cov yam ntxwv ntawm multimeter thiab qhov ua rau ntsuas qhov yuam kev, thiab paub txog cov txheej txheem ntsuas thiab cov txheej txheem kom raug, koj tuaj yeem txo qhov ntsuas qhov yuam kev.
Tib neeg kev nyeem ntawv yuam kev yog ib qho laj thawj uas cuam tshuam rau kev ntsuas qhov tseeb. Nws yog kev zam tsis tau tab sis tuaj yeem txo qis. Yog li ntawd, tshwj xeeb yuav tsum tau them rau cov ntsiab lus hauv qab no thaum siv: 1. Muab lub multimeter kab rov tav ua ntej ntsuas, thiab ua txhua yam zeroing; 2. Khaws koj ob lub qhov muag perpendicular rau lub pointer thaum nyeem ntawv; Thaum qhov kev hloov kho tsawg dua xoom, hloov lub roj teeb nrog ib qho tshiab; 4. Thaum ntsuas qhov kev tiv thaiv lossis qhov hluav taws xob siab, tsis txhob tuav cov hlau ib feem ntawm cov hlau lead nrog koj txhais tes, kom tsis txhob shunting ntawm tib neeg lub cev tsis kam, nce kev ntsuas yuam kev lossis hluav taws xob poob siab; 5. Thaum ntsuas qhov kev tiv thaiv nyob rau hauv RC Circuit Court, koj yuav tsum txiav tawm lub hwj chim mov nyob rau hauv lub Circuit Court, thiab tso cov hluav taws xob nyob rau hauv lub capacitor ua ntej ntsuas. Tom qab tsis suav nrog tib neeg kev nyeem ntawv yuam kev, peb ua qee qhov kev soj ntsuam ntawm lwm qhov yuam kev.
1. Multimeter Voltage, Kev xaiv ntau yam tam sim no thiab ntsuas qhov yuam kev
Qhov tseeb theem ntawm multimeter feem ntau muab faib ua ntau theem xws li {{0}}.1, 0.5, 1.5, 2.5, thiab 5. Rau DC voltage, tam sim no, AC voltage, tam sim no thiab lwm yam iav, calibration ntawm qhov raug (qhov tseeb) theem yog qhia los ntawm feem pua ntawm qhov siab tshaj plaws qhov yuam kev tsis txaus siab △X thiab tag nrho cov nqi ntawm qhov kev xaiv. Qhia los ntawm cov mis: A feem pua =(△X/tag nrho tus nqi) × 100 feem pua ... 1
2. Kev xaiv ntau yam thiab ntsuas qhov yuam kev ntawm hluav taws xob thaiv
Txhua qhov kev tiv thaiv hluav taws xob tuaj yeem ntsuas qhov ntsuas tus nqi ntawm 0 mus rau ∞. Qhov ntsuas ntsuas ntawm ib qho ohmmeter yog qhov tsis-linear, tsis sib xws, inverted scale. Nws yog qhia raws li ib feem pua ntawm lub arc ntev ntawm lub teev. Tsis tas li ntawd, qhov kev tiv thaiv sab hauv ntawm txhua qhov sib npaug yog sib npaug ntawm qhov sib npaug ntawm qhov nruab nrab ntawm tus lej ntawm qhov ntev ntawm qhov ntsuas, uas yog hu ua "central resistance". Ntawd yog hais tias, thaum ntsuas qhov kev tiv thaiv yog sib npaug rau qhov nruab nrab ntawm qhov kev xaiv, qhov tam sim no ntws hauv Circuit Court yog ib nrab ntawm tag nrho cov ntsuas tam sim no. Tus pointer qhia qhov nruab nrab ntawm qhov ntsuas.
