Qhov yooj yim siv pointer multimeter ntawm pointer multimeter
(1) Kev ntsuas ntawm DC tam sim no
Multimeter feem ntau muaj 1mA, 10mA, 100mA peb DC tam sim no ntau yam thaiv, kev xaiv ntawm ntau yam yuav tsum yog raws li qhov loj ntawm qhov tam sim no hauv Circuit Court. Yog tias koj tsis paub qhov luaj li cas ntawm qhov tam sim no, koj yuav tsum xub xaiv qhov ntau tshaj plaws thaiv, thiab maj mam txo mus rau qhov tsim nyog.
Thaum ntsuas DC tam sim no, thawj zaug txiav tawm qhov sib txuas ntawm lub voj voog, thiab tom qab ntawd txuas cov cwj mem multimeter ntawm ob qhov kawg ntawm qhov tawg, tus cwj mem liab txuas nrog lub breakpoint txuas nrog tus ncej zoo ntawm lub hwj huam mov, thiab tus cwj mem dub. yog txuas nrog lub breakpoint txuas mus rau qhov tsis zoo ncej ntawm lub hwj chim mov. Thaum nyeem ntawv, DC tam sim no thaiv yuav tsum nyeem tus nqi ntawm kab thib ob, yog tias koj xaiv 100mA thaiv, cov kab thib peb ntawm cov lej hauv kab kab yuav siv tau, thiab kev nyeem ntawv tuaj yeem muab faib ua 10.
(2) AC tam sim no ntsuas
Feem ntau, lub multimeter tsuas yog teeb tsa 1 mus rau 2 blocks ntawm AC tam sim no kev sim nres, thiab tsuas yog tsim nyog rau kev ntsuas lub zog hluav taws xob sab hauv los yog qhov ntsuas hluav taws xob hauv qab ntsuas muaj qhov siab impedance, zaus ntawm 3kHz hauv qab qhov tsawg zaus tam sim no. Txhawm rau kom tsis txhob cuam tshuam cov waveform thiab kev ua haujlwm ntawm lub voj voog nyob rau hauv kev sim, AC tam sim no thaiv ntawm multimeter yuav tsum tau txais symmetrical full-wave rectification.
Kev ntsuas, nyob rau hauv lub ntsuas Circuit Court mus rau hauv ib txoj hlua ntawm tus nqi qis precision sampling resistor, thiab tom qab ntawd lub multimeter's AC voltage thaiv thiab txuas nrog tus qauv resistor ntawm ob qho kawg, los ntawm kev nyeem tawm AC voltage ntawm ob qho kawg ntawm cov resistor yog hloov dua siab tshiab rau hauv qhov ntsuas hluav taws xob. tam sim no ntawm Circuit Court nyob rau hauv kev sim.
(3) Kev ntsuas voltage
Kev ntsuas ntawm AC thiab DC voltage, yuav tsum tau siv raws li AC voltage thaiv thiab DC voltage thaiv, ntau yam xaiv thiab ntsuas ntawm tib yam tam sim no. Thaum ntsuas, txuas lub multimeter nrog ntsuas Circuit Court nyob rau hauv parallel, txuas tus cwj mem liab mus rau lub ntsuas hluav taws xob thiab tus ncej zoo ntawm lub hwj huam mov, txuas tus cwj mem dub rau lub ntsuas hluav taws xob thiab qhov tsis zoo ntawm lub hwj chim, thiab nyeem tawm. tus nqi voltage.
Lus Cim: DC voltage block scale kab yog kab thib ob, nrog rau 10 thaiv, kab thib peb ntawm cov duab hauv kab kab tuaj yeem siv los nyeem tawm qhov ntsuas hluav taws xob ncaj qha.
(4) Kev ntsuas kev tiv thaiv
Multimeter feem ntau muaj R × 1, R × 10, R × 100, R × 1k, R × 10k tsib ntau yam. Ua ntej kev ntsuas, thawj ob tus cwj mem luv luv, thaum kho qhov "ohm xoom pob qhov rooj", kom tus pointer cia li mus rau sab xis ntawm ohm scale txoj hauj lwm. Txhawm rau kom ntseeg tau qhov tseeb ntawm qhov ntsuas, txhua zaus koj hloov qhov thaiv qhov sib npaug, koj yuav tsum tau ua qhov kev hloov kho ohm xoom.
Kev ntsuas, ob tus cwj mem thiab ntsuas qhov ntsuas qhov kawg ntawm kev sib cuag, saib xyuas cov ntsuas ntsuas qhov sib npaug ntawm qhov sib npaug, uas yog, tus nqi tsis kam ntawm qhov ntsuas ntsuas.
