Kev siv cov multimeter / megohmmeter kom raug
1. Lub megohmmeter yuav tsum tau muab tso rau hauv kab rov tav ntawm qhov chaw ruaj khov thiab ruaj khov kom tsis txhob ntsuas qhov yuam kev vim yog jitter thiab qaij thaum tuav.
2. Cov kab hluav taws xob yuav tsum raug. Lub megohmmeter muaj peb txoj hlua txuas, "E" (hauv av), "L" (kab) thiab "G" (lub nplhaib tiv thaiv lossis thaiv lub davhlau ya nyob twg). Lub luag haujlwm ntawm lub nplhaib tiv thaiv yog txhawm rau tshem tawm cov kev cuam tshuam ntawm cov xau ntawm "L" thiab "E" cov ntsiab lus ntawm lub ntsej muag ntawm lub ntsej muag saib thiab cov dej ntws tawm ntawm qhov ntsuas qhov ntsuas. Thaum ntsuas qhov rwb thaiv tsev ntawm cov khoom siv hluav taws xob rau hauv av, "L" siv tib lub xaim txuas mus rau ib feem ntawm cov khoom siv los ntsuas, thiab "E" siv ib lub xaim los txuas rau cov khoom siv plhaub; Piv txwv li, thaum ntsuas cov rwb thaiv tsev tiv thaiv ntawm ob lub windings hauv cov khoom siv hluav taws xob, txuas "L" thiab "E" txuas nrog lub terminals ntawm ob lub windings feem; Thaum ntsuas qhov rwb thaiv tsev ntawm lub cable, txhawm rau txhawm rau tshem tawm qhov yuam kev los ntawm qhov dej ntws tawm, "L" txuas nrog lub davhlau ya nyob twg, "E" txuas nrog lub plhaub, thiab "G" txuas nrog lub davhlau ya nyob twg core Insulating. txheej ntawm plhaub. Kev sib txuas ntawm cov xov hlau ntawm "L", "E" thiab "G" thiab cov khoom nyob rau hauv kev sim yuav tsum yog ib cov xov hlau uas muaj rwb thaiv tsev zoo thiab yuav tsum tsis txhob sib tw. Qhov saum npoo yuav tsum tsis txhob sib cuag nrog cov khoom nyob rau hauv kev sim.
3. Kev sib hloov ceev ntawm lub pob zeb kov yuav tsum tsis sib xws, feem ntau 120 rpm, nrog kev hloov pauv ntawm ± 20% tso cai, thiab qhov siab tshaj plaws ntawm ± 25%. Feem ntau, nws yuav tsum tau shaken rau ib feeb, thiab tom qab ntawd tus pointer tuaj yeem ruaj khov ua ntej nyeem ntawv. Yog hais tias muaj ib tug capacitor nyob rau hauv lub Circuit Court nyob rau hauv kev sim, co nws tsis tu ncua rau ib lub sij hawm ntawm lub sij hawm kom cia lub megohmmeter them lub capacitor. Tom qab tus pointer ruaj khov, nyeem ntawv. Tom qab kev ntsuas, tshem tawm cov xaim ua ntej thiab tom qab ntawd nres. Yog tias pom tus pointer taw tes rau xoom thaum ntsuas, nres tuav tes tam sim ntawd.
4. Tom qab kev ntsuas tiav lawm, cov khoom siv yuav tsum tau tso tawm tag nrho, txwv tsis pub nws yuav yooj yim ua rau hluav taws xob poob siab.
5. Nws yog txwv tsis pub ntsuas kev tiv thaiv kev tiv thaiv hluav taws xob thaum xob laim lossis ntawm cov khoom siv nrog cov hluav taws xob hluav taws xob nyob ze. Kev ntsuas tsuas yog ua tau thaum cov khoom siv tsis raug them thiab tsis tuaj yeem them vim yog induction los ntawm lwm qhov chaw siv hluav taws xob.
6. Ua ntej lub megohmmeter nres rotating, tsis txhob kov qhov ntsuas ntawm cov khoom siv los yog lub megohmmeter thaiv pawg nrog koj txhais tes. Thaum tshem cov xov hlau, tsis txhob kov ncaj qha rau ntawm qhov chaw ntawm cov hlau lead.
7. Lub megohmmeter yuav tsum tau calibrated tsis tu ncua. Txoj kev calibration yog ncaj qha ntsuas tus qauv resistor nrog ib qho nqi thiab xyuas seb qhov ntsuas qhov yuam kev puas nyob hauv qhov kev tso cai.
