Yuav siv digital multimeter li cas thiab ceev faj
(1) Thaum ntsuas qhov tsis kam, qhov ntsuas tsis tuaj yeem tsis muaj ceg sib npaug. Nws yog qhov zoo tshaj plaws kom tshem tawm qhov ntsuas tsis kam ntawm lub Circuit Court (tsawg kawg yog ib qho kawg yog txiav tawm ntawm kab) ua ntej ntsuas. Polar ntsiab xws li transistors thiab electrolytic capacitors nyob rau hauv kev sim
Thaum kuaj xyuas qhov sib npaug ntawm cov khoom siv, kev saib xyuas yuav tsum tau them rau qhov polarity ntawm ob qhov kev xeem coj. Lub multimeter digital muaj ob txoj kev xeem, liab thiab dub. Cov hlau kuaj liab yog tus ncej zoo ntawm lub roj teeb sab hauv, thiab cov hlau kuaj dub yog tus ncej tsis zoo ntawm lub roj teeb sab hauv.
(2) Thaum ntsuas qhov hluav taws xob, txuas cov digital multimeter nyob rau tib lub sijhawm mus rau ob qhov kawg ntawm Circuit Court nyob rau hauv kev sim; Thaum ntsuas tam sim no, txuas lub multimeter nyob rau hauv series nrog lub Circuit Court nyob rau hauv kev sim.
(3) Thaum siv digital multimeter los ntsuas DC Circuit Court, qhov polarity tuaj yeem pom tau.
(4) Thaum ntsuas AC Circuit Court, tsuas yog qhov voltage thiab tam sim no ntawm sinusoidal AC ntsuas tau, thiab ob qhov kev xeem coj ntawm digital multimeter tsis muaj qhov sib txawv ntawm qhov zoo thiab qhov tsis zoo.
(5) Ua ntej digital multimeter ntsuas qhov tsis kam, ob qhov kev xeem coj yuav tsum tau luv luv, thiab tus nqi yuam kev yuav tsum tau sau tseg. Tom qab kev ntsuas, qhov ntsuas qhov tseeb yog tau los ntawm kev rho tawm thawj qhov yuam kev ntawm tus nqi ntsuas.
(6) Ua ntej lub digital multimeter ntsuas lub peev xwm, ob qhov kawg ntawm lub capacitor yuav tsum tau luv luv ua ntej, thiab lub capacitor yuav tsum raug tso tawm kom ntseeg tau tias kev nyab xeeb ntawm tus kheej thiab cov multimeter digital yuav tsis raug puas tsuaj. Tom qab kev ntsuas tiav, lub capacitance kuj yuav tsum tau
Tshem tawm, kom tsis txhob faus tej zaum yuav muaj kev phom sij.
(7) Thaum lub digital multimeter qhia "BATT" lossis "LOWBAT", nws txhais tau hais tias lub roj teeb sab hauv hluav taws xob qis dua qhov ua haujlwm voltage, thiab lub roj teeb yuav tsum tau hloov lub sijhawm no. Yog tias qhov ntsuas tseem ua tiav, qhov ntsuas tus nqi yuav siab dua tus nqi tiag tiag
Nyob rau sab siab.
(8) Thaum lub iav txoj hauj lwm ntawm cov multimeter yog siv tsis raug, lub hauv paus tiv thaiv Circuit Court yuav siv tau, thiab cov zaub yuav tso saib "000", los yog tus naj npawb ntawm txoj hauj lwm qis yuav flash.
(9) Nws yog txwv tsis pub hloov qhov ntau thaum ntsuas qhov hluav taws xob siab (siab dua 220V) lossis qhov hluav taws xob siab (siab tshaj 0.5A), txhawm rau tiv thaiv arcing thiab hlawv ntawm kev sib cuag.
(10) Lub tshuab hluav taws xob digital tuaj yeem nyeem ncaj qha rau qhov ntsuas qhov ntsuas hluav taws xob, qhov tam sim no, thiab qhov tsis kam ntawm lub vijtsam LCD, tab sis koj yuav tsum tau them sai sai rau qhov ntsuas ntsuas ntawm sab xis ntawm lub vijtsam. Yog tias qhov hloov ntawm digital multimeter
Muaj tsis tau tsuas yog xaiv cov khoom xeem, tab sis kuj hloov dua siab tshiab ntawm ntau yam. Qhov ntsuas ntsuas tus nqi yog me me, tab sis chav tsev loj, qhia tias qhov kev xaiv ntau yam loj dhau, thiab nws yuav tsum tau hloov mus rau qhov me me rau kev ntsuas. Yog tias qhov ntsuas tus nqi siab tshaj tus nqi siab tshaj plaws ntawm qhov kev xaiv, lub multimeter tsuas yog tso saib tus lej "1" hauv tus lej siab tshaj plaws, thiab nws yuav tsum tau hloov mus rau qhov loj dua rau kev ntsuas. Hauv qee qhov digital multimeters, tsuas yog cov khoom xeem tuaj yeem xaiv tau ntawm qhov hloov pauv, tab sis tsis muaj qhov hloov pauv ntau. Thaum ntsuas, lub multimeter tau hloov pauv mus rau qhov tsim nyog raws li qhov loj ntawm qhov ntsuas ntsuas, thiab kev nyeem ntawv yooj yim dua.
(11) Thaum lub sij hawm xeem ntawm lub multimeter, tsis txhob kov cov hlau ib feem ntawm cov hlau lead nrog koj txhais tes. Ntawm ib sab, nws tuaj yeem ua kom qhov tseeb ntawm qhov ntsuas, thiab ntawm qhov tod tes, nws tuaj yeem ua kom muaj kev nyab xeeb ntawm tus kheej. Thaum ntsuas qhov hluav taws xob siab tshaj 100V, siv ib txhais tes thaum twg los tau.
(12) Qee qhov digital multimeters muaj qhov tsis siv neeg kaw, tab sis qee qhov digital multimeters tsis muaj qhov no. Tom qab siv, nco ntsoov tig lub hwj chim hloov mus rau qhov chaw tawm kom txuag tau roj teeb.
(13) Cov zis hluav taws xob ntawm lub tshuab hluav taws xob digital yog qhov tsawg, thiab nws tsis yooj yim rau kev sim qee yam khoom siv hluav taws xob tshwj xeeb (xws li thyristors, lub teeb-emitting diodes, thiab lwm yam).
(14) Txij li cov digital multimeter siv lub tshuab hluav taws xob ua haujlwm sab hauv, qhov kev tiv thaiv sab hauv ntawm qhov ntsuas hluav taws xob yog qhov loj heev, yam tsawg kawg hauv qib megohm, uas tsis tshua muaj kev cuam tshuam rau hauv Circuit Court hauv kev sim thiab muaj qhov ntsuas qhov tseeb, tab sis qhov tsis tshua muaj tshwm sim. siab tso zis impedance ua rau nws yooj yim rau cuam tshuam los ntawm induced voltage, cov ntaub ntawv ntsuas yuav deviate nyob rau hauv tej lub sij hawm uas cov electromagnetic cuam tshuam yog kuj muaj zog.
