VI. Muaj pes tsawg hom RTD txhuas hlau txuas? Lawv cuam tshuam li cas?
Muaj 3 hom kev sib txuas ntawm cov hlau lead rau RTDs: 2-xaim, 3-xaim, thiab 4-xaim tshuab.
2-xaim RTD: Kev xaim yooj yim, tab sis suav nrog kev ua yuam kev ntxiv los ntawm cov hlau lead hlau tsis kam.Yog li ntawd, nws tsis haum rau Class A precision RTDs, thiab cov hlau lead yuav tsum tsis txhob ntev dhau.
3-xaim RTD: tuaj yeem tshem tawm cov kev cuam tshuam ntawm cov hlau lead hlau tsis kam, nrog cov neeg siab dua 2-xaim.
4-wire RTD: Tsis yog tsuas yog tshem tawm cov hlau lead hlau, tab sis kuj them nyiaj rau qhov kev tiv thaiv ntawm kev sib txuas ntawm cov xov hlau thaum lawv qhov sib npaug sib npaug.
VII. Qhov zoo thiab qhov tsis zoo ntawm Hom N thermocouple piv nrog Hom K yog dab tsi?
Qhov zoo ntawm Hom N thermocouple:
Muaj zog oxidation tsis kam ntawm qhov kub thiab txias ntev heev - lub sij hawm stability.In Hom K thermocouples, nyiam oxidation ntawm Cr thiab Si hauv NiCr zoo electrode ua rau tsis sib xws alloy muaj pes tsawg leeg thiab drift ntawm thermoelectric EMF.Type N thermocouple siv siab dua Cr thiab Si cov ntsiab lus, hloov oxidation hom los ntawm sab hauv oxidation mus rau sab nrauv oxidation tshwm sim.
Zoo thermal voj voog stability ntawm qis kub, thiab sib nqus transformation yog suppressed.
Muaj zog nuclear hluav taws xob tiv thaiv.Type N tshem tawm cov ntsiab lus yooj yim degradable Mn thiab Co pom nyob rau hauv Hom K, ntxiv kev txhim kho neutron hluav taws xob tiv thaiv.
Zoo linearity ntawm cov yam ntxwv thermoelectric dua li Hom K nyob rau hauv thaj tsam ntawm 400-1300 degree.
Qhov tsis zoo ntawm Hom N thermocouple:
Cov khoom siv ntawm Hom N yog qhov nyuaj dua li Hom K thiab nyuaj rau kev ua haujlwm.
Tus nqi siab dua.Cov thermal expansion coefficient ntawm Hom N yog li 15% qis dua stainless hlau, yog li lub plhaub ntawm Hom N ntxhia- insulated thermocouples yuav tsum tau ua los ntawm NiCrSi / NiSi alloy.
Loj tsis yog -linear yuam kev nyob rau hauv thaj tsam ntawm -200-400℃.
Chongqing Duchin Temperature Instrument - Koj tus kws tshaj lij hauv kev ntsuas kub!