Multimeter ntsuas qhov zoo ntawm peb-theem lub cev muaj zog
Ua ntej, siv multimeter los ntsuas qhov DC tsis kam ntawm peb-theem winding. [Qhov tseeb, qhov tsis kam ntawm winding yog me me, thiab peb tuaj yeem pom qhov loj ntawm cov 'meter'. Tshwj tsis yog nws yog lub cev muaj zog me me, tsuas yog xyuas seb nws puas txuas nrog.]
Qhov thib ob, yog tias peb-theem windings yog tag nrho txuas nrog, tom qab ntawd siv ib lub xaim ntawm megger los txuas lub plhaub lub cev muaj zog, thiab lwm cov hlau los ntsuas seb qhov kev tiv thaiv ntawm peb-theem windings rau hauv av yog qhov qub, [qhov tsawg kawg nkaus kuj. tus nqi yuav tsum tsis txhob qis dua 0.5 megohms]
Thib peb, yog tias qhov kev tiv thaiv ntawm peb-theem windings rau hauv av yog qhov qub, cov kauj ruam kawg yog ntsuas qhov rwb thaiv tsev ntawm cov theem. Koj txuas ib lub xaim ntawm lub 'meter' mus rau lub davhlau ya nyob twg ntawm ib theem winding, thiab lwm yam mus rau lwm cov xov hlau. Kem, [yuav tsum ceev faj tsis txhob txuas ob lub tib lub sijhawm, txuas lawv sib cais] Tom qab kev ntsuas, ntsuas lub windings ntawm ob theem los ntawm kev sib hloov cov 'meter' xov hlau raws li [tus txheej txheem ntawm kev ntsuas ntawm theem tsuas yog ntsuas lub siab lossis qis dua 3 binding posts, tus nqi kuj tsis tsawg dua 0.5 megohms].
Clamp ib qho ntawm ob qhov kev xeem coj ntawm lub shaker ntawm lub davhlau ya nyob twg thaiv ntawm lub thawv sib txuas, thiab lwm qhov ntawm lub plhaub, co tus kov ntawm shaker sib npaug, thiab kev nyeem ntawv tau txais yog cov rwb thaiv tsev ntawm lub cev muaj zog rau hauv av, feem ntau nyob ib ncig ntawm 200K ~ 2M yog tsim nyog.
Clamp ob qhov kev xeem coj ntawm lub shaker ntawm lub terminals ntawm ntau theem ntawm lub hlws ris lub thawv feem, co tus kov ntawm shaker tusyees, thiab kev nyeem ntawv tau txais yog lub rwb thaiv tsev tsis kam ntawm cov theem ntawm lub cev muaj zog. Feem ntau tshaj 100K yog tsim nyog.
Vim li cas tsis tuaj yeem ntsuas lub cev muaj zog nrog multimeter, thiab yuav tsum siv lub shaker?
Vim tias lub zog siv hluav taws xob siv los ntsuas qhov kev tiv thaiv hauv lub multimeter yog txog 9V, thiab lub cev muaj zog ua haujlwm nyob rau hauv AC voltage ntawm 220V lossis 380V, thiab nws cov mem tes peak yoj mus txog ntau dua 500 volts. Lub hwj chim mov voltage ntawm lub megohmmeter (shaking meter) yog 500V. Ntev npaum li qhov xau tam sim no ntawm theem thiab theem thiab nruab nrab ntawm theem thiab hauv av ntawm lub kauj yog tsis muaj zog (xws li capacitive tam sim no) nyob rau hauv qhov voltage ntawm 500V, lub cev muaj zog yog tsim nyog.
Ordinary multimeters tsuas tuaj yeem ntsuas kaum tawm txhiab ohms ntawm qhov tsis kam (tus pointer yog qhov tseeb tshaj plaws nyob rau hauv thaj tsam ntawm 1/3-2/3 ntawm lub dial), siv nws los ntsuas qhov tsis kam ntawm megohms, koj tsis txawm pom. Yog hais tias tus cwj mem txav mus (Thaum lub multimeter ntsuas tsis kam, nws qhov ntsuas tsis sib npaug, ntau pua txhiab ohms tsuas yog nyob hauv txoj haujlwm me me ntawm sab xis ntawm lub xov tooj).
1. Tus nqi ntawm lub multimeter flashes, uas tsis paub tseeb li co lub meter. Yog li ntawd, thaum kho lub cev muaj zog, ua ntej siv lub multimeter los kwv yees, thawj qhov ntsuas, seb qhov peb-theem tsis kam yog sib npaug, thiab siv lub shaker los tshem tawm cov kauj.
2. Lub multimeter feem ntau xyuas seb cov hlau puas raug txiav thiab cov coil raug hlawv. Co lub 'meter' los ntsuas cov theem-rau-theem rwb thaiv tsev thiab hauv av rwb thaiv tsev.
Kev ceev faj rau kev siv lub shaker
Megohmmeter, tseem hu ua co rooj. Nws yog ib qho cuab yeej siv los ntsuas tus nqi rwb thaiv tsev ntawm cov khoom siv hluav taws xob xws li cov kab, cables, motors, thiab lwm yam. Nws chav ua haujlwm yog megohm (MΩ), yog li nws muaj npe megger. Nws muaj ob ntu, tes-cranked DC generator thiab lub taub hau ntsuas.
Nws feem ntau muaj peb qhov kev faib hluav taws xob: DC500V, DC1000V, thiab DC2500V. Peb cov kws tshaj lij tau koom nrog hauv pej xeem thiab 380v cov kab kev lag luam feem ntau siv DC500V megohmmeters.
Peb yuav tsum xyuam xim rau cov khoom hauv qab no thaum siv megohmmeter:
1. Lub megohmmeter yuav tsum muab tso rau kab rov tav thaum siv;
2. Lub megohmmeter nrog rau qhov sib thooj voltage yuav tsum raug xaiv raws li qhov voltage theem ntawm cov khoom yuav tsum tau kuaj, thiab nws yuav tsum tsis txhob cia siab heev los yog tsawg heev;
3. Thaum tig lub megohmmeter, tes-crank ceev yuav tsum ncav cuag 125r / min los ntawm qeeb mus rau ceev, thiab nyeem ntawv ntau tshaj 1min;
4. Rau cov cables lossis lub cev muaj zog windings uas tau ntsuas, lawv yuav tsum tau luv luv thiab tso tawm ua ntej lawv tuaj yeem kov.
