Yuav siv lub digital multimeter los ntsuas PT100 kub sensor
Multimeter yog ib lub hom phiaj siv hluav taws xob ntsuas ntsuas uas tuaj yeem muaj ntau yam haujlwm tshwj xeeb, tab sis nws lub luag haujlwm tseem ceeb yog ntsuas qhov hluav taws xob, tsis kam thiab tam sim no. Multimeters muab faib ua digital multimeters thiab ib txwm pointer electromagnetic deflection multimeters.
Kev ntsuas kev tiv thaiv nrog digital multimeter yog qhov yooj yim heev, tsuas yog teeb tsa qhov ntau ntawm ohm thiab nyeem ntawv. Qhov kev tawm tsam tau muab faib ua xya theem: 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ, thiab 20MΩ. Thaum ntsuas, teeb tsa qhov hloov pauv mus rau qhov Ω ntau, ntxig cov hlau kuaj dub rau hauv COM jack, thiab qhov ntsuas liab ua rau hauv V / Ω jack nyeem. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias thaum ntsuas kev tiv thaiv hauv ib lub voj voog, lub hwj chim yuav tsum raug txiav tawm.
Piv txwv li, yog tias tus nqi tsis kam yog 10K, teem lub digital multimeter rau 20K (qhov muaj qhov loj dua thiab qhov kev tiv thaiv ze tshaj tuaj yeem tau txais qhov ntsuas qhov tseeb tshaj plaws), thiab tom qab ntawd ntxig cov hlau lead dub rau hauv COM qhov (dub), ntxig cov hlau kuaj liab rau hauv VΩ qhov (liab), thiab tom qab ntawd kov qhov kawg ntawm qhov resistor nrog cov hlau lead.
Nws yuav tsum tau muab sau tseg tias yog hais tias tus nqi kuj yog loj, tsis txhob kov lub 2nd davhlau ya nyob twg resistor nrog ob txhais tes, vim hais tias tib neeg lub cev kuj muaj kuj. Kov lub 2nd davhlau ya nyob twg txhais tau hais tias qhov ntsuas tsis kam thiab tib neeg lub cev tiv thaiv tau txuas nrog tib lub sijhawm, uas yuav ua rau muaj qhov yuam kev. Nws tsis muaj teeb meem yog tias koj kov ib txhais tes, yog li koj tuaj yeem tau txais Resistance nyeem ntawv.
Yuav ua li cas siv lub tshuab hluav taws xob digital los ntsuas PT100 yog thawj zaug kho cov digital multimeter mus rau 200 ohm ntau yam, thiab tom qab ntawd siv ob tus cwj mem ntawm multimeter kov ob tus pins ntawm PT100 feem. Yog tias muaj ntau dua 100 ohms tso tawm ntawm cov duab digital thiab cov ntaub ntawv tso tawm yog qhov ruaj khov, ua pov thawj tias qhov ntsuas kub ntawm PT100 yog ib yam khoom qub. Cov saum toj no yog txoj kev xeem tshwj xeeb.
