Yuav ua li cas kom raug siv lub multimeter los ntsuas?
Kev ua haujlwm ntawm multimeter DC tam sim no ntsuas: ntxig cov hlau kuaj liab rau hauv lub jack nrog "ntxiv", thiab ntxig cov xim dub rau hauv lub tsho nrog "-". . Tig lub hloov dua siab tshiab rub lub pob qhov rooj mus rau qhov yuav tsum tau muaj nyob rau hauv lub tam sim no muaj nuj nqi thaiv, thiab txuas cov kev xeem coj nyob rau hauv series nyob rau hauv Circuit Court yuav tsum tau kuaj nyob rau hauv qhov tseeb txoj kev.
Kev ntsuas hluav taws xob AC thiab DC: Ntxig qhov kev xeem coj mus rau tib txoj kev raws li saum toj no, tig lub pob khawm hloov mus rau txoj haujlwm xav tau, thiab txuas ob qhov kawg ntawm qhov kev xeem coj mus rau ob qhov kawg ntawm qhov ntsuas hluav taws xob.
Kev ntsuas qhov tsis kam: ntxig rau qhov kev sim ua tib yam li saum toj no, kho lub pob qhov hloov mus rau hluav taws xob tsis kam, thawj zaug luv luv ntawm ob qhov kev xeem coj, tus pointer deflects mus rau tag nrho cov teev, thiab maj mam kho qhov "Ω xoom potentiometer" hloov pob qhov rooj ua kom tus pointer taw tes rau xoom ohms, tom qab ntawd Kov ob qhov kawg ntawm qhov kev sim cov hlau lead nrog ob qhov kawg ntawm qhov tsis kam ntsuas.
Kev siv cov multimeter kom raug: Tsuas yog siv cov multimeter kom raug tuaj yeem ua kom qhov tseeb ntawm qhov ntsuas tau yam tsis muaj kev puas tsuaj rau lub ntsuas. Kev ceev faj yuav tsum tau them thaum siv: Ua ntej txhua qhov kev ntsuas, lub multimeter yuav tsum tau muab tso rau hauv kab rov tav, thiab saib seb tus pointer taw tes rau xoom. Kev kuaj liab thiab dub yuav tsum raug muab tso rau hauv lub jack ntawm multimeter. Lub qhov rooj rub lub qhov rooj yuav tsum muab tso rau ntawm qhov chaw thaiv qhov ntsuas hluav taws xob kom ntsuas, thiab yuav tsum tsis txhob muab qhov yuam kev.
Yog tias koj tsis paub qhov kwv yees ntawm qhov ntsuas qhov ntsuas hluav taws xob thiab qhov ntsuas tam sim no, koj yuav tsum xub siv qhov siab tshaj plaws voltage ntau thiab qhov siab tshaj plaws tam sim no ntawm lub ntsuas ntsuas, thiab tom qab ntawd siv qhov tsim nyog rau kev ntsuas.
Yog tias koj tsis paub qhov zoo thiab qhov tsis zoo ntawm lub voj voog nyob rau hauv qhov kev sim, koj tuaj yeem muab lub qhov hloov pauv rub lub pob qhov rooj ntawm lub iav siab tshaj plaws, kov lub voj voog nyob rau hauv kev sim maj mam nrog tus cwj mem ntsuas thaum ntsuas, thiab saib xyuas qhov deflection ntawm tus taw tes. nyob rau tib lub sijhawm, txhawm rau txiav txim siab qhov zoo thiab qhov tsis zoo ntawm lub voj voog. Yog tias koj tsis paub tias qhov voltage yuav tsum ntsuas yog AC lossis DC voltage, koj tuaj yeem kwv yees nws qhov siab tshaj plaws ntawm AC voltage kom tau txais qhov kwv yees li ntawm qhov voltage, thiab tom qab ntawd ntsuas nws nrog DC voltage theem nrog ib qho yam tsim nyog. Deflection, nws tau txiav txim siab tias qhov voltage yog AC voltage, thiab yog tias muaj kev nyeem ntawv, nws yog DC voltage. Thaum ntsuas qhov tam sim no thiab qhov hluav taws xob, qhov tseeb ntau yam yuav tsum ua tus taw tes rau ntawm lub taub hau 'meter' qhia ib txoj hauj lwm ntau dua li ib nrab ntawm qhov ntau, thiab qhov kev ua yuam kev ntawm qhov tshwm sim ntawm lub sijhawm no yog me me.
