Cov lus piav qhia ntxaws txog cov qauv thiab kev siv digital multimeterr
Multimeters, tseem hu ua multimeters, multimeters, peb-meters, multimeters, thiab lwm yam, yog qhov tseem ceeb ntsuas ntsuas hauv hluav taws xob hluav taws xob thiab lwm lub tuam tsev. Feem ntau, lub hom phiaj tseem ceeb yog ntsuas qhov voltage, tam sim no thiab tsis kam.
Multimeters muab faib ua pointer multimeters thiab digital multimeters raws li cov qauv qhia. Nws yog ib qho kev ntsuas ntau yam thiab ntau yam ntsuas. Feem ntau, lub multimeter tuaj yeem ntsuas DC tam sim no, DC voltage, AC tam sim no, AC voltage, tsis kam thiab suab qib, thiab lwm yam, thiab qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance thiab semiconductor. Qee qhov ntsuas (xws li ) thiab lwm yam.
Lub multimeter yog ib qho cuab yeej magnetoelectric nrog lub rectifier uas tuaj yeem ntsuas ntau yam hluav taws xob xws li AC thiab DC tam sim no, voltage thiab tsis kam. Rau txhua qhov hluav taws xob ntau, feem ntau muaj ntau ntau yam.
Kuj tseem hu ua multimeter lossis multimeter luv luv. Lub multimeter yog tsim los ntawm magnetoelectric ammeter (meter taub hau), ntsuas Circuit Court thiab xaiv hloov. Ntau yam kev ntsuas hluav taws xob tuaj yeem ntsuas tau yooj yim los ntawm kev hloov pauv kev xaiv. Lub hauv paus tseem ceeb ntawm nws txoj kev xam Circuit Court yog kaw Circuit Court Ohm txoj cai. Muaj ntau hom multimeters, thiab lawv yuav tsum tau xaiv raws li cov kev cai sib txawv thaum siv lawv.
Multimeter Siv lub MF30 pointer multimeter thiab DT840 digital multimeter ua piv txwv kom nkag siab txog lawv cov qauv thiab kev ua haujlwm, kawm paub siv cov multimeter kom raug ntsuas hluav taws xob xws li voltage, tam sim no, thiab tsis kam, thiab paub txog kev ceev faj rau kev siv.
pointer multimeter
1. Cov qauv ntawm pointer multimeter
Nws yog tsim los ntawm peb qhov chaw: lub taub hau meter, ntsuas Circuit Court thiab hloov pauv hloov.
Thaum siv lub pointer multimeter, xyuam xim rau cov ntsiab lus hauv qab no:
(1) Ua ntej siv, lub ntsuas ntsuas ntsuas yuav tsum xoom.
(2) Ua ntej ntsuas, qhov hloov pauv yuav tsum tig mus rau txoj haujlwm tsim nyog raws li cov khoom thiab qhov loj ntawm qhov ntsuas hluav taws xob.
(3) Tom qab kev ntsuas, qhov hloov pauv yuav tsum tau tig mus rau qhov siab tshaj plaws AC voltage ntau, thiab qee qhov multimeters (xws li 500 qauv) yuav tsum tig mus rau qhov nruab nrab txoj hauj lwm cim nrog ".".
2. Kev ntsuas ntawm AC voltage
(1) Ua ntej ntsuas, tig qhov hloov mus rau qhov sib thooj AC voltage ntau. Yog tias qhov voltage yuav tsum ntsuas tsis tau paub ua ntej, qhov ntau yuav tsum nyob rau theem siab tshaj plaws kom tsis txhob muaj kev puas tsuaj rau lub 'meter'.
(2) Thaum ntsuas, txuas qhov kev xeem coj mus rau qhov sib npaug rau ob qhov kawg ntawm lub voj voog nyob rau hauv kev sim lossis cov khoom hauv kev sim. Nws yog nruj me ntsis txwv tsis pub toggle hloov mus xaiv qhov ntau thaum ntsuas.
(3) Thaum ntsuas qhov hluav taws xob, txhim kho tus cwj pwm ntawm kev ua haujlwm ib leeg thiab mloog zoo rau nws.
