Ntsiab Specifications & Performance of Digital Multimeters
1, Kev ntseeg tau:
Tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej hnyav, kev ntseeg siab yog qhov tseem ceeb dua li yav dhau los.
2, Kev ruaj ntseg:
Qhov kev txiav txim siab tseem ceeb hauv kev tsim cov digital multimeter yog qhov kev sim ywj pheej ua los ntawm lub chaw kuaj pom thiab luam tawm cov ntawv kuaj lub cev xws li UL, CSA, VDE, thiab lwm yam.
3, Kev daws teeb meem:
Kev daws teeb meem, tseem hu ua rhiab heev, yog qhov tsawg tshaj plaws ntawm kev ntsuas rau kev ntsuas cov txiaj ntsig ntawm ib qho exponential multimeter, uas tso cai rau kev soj ntsuam cov kev hloov me me hauv cov teeb liab ntsuas. Piv txwv li, yog tias qhov kev daws teeb meem ntawm digital multimeter hauv 4V ntau yog 1mV, ces thaum ntsuas 1V teeb liab, koj tuaj yeem pom qhov hloov me me ntawm 1mV. Qhov kev daws teeb meem ntawm digital multimeter feem ntau qhia hauv cov lej lossis cov lus.
The resolution of a digital multimeter is an important indicator, just like when you want to measure lengths less than 1 millimeter, you definitely won't use a ruler with the smallest unit in centimeters; Or if the temperature is 98.6 ℃ F, measuring with a thermometer marked only with integers is not useful. You need a thermometer with a resolution of 0.1 ℃ F.
Ib lub rooj nrog 3 thiab ib nrab tus lej, qhov twg peb tus lej kawg tuaj yeem pom tag nrho peb tus lej ntawm 0 txog 9, thiab thawj tus lej tsuas yog qhia ib thiab ib nrab tus lej (qhia 1 lossis tsis tau). Qhov no txhais tau hais tias lub rooj nrog 3 thiab ib nrab tus lej tuaj yeem ua tiav qhov kev daws teeb meem ntawm 1999 cov lus; 4.5 ntsis digital multimeter tuaj yeem ua tiav qhov kev daws teeb meem ntawm 19999 cov lus. Piav txog qhov kev daws teeb meem ntawm cov lus suav nrog cov lus zoo dua li piav qhia nrog tus lej. Qhov kev daws teeb meem ntawm 3.5 tus lej multimeter tam sim no tau nce mus rau 3200 lossis 4000 lo lus. 3200 lo lus digital multimeter muab kev daws teeb meem zoo dua rau qee qhov kev ntsuas. Piv txwv li, 1999 lo lus 'meter' tsis tuaj yeem tso saib 0.1V thaum ntsuas qhov voltage ntau dua 200V. Txawm li cas los xij, 3200 lo lus digital multimeter tseem tuaj yeem tso saib 0.1V thaum ntsuas qhov hluav taws xob ntawm 320V. Thaum ntsuas qhov ntsuas hluav taws xob siab dua 320V thiab qhov kev daws teeb meem ntawm 0.1V yog xav tau, yuav tsum muaj 20000 lo lus digital multimeter kim dua.
4, Qhov tseeb:
Qhov siab tshaj plaws tso cai yuam kev uas tshwm sim hauv ib puag ncig kev siv tshwj xeeb. Hauv lwm lo lus, qhov tseeb yog siv los qhia qhov kev sib ze ntawm qhov ntsuas tus nqi ntawm digital multimeter thiab tus nqi tiag tiag ntawm cov 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. Hauv phau ntawv qhia ntxaws ntxaws, tej zaum yuav muaj cov lej tshwj xeeb ntxiv rau qhov yooj yim precision, uas txhais tau hais tias muaj pes tsawg lo lus ntxiv los hloov pauv qhov kawg ntawm cov zaub. Hauv qhov piv txwv dhau los, qhov tseeb yuav raug cim tias ± (1%+2). Yog li ntawd, yog tias kev nyeem ntawv ntawm lub multimeter yog 100.0V, qhov tseeb voltage yuav nyob nruab nrab ntawm 98.8V thiab 101.2V. Qhov tseeb ntawm ib qho analog meter (los yog pointer multimeter) yog xam raws li tag nrho cov kev ua yuam kev, es tsis yog cov ntawv nyeem. Qhov raug raug ntawm tus pointer multimeter yog ± 2% lossis ± 3% ntawm tag nrho ntau yam. Qhov tseeb qhov tseeb ntawm ib qho digital multimeter yog nruab nrab ntawm ± (0.7%+1) thiab ± (0.1%+1) ntawm kev nyeem ntawv, lossis ntau dua.
