Vim li cas ho tsis pom zoo siv multimeter thiab lub zog ntsuas ntsuas los sib piv?
Yog tias koj xav xaiv cov cuab yeej siv feem ntau rau cov kws tsim hluav taws xob, kuv ntseeg tias tus xaiv yuav yog ib qho multimeter. Raws li cov cuab yeej siv feem ntau, multimeter tuav txoj haujlwm tsis tuaj yeem hloov pauv hauv lub siab ntawm cov neeg siv thiab kuj tau tsim kev ntseeg siab rau nws. Txawm li cas los xij, nws puas muaj tseeb tias multimeter yuav tsis ua yuam kev hauv ntau qhov chaw sim?
muaj
Thaum tau txais kev tawm tswv yim los ntawm cov neeg siv, lawv yuav hais tias, "Cov zaub ntawm lub tshuab ntsuas hluav taws xob no txawv ntawm lub tshuab multimeter (handheld). Peb cov khoom siv multimeter yog imported, tab sis nws tseem tsis tuaj yeem tsim tawm hauv tsev."
Txawm li cas los xij, qhov chaw ntau npaum li cas rau kev sib piv ntawm multimeter thiab lub zog ntsuas hluav taws xob? Dab tsi yog qhov yog thiab tsis yog thaum muaj qhov sib txawv?
Ua ntej, peb yuav tsum tau qhia meej txog qhov txawv ntawm qhov tsis sib xws ntawm multimeter thiab lub zog ntsuas hluav taws xob.
bandwidth
Bandwidth yog tus nqi siv tseem ceeb rau seb lub teeb liab ntsuas puas tuaj yeem ntsuas qhov tseeb. Qhov ntsuas bandwidth ntawm cov multimeters feem ntau yog nyob ib ncig ntawm 40-70Hz. Qee lub desktop thiab ib qho me me ntawm cov khoom siv tes tuav tau tuaj yeem ntsuas qhov nruab nrab zaus cov cim ntawm 400Hz, thaum lub desktop multimeters nrog tsib thiab ib nrab khoom, rau thiab ib nrab khoom, thiab saum toj no kuj tuaj yeem kuaj cov cim ntawm ntau pua kHz. Lub zog ntsuas hluav taws xob muaj qhov zoo hauv bandwidth, piv txwv li, bandwidth parameter ntawm PA5000H yog 5M, thiab bandwidth tsis muaj zog ntawm cov ntsuas hluav taws xob feem ntau yog teem rau 1M thiab 2M qib ob leeg hauv tsev thiab txawv teb chaws.
tus nqi piv txwv
Tus nqi piv txwv kuj yog qhov tseem ceeb ntawm qhov ntsuas thaum kuaj. Tus nqi piv txwv ntawm lub multimeter tsis siab heev, nrog rau cov qauv duab ua tau zoo dua nyob ib ncig ntawm ob peb puas k, thaum tus nqi piv txwv ntawm lub zog ntsuas hluav taws xob tau teeb tsa nyob ib puag ncig 2M.
raug
Qhov sib txawv ntawm qhov tseeb yog feem ntau qhia ntawm handheld multimeters. Peb cov khoom siv multimeter feem ntau siv ADC tsawg tsawg, thiab tej zaum yuav muaj qee qhov kev txwv rau qhov tseeb ntawm kev sim; Tau kawg, rau lub desktop multimeter, ib qho rau thiab ib nrab me me multimeter twb tau siv 24 ntsis ADC, thiab txawm tias lub zog ntsuas hluav taws xob nrog 0.01% tus qauv raug tsuas yog 18 ntsis ADC.
Synchronization
Cov neeg siv feem ntau siv multimeter los ntsuas ib qho ntsuas, qhov hluav taws xob, tam sim no, lossis tsis kam. Yog tias qhov ntsuas hluav taws xob xav tau kev ntsuas hluav taws xob sib cais, ces ntsuas tam sim no rau kev suav; Cov channel ntawm lub zog ntsuas hluav taws xob tuaj yeem sim ib txhij ntsuas qhov hluav taws xob thiab tam sim no, thiab tom qab ntawd suav cov ntsuas tsis xws li lub zog.
