Vim li cas nws tsis pom zoo kom siv lub tshuab ntsuas hluav taws xob thiab ntsuas hluav taws xob rau kev sib piv?
Yog tias koj yuav tsum xaiv cov cuab yeej siv feem ntau siv los ntawm cov kws tshaj lij hluav taws xob, kuv ntseeg tias multimeter yuav yog qhov kev xaiv zoo tshaj plaws. Raws li cov cuab yeej siv feem ntau, multimeter muaj qhov hloov tsis tau hauv lub siab ntawm cov neeg siv, thiab nws kuj ua rau cov neeg siv kev ntseeg siab rau nws. Txawm li cas los xij, puas yog multimeter tiag tiag infallible nyob rau hauv ntau yam kev sim ib puag ncig?
Qee lub sij hawm peb tau txais kev tawm tswv yim los ntawm cov neeg siv: "Cov zaub ntawm lub tshuab ntsuas hluav taws xob no txawv ntawm qhov multimeter (handheld). Peb cov khoom siv multimeter yog imported, tab sis domestically tsim los tseem tsis zoo" ...
Txawm li cas los xij, ntau npaum li cas chav rau kev sib piv muaj nyob nruab nrab ntawm multimeter thiab lub zog ntsuas hluav taws xob? Thaum muaj qhov sib txawv, qhov twg yog qhov tseeb thiab qhov twg tsis yog?
Ua ntej ntawm tag nrho cov, peb yuav tsum to taub dab tsi yog qhov tshwj xeeb parameter sib txawv ntawm ib tug multimeter thiab lub hwj chim analyzer.
bandwidth
Bandwidth yog tus nqi siv tseem ceeb rau seb lub teeb liab nyob rau hauv kev 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 tus lej me me ntawm cov khoom siv tes tuav tau ntsuas qhov nruab nrab zaus ntawm 400Hz, thaum tsib-thiab-ib nrab-tus lej thiab rau-tus lej multimeters tuaj yeem ntsuas 400Hz nruab nrab zaus cov cim. Desktop multimeters nrog 1.5 tus lej thiab siab dua tuaj yeem kuaj cov cim ntawm ntau pua kHz. Lub zog ntsuas hluav taws xob muaj qhov zoo dua hauv bandwidth. Piv txwv li, bandwidth parameter ntawm PA5000H yog 5M. Lub bandwidth tsis muaj hwj chim analyzers nyob hauv tsev thiab txawv teb chaws feem ntau yog teem rau ntawm 1M, 2M thiab lwm theem.
Tus nqi piv txwv
Tus nqi piv txwv kuj yog ib qho tseem ceeb parameter thaum kuaj. Tus nqi piv txwv ntawm multimeter tsis siab heev. Cov duab zoo dua yog nyob ib ncig ntawm ob peb puas K, thaum qhov piv txwv ntawm lub zog ntsuas hluav taws xob tau teeb tsa nyob ib puag ncig 2M.
Qhov tseeb
Qhov sib txawv ntawm qhov tseeb yog feem ntau qhia ntawm handheld multimeters. Tus lej ADC siv los ntawm peb cov multimeters uas feem ntau siv yog qhov qis, thiab qhov ntsuas qhov tseeb kuj tseem muaj qee qhov kev txwv; tau kawg, rau desktop multimeters, rau thiab ib nrab tus lej multimeters twb tau siv 24 Ntsis ADC, txawm tias tus qauv nrog 0.01% qhov tseeb ntawm lub zog ntsuas hluav taws xob tsuas yog 18- ntsis ADC.
synchronicity
Cov neeg siv feem ntau siv multimeters los ntsuas ib qho taw qhia, voltage, tam sim no lossis tsis kam. Yog tias lub zog raug kuaj, qhov ntsuas hluav taws xob yuav tsum tau ntsuas nyias, thiab tom qab ntawd qhov ntsuas tam sim no raug ntsuas rau kev suav; cov channel ntawm lub zog ntsuas hluav taws xob tuaj yeem ntsuas qhov hluav taws xob thiab tam sim no tib lub sijhawm, thiab tom qab ntawd suav cov tsis xws li lub zog.