Thaum ntsuas qhov hluav taws xob, them nyiaj ntau dua rau txoj haujlwm ntawm lub pob qhov rooj, thiab tsis txhob muab tso rau ntawm qhov tam sim no lossis hluav taws xob thaiv. Txwv tsis pub, lub taub hau 'meter' yuav raug puas tsuaj, thiab txhais tes ntawm lub 'meter' yuav khoov yog tias nws yog lub teeb, thiab cov khoom siv hluav taws xob ntawm lub tshuab hluav taws xob los yog cov plaub hau thiab deflection coil yuav raug hlawv yog tias nws loj heev. Thaum ntsuas qhov muaj txiaj ntsig zoo, tsis txhob kov ob qhov kawg ntawm qhov kev tawm tsam nrog ob txhais tes, thiaj li tsis mus txuas cov kev tawm tsam ntawm tib neeg lub cev nyob rau tib lub sijhawm rau qhov tsis kam ntsuas.
Thaum ntsuas qhov kev tiv thaiv tau nruab rau ntawm qhov ntsuas, lub zog ntawm qhov ntsuas yuav tsum raug muab tua, thiab ib qho kawg ntawm qhov kev tawm tsam yuav tsum tau welded deb ntawm lub voj voog ua ntej ntsuas. Yog hais tias muaj lub capacitor nrog lub peev xwm loj nyob rau hauv ib feem ntawm lub Circuit Court yuav tsum tau kuaj, lub capacitor yuav tsum tau tawm ua ntej ntsuas.
Thaum ntsuas qhov tsis kam, lub pob qhov zero-ohm yuav tsum tau hloov kho txhua lub sijhawm hloov pauv. Yog tias pom tias kev kho qhov xoom ohm pob qhov rooj tsis tuaj yeem ua rau lub pointer taw tes rau xoom ohm, lub pob qhov rooj yuav tsum tsis txhob sib zog, tab sis yuav tsum tau hloov lub roj teeb tshiab. Thaum nyeem ntawv, saib tus pointer ntsug nrog ob lub qhov muag, thiab yuav tsum tsis txhob squint.
Thaum txuag lub multimeter, muab qhov hloov pauv ntawm lub xov tooj ntawm lub iav siab tshaj plaws rau AC tam sim no thiab qhov hluav taws xob. Lub roj teeb yuav tsum raug tshem tawm ntawm lub moos thaum tsis siv sijhawm ntev. Lub multimeter yuav tsum muab tso rau hauv qhov chaw qhuav, qhov cua thiab huv si.
Digital Multimeter
A multimeter that uses digital display to measure the value of electrical parameters is called a digital multimeter. Its measurement principle is completely different from that of an analog multimeter, so its structure and usage are also different. It has high sensitivity and accuracy, clear and intuitive display, stable performance, strong overload capacity and easy to carry. How to use: Although the digital multimeter adopts overvoltage protection and overcurrent protection, it is still necessary to prevent operational errors (such as measuring voltage with current block or electric block). Before measuring, carefully check whether the position of the range switch meets the requirements. Pay attention during use; Do not place the digital multimeter in a high temperature (>40°C), high temperature (relative humidity>80 feem pua), los yog txias (<0°c) environment,="" so="" as="" not="" to="" damage="" the="" lcd="">
Nws yog nruj me ntsis txwv tsis pub rub qhov hloov pauv thaum ntsuas (voltage> 220V, tam sim no> 0.5A) txhawm rau tiv thaiv arcing.
Tsis txhob siv roj teeb lossis multimeter tiv thaiv los xyuas seb lub LCD puas zoo lossis phem.
Tsis txhob qhib lub hau rov qab ntawm lub multimeter los yog disassemble cov khoom ntawm lub siab nyiam. Muaj cov ntawv txhuas txau rau sab hauv ntawm lub hau, tsis txhob muab nws tawm, thiab tsis txhob tawg qhov "com" kev sib txuas hauv qab nws.
