Kev sib raug zoo ntawm kev ntsuas ceev ntawm megohmmeter thiab ntsuas qhov ntsuas hluav taws xob tiv thaiv tus nqi
Hais txog kev sib raug zoo ntawm kev ntsuas ceev ntawm megohmmeter thiab ntsuas qhov ntsuas hluav taws xob tiv thaiv tus nqi, qhov sib txawv ntawm qhov ntsuas megohmmeter yuav tsis cuam tshuam qhov ntsuas ntawm qhov ntsuas qhov ntsuas siab. Thaum siv lub megohmmeter los ntsuas qhov rwb thaiv tsev tiv thaiv DC resistance tester, yuav txawv.
Feem ntau hais lus, tsuav yog qhov ceev ntawm megohmmeter tsis sib xws, nws yuav tsis cuam tshuam qhov ntsuas ntawm qhov ruaj khov-tus nqi tsis kam.
Vim hais tias kev txiav txim los ntawm kev ntsuas mechanism ntawm lub megohmmeter, nws yog tsim los ntawm ib tug magnetoelectric ratio meter thiab ib tug DC tes ua lub tshuab hluav taws xob.
Qhov voltage ntawm lub tshuab hluav taws xob yog txiav txim siab los ntawm kev sib hloov ceev. Lub rotor tig nrawm dua (uas yog, qhov nrawm nrawm ntawm cov hlau nplaum hauv lub kauj yuav nrawm dua), qhov siab dua qhov hluav taws xob tsim. Txij li thaum kev nyeem ntawv ntawm megohmmeter qhia txog qhov piv ntawm lub tshuab hluav taws xob hluav taws xob thiab tam sim no, thaum lub zog hloov pauv, qhov tam sim no dhau los ntawm lub kauj tam sim no ntawm megohmmeter kuj hloov pauv, yog li ntsuas ntsuas kev nyeem ntawv tseem tsis hloov pauv.
Txawm li cas los xij, qhov xwm txheej thaum ntsuas kev tiv thaiv hluav taws xob nrog lub megohmmeter thiab DC resistance tester txawv.
Vim hais tias cov xau tam sim no los ntawm qhov nruab nrab insulating muaj feem xyuam rau qib ntawm cov ntaub ntawv siv hluav taws xob, tshwj xeeb tshaj yog cov rwb thaiv tsev nrog cov teeb meem hauv zos, nws tsuas tuaj yeem cuam tshuam thaum qhov hluav taws xob nce mus txog qee txoj haujlwm. Yog tias qhov kev sib hloov ceev qeeb dhau thiab qhov hluav taws xob tsawg dhau, qhov ntsuas qhov ntsuas yuav siab.
Tsis tas li ntawd, kev ceev tsis sib xws kuj cuam tshuam rau kev ntsuas ntsuas. Yog hais tias nws hloov los ntawm ceev mus rau qeeb, qhov voltage them ntawm ob hnub ntawm lub insulating nruab nrab ntawm ib tug ceev ceev yuav siab tshaj lub davhlau ya nyob twg voltage ntawm lub megger generator, ua rau ib tug tam sim no backflow tshwm sim, uas yuav ua rau cov kev ntsuas tau siab dua.
Nws tuaj yeem pom tau tias lub megohmmeter yuav tsum khaws cov ntsuas ceev tig sib npaug, uas feem ntau yog 120 revolutions ib feeb. Nws tuaj yeem muaj qhov hloov pauv ntawm ± 20%, tab sis nws yuav tsum tsis txhob siab tshaj ± 25% feem ntau.
Txhawm rau kom ntseeg tau tias qhov kev sib hloov ceev ntawm megohmmeter tsis siab dhau lawm, qee qhov megohmmeters tau nruab nrog cov tswj ceev hauv lub tshuab cranking. Nws siv cov nyhuv ntawm inertial centrifugal quab yuam. Thaum lub nrawm nrawm nrawm dhau, lub tshuab hluav taws xob ceev yuav cia li qhib lub tshuab hluav taws xob. Thaum lub rotor yog sib cais los ntawm crank kov, rotor ceev yuav maj mam txo. Thaum nws poob mus rau ib qho kev ceev, tus regulator yuav rov qab lub tshuab hluav taws xob rotor thiab crank kov rau lawv cov haujlwm qub.
