Taw qhia rau qhov tseeb ntawm Digital Multimeters
Qhov tseeb yog hais txog qhov ua yuam kev siab tshaj plaws uas tshwm sim hauv ib puag ncig kev siv tshwj xeeb. Hauv lwm lo lus, qhov tseeb yog siv los qhia txog qib uas ntsuas tus nqi ntawm digital multimeter ze rau tus nqi tiag tiag ntawm lub teeb liab ntsuas.
Rau ib qho digital multimeter, qhov tseeb feem ntau yog qhia raws li feem pua ntawm kev nyeem ntawv. Piv txwv li, kev nyeem ntawv qhov tseeb ntawm 1% txhais tau hais tias thaum lub digital multimeter qhia 100.0V, qhov tseeb voltage yuav nyob nruab nrab ntawm 99.0V thiab 101.0V.
Cov txiaj ntsig tshwj xeeb tuaj yeem raug ntxiv rau qhov tseeb hauv cov lus qhia ntxaws. Nws lub ntsiab lus yog hloov tus naj npawb ntawm cov lus uas yuav tsum tau ntxiv rau sab xis kawg ntawm qhov tso tawm *. Hauv qhov piv txwv dhau los, qhov tseeb yuav raug cim tias ± (1%+2). Yog li, yog tias GMM nyeem ntawv yog 100.0V, qhov tseeb voltage yuav nyob nruab nrab ntawm 98.8V thiab 101.2V.
Qhov tseeb ntawm analog meter yog xam raws li qhov yuam kev ntawm tag nrho cov ntau yam, es tsis yog cov ntawv nyeem. Qhov raug raug ntawm ib qho analog meter yog ± 2% lossis ± 3% ntawm tag nrho cov ntau yam. Qhov tseeb qhov tseeb ntawm ib qho digital multimeter yog nyob nruab nrab ntawm ± (0.7%+1) thiab ± (0.1%+1) ntawm kev nyeem ntawv, lossis ntau dua .
Kev ceev faj thaum siv multimeter
Kev ceev faj thaum siv multimeter
Thaum ntsuas qhov tam sim no thiab qhov hluav taws xob, nws tsis raug tso cai hloov qhov ntau nrog hluav taws xob
Thaum xaiv qhov ntau, nws yog ib qho tseem ceeb uas yuav tsum xub xaiv qhov loj dua thiab tom qab ntawd qhov me dua, txhawm rau ua kom tus nqi ntsuas ze li qhov ntau li ntau tau
Thaum ntsuas tsis kam, nws tsis tuaj yeem ntsuas nws nrog hluav taws xob. Vim hais tias thaum ntsuas tsis kam, lub multimeter yog powered los ntawm lub roj teeb sab hauv. Yog tias nws raug them rau kev ntsuas, nws yog qhov sib npaug rau kev sib txuas ib qho hluav taws xob ntxiv, uas yuav ua rau lub taub hau meter puas.
Tom qab siv, qhov hloov pauv yuav tsum tau muab tso rau hauv qhov siab tshaj plaws AC voltage txoj hauj lwm lossis qhov chaw nruab nrab.
Nco ntsoov tias thaum hloov qhov ntau ntawm ohmmeter, nws yog ib qho tsim nyog yuav tsum ua qhov kev hloov kho ohmic xoom yam tsis tas yuav tsum tau hloov kho txhua yam xoom.