(4) Txij li thaum lub ntsuas hluav taws xob AC ntawm lub xov tooj yog ntsuas raws li qhov sib txawv ntawm qhov hluav taws xob sinusoidal, yog tias ntsuas lub zog tsis yog sinusoidal, qhov yuam kev yuav loj.
(5) Qhov ntau zaus ntawm kev ntsuas AC voltage feem ntau yog 45HZ∽1000HZ, yog tias nws tshaj qhov ntau, qhov yuam kev yuav nce.
3. Kev ntsuas ntawm DC voltage
Txoj kev ntsuas yog qhov pib zoo ib yam li ntawm AC voltage, tab sis ob lub ntsiab lus hauv qab no yuav tsum tau sau tseg:
(1) Ib yam li ntsuas AC voltage, qhov hloov pauv yuav tsum tau teem rau lub iav ntawm DC voltage ua ntej ntsuas. Yog tias qhov voltage yuav tsum ntsuas tsis paub ua ntej, qhov ntau yuav tsum loj dua li me; Lub voj voog txuas nrog rau qhov sib npaug, thiab nws tsis raug tso cai rau toggle hloov pauv hloov thaum ntsuas.
(2) Thaum ntsuas, koj yuav tsum tau ua tib zoo saib xyuas qhov zoo thiab qhov tsis zoo ntawm qhov kev xeem coj. Cov hlau lead kuaj liab txuas nrog lub siab muaj peev xwm kawg ntawm Circuit Court nyob rau hauv kev sim, thiab cov hlau lead kuaj dub txuas nrog rau qhov tsis muaj peev xwm kawg. Yog hais tias qhov kev xeem coj rov qab, tus pointer ntawm lub taub hau meter yuav tig rov qab, thiab nws yooj yim rau khoov tus pointer. Yog tias koj tsis paub qhov muaj peev xwm ntawm qhov ntsuas qhov ntsuas, koj tuaj yeem maj mam kov qhov kev xeem coj mus rau qhov ntsuas ntsuas. Yog tias tus pointer thim rov qab, nws txhais tau hais tias qhov polarity ntawm qhov kev xeem coj yog thim rov qab, tsuas yog hloov qhov kev xeem coj.
4. Kev ntsuas ntawm DC tam sim no
(1) Thaum ntsuas, lub multimeter yuav tsum tau txuas nrog hauv series mus rau hauv Circuit Court nyob rau hauv kev sim thiab tsis tuaj yeem txuas rau tib lub sijhawm.
(2) Ua tib zoo saib xyuas qhov zoo thiab qhov tsis zoo ntawm qhov kev xeem coj. Thaum ntsuas, cov hlau kuaj liab txuas nrog lub siab muaj peev xwm kawg ntawm lub voj voog tawg, thiab cov hlau lead kuaj dub txuas nrog qhov kawg ntawm qhov kawg.
(3) Thaum qhov ntsuas tam sim no tsis paub, qhov ntsuas yuav tsum loj dua li qhov me me. Nws yog nruj me ntsis txwv tsis pub toggle hloov mus xaiv qhov ntau thaum ntsuas.
5. Kev ntsuas ntsuas
(1) Ua kom raug xaiv cov ntaub ntawv tiv thaiv ntau ntxiv, kom tus taw tes kom ze li sai tau rau qhov chaw geometric ntawm qhov ntsuas, uas tuaj yeem txhim kho qhov tseeb ntawm cov ntaub ntawv ntsuas.
(2) Nws yog nruj me ntsis txwv tsis pub ntsuas kev tiv thaiv thaum lub Circuit Court nyob rau hauv kev ntsuam xyuas raug them.
(3) Thaum ntsuas, txuas ncaj qha mus rau qhov kev xeem coj hla ob qhov kawg ntawm qhov ntsuas tsis kam lossis Circuit Court. Ceev faj tsis txhob kov ob qhov kawg ntawm kev tawm tsam nrog koj txhais tes tib lub sijhawm, kom tsis txhob muaj kev cuam tshuam ntawm tib neeg lub cev tiv thaiv ntawm kev nyeem ntawv.
(4) Thaum ntsuas lub thermistor, nws yuav tsum tau muab sau tseg tias cov nyhuv thermal ntawm qhov tam sim no yuav hloov qhov tsis kam ntawm lub thermistor.
